REST APIs are the interface between clients and servers that allows for data to be shared across platforms, providing a seamless connection between applications, databases, and other resources. A REST API Developer is the programmer who helps clients connect their applications to a certain platform and ensure data is flowing between the two in an efficient, secure manner. This can help to reduce friction, improve performance & scalability, boost security, streamline website navigation, and more.

REST API Developers build and maintain custom programming to enable automated data retrieval and communication with a client’s desired application or platform. This can encompass services such as quickly integrating third-party payment systems into an existing website, minimizing manual work and improving customer experience. They may also incorporate priority systems; for example creating different APIs for handling bulk vs single requests for heavy workloads. Ultimately a REST API Developer helps clients bridge the gap between complex platforms and transform data into valuable business insights.

Here’s some projects that our expert REST API Developers made real:

  • Establishing communication between different applications
  • Creating priority systems for managing large volumes of requests
  • Integrating third-party payment systems into an existing website
  • Developing programming to seamlessly retrieve dynamic data
  • Designing secure connections to protect confidential information

Our highly-skilled REST API Developers are experts when it comes to stitching together the critical links which connect disparate platforms together. With years of experience they have been able to tackle innumerable projects which have led to successful outcomes for our clients. If you have an issue related to connecting your application with another platform or require automated data retrieval services then you can post your own project here on Freelancer.com and hire one of our experienced developers today!

จาก 49,294 รีวิว ลูกค้าให้คะแนน REST API Developers 4.9 จาก 5 ดาว
จ้าง REST API Developers

REST APIs are the interface between clients and servers that allows for data to be shared across platforms, providing a seamless connection between applications, databases, and other resources. A REST API Developer is the programmer who helps clients connect their applications to a certain platform and ensure data is flowing between the two in an efficient, secure manner. This can help to reduce friction, improve performance & scalability, boost security, streamline website navigation, and more.

REST API Developers build and maintain custom programming to enable automated data retrieval and communication with a client’s desired application or platform. This can encompass services such as quickly integrating third-party payment systems into an existing website, minimizing manual work and improving customer experience. They may also incorporate priority systems; for example creating different APIs for handling bulk vs single requests for heavy workloads. Ultimately a REST API Developer helps clients bridge the gap between complex platforms and transform data into valuable business insights.

Here’s some projects that our expert REST API Developers made real:

  • Establishing communication between different applications
  • Creating priority systems for managing large volumes of requests
  • Integrating third-party payment systems into an existing website
  • Developing programming to seamlessly retrieve dynamic data
  • Designing secure connections to protect confidential information

Our highly-skilled REST API Developers are experts when it comes to stitching together the critical links which connect disparate platforms together. With years of experience they have been able to tackle innumerable projects which have led to successful outcomes for our clients. If you have an issue related to connecting your application with another platform or require automated data retrieval services then you can post your own project here on Freelancer.com and hire one of our experienced developers today!

จาก 49,294 รีวิว ลูกค้าให้คะแนน REST API Developers 4.9 จาก 5 ดาว
จ้าง REST API Developers

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    44 งานที่พบ
    ChatGPT-N8N-Powered WordPress Platform
    6 วัน left
    ยืนยันแล้ว

    I need a WordPress site that talks directly to ChatGPT through the OpenAI API while letting N8N handle the heavy-lifting for automated scheduling and publishing. The goal is to push fresh content every day, week, and month—articles, videos, and infographics—without manual effort. Phase-one priorities The first milestone is the ChatGPT integration: prompts in, polished copy out, automatically routed through N8N into WordPress as drafts or instant posts. Event-calendar views (week, month, year) and a solid search function are important, yet they can follow once the core AI workflow is stable. Core features I expect in this build • Custom post types for articles, embedded videos, and infographics, each mapped to an N8N pipeline • A front-page layout that high...

    $77 Average bid
    $77 การประมูลเฉลี่ย
    19 คำเสนอราคา

    I’m looking for a sharp front-end specialist to take our existing web application and make the user experience shine. The backend is already solid; what I need now is modern, responsive and accessible UI work that feels fast and polished across major browsers and devices. You’ll be working with our REST-based API, so comfort with JSON, Axios / fetch and state management (React + Redux or comparable) is important. Figma files and a clear component map are ready—your task is to translate those designs into production-ready code, wire them to the API, and leave the codebase clean, tested and easy to maintain. Key things I expect • Pixel-perfect implementation of the supplied designs • Reusable, well-documented components • Cross-browser and mobile resp...

    $19 / hr Average bid
    $19 / hr การประมูลเฉลี่ย
    191 คำเสนอราคา

    I have an Android application with an admin panel interface already designed in HTML, CSS, and Bootstrap. Previously the backend was built using ASP.NET Web API. I now want to rebuild the backend using Laravel and connect it with the existing Android application and admin panel. The freelancer will develop Laravel REST APIs and integrate them with the provided admin panel frontend. Scope of Work: Develop Laravel backend REST APIs Implement full CRUD operations (Add / Edit / Delete / View) Integrate APIs with provided admin panel frontend (HTML, CSS, Bootstrap) Ensure APIs work properly with existing Android application Setup MySQL database structure Convert existing database structure if required Deploy Laravel backend on hosting server Deploy admin panel frontend on server Configure fi...

    $101 Average bid
    $101 การประมูลเฉลี่ย
    41 คำเสนอราคา

    Saya membutuhkan sebuah aplikasi mobile sederhana yang bisa dijalankan di iOS dan Android. Fokus utamanya hanyalah modul Login pengguna—cukup layar masuk, pendaftaran, dan lupa kata sandi yang terhubung ke API sederhana (REST atau GraphQL). Silakan gunakan pendekatan native maupun cross-platform (Flutter, React Native, atau sejenisnya) asalkan hasil akhirnya stabil di kedua platform. Deliverable yang saya harapkan: • Kode sumber lengkap dan terstruktur • Berkas build/arsip siap rilis untuk App Store & Play Store • Dokumentasi singkat cara menjalankan proyek secara lokal dan cara mengganti endpoint backend Saya akan menilai proyek berdasarkan kemudahan build, kejelasan struktur kode, dan kelancaran proses login.

    $28 / hr Average bid
    $28 / hr การประมูลเฉลี่ย
    18 คำเสนอราคา

    Job Overview: We are seeking a highly skilled Senior ERP Developer with 5+ years of experience to design and build robust, scalable ERP solutions tailored for the manufacturing industry. The ideal candidate will have strong expertise in modern web technologies including React.js, Node.js, and NestJS, along with hands-on experience in both relational (SQL) and NoSQL (MongoDB) databases. In this role, you will be responsible for developing and enhancing ERP modules, contributing to system architecture, and ensuring high performance and reliability of applications. You will work closely with cross-functional teams to translate business requirements into technical solutions, with a strong focus on manufacturing workflows and enterprise-grade systems. Experience with cloud platforms such as AWS...

    $384 Average bid
    $384 การประมูลเฉลี่ย
    57 คำเสนอราคา
    Досвідчений Laravel Розробник
    6 วัน left
    ยืนยันแล้ว

    Я підтримую великий веб-проєкт і хочу залучити досвідченого Laravel-фахівця, який вільно володіє українською та англійською. Вам доведеться паралельно розробляти нові модулі, тримати в порядку наявний код і безболісно підключати сторонні REST API. Працюємо з чистим PHP 8+, Laravel 9/10, MySQL та git-workflow, тож упевнений досвід у цих технологіях критично важливий. Буде здорово, якщо ви також орієнтуєтеся у Vue.js чи React і комфортно почуваєтесь із Docker — ці навички час від часу знадобляться для фронтенд-компонентів та контейнеризації. Працюємо повністю віддалено, графік гнучкий, а співпраця розрахована на довгу дистанцію: мені потрібен партнер, який може брати завдання у роботу самостійно, пропонувати рішення і відповідати за якість коду. Очікую, що при приєднанні ви: ...

    $18 / hr Average bid
    $18 / hr การประมูลเฉลี่ย
    44 คำเสนอราคา
    Godot/Unity Desktop Slot Game -- 2
    6 วัน left
    ยืนยันแล้ว

    Our desktop slot game has just reached alpha, and I need an experienced Godot or Unity developer to keep the momentum going. The core reels and pay-table logic are already in place; the immediate focus is polishing the user interface and wiring the client to our backend services so we can start live balance updates, authentication, and session tracking. Here’s what I’m aiming for over the next few sprints: • Rebuild the lobby and in-game HUD so they scale cleanly on common desktop resolutions (Full HD and 1440p are top priority). • Implement smooth transitions, button states, win animations, and sound hooks that match the existing art and audio assets. • Integrate REST endpoints for login, balance fetch, spin requests, and result callbacks. The backend is ...

    $35 / hr Average bid
    $35 / hr การประมูลเฉลี่ย
    79 คำเสนอราคา

    I’m building a fully-automated lead generation engine and need an engineer who can wire everything together end-to-end. The core flow pulls prospects from Clodo, enriches them with Clay, sequences outreach through Apollo, syncs engagement data back to HubSpot, and surfaces every scored lead in a dedicated Slack channel. All of these services expose solid REST/GraphQL APIs, so the job is primarily about clean JSON handling and resilient workflow orchestration. Key functions I want in place: • Email outreaches, data enrichment, plus lead scoring and routing run automatically on every new record. • GitHub Actions triggers and monitors the pipeline, with Python scripts responsible for transformation, enrichment and retry logic. • Each step posts concise status and error m...

    $118 Average bid
    $118 การประมูลเฉลี่ย
    21 คำเสนอราคา
    Hourly Lovable Web App Developer
    5 วัน left
    ยืนยันแล้ว

    I’m running several SaaS projects on Lovable and need a versatile developer I can rely on by the hour. Every task revolves around building and refining full-stack web applications: crafting responsive, accessible interfaces in React.js, wiring up the backend logic, and exposing or consuming well-structured APIs. Most assignments arrive as concise tickets—sometimes a fresh feature, sometimes a bug fix—so the ability to switch context quickly and keep code clean is key. You’ll commit through Git, open pull requests for review, and keep progress visible on the shared board. I release payment the moment your code lands successfully in staging. Typical deliverables • A new or updated React.js screen that meets supplied Figma specs • Corresponding backen...

    $13 / hr Average bid
    $13 / hr การประมูลเฉลี่ย
    294 คำเสนอราคา
    Full-Stack Bug Fixes & Features
    5 วัน left
    ยืนยันแล้ว

    My web application needs a thorough full-stack pass. Both the frontend and backend contain bugs that appear during normal user flows, and resolving these is the first priority. Right after stabilising the codebase, we will dive into new functionality: rolling out fresh features, polishing and extending existing ones, and wiring in selected third-party services. Feature work spans three fronts: user-interface improvements built in React (TypeScript), deeper backend logic in Node.js/Express, and new REST/GraphQL APIs that will be documented with OpenAPI. Everything lives in a GitHub repo with a Kanban board and CI pipeline; work happens on feature branches, merged by pull request with unit tests. Deliverables • Repaired critical and minor bugs recorded in the tracker • Updated ...

    $254 Average bid
    $254 การประมูลเฉลี่ย
    99 คำเสนอราคา

    My goal is to put an always-on, online vibration-based condition monitoring solution in place for our industrial machinery. The system must continuously read and log RPM, displacement, and acceleration, then publish the data to a web dashboard where trending, thresholds, and automatic alerts can be configured in real time. Here is what I already have and what I expect from you: • Sensors & acquisition: I can source standard piezo or MEMS accelerometers and an RPM pickup, but I need guidance on the optimal sensor grade, mounting positions, and a compact DAQ (Raspberry Pi, ESP32, NI cDAQ, or similar—open to your recommendation) capable of simultaneous sampling. • Connectivity & protocol: Data has to leave the shop floor securely. MQTT or REST over Ethernet/Wi-Fi i...

    $140 Average bid
    $140 การประมูลเฉลี่ย
    34 คำเสนอราคา

    Quiero integrar mi sitio de Wix con N8N y para que los procesos de negocio se ejecuten solos. La idea es contar con un ecosistema donde cada vez que un usuario interactúe en la web (por ejemplo, completa un formulario o realiza una compra) se desencadene un flujo de trabajo en N8N que actualice datos, envíe mensajes en y, de ser necesario, devuelva resultados visibles en Wix. Trabajo deseado • Configurar y personalizar N8N — ya sea en cloud o self-hosted, lo que resulte más eficiente — creando los nodos y webhooks necesarios. • Conectar Wix (Velo) mediante API REST o las herramientas internas para que los disparadores lleguen a N8N sin fricciones. • Integrar de forma que reciba notificaciones claras y, si corresponde, permita al equip...

    $448 Average bid
    $448 การประมูลเฉลี่ย
    82 คำเสนอราคา
    Multi-Vehicle GPRS Tracking System
    4 วัน left
    ยืนยันแล้ว

    I want to build a turnkey GPRS-based tracking solution for a small fleet of up to ten vehicles. The platform must stream each vehicle’s live GPS position, keep a searchable log of every route taken, raise instant geofencing alerts, and give me remote engine-cut capability together with reliable petrol-level monitoring. Hardware • A compact on-board unit that pairs a high-sensitivity GPS receiver with a quad-band GSM/GPRS modem. • Wired inputs for ignition status, fuel-level sensor and an output relay for safe engine cut-off. • Over-the-air firmware update support so I never have to recall a device for basic fixes or tweaks. Firmware & Protocol The device should package GPS, fuel and status data in efficient binary or JSON packets and push them to my serve...

    $167 Average bid
    $167 การประมูลเฉลี่ย
    135 คำเสนอราคา
    Досвідчений Laravel Розробник (API, Dashboard)
    4 วัน left
    ยืนยันแล้ว

    Ми шукаємо досвідченого Laravel розробника для роботи над веб-проєктом. Потрібно розробляти нові функції, підтримувати існуючий код та інтегрувати сторонні API. Вимоги: Досвід з Laravel (2+ роки) Знання PHP, MySQL Досвід роботи з REST API Вміння працювати самостійно Буде плюсом: Досвід з Vue.js або React Розуміння Docker Формат: віддалена робота, довгострокова співпраця.

    $21 / hr Average bid
    $21 / hr การประมูลเฉลี่ย
    79 คำเสนอราคา

    I want a complete Android-only social networking app built from the ground up and, just as important, I want to understand every step that goes into creating it. Your role will be two-fold: first, deliver a fully functional APK (plus clean, well-commented source code); second, walk me through your architecture, toolchain, and deployment process so I can replicate or extend the project later. Core expectations • Native Android build (Kotlin or Java with Android Studio). • Standard social features—user registration/login, profile editing, posts with images/video, likes/comments, and real-time notifications. • Secure back-end (Firebase, Supabase, or a lightweight REST API with SQL) and cloud storage for media. • Clear documentation: project setup, key code s...

    $396 Average bid
    $396 การประมูลเฉลี่ย
    38 คำเสนอราคา

    Full-Stack Software Engineer — Sherpa Teknologi Lokasi: Jakarta (hybrid / fleksibel) · Tipe: Full-time · Mulai: Secepatnya Tentang kami Sherpa Teknologi mentransformasi bisnis partner kami dengan mengidentifikasi dan mengimplementasikan solusi teknologi yang berdampak komersial. Kami sedang membangun platform olahraga dengan memperluas technology stack kami saat ini, yang sudah mencakup automated upload, face recognition, sistem booking-to-payment yang sepenuhnya online, dan integrasi dengan payment provider. Kami mencari Full-Stack Engineer untuk membantu mewujudkan hal ini. Kami senang membangun hal-hal inovatif yang berdampak positif bagi bisnis, orang, dan Indonesia. Kami self-driven, kami ambisius, kami mampu bekerja mandiri sekaligus berkolaborasi dengan baik, kam...

    $5 / hr Average bid
    $5 / hr การประมูลเฉลี่ย
    5 คำเสนอราคา
    Atera-Autotask Zapier Automation
    4 วัน left
    ยืนยันแล้ว

    I need a set of production-ready Zaps that link Atera RMM with Autotask PSA through their REST APIs. The goal is to eliminate the swivel-chair work my team currently does and have data move instantly and accurately between the two systems. Core workflows to build and fully test: • Ticket creation and updates – alerts that exceed set thresholds in Atera should open or update a corresponding ticket in Autotask. • User account synchronization – new or changed contacts in either platform. • Alert notifications – critical device alerts from Atera must trigger real-time notifications inside Autotask, including the original alert body for context. • Company ↔ Customer synchronization – when a company is added or edited in Autotask it should ...

    $446 Average bid
    $446 การประมูลเฉลี่ย
    155 คำเสนอราคา
    ESP32 Table-Call Firmware
    4 วัน left
    ยืนยันแล้ว

    I’m putting together an MVP that lets guests press a single mechanical button at their table; the ESP32 lights up a WS2812 LED ring (powered directly from the ESP32) and reports the call to my Supabase backend. Your task is to write the complete device-side firmware and show it running on real hardware. Core behaviour • Idle until the button is tapped. • State machine: blue for the first 0-2 min, green for 2-5 min, red after 5 min. • A 3-second long-press closes the event and turns the LEDs off. • Solid, reliable debounce for the mechanical button. Networking The device connects over Wi-Fi, tags every event with restaurant_id, table_id and device_id, and posts JSON to the Supabase REST endpoint I’ll supply. If the network drops it should queue lo...

    $142 Average bid
    $142 การประมูลเฉลี่ย
    57 คำเสนอราคา

    I need a lean, battery-friendly Android app that can stream a smartphone’s GPS coordinates in real time. Once the user grants permission, the app should run as a foreground service, capture accurate latitude and longitude, and post them every few seconds to the REST endpoint I will provide. A small in-app Google Maps view must mirror the live position so we can confirm everything instantly. Please follow current Android 13 location-permission rules and make sure tracking survives reboots, Doze, and other battery optimisations. I will share the API spec; you may use Retrofit, Volley, or any modern HTTP client you prefer, as long as JSON payloads stay lightweight. Deliverables • Complete Android Studio project (Kotlin or Java) with well-commented code • Signed release A...

    $13 Average bid
    $13 การประมูลเฉลี่ย
    13 คำเสนอราคา

    VNSRooms is ready for its leap from concept to a fully-fledged mobile experience. The goal is a single Flutter code-base that ships smooth, beautiful, and highly scalable Android & iOS apps for booking verified accommodations across India. Core scope • Craft a modern, reactive UI that lets users browse PGs, flats, villas, farmhouses and vacation stays with fast, fluid transitions. • Wire up secure authentication by email + password, supported by JWT tokens and OTP verification for critical actions. • Implement advanced search and filtering, property cards, rich image galleries, amenity lists, and geo-tagged location display. • Build an end-to-end booking flow: wishlist → booking calendar → checkout. • Integrate Razorpay as the exclusive pay...

    $383 Average bid
    $383 การประมูลเฉลี่ย
    86 คำเสนอราคา

    Saya membutuhkan sebuah aplikasi mobile sederhana yang bisa dijalankan di iOS dan Android. Fokus utamanya hanyalah modul Login pengguna—cukup layar masuk, pendaftaran, dan lupa kata sandi yang terhubung ke API sederhana (REST atau GraphQL). Silakan gunakan pendekatan native maupun cross-platform (Flutter, React Native, atau sejenisnya) asalkan hasil akhirnya stabil di kedua platform. Deliverable yang saya harapkan: • Kode sumber lengkap dan terstruktur • Berkas build/arsip siap rilis untuk App Store & Play Store • Dokumentasi singkat cara menjalankan proyek secara lokal dan cara mengganti endpoint backend Saya akan menilai proyek berdasarkan kemudahan build, kejelasan struktur kode, dan kelancaran proses login.

    $448 / hr Average bid
    $448 / hr การประมูลเฉลี่ย
    31 คำเสนอราคา
    Truck Delivery Planning Web Tool
    3 วัน left
    ยืนยันแล้ว

    I need a web-based system that allows our dispatchers to plan and control daily truck operations from a single screen. The application must combine three core abilities: smart route optimisation, real-time fleet tracking and an intuitive delivery-scheduling workspace. Here is what I expect to receive: • Fully responsive web app, secured with role-based log-in, designed around dispatcher workflows. • Map dashboard (Google Maps, Mapbox or similar) that plots every vehicle’s live GPS feed and refreshes automatically. • Optimisation engine that can reorder stops, respect delivery time windows, vehicle capacity and current traffic, then output the most efficient route with distance and time savings visible. • Drag-and-drop scheduler and calendar view where new jobs can...

    $7523 Average bid
    $7523 การประมูลเฉลี่ย
    212 คำเสนอราคา
    Email NLP Classifier & NER -- 2
    3 วัน left
    ยืนยันแล้ว

    I have a large, continually growing collection of emails that needs to be processed automatically. The goal is twofold: 1. Classify each email into predefined business categories with high accuracy. 2. Extract relevant entities (names, dates, IDs, product references, etc.) from the same messages. You will own the entire machine-learning workflow. That means cleaning and exploring the raw email text, crafting useful features, training and tuning your models, and packaging the final solution behind an API that I can call from our existing back-end. Python is a must, and I’m comfortable with either TensorFlow or PyTorch for the deep-learning components—use whichever lets you move fastest. Traditional techniques with Scikit-learn are welcome wherever they make sense. Because t...

    $155 Average bid
    $155 การประมูลเฉลี่ย
    10 คำเสนอราคา

    We are looking for a skilled developer to build a Google Drive to Google Gemini AI Connector. The goal is to create a secure, reusable application that allows querying and processing documents stored in Google Drive using Gemini’s AI capabilities. Key Features: - OAuth2-secured Google Drive integration (read-only access) - Full Google Gemini API support - RAG (Retrieval-Augmented Generation) for intelligent document processing - Web interface for user-friendly querying - REST API for programmatic acces - Support for multiple file formats: PDF, Docs, Word, Text, CSV - Reusable template to create multiple independent knowledge bases Deliverables: - Fully functional connector application - Complete, well-documented source code - Configuration files and setup instructions - Web interfa...

    $179 Average bid
    $179 การประมูลเฉลี่ย
    164 คำเสนอราคา

    Saya sedang mencari pengembang yang dapat merancang dan membangun sebuah aplikasi mobile khusus untuk Android. Fokus utamanya adalah fitur autentikasi pengguna—login, pendaftaran, serta pengelolaan sesi yang aman dan andal. Ruang lingkup yang saya bayangkan: • Rancang UI/UX sederhana namun estetik, sesuai panduan Material Design. • Implementasi layar onboarding, formulir login/daftar, dan reset kata sandi. • Integrasi backend (REST atau Firebase) untuk otentikasi berbasis email/nomor telepon. • Penanganan validasi, error message, dan state loading secara elegan. • Kode bersih, terdokumentasi, dan siap dikembangkan lebih lanjut (MVVM/Kotlin dianjurkan, tapi terbuka untuk pendekatan terbaik Anda). Kriteria penerimaan: – Aplikasi APK debug &...

    $21 / hr Average bid
    $21 / hr การประมูลเฉลี่ย
    25 คำเสนอราคา
    PayPal Checkout for Bulk SMS Website -- 2
    3 วัน left
    ยืนยันแล้ว

    I run an online platform where clients create and manage customer-engagement SMS campaigns. I now need PayPal Checkout woven seamlessly into the site so users can pay for their messaging credits without ever leaving the flow of campaign creation. Here is what I’m after: • Add the latest PayPal Smart Buttons to the purchase page that sells SMS credit bundles. • Support both Sandbox and Live modes so I can test before going public. • Once a transaction is authorised, instantly credit the buyer’s account and trigger our existing confirmation email/SMS. • Capture and store PayPal transaction IDs in my MySQL database; I’ll provide the table schema. • Make sure the integration works smoothly on desktop and mobile, and that errors (cancellation...

    $25 Average bid
    $25 การประมูลเฉลี่ย
    71 คำเสนอราคา
    Supabase AI Accounting App Enhancements
    3 วัน left
    ยืนยันแล้ว

    I have an AI-powered accounting web app that already runs on Supabase and a Lovable-based frontend. My co-founder and I are now racing toward launch and need an experienced full-stack developer who can jump straight into our existing codebase, clear out lingering bugs, refine a few rough UI edges, and finish two critical integrations: 1. Cashfree – wire up payment processing and subscription management so new users can pay and activate plans seamlessly inside the app. 2. GST Portal – connect through our chosen Suvidha provider, letting Indian businesses push GST returns directly from their dashboard. Scope of work • Frontend bug fixes and small UI polish (Supabase Auth flows, dashboard widgets, responsive tweaks). • Backend bug fixes in our Supabase functions,...

    $18 / hr Average bid
    $18 / hr การประมูลเฉลี่ย
    57 คำเสนอราคา
    Business Workflow Automation with Openclaw
    3 วัน left
    ยืนยันแล้ว

    I need an experienced automation specialist to take several of our day-to-day business processes and turn them into reliable, hands-free flows using Openclaw as the orchestration backbone.

    $8 / hr Average bid
    $8 / hr การประมูลเฉลี่ย
    45 คำเสนอราคา

    Both of my access-control platforms—System A (Suprema's Biostar X) and System B (dormakaba's Matrix Professional)—sit on the same Windows server and share a local MS SQL instance. Each exposes a REST API, yet today they operate in silos. I need a seamless, bi-directional integration so that any change to a person or employee record in one system is reflected in the other almost instantly. Scope of the sync • Core identity fields: name and unique ID • Credential data: RFID card number and state • Biometric assets: fingerprint templates • Media: profile picture • Security attributes: access-level permissions Key requirements 1. Real-time operation (sub-second latency acceptable). 2. Conflict-resolution logic—latest change...

    $261 Average bid
    $261 การประมูลเฉลี่ย
    34 คำเสนอราคา

    I’m building a new service and need a Python-based backend that exposes a clean, well-structured RESTful API. The priority right now is user authentication—registration, login, token refresh, and secure password handling—so the code should follow best practices (hashing, HTTPS-ready, rate limiting, etc.). Here’s what I expect: • A lightweight framework such as FastAPI, Flask, or Django REST Framework—feel free to pick whichever you’re most comfortable with, as long as it stays modular and easy to scale. • Well-named endpoints returning JSON, with meaningful HTTP status codes. • JWT or OAuth2 implementation for auth, plus logout / token blacklist logic. • Unit tests and simple Postman (or similar) collection so I can verify eac...

    $450 Average bid
    $450 การประมูลเฉลี่ย
    182 คำเสนอราคา

    I have a WordPress website with WooCommerce installed, where I sell both products and services. I want to develop an Android mobile application that works directly with my existing website as the backend. The app should fetch all data (products, services, user accounts, orders, etc.) from my WordPress WooCommerce setup using REST API. Important Requirement: I do NOT want any separate backend or additional hosting. The app must be fully connected to my existing WordPress + WooCommerce system and use it as the only backend. Main Features Needed: App should load data directly from my website Product & Service listing (from WooCommerce) User login / registration (connected to WordPress users) My Account section (orders, profile, etc.) Checkout integration (WooCommerce-based) App should...

    $16 Average bid
    $16 การประมูลเฉลี่ย
    20 คำเสนอราคา
    Sleek iOS GPS Tracking App
    2 วัน left
    ยืนยันแล้ว

    I need a brand-new iPhone application that taps into the same REST/JSON API my current Android tracker already uses. The core features must mirror the web platform’s capabilities: real-time location tracking, instant push notifications when events occur, and reliable geofencing alerts. While the data flow and logic can follow the Android build, the look and feel should not. I’m aiming for a professional, sleek interface that feels perfectly at home on iOS—clean typography, smooth animations, and thoughtful use of native components. You’re free to rethink layouts, navigation, and colour palette as long as the result remains elegant and intuitive. I will provide: • Full API documentation and keys • The Android source code for reference • Wir...

    $112 Average bid
    $112 การประมูลเฉลี่ย
    28 คำเสนอราคา

    I want to release a lightweight companion app for eFootball fans that runs natively on Android and focuses exclusively on rich player profiles and performance stats. The goal is a smooth, modern experience where users can browse, search, and favourite players, then dive into up-to-date attributes, season numbers, and historical records. You will handle the complete Android app development cycle: coding the UI in Kotlin or Java through Android Studio, wiring it to the data source I provide (JSON/CSV or a simple REST API), and packaging a signed APK ready for the Play Store. Clean architecture, material-style design, and efficient local caching are important so lists feel instant even on mid-range devices. Deliverables • Fully functional Android APK • Complete, well-commented s...

    $20 / hr Average bid
    $20 / hr การประมูลเฉลี่ย
    114 คำเสนอราคา

    I'm looking for an experienced developer to integrate a REST API using Make. The primary function of this API will be data retrieval from a database. Key Requirements: - Set up API and webhooks through Make - Retrieve data from specified database - Ensure smooth and efficient data flow Ideal Skills and Experience: - Strong experience with REST APIs - Proficiency in Make - Database management and integration skills - Problem-solving and debugging expertise Looking forward to your proposals!

    $34 / hr Average bid
    $34 / hr การประมูลเฉลี่ย
    66 คำเสนอราคา

    I need a full-stack, SaaS-ready solution that lets residents, committee/admin members and security guards handle all daily society tasks from their phones while I oversee everything from a web dashboard. Core workflow • Users sign in with mobile-number OTP and see only the screens tied to their role (Resident, Admin, Guard). • The mobile build must run smoothly on both iOS and Android, using a single codebase if that speeds things up. • A clean top navigation bar should guide every screen transition. Key modules Visitor Management – residents can pre-approve guests; guards simply scan/enter details at arrival and departure; both sides get immediate status updates. Complaints – residents file an issue, watch it move from Open → In Progress → ...

    $298 Average bid
    $298 การประมูลเฉลี่ย
    38 คำเสนอราคา

    I’m taking a full-stack web application from concept to production and the most pressing piece right now is the backend. I want the core logic, data layer, and secure user flow rock-solid before I refine the rest of the stack. Here’s what I need you to build: • Authentication system – token-based, secure password handling, social login ready if possible • Admin panel – role management, CRUD operations, clear metrics view • Dashboard – REST-driven endpoints feeding charts/tables that can be consumed by my React frontend I’m comfortable running both Django and Flask in the same ecosystem, so feel free to leverage Django’s batteries-included features where they shine and drop into lightweight Flask micro-services when speed or is...

    $6 / hr Average bid
    $6 / hr การประมูลเฉลี่ย
    51 คำเสนอราคา

    I need a web-based dashboard that lets me monitor core business analytics at a glance. The focus is on clear, responsive charts and graphs that track two critical metrics: sales performance and website traffic. The data will come from sources I can expose through REST APIs or flat files, so the build should accommodate both. I’m open to the charting library you prefer—whether that’s D3.js, , Highcharts, or another modern JavaScript option—so long as the visuals load quickly and can be filtered by date range, product line, and traffic channel without page refreshes. Please structure the project so future datasets can be plugged in with minimal code changes. A lightweight admin panel or straightforward config file approach is fine; I just don’t want to wad...

    $10 / hr Average bid
    $10 / hr การประมูลเฉลี่ย
    43 คำเสนอราคา
    Laravel REST API
    1 วัน left

    I am a Laravel developer and I offer a complete REST API development service. I will build a fully functional Laravel API with CRUD operations and a secure authentication system for your application. This service is ideal if you need a ready-to-use backend that can be connected to any web or mobile application. What I offer: Complete Laravel REST API development Full CRUD operations (Create, Read, Update, Delete) Secure authentication system (Laravel Sanctum or JWT) User registration and login system Token-based protected routes Input validation and error handling Clean, structured and maintainable code Database migrations included Production-ready API This service is perfect for: Web applications Mobile apps (Flutter / React Native) Admin dashboards SaaS projects Price: $20 (Fixed Pric...

    $26 Average bid
    $26 การประมูลเฉลี่ย
    65 คำเสนอราคา

    I already have a pre-approved promotional template and a list of phone numbers sitting in Google Sheets. What I need is a clean Google Apps Script (or small set of scripts) that connects to WhatsApp Cloud API, authenticates with my Meta token, and fires that single template message to every number in the sheet. Scope of work • Authorise the script with WhatsApp Cloud API, store the access token securely, and handle refresh logic. • Build a simple menu item or button inside the Sheet so I can trigger the send on demand. • Read numbers from a designated column, batch the calls to respect WhatsApp rate limits, and log success / failure back into the sheet in real time. • Provide clear setup instructions so I can reuse or copy the script to other sheets later. Accep...

    $18 Average bid
    $18 การประมูลเฉลี่ย
    28 คำเสนอราคา

    Project Overview We are looking for an experienced Salesforce Service Cloud Consultant to help shape and scale a modern, data-driven Customer Service organization within a dynamic eCommerce environment. The focus of this role goes beyond standard configuration. You will actively design and implement a scalable and reliable service architecture, enabling efficient case handling, intelligent routing, and measurable service performance. You will work closely with business and product stakeholders to evolve Customer Service into a high-performing, insight-driven function. Responsibilities Design and implement a modern Service Cloud architecture aligned with scalable Customer Service operations Translate business needs into efficient, automated service processes with a strong focus ...

    $49 / hr Average bid
    $49 / hr การประมูลเฉลี่ย
    64 คำเสนอราคา
    Android Bike & Scooty Service App
    22 ชั่วโมง left

    I need an Android application that lets customers schedule at-home servicing for both bikes and scooties in just a few taps. The single must-have feature for this first release is a smooth, location-aware booking flow: the user opens the app, grants GPS permission, selects bike or scooty, picks a service slot and confirms. No real-time tracking or payment gateway is required at this stage—capturing the booking details and pushing them to my team is enough. A modern Material-style interface, compatibility with recent Android versions and fast load times are important to me. Feel free to use Kotlin with Jetpack components or another current stack that keeps maintenance simple. A lightweight back-end (Firebase, Supabase, or a small REST API) is fine as long as bookings reach an admin d...

    $344 Average bid
    $344 การประมูลเฉลี่ย
    45 คำเสนอราคา
    Backend-Integration SaaS-Plattform – Oracle & DocuWare
    15 ชั่วโมง left
    ยืนยันแล้ว

    Ausschreibung: Backend-Integration SaaS-Plattform – Oracle & DocuWare (On-Prem) Wir sind ein deutsches SaaS-Startup und bereiten aktuell die erste Enterprise-Integration unserer Plattform vor. Unser erster Zielkunde betreibt seine gesamte IT-Infrastruktur On-Prem mit zwei Kernsystemen: - Oracle-Datenbank – Stammdaten - DocuWare – Dokumenten-Management-System Wir suchen einen erfahrenen Freelancer, der uns dabei hilft, eine minimale, lesende Anbindung dieser beiden Systeme an unsere Cloud-Plattform ( / Supabase / Vercel) zu konzipieren und umzusetzen. Was wir uns vorstellen: - Read-only-Zugriff auf Oracle (JDBC, ORDS/APEX oder Staging-Schema) - Zugriff auf DocuWare-Dokumente via REST API (ContentServer API) - Nightly Delta-Sync oder On-Demand-Pull – je nach ...

    $19 / hr Average bid
    $19 / hr การประมูลเฉลี่ย
    75 คำเสนอราคา

    We are looking for an experienced full-stack developer (or small team) based in Hyderabad to design and develop a high-quality, scalable web and mobile application platform. The platform will function as a discovery and booking marketplace, enabling users to search, compare, and connect with relevant service providers through structured profiles, search filters, and booking functionality. The concept is broadly similar to a fitness discovery and booking platform, but detailed functional requirements will be shared only with shortlisted candidates after NDA. We are looking for a developer who can build a production-ready, scalable architecture using modern technologies similar to those used by leading platforms such as Urban Company, Airbnb, Zomato, Practo, etc. Preference will be given...

    $489 Average bid
    $489 การประมูลเฉลี่ย
    61 คำเสนอราคา
    WooCommerce-ProgressionLIVE Sync Plugin
    6 ชั่วโมง left
    ยืนยันแล้ว

    I need a custom WordPress plugin that connects my WooCommerce store to the ProgressionLIVE logistics platform through their public API. The goal is to keep both systems perfectly aligned and to let my customers see live delivery updates without any manual work from my team. Core requirements • Automatically push new WooCommerce orders (including customer details and all order information) to ProgressionLIVE as soon as they are placed. • Pull inventory changes from ProgressionLIVE back into WooCommerce so stock levels remain accurate. • Receive real-time status callbacks from ProgressionLIVE and update each WooCommerce order’s “Order notes” and status accordingly (processing, dispatched, in-transit, delivered, etc.). Technical pointers • Wor...

    $496 Average bid
    $496 การประมูลเฉลี่ย
    244 คำเสนอราคา

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