Solidity Jobs

Here is what we are looking at: We have an existing token (GrokFANS) on the BNB Smart Chain with a built-in 30% tax protocol. We need a DApp that automates and visualizes our multi-tier referral rewards (10% for Builders, 5% for Leaders). The Task: Build a high-performance, mobile-responsive Dashboard (optimized for Trust Wallet) where our users can: Connect their wallets. Generate unique referral links. Track their "Builder" and "Leader" rewards in GrokFANS Tokens. View a "Tree" of the holders they have onboarded. Technical Requirements: Frontend: React.js / with Tailwind CSS. Web3: or Web3.js. Smart Contract: Integration with our existing BSC contract (Solidity). Backend: A lightweight database (Supabase or Firebase) to map referral links to wal...

I’m building an automated model that scans Solidity code on the Ethereum network and flags three critical weaknesses—reentrancy, arithmetic overflow/underflow, and access-control flaws. What I need from you is a working detection engine: it can be rule-based, machine-learning, formal-verification driven, or a hybrid, as long as it reliably pinpoints those issues in typical ERC-20/721 style contracts and produces a clear, human-readable report. I’ll provide sample contracts (both vulnerable and safe) so you can tune precision and recall; feel free to augment with publicly available datasets such as SWC Registry examples. Because this is Ethereum-only work, please focus on Solidity syntax quirks, common library usage (OpenZeppelin), and the nuances of the EVM. If you le...

i want someone who can help me listing my token on decentralized exchange like coingecko coin market cap my token is on tron blockchain

I’m spearheading a new B2B payments rail that lets African businesses move seamlessly between crypto and local fiat. The immediate milestone is a production-grade, multi-chain wallet layer covering BTC, ETH, SOL and stable-coins such as USDT/USDC across ERC-20, TRC-20 and BEP-20. , Solidity or Rust will be your main playground because some smart-contract glue code and low-level services will emerge as we scale. Core wallet requirements • Cross-chain transactions that feel instantaneous to the end user • True multi-currency balances under one address book • Enhanced security: MPC architecture reinforced with two-factor authentication by default and biometric verification for high-value flows. Beyond the wallet, you’ll own the crypto ↔ fiat on/off-ramp ...

I am seeking an expert to assist in listing my token on decentralized exchanges such as CoinGecko and Coin Market Cap. The token is currently on the Tron blockchain. The ideal candidate will have experience in cryptocurrency and blockchain, specifically with Tron, and be able to navigate the process of listing tokens on popular platforms.

My FastAPI-powered backend has started failing under load: some requests crash outright while others return inconsistent data. All problem routes interact heavily with our database layer, so I suspect the issue sits somewhere between the ORM and the request handlers, but I need an experienced set of eyes to confirm and patch it. Here is what I need from you within the next six hours: • Pinpoint the exact cause of the crashes and inconsistent responses • Implement a clean, tested fix so every endpoint behaves predictably again • Provide a concise write-up explaining what went wrong and how you resolved it You’ll be debugging a Python 3.x + FastAPI codebase that uses standard logging and REST conventions. If additional tooling—pdb, ipdb, pytest, or any profi...

I am building a tokenized residential time-share marketplace where each NFT represents a fractional, 1 day-based stake in a property. Holders must be able to exercise real ownership rights, so the core of the job is the smart-contract logic and the platform layer that sits on top of it. Key objectives • Mint ERC-721 or ERC-1155 tokens that map precisely to calendar slots and legally compliant ownership records. • Provide on-chain voting and decision-making functions (think DAO-style proposals for repairs, upgrades, management, etc.). • Enable seamless peer-to-peer ownership transfers, with automated updates to the cap-table and usage calendar. Front-end needs A clean, mobile-responsive dashboard where users can: – view token holdings, upcoming usage windows, an...

I’m building a new Ethereum-based protocol and need an experienced Solidity engineer to own the entire on-chain side. The contract suite must seamlessly handle deposits, payouts, detailed package/accounting logic, and enforce lifecycle rules—every one of these functions is equally critical to the project’s success. Gas optimisation is my top security priority. I expect custom errors, efficient storage patterns, and tight arithmetic that still protects against re-entrancy and rounding pitfalls. You will design a multi-contract architecture, write clean modular code, and keep NatSpec comments and interface docs current so my frontend developer can integrate without friction. You choose the stack—Hardhat, Foundry, or Truffle—so long as you ship a repeatable d...

BUDGET; 150 CAD, OUTSOURCING, SEE CODE ATTACHED I’m looking for an experienced blockchain developer to review, debug, and fully fix an existing codebase involving advanced DeFi mechanisms, including flash loans and a custom “flash bets” system integrated with ultra-fast, short-resolution markets. Project Context This system is designed to interact with instant-resolution betting markets and prediction markets, where outcomes resolve in seconds. The strategy focuses on arbitrage opportunities where pricing inefficiencies allow for risk-minimized profit when executed correctly and atomically. Important: The current system is not functioning correctly, and part of this job is to identify why (especially flash loans failing) and ensure everything works end-to-end in real...

BUDGET; 150 CAD; OUTSOURCING; SEE CODE ATTACHED I’m looking for an experienced blockchain developer to review, debug, and fully fix an existing codebase involving advanced DeFi mechanisms, including flash loans and a custom “flash bets” system integrated with ultra-fast, short-resolution markets. Project Context This system is designed to interact with instant-resolution betting markets and prediction markets, where outcomes resolve in seconds. The strategy focuses on arbitrage opportunities where pricing inefficiencies allow for risk-minimized profit when executed correctly and atomically. ⚠️ Important: The current system is not functioning correctly, and part of this job is to identify why (especially flash loans failing) and ensure everything works end-to-end in re...

The project centers on a full-featured NFT marketplace that handles everything from minting to secondary sales and timed auctions. I need the underlying smart contracts as well as an intuitive web interface so users can create, list, bid on, and transfer tokens representing real-world and digital assets. Core scope • Solidity smart contracts following ERC-721/1155 standards, plus auction and royalty logic • Integration with a tokenized real-world asset framework so off-chain metadata and compliance checks stay in sync with on-chain events • Front-end built with React, or similar, connected by or • IPFS or comparable decentralized storage for metadata and media files • Deployment scripts and basic CI to push to testnet and mainnet Deliverables 1. Au...

The project centers on a full-featured NFT marketplace that handles everything from minting to secondary sales and timed auctions. I need the underlying smart contracts as well as an intuitive web interface so users can create, list, bid on, and transfer tokens representing real-world and digital assets. Core scope • Solidity smart contracts following ERC-721/1155 standards, plus auction and royalty logic • Integration with a tokenized real-world asset framework so off-chain metadata and compliance checks stay in sync with on-chain events • Front-end built with React, or similar, connected by or • IPFS or comparable decentralized storage for metadata and media files • Deployment scripts and basic CI to push to testnet and mainnet Deliverables 1. Au...