Blockchain Jobs

I need a comprehensive guide on tracking individual address transactions using Etherscan. The guide should include: - Step-by-step instructions on accessing and using Etherscan for transaction tracking. - Detailed explanation of how to extract specific information: sender and recipient addresses, ETH value, gas fees, and timestamps. - Tips for navigating the platform efficiently. Ideal Skills & Experience: - Proficiency in using Etherscan. - Strong understanding of Ethereum transactions. - Ability to create clear, concise instructional content.

We are looking for a developer experienced in Solana/DeFi to build a simple Decentralized Exchange (DEX), similar to an Automated Market Maker (AMM) like Raydium. The goal is to develop a functional MVP with the following essential requirements: Key Requirements: 1. Solana Network: On-chain programs (smart contracts) must run on the Solana blockchain. 2. Use of SPL Tokens: The DEX must use SPL tokens for the base token and for the quote tokens. 3. Creation of Liquidity Pools (LP): Ability to create multiple pools between the base token and different quote tokens. An implementation that minimizes the cost of creating LPs (deployment, accounts, storage) is preferred. We are seeking an experienced Solana/DeFi developer to build a simple Decentralized Exchange (DEX), similar to Raydium. 4...

My current build revolves around end-to-end smart-contract work in Solidity, and I need it handled as a full-time commitment. The effort is strictly centred on smart contract development rather than a broader dApp or token launch, and I want every stage covered—from first architecture draft to post-deployment upkeep. Scope at a glance • Designing smart contracts that meet agreed functional specs and follow industry security practices • Testing and auditing those contracts with unit, integration, and security tools to reach high coverage and pass a formal review • Deploying the code to the chosen network(s) and maintaining it afterward, including upgrades, monitoring, and quick patching where needed Deliverables are accepted only when each contract is: fully d...

Freelancer Job Posting – Blockchain-Based Recycling Reward System Project Title: Blockchain-Based Recycling Reward Application (Mobile App + Backend + Token Development) Project Description I am building a startup focused on environmental sustainability. The goal is to create a mobile application that rewards users with a crypto token whenever they recycle bottles using supermarket “Reverse Vending Machines” (RVM) commonly used in Europe. After returning bottles, the RVM provides a QR code. The user scans this QR code inside the mobile app and instantly receives tokens in their in-app wallet. These tokens can later be used in an eco-friendly marketplace inside the app. I am looking for an experienced developer or team to build the complete system (mobile app, backen...

We are looking for skilled Alpha Testers and Community Moderators to join our early-stage Web3/GameFi project JUDAS. What needs to be done Your task is to help us improve the game during the Alpha phase by: actively playing the game identifying bugs, issues, and inconsistencies reporting errors in a clear, structured format suggesting improvements for gameplay, UI/UX, and balance providing general feedback on the user experience helping us stress-test all core mechanics For moderators: managing player communication maintaining order in community channels answering basic questions escalating important issues to the team supporting players during the alpha period About the project JUDAS is a dark, decision-driven GameFi experience built around risk, choice, and consequence. T...

Hiring: Web3 Marketing Team for Token Launch — BEP-20 Launch on BSC We are preparing to launch our token, a BEP-20 token on Binance Smart Chain, with smart contracts and vesting already completed. Our dApp + GemPad presale page are in final development stages, and we are now looking for a professional Web3 marketing partner to manage the full launch cycle. This is not a “shill spam” job — we need a real team with experience, strategy, and execution. About the Project Token: V TOKEN Chain: BSC (BEP-20) Launch Flow: GemPad Presale → DEX Listing Positioning: User-friendly DeFi product 0% tax at launch Strong anti-bot protection Heavy long-term marketing allocation (40%) Utilities and roadmap ready What We Need From Your Team 1. Full Marketing Strategy & Ex...

About the Project We are building a Decentralized Exchange (DEX) MVP designed to support fast, secure, and scalable crypto trading. This platform will include core DEX functionality such as wallet integration, token swaps, liquidity management, user dashboards, and real-time data feeds. We are seeking an exceptional Senior MERN Stack Engineer with strong blockchain experience to lead the development of the MVP from the ground up. Role Overview As the Senior MERN Stack Engineer, you will be responsible for architecting and implementing the entire web application stack. You will collaborate closely with blockchain engineers, product stakeholders, and designers to deliver a high-quality, production-ready MVP. You should have deep experience building performant, secure applications and be h...

Whisper Ledger will be a purpose-built platform whose sole aim is wealth invisibility. Every feature must preserve the privacy of financial transactions, ensure assets can be hidden when required, and keep investments completely anonymous. To achieve that I want three layers of capability working together: • End-to-end encrypted communications so no message, transaction note, or metadata can be read in transit or at rest. • Deep obfuscation techniques—mix-nets, ring signatures, zero-knowledge proofs, or similarly strong approaches—to break any on-chain or off-chain traceability. • A private asset-tracking module that reconciles balances and positions for the account holder only, never leaking holdings or addresses. The build should cover the high-level arch...

I’m about to move a specific amount of BNB into an investment vehicle and want an experienced Binance Smart Chain user beside me to make sure the funds arrive safely. My wallet is already live, so there’s no setup work—what I need is real-time guidance, eyes on the details, and confidence that every step is done correctly. Here’s what I’d like from you: • A quick call or chat to verify my existing wallet configuration and network settings (MetaMask/Trust Wallet on desktop). • Real-time coaching while I send the BNB: double-check the recipient address, advise on an optimal gas fee, and confirm whether a memo tag is required. • Immediate confirmation that the transaction is recorded on BscScan, plus a short security review to be sure my priva...

I’m building a Binance Smart Chain project that needs a rock-solid smart-contract backbone and a lightweight web/API layer around it. The scope is clear and end-to-end: Token & Core Contracts • Standard OpenZeppelin-based ERC-20 with a fixed 10 M supply. • Owner-only mint, public burn, pausability, and the usual transfer/transfer From hooks. • Ownership must be upgrade-friendly; the initial owner will be a multisig we configure later. Multi-Phase Sale Logic Eight sale phases, each with its own price and supply cap. A single buy() entry point has to accept both on-chain crypto and a bank-card rail (Stripe, Transak, or any proven provider you have used before). Phase limits must enforce caps at the contract level. Three-Level Affiliate System Users gener...

I am looking for an expert developer to build a highly advanced mobile cryptocurrency trading application for iOS and Android. The app must operate with maximum accuracy, integrate with multiple exchanges (MEXC, Binance, and others), and allow trading on one platform or multiple platforms simultaneously based on my selection. The app must support all trading pairs and all order types available on the exchanges, including Market, Limit, Maker, Spot, and more. Maker orders must never auto-convert into Market under any circumstances. The system must support all timeframes, from seconds up to yearly. ⸻ Core Features Required 1. Multi-Exchange Integration • Full integration with MEXC, Binance, and other platforms. • Ability to trade on one or multiple exchanges at the same time....

Hello I’m in the final stretch of launching an ICO/IDO/DEX and now need a seasoned blockchain developer to complete the platform-side integration with Binance Smart Chain (BSC). All core smart contracts are written and audited; what remains is wiring everything into a seamless, production-ready experience on BSC so users can purchase, swap, and stake the token without friction. Scope • Connect the existing Solidity contracts to our React/ front end through • Configure PancakeSwap liquidity pools, farm, and staking interfaces so they surface correctly in our dApp. • Set up BSC node endpoints, event listeners, and transaction handling to keep on-chain and off-chain data in sync. • Deploy final contracts with Hardhat/Truffle scripts, verify them on BscSca...

I’m working on a project called Infinity Force — it’s an NFT marketplace platform that’s already in the MVP stage. The base version is done, but it still needs a lot of polish and final touches to get it ready for launch. I had one developer working on it, but honestly, his skill level was too junior for what this project needs, so we had to part ways. Now I’m looking for a strong blockchain/full-stack dev who can pick up where things left off and finish the job right. The MVP is already working — users can mint, list, buy, and sell NFTs. Wallet connections (MetaMask, WalletConnect) are in place, and the UI is built in React / Next.js. But I still need help improving smart contracts, cleaning up the backend, fixing bugs, and getting everything ready for ...

Hello We are building a decentralized exchange on Binance Smart Chain and need a senior engineer to take full ownership of the web client and its smart-contract hooks. The platform will offer token swapping, liquidity pools, and staking from day one, so the codebase must be modular and production-ready. The frontend stack is React complemented by Redux for state and Material-UI for the component layer. You’ll connect wallets (MetaMask, WalletConnect, etc.), surface real-time pool data, and wire every action to the underlying contracts. If you’re comfortable refining or extending the Solidity, even better—we can iterate together on the AMM logic for optimum gas efficiency. Deliverables • Responsive React interface with swap, pool, and staking screens fully wired t...

I need an experienced Solidity developer to craft a production-ready ERC-721 smart contract that follows the latest OpenZeppelin standards and best security practices. The contract should compile cleanly with Solidity 0.8.x, be easily upgradeable or extensible, and keep gas costs in mind. While I will ultimately decide on the exact feature set during our discussion, the foundation must include the core ERC-721 logic plus room for optional extensions such as metadata, enumerability, royalty support, and pausable or burnable functionality. Clear, well-commented code and unit tests (Hardhat or Foundry preferred) are essential so I can audit and maintain the project long term. Deliverables I expect: • Complete Solidity source code with import paths pinned to specific OpenZeppelin ...

I need a single, end-to-end solution that lets users explore coins, mint NFTs, and trade seamlessly on both desktop and mobile. The core stack should run on an Ubuntu server and include: • Blockchain explorer pages that surface live transaction, address, and token data. • An NFT minting module that lets creators launch collections in a few clicks. • A marketplace supporting Buy/Sell/Listing and Auction capabilities, inspired by the fast flow of Pump.fun. • Integration with Ethereum and Binance Smart Chain, with room to expand later. • Coin and DEX tools so users can swap, trade, and add liquidity without leaving the site—think Uniswap/PancakeSwap style functionality. • Smart-contract deployment for new ERC-20 and BEB20 tokens, including contra...

I am in need of an expert algorithm developer. The primary goal of this algorithm will be to ensure maximum accuracy.

I’m steering the build-out of an all-in-one DeFi application that merges chat, social feeds, and trading under strict privacy safeguards, and I now need a project manager who lives and breathes community-driven product management. Your north star will be user engagement and growth: translating the voice of our community into actionable sprints while keeping every cross-functional team—engineering, design, tokenomics, and compliance—moving in lockstep. Day to day, you’ll map clear roadmaps, run agile ceremonies, maintain a live metric dashboard, and own stakeholder comms. Social media channels and in-app interactions are our primary engagement arenas, so you’ll design feedback loops, AMAs, and feature roll-outs that spark conversation and retention there. DeFi...

Full-Stack Web3 Developer Needed for Dashboard + Swap + Web3 Integration Upgrade We have an existing crypto intelligence dashboard that tracks whale activity, on-chain transactions, token data, and trading patterns on Solana. The platform is fully functional with a complete backend, frontend, and detailed handover notes from the previous developer. We now want to enhance the dashboard with new UI improvements and Web3 features: Wallet connection Integrated swap module Buy/Sell card on each transaction Notification panel General UI/UX improvements You will be working on an established codebase with clear documentation. Scope of Work 1️⃣ UI/UX Improvements Update dashboard layout Improve card spacing, typography, responsiveness Add quick filters (Snipers / High Conviction / New Coins / Low ...

My Solana-based trading bot has suddenly started throwing on-chain errors every time it tries to execute a swap—whether it’s a buy or a sell. The transaction reaches “finalized (MAX confirmations)” but then fails with: • Instruction #6 Failed – custom program error: 6001 • Instruction #3 Failed – custom program error: 6024 These appear only when the bot calls the JUT route to purchase or liquidate a token, so I suspect an issue in my program logic, CPI call, or account constraints rather than network congestion. All other steps (signature, fee payer, funding) clear without issues. What I need from you 1. Pinpoint the root cause of errors 6001 and 6024 inside the Solana program. 2. Patch the code so the bot completes both buy and se...

I’m ready to launch a custom ERC-20 token on Ethereum and need a smart-contract specialist to take it from concept to deployment. The core contract must follow the standard interface, include a reliable pausable-transfer switch for emergency stops, and interact seamlessly with the official USDT contract so users can withdraw their balances in tether whenever they choose. Here’s what I’m hoping to receive: • A clean, well-commented ERC-20 Solidity contract that compiles without warnings in the latest stable version of OpenZeppelin. • A pausable mechanism wired into transfer, transferFrom, and approve, controlled only by the owner. • Functions that pull USDT from the contract and send it to a user address, paying careful attention to decimals and re-en...

I have an integrated ecosystem made up of a WordPress/React web portal, a Flutter mobile app, a Python-based AI automation agent, and a lightweight blockchain utility used for token transfers and gas estimation. Each layer is suffering from production-blocking bugs and I need them resolved in a single, coordinated sprint so the entire stack can go live again. Here is the current situation: • Web portal – calls to several REST endpoints now fail, which breaks user search and any page that relies on that data. • Mobile application – the latest Flutter build throws errors during compilation and, once running, no longer maintains real-time data sync with the backend. • AI agent – Python workflow hangs on long-running tasks, timing out before it triggers the n...

We are looking for a professional Full-Stack Developer experienced in integrating Tatum API for On-Ramp / Off-Ramp crypto systems. Our platform acts as a direct gateway between local currency and crypto. We do not provide custodial wallets or store user balances. Developer Requirements: Frontend: Vue.js, Tailwind CSS Backend: Node.js, , MongoDB a unique deposit address per Off-Ramp request using Tatum Deposit Address / Virtual Accounts API. Transaction Broadcast API to send crypto from the main wallet to users (On-Ramp). *Implement Auto Sweep to move all received funds to our main wallet. *Use Transaction Broadcast API to send crypto from the main wallet to users (On-Ramp). *Implement Webhooks and display all transaction notifications and confirmations inside our platform’...

Proyecto Completo: Juego 3D Futurista + Ecosistema Crypto – “Grow & Glow Racing” Descripción General Busco un equipo o desarrollador senior capaz de crear un videojuego completo desde cero, incluyendo diseño, programación, arte, blockchain, token, marketplace y página web. El proyecto es un juego 3D futurista de carreras, con estética cyberpunk/neon, donde los jugadores esquivan edificios y recorren una ciudad avanzada. Todo el ecosistema estará integrado con tecnología blockchain (token propio, marketplace, preventas, contratos, recompensas PVE/PVP, etc.). Características Principales del Juego 1. modo PVE 2. Modo PVP 3. Ranking & Torneos Ranking diario, semanal y mensual. Torneos con premios acumulados....

I need an end-to-end build of an AI-driven crypto platform that combines predictive analytics with fully automated trading. The system must run smoothly on web, mobile, and desktop, while interacting in real time with Ethereum, Bitcoin, and Binance Smart Chain networks. Core requirements • AI engine: ingest market data, generate price predictions, and continuously learn from new inputs. • Trading automation: execute strategies 24/7 with adjustable risk and position sizing, plus fail-safe controls for extreme volatility. • Unified interface: one codebase feeding a responsive web app, native-feeling iOS/Android apps, and a lightweight desktop client. • Blockchain connectivity: wallet management, on-chain order routing, and secure key storage for ETH, BTC, and BSC...

We are looking for an experienced Web3/Blockchain Engineer to help us build decentralized applications. Candidate should have hands-on experience with Ethereum or other EVM-compatible chains, Solidity, Cryptocurrency, Swapping and Web3 tools.

We are seeking a skilled developer to update our existing cryptocurrency and NFT marketplace project. The ideal candidate will have experience in blockchain technology, smart contracts, and user interface enhancement. Your responsibilities will include implementing new features, optimizing functionality, and ensuring an intuitive user experience. If you're passionate about cryptocurrency and have a proven track record in similar projects, we would love to hear from you!

I’m extending a data–protection dApp on the XRP Ledger and need a blockchain developer to finish the core security layer. I will share more detail if you have XRP ledger experience. When apply, please show me your past projects.

I’m expanding my portfolio beyond Bitcoin and Ethereum and need someone fluent in the fast-moving world of other altcoins. Your role is to answer my questions in plain English, explain how each project works under the hood (tokenomics, consensus, roadmap, utility), and help me spot red-flags before I commit any capital. What I expect from you • A live voice or video session (≈60 min) where I can run through a list of coins I’m researching. • A concise follow-up note summarising key points: market position, competitive edge, risks, and any on-chain metrics or news worth tracking. If you routinely analyse lesser-known tokens, read white-papers, and keep tabs on DeFi launches, your insight will be invaluable. Please mention a couple of altcoins you curren...

NewHeaven Ecosystem — Phase 1 (1-Week MVP) Project Type: Blockchain / Web3 / Full-Stack Deployment Duration: 1 Week Location: Remote / Global Compensation: Equity: 0.5%–2% (milestone-based, Founding Developer recognition) Token Allocation: 2%–5% of Phase 1 NHT pool (vested, released monthly) Monthly Stipend: $150–$200/month (starts 2 weeks post-mainnet launch) --- Project Overview Phase 1 aims to deploy and validate the full core MVP system within 1 week. Core Components: zk-STARK privacy layer ERC-5115 NewHeaven ID ERC-721 Profile NFTs Social-layer backend (posts, follows, comments, notifications via ) Front-end integration for onboarding and test users > All core contracts and modules are pre-built. The developer’s role is to deploy, c...

I'm looking to develop a mobile gaming app for both iOS and Android platforms. The app will combine elements of card games, coin flipping, and cryptocurrency integration. Key Features: - A variety of card games - Coin flipping mechanics - Secure cryptocurrency transactions and wallet integration Ideal Skills and Experience: - Mobile app development for iOS and Android - Experience with cryptocurrency integration - Strong background in game development, particularly with card games - Familiarity with secure payment systems and blockchain technology Please provide examples of previous work in your bids. Looking forward to your proposals!

Hi, I’m Tony Tan. I’m looking for a skilled developer who can help implement my blockchain-based land registration platform — designed to bring transparency and efficiency to property management across Africa and South America. Our platform ensures transparency, trust, and efficiency in every transaction, solving long-standing challenges in property verification and ownership disputes. Key Features: Dedicated Portals for SuperAdmin and Admin to manage operations securely. Quick Ownership Check – property owners can instantly verify and view their land details. Smart Property Search – find land using survey numbers with precise blockchain-backed data. Instant Land Listing – make property available for sale with just one click. Request System –...

NFT üretimine odaklanan, uçtan uca çalışan bir web platformu yazdırmak istiyorum. Kullanıcılar kolay bir arayüz üzerinden kendi NFT’lerini sıfırdan tasarlayıp mint edebilmeli, ardından satışa çıkarabilmeli ve toplulukla etkileşime geçebilmeliler. İhtiyacım olan temel modüller: • Özelleştirilmiş NFT oluşturma araçları – görsel yükleme, metaveri düzenleme, mint işlemi, telif oranı belirleme. • Pazarlama ve satış destek araçları – listeleme, promosyon kuponu, açık artırma ve sabit fiyat seçenekleri, temel analitik panelleri. • Topluluk özellikleri ve forumlar – koleksiyon sahiplerinin içerik paylaşacağı, güncellemeler yayınlayacağı so...

I already have a live Solidity swap contract paired with its own ERC-20 token. Before I push the next release, I need an experienced smart-contract developer to jump in, modify the existing swap logic, and make sure both contracts work seamlessly together. The core tasks are: • Update and expand current functionality – I have a short list of new features to add, plus a few existing functions that need refinement for better UX and gas use. • Hunt down and fix the bugs that have shown up in testing and on-chain analytics. • Refactor any overlapping code in the token contract so it remains fully compatible with the refreshed swap contract. I’ll provide the current repos, unit tests, and a changelog of desired upgrades. Deliverables are the updated Solidity fil...

We’re building a production-grade backend system for an OTC operation integrated with Binance P2P Merchant API, NPP (fiat payment rails), and Sumsub (KYC/KYB/AML). The system runs entirely in the backend, while all customer-facing interactions (ads, orders, chat, KYC screens) remain on Binance’s native front end. The goal is to automate order execution, payment settlement, KYC checks, and reconciliation — and make the system franchise/white-label ready for multi-tenant use. Objectives Automate OTC operations on Binance P2P via API (ads, pricing, orders, status). Automate fiat flows using NPP (inbound/outbound with reconciliation and retries). Automate identity/risk checks using Sumsub webhooks (L1/L2/L3 tiering, AML flags). Enable franchising: multi-tenant isolation, on...

I need a Telegram bot that acts as a secure escrow for peer-to-peer deals. Its only job is to handle transactions, and those transactions will be in cryptocurrency. The bot must accept deposits in Litecoin as well as USDT on the BEP-20, TRC-20 and ERC-20 networks, hold the funds safely, then release or refund them when both parties (or a moderator) give the appropriate command. Core flow: a buyer or seller calls /startescrow, the bot supplies deposit addresses, tracks on-chain confirmations, locks the funds, and waits for /release or /cancel. I also want an admin override for dispute resolution, automatic fee deduction, and clear status messages so no one is confused about where their coins are. Please build this with the official Telegram Bot API and reliable blockchain libraries (, tro...

I need a reliable seller who can transfer USDT to me today while I’m in the Delhi-Noida area. I’m specifically interested in buying, not selling or swapping, and would like the coins sent directly to my own Binance wallet (Trust Wallet works for me too, though Binance is easiest because I already use it). Here’s what I have in mind: • We agree on the INR-to-USDT rate and the exact amount. • I send payment in INR through any convenient local method we mutually trust (bank transfer, UPI, etc.). • You send the agreed USDT to my wallet address and share the transaction hash as proof. That’s it—straightforward and quick. Message me with the rate you can offer, the minimum/maximum you’re willing to trade, and your preferred payment cha...

I'm seeking an experienced blockchain developer to help with smart contract interactions and wallet recovery. Key Tasks: - Access legacy contracts on Ethereum, Binance Smart Chain, and Polygon. - Resolve gas estimation issues. Ideal Skills: - Strong understanding of legacy smart contracts. - Experience with secure, offline signing practices. - Proficiency in handling gas fees across multiple blockchains. Looking forward to your expertise!

I’m gearing up to build a production-ready set of smart contracts and need an experienced developer to bring the on-chain logic to life. The core of the assignment revolves around architecting, coding, and testing the contracts themselves; tokenomics, dApp front-end, and broader infrastructure are handled elsewhere. To streamline selection, I’d like to see concrete past work—live contracts, GitHub repos, audits, or anything that proves you’ve shipped secure Solidity code before. Please highlight any experience with Truffle, Hardhat, Foundry, or comparable frameworks, plus the security tools you rely on (Slither, MythX, Echidna, etc.). Gas optimization and adherence to current best practices (e.g., EIP-2535, OpenZeppelin upgradeable patterns) will weigh heavily in m...

I need a complete on-chain/off-chain set-up for a USD-pegged, fiat-collateralized stablecoin. On the Solidity side, I want an ERC-20 contract that keeps things simple: mint and burn functions gated to a custodian role, pause/unpause capability, and the usual events for transparency. Alongside the contract, I also need a lightweight Node.js back-end written with Ethers.js. Its job is to expose authenticated endpoints that let our internal treasury desk call “mint” when fresh dollars arrive and “redeem” when users cash out. A small SQLite or JSON store is fine for queuing and logging transactions; no heavy database work is required. Deliverables • Auditable Solidity contract (flattened and well-commented) • Hardhat project with unit tests covering mi...

I need a complete, production-ready cryptocurrency built on a private blockchain that reaches consensus through Practical Byzantine Fault Tolerance (PBFT). The scope starts with selecting or building the core ledger, moves through token definition, and ends with a running network that my team can operate behind our firewall. Because PBFT prioritises speed and deterministic finality, I expect node software that demonstrates low-latency block confirmation in a controlled environment. Docker-based deployment or a similarly portable setup is preferred so we can spin up multiple validator nodes quickly during testing. Deliverables • Source code for the ledger and consensus layer • Token specification (supply, decimals, fees) implemented in the chain logic • CLI or lightwe...

I’m launching an NFT initiative and need a legal scholar who can do more than write opinions—I want you to help me secure the intellectual property and outline the backbone of a small online legal platform that will manage all future matters. Here’s what I need from you: • Intellectual-property strategy tailored to NFTs. I’m especially interested in how to structure rights, licensing terms and resale-royalty language so my creative assets stay protected worldwide. • Practical guidance on “development of a legal platform.” Your job is to translate the IP framework you create into requirements for a simple web tool that lets me track matters, store documents and, above all, run a built-in case-management module. • Clear documentation. ...