Ethereum jobs

...execute those signals on a user’s behalf. The core requirement is an AI engine that analyses market data and applies a trend-following strategy, then places orders automatically through the Pocket Option exchange. The app must be available on iOS, Android and a responsive web dashboard, with a consistent UI across all three. Users need to switch easily between multiple time frames and trade pairs—Ethereum OTC is the priority, but the architecture should allow me to add further pairs later without major refactoring. Real-time streaming prices, secure API authentication, user account management, push notifications for every executed trade, and detailed trade logs are all essential. I also want an admin panel where I can adjust strategy parameters, set risk limits ...

I’m ready to launch a brand-new cryptocurrency with a fixed maximum supply of 10 billion coins and I don’t want to piggy-back on Ethereum, BSC or Polkadot—I need an independent chain built from the ground up. The core purpose of the coin is to power smart-contract execution, so the chain architecture, virtual machine and fee model all have to be optimized for that use-case. What I already have in mind • Tokenomics: 10 billion total supply, no more, no less. • A smart-contract–friendly environment that can rival EVM chains in speed and cost. • Room to evolve into DeFi utilities later on. Where I need your expertise I’m looking for end-to-end technical guidance and implementation: choosing or designing the right consensus layer, w...

I need a complete, production-ready Solidity script that mints a fully transferable Flash USDT token on BOTH Ethereum (ERC-20) and Tron (TRC-20). The contracts must deploy cleanly through Remix (for Ethereum) and the equivalent Tron IDE or Tron-Web flow, run for at least two to three months before self-destructing or freezing, and produce 100 % confirmed transactions that reach any standard wallet or major exchange without flagging. Core expectations • One Solidity file per chain, clearly commented, that compiles under the latest stable compiler versions. • Functions for minting, burning, and standard ERC-20/TRC-20 transfers. • Built-in logic that preserves liquidity long enough for a 2–3 month lifecycle, after which tokens become inert. • G...

...purchase without exposing them to intimidating order books. • Educational resources integrated right into the flow—tooltips, short videos, and concise articles that answer questions in context. • Instant buy/sell functionality so a beginner can move from fiat to crypto (and back) in just a few clicks. The exchange must handle a wide range of cryptocurrencies, not just the usual Bitcoin and Ethereum. A single wallet experience, clear balances, and responsive performance across web and mobile are critical. If you’ve previously designed secure exchange architectures—matching engines, hot-/cold-wallet management, KYC/AML workflows, and REST/WebSocket APIs—tell me how you would apply that expertise here. Mention any white-label frameworks or c...

I have a live DeFi DApp running on Ethereum and I need thirty real Web3 users to put it through its paces. Each tester must connect a wallet, complete several buy-and-sell transactions, explore every screen, then tell me exactly where the experience shines and where it breaks down. Here’s how the process will run smoothly: • You secure thirty unique, verifiable users who are comfortable with Metamask (or any standard EVM wallet) and have a small amount of ETH for gas. • Every tester goes end-to-end: wallet connect → buy token → sell token → confirm settlement on-chain. • While moving through the app, they note UX friction, unexpected gas spikes, UI glitches, and any confusing language. Deliverables I need from you: 1. A consolidated bug...

I’m building a small-scale payment gateway that lets shoppers on my e-commerce site pay with TRX, Ethereum, BTC, XMR, and LTC. The focus is on a clean, dependable setup rather than heavy, enterprise-level security; standard encryption, confirmation checks, and basic anti-fraud routines will be enough for this first release. The gateway must handle both one-time and recurring payments. I’ll need simple merchant controls—think invoice generation, transaction status, and refund trigger—plus a lightweight REST or GraphQL API so my front-end can display QR codes, wallet addresses, and live confirmation counts without page reloads. Because I’m turning this into a standalone service for my own products, the codebase should be modular: a core processing serv...

Senior Solidity/DeFi Engineer Needed — Autonomous ETH/USDC Flash-Loan Arbitrage Bot Looking for an experienced Solidity/DeFi developer to build an autonomous ETH/USDC flash-loan arbitrage bot using protocols such as Aave and Uniswap. Requirements: * Solidity + Python/Node.js * Flash loans and DEX arbitrage * Atomic transactions * MEV/slippage protection * Gas optimization * Ethereum mainnet infrastructure * Web dashboard for monitoring P/L and transactions * Strong smart-contract security experience The system should identify legitimate price inefficiencies, simulate trades, execute profitable opportunities, and automatically repay flash loans. Important: Security-focused project. No unauthorized exploitation, oracle manipulation, protocol bypasses, or theft of funds. Pl...

...with us to finalize the technical architecture and develop the complete product. Requirements The project should include a custom token and smart contract, professional Web3 landing website, tokenomics section, roadmap, whitepaper, wallet connection, token information, basic user dashboard and required Web3 integrations. The token should be deployed on a suitable blockchain such as BNB Chain, Ethereum or another recommended EVM chain. The developer should handle smart-contract development, frontend integration, testing on testnet, bug fixing and final mainnet deployment. The website must be responsive and optimized for desktop and mobile. We are looking for someone who has practical experience with Solidity, React/, , MetaMask/WalletConnect and smart-contract deployment

...Inflation/deflation mechanism * Burn mechanism if economically justified Team and investor allocations must have appropriate long-term vesting rather than immediate full unlocks. ### 5. Multichain Wallet I need a professional **multichain wallet**, not only a SHZ wallet. The architecture should support Shanzai and major external networks where technically and legally appropriate, such as: * Shanzai * Ethereum * BNB Chain * TRON * Polygon * Additional networks in the future Wallet features: * Create wallet * Import wallet * Seed phrase backup * Secure private-key management * PIN/biometric security * Send * Receive * QR scanning * Token management * Transaction history * Network selection * Custom RPC * DApp connectivity * Staking * Swap integration where available * Addres...

...similar in functionality to Trust Wallet (UI/UX will be provided separately — this project is focused on core wallet functionality and security). Core Requirements: 1. Platform: Native or cross-platform app for both Android and iOS (React Native / Flutter acceptable if performance and security are not compromised) 2. Multichain Support: Wallet must support multiple existing blockchain networks (Ethereum, BSC, Bitcoin, Solana, etc. — final list to be discussed) 3. Custom Blockchain Integration: Must integrate support for our own custom blockchain network and its native coin (details and node/RPC access will be shared with the selected developer) 4. Security (non-negotiable): - Non-custodial — private keys generated and stored only on the user's devi...

...Arbitrage—switchable through a config file or command flag so I can benchmark each one independently. Core workflow will be: 1. Stream order-book or pool data with millisecond latency. 2. Detect spreads that exceed a user-defined threshold after accounting for trading fees, gas and slippage. 3. Fire one or more legs of the trade atomically, making sure any DEX side factors in gas price dynamics on Ethereum or its supported L2s. 4. Record every action to an easily queryable log or database for later performance analysis. 5. once the Arbitrage find opportunity AI execute the trade and convert in stablecoin . I will supply API keys and wallet credentials; the bot must store and reference them securely (env variables or an encrypted secrets file). Language and framework are ...

...for people who already understand cryptocurrency and are actively interested in investing. My sole purpose for obtaining these leads is to send them regular newsletters, so data quality are non-negotiable. What I need from every record • A valid email address that passes verification tools such as NeverBounce or ZeroBounce • The specific cryptocurrencies they follow or hold (e.g., Bitcoin, Ethereum, alt-coins, DeFi tokens) • Their typical or preferred investment amount range • A short note or tag on their past experience with crypto investment if available Acceptance criteria • Soft bounces under 3 %, hard bounces under 1 %. • Real Legit Crypto leads—I will run random phone/email spot checks. If you already manage or can gener...

...amount from USD to the amount of crypto currency chosen (ETH, BTC USDT or USDC) 2) Crypto currencies accepted should be these four: ETH (Ethereum chain), USDT (Ethereum chain), USDC (Ethereum chain), BTC (native chain) 3) On checkout page: Allow client to choose which crypto currency he will use + Show chain name to send token (Ethereum or BTC) + Calculate exact crypto amount instantly based on current online price + show destination address easy to copy paste and in QR code format as well if possible so they can scan if they use mobile. The client should have 12 hours to send the amount seen on screen. 4) Detect the transaction on the explorer of the chain (Ethereum or Bitcoin) and redirect the client to existing THANK YOU page as soon as the first co...

Someine that can create or generate FL Coins USDT with software or online tools to send .. Seasoned crypto software developer with deep expertise in blockchain architecture, smart contract development, DeFi protocols, and secure Web3 infrastructure. Skilled in building scalable decentralized applications (dApps), integrating multi-chain solutions, and developing high-performance backend systems using Solidity, Rust, Go, and TypeScript. Strong focus on security, protocol optimization, and delivering production-ready blockchain solutions for startups and enterprise platforms.

I need a full-stack developer who can build a launchpad. You should be familar with experience with and pump fun logic We will have uniswap v2 pool and classic mode as Please give us the quote and timeline to build this launchpad

...tracking dashboard or documented API • Brief handover session and technical documentation Acceptance criteria: contract passes standard Tronscan verification, staking rewards calculate correctly over three test cycles, and wallet interactions run error-free in TronLink on mainnet. Although Tron is the preferred chain, I am open to hearing how you might future-proof the codebase for porting to Ethereum, Binance Smart Chain, or Polkadot later on....

I’m building a decentralised portal that lets students handle every administrative step—from opening a profile to paying tuition—directly on Ethereum. The site must: • let users connect a MetaMask (or any Web3) wallet, create a personal profile and register as a student • allow real-time course browsing, enrollment and on-chain fee payment in ETH or an ERC-20 we define • route each payment and enrollment request to an admin dashboard where staff can verify KYC details, approve or reject registrations and manage fee settlements • store all critical actions in Solidity smart contracts, fully tested and verified on Etherscan, with events that keep the front-end in sync • give admins rich analytics—total fees collected, outstandi...

...* Good understanding of Bitcoin, cryptocurrency and mining * Knowledge of PoW and PoS * Understanding of Smart Contracts * Familiarity with Hyperledger * Understanding of IPFS and NFTs * Ability to explain technical concepts clearly to undergraduate students * Good classroom communication and presentation skills * Prior academic or corporate training experience is preferred Experience with **Ethereum, Solidity, Hyperledger Fabric, Web3 or blockchain-based applications** will be an advantage. ### Student Activities The trainer will also guide students through curriculum-related activities such as: * Case study on blockchain mining, cryptocurrency and mining pools * Discussion on blockchain integrity * Student presentation on blockchain applications and digital asset management...

I need a seasoned blockchain developer to wire a multi-wallet flow into my existing iGaming platform. Players must be able to make deposits, withdraw winnings, and move balances between their own on-site wallets while we quietly sweep funds into our hot and cold vaults for risk management. Currencies in scope are Bitcoin (BTC), Ethereum (ETH), Litecoin (LTC), and SOL. The front-end is React/, the back-end exposes REST and GraphQL endpoints, and we already run a PostgreSQL ledger that records every chip and token—your job is to connect on-chain activity to that ledger with real-time confirmations and webhook callbacks. Key requirements • End-to-end handling of Deposits, Withdrawals, and Transfers between wallets. • Automated sweeps batching user balances into pr...

I need a complete blockchain-powered backend whose main role is to run and interact with smart contracts. Your task is to design, code, test, and deploy those contracts and then expose their functions through a clean API that my front-end team can consume. The choice of chain and contract language is open; whether you prefer Ethereum, Hyperledger, or Binance Smart Chain, and whether you work best in Solidity, Rust, or Vyper, I am happy to follow your technical lead as long as the solution is secure and maintainable. Security, gas or resource efficiency, and clear documentation matter most to me. The API should support standard CRUD-style interactions with contract state and include basic authentication so we can drop it straight into our staging environment. Deliverables • ...

...Unity, Unreal Engine, or another proven toolset, the same codebase should compile cleanly for Windows/macOS and iOS/Android. For the wallet layer the only coin I need live on day one is USDT. Deposits, in-game wagers, and instant withdrawals are mandatory, wrapped in a clean interface that feels native to each platform. I’d like the contract/API architecture kept modular so adding Bitcoin or Ethereum later is straightforward. KYC hooks, rate-limited withdrawals, and basic admin reporting (volume, active users, game results) round out the back office. Successful delivery means: • PC, iOS, and Android builds install and run without crashes • Ball physics and game rules match standard eight-ball regulations • A test USDT transaction moves from external wa...

DID YOU BUILT AN ENTIRE SOVEREIGN CROSS CHAIN PROTOCOL FROM THE GROUND UP? CONTROL Testnet is where you build and verify the engine $50 EACH MODULE PAID AFTER VERIFIED DELIVERY ONLY MODULE 1: Subsidy Pool| Built | Deploy via Hardhat / Foundry | MODULE 2: UTXO Harnes | Built | Run live testnet tests | MODULE 3: Relayer Daemon | Built | Initialize with `.env` config | MODULE 4: Alt-UTXO Adapters| Built | Configure RPC endpoints | MODULE 5: EVM PoW Deploy | Built | Deploy to ETHW / Syscoin testnets | MODULE 6: Monero Adapter| Built | Connect to `monero-wallet-rpc` | MODULE 7: Beldex Adapter | Built | Connect to `beldexd` | MODULE 8: Frontend Bridge| Built | Inject into HTML UI & test | Detailed Scope of Work (The 8 Modules) MODULE 1: Subsidy Pool (Solidity) Needs deployment via Hardh...

I need Bitget Wallet wired into my existing decentralized application so users can connect on Ethereum and enjoy the same smooth experience they already have with the other wallets we support. Core scope • Establish a reliable connection flow: detect Bitget Wallet, prompt connection, and surface the user’s ETH address in the UI. • Enable full transaction capability on Ethereum—send and receive assets, sign messages, and interact with our deployed smart contracts seamlessly through or web3.js. • Pull and display the user’s recent Ethereum transaction history inside the app. • Keep the current code-base untouched where possible and document every new function so future maintenance is straightforward. I’m open to you...

... or similar) • Admin-friendly dashboard so I can update content, swap contract addresses, or push announcements without editing code • SEO-ready pages and basic analytics hooks so we can monitor viral traction from socials Tech you’re welcome to propose: React + , Vue, or another performant stack you’re comfortable shipping quickly; smart-contract calls are already live on Ethereum, so no contract work is needed—just front-end hooks and API endpoints. Success looks like: 1. Visitors can connect their wallet and transact without leaving the site. 2. UI/UX meets the polished, finance-grade standard of “professional and sleek.” 3. Code is clean, documented, and deploys painlessly to an AWS, Vercel, or similar environment. If this ...

...wallet that runs smoothly on iOS and Android. Private keys must never leave the user’s device, and the experience needs to feel as simple as any mainstream payments app. Core feature set • Send and receive cryptocurrencies with QR scanning and shareable wallet addresses • Real-time and historical transaction list with clear status indicators • Multi-currency support from day one (Bitcoin, Ethereum/ERC-20 preferred) and an architecture that lets us add new assets quickly Security and recovery • Biometric authentication (Face ID / Touch ID / Android Biometrics) • Optional two-factor authentication before approving a transaction • Passphrase backup that users can export, verify, and import at any time Under the hood I expect: ...

I’m ready to allocate a minimum of ₹1 lakh exclusively into cryptocurrency, but I don’t want the usual Bitcoin-or-Ethereum route. My interest lies in promising altcoins that can realistically compound into a steady ₹10 k return every month while still keeping the overall objective of long-term growth in focus. Here’s what I need from you: • A researched, data-backed portfolio allocation concentrated on lesser-known coins with solid fundamentals, clear use-cases, and active development. • Defined buy-in ranges, position sizes, and a rebalancing schedule that protects capital yet targets the 10% monthly yield I’m after. • Risk-mitigation tactics—stop-loss levels, diversification ratios, and contingency plans for market downturns. &bu...

...to learn new software and platforms quickly. * Reliable internet connection and a suitable home-office setup. * Ability to work independently with minimal supervision. * High level of discretion when handling confidential employee, financial, and business information. ### Crypto Knowledge – Required Candidates should be comfortable explaining and working with concepts such as: * Bitcoin and Ethereum * Stablecoins such as USDT and USDC * Crypto wallets and wallet addresses * Blockchain networks * Sending and receiving cryptocurrency * Transaction hashes and blockchain explorers * Basic crypto security practices * Crypto payments and contractor compensation * Basic understanding of DeFi/Web3 terminology **This is not a role for someone who simply has an interest in crypto...

...(token-gated) mediante el estado de contratos inteligentes o firmas en el backend Web2.5, garantizando derechos de comunicación exclusivos para los miembros autorizados. 2. Requerimientos Funcionales y Técnicos Core A. Control de Acceso Token-Gated y Autenticación (Capa Web2.5) * Identidad y Autenticación: Implementación de autenticación Web3 mediante wallets EVM/Solana (SIWE - Sign-In with Ethereum o equivalente) integrada con abstracción de login social Web2.5 (ej. Privy, Dynamic o Web3Auth). * Motor de Validación de Acceso (Gating): * Verificación en tiempo real del estado de membresía (balance ERC-20/ERC-721, Soulbound Tokens o claims JWT firmados desde el backend) previo a la iniciación de...

...different crypto wallets and document the execution quality of each swap. Requirements For each wallet: Perform one swap using the wallet's native swap feature. Use the same trading pair and approximately the same trade size across all wallets whenever possible. Record the following information: Wallet, Test date, and Device and OS Wallet name and version Pair and network Example: ETH → USDT on Ethereum Amount sent Amount of the input token Rate shown Exchange rate quoted by the wallet immediately before confirming the swap Market rate (same minute) Market price from a reputable source at the time of execution Amount received Final amount received Gas paid Network fee paid Total cost against market Difference between the theoretical market value and the actual outcom...

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I’m launching a DeFi application on the Ethereum network and need a developer who can take full ownership of the smart-contract layer. The core goal is to design, code, and deploy Solidity contracts that power the protocol’s functionality while keeping security and gas efficiency front of mind. Key expectations • Architect and write production-ready smart contracts for a DeFi application (Solidity on Ethereum). • Create migration/deployment scripts and configure Hardhat or Truffle for local and testnet environments. • Build a concise test suite (Mocha/Chai or similar) covering edge cases, exploits, and upgrade paths. • Optimise gas usage and follow current best practices for re-entrancy guards, overflow checks, and access control (Open...

...customer's identity is verified, the verified KYC data can be reused across multiple banks, reducing duplicate verification, saving time, and lowering operational costs. A credit assessment module analyzes the customer's financial information and credit history to support fair and faster credit allocation. Technologies Used: Frontend: HTML, CSS, JavaScript Backend: Java, Spring Boot Blockchain: Ethereum, Solidity, Web3j Database: MySQL Key Features: Secure and decentralized KYC storage Tamper-proof customer records using blockchain Smart contract-based KYC verification Faster and transparent loan approval process Reduced fraud and duplicate KYC submissions Improved customer trust and data privacy Outcome: This project enhances the security, transparency, and efficien...

I'm seeking an experienced developer to create a flash loan website connecting to major DeFi protocols: Aave, Uniswap, and Compound. Flash USDT The platform should feature: - Loan calculator: To estimate loan amounts and costs. - Real-time mar...calculator: To estimate loan amounts and costs. - Real-time market data: To provide updated info on asset prices and market conditions. - User dashboard: For tracking loans, repayments, and portfolio performance. Ideal candidates will have: - Strong background in DeFi and blockchain technology. - Experience with building financial tools and dashboards. - Proficiency in smart contracts, particularly on Ethereum. - Ability to integrate real-time data feeds. Please provide examples of similar projects and your approach to security and u...

...for an experienced developer to help us expand it into a production-ready marketplace. Here is what I'm after: - Develop a modern, responsive web application using React/ (or a similar framework) with a clean and intuitive user experience. - Build scalable backend services using Node.js, , and PostgreSQL to manage users, assets, marketplace data, and transactions. - Integrate Ethereum/Polygon smart contracts (ERC-721/ERC-1155) for asset tokenization and ownership management. - Implement wallet connectivity (MetaMask, WalletConnect, etc.) and support secure blockchain interactions. - Develop marketplace features, including: * Browse and search tokenized assets * Advanced filtering and sorting * Asset detail pages * User portfolios * Auctions and direct trading

I need a developer who can build a web-based payment flow that accepts both one-time and recurring transactions, routes them through Coinbase Commerce, and settles funds directly to a specified USDT wallet address. In addition to USDT, I also want the platform to accept Ethereum (ETH). Core objectives • Embed a checkout experience that supports single purchases as well as subscription billing. • Use the Coinbase Commerce API to create, track, and confirm invoices. • Automatically convert or settle balances to my USDT wallet address once each invoice clears. • Allow ETH payments to follow the same confirmation and settlement logic. • Provide a lightweight admin page or dashboard where I can view payment status, issue manual refunds, and export ba...

I’m finalising a short-term build on the Ethereum blockchain and have reached the stage where I need specialist help with two closely related pieces: • Raw transaction creation – crafting, signing and broadcasting the low-level transactions (RLP encoding, nonce and gas management, offline signing, etc.) that will deploy and interact with the contract. • A bespoke token smart contract – the core logic is outlined but still flexible; I want to be certain the code is solid, secure and optimised before it goes live. Here’s what I’m expecting from our collaboration: 1. Review or write the Solidity for this custom token contract, compile it and demonstrate successful deployment on a public testnet. 2. Produce example raw transactions for key a...

I need help crediting my Redotpay wallet with USDT. The balance will be coming from my own personal wallet. For the network, I indicated “Redotpay” because the app itself does not make the underlying chain obvious, so I will rely on you to confirm whether I should send over Ethereum (ERC-20), Tron (TRC-20) or Binance Smart Chain (BEP-20) based on fee structure and compatibility with Redotpay’s deposit addresses. Here is what I am looking for: • Clear, step-by-step instructions to generate the correct deposit address inside Redotpay and verify it matches the chosen chain. • Guidance on any required minimum amount, confirmations, or reference fields Redotpay may ask for during the transfer. • A quick safety checklist so I can double-check e...

...ConfidentialPayroll protocol across Ethereum, Solana, and other VMs Integrate zero-knowledge proof systems (Ligero/Arc) for transaction privacy and compliance Implement cross-chain settlement mechanisms using Circle's CCTP and Hyperlane Integrate FHE (Fhenix/Zama) for encrypted state management of payroll rosters Build and maintain the backend API orchestrator (Express/TypeScript) to manage the 7-stage payment pipeline Write secure, well-tested, and documented code for our core infrastructure Collaborate with the team on architecture decisions and technical roadmap REQUIREMENTS 3+ years of software development experience, with at least 2 years of hands-on blockchain development Deep expertise in Solidity and experience with EVM-compatible chains (Ethereum, Ba...

Consultation on multisig architecture for USDT (TRON, BSC, Ethereum) What needs to be done: conduct an independent expert consultation on implementing multisig wallets to protect the treasury funds of a company that processes high-volume USDT payments simultaneously across three networks - TRON (TRC20), BNB Smart Chain (BEP20), and Ethereum (ERC20). Required: (1) provide an overview of available solutions on the market and recommend the optimal one for our profile - a single custodial platform for all three networks or a combination of separate tools for EVM and TRON; (2) propose a signature architecture (e.g. 2-of-3), key distribution across roles, and thresholds for small/large payouts; (3) provide recommendations on key storage (hardware wallets, HSM) and procedures in ca...

...someone who can independently manage the complete recruitment lifecycle—from sourcing top talent to coordinating interviews and helping us hire the right candidates. What You'll Be Hiring For We are actively hiring: • Full Stack Developers • Frontend Developers (React, , Vue.js, Angular) • Backend Developers (Node.js, NestJS, Python, Django, .NET, Java) • Blockchain Developers (Solidity, Ethereum, Polygon, Solana, Web3) • AI & Data Engineers (Preferred) • DevOps Engineers (Preferred) Responsibilities • Manage the complete recruitment process from start to finish. • Create and optimize job postings on Upwork and other relevant platforms. • Source high-quality candidates using LinkedIn, GitHub, Upwork, and other channels. ...

...Blockchain Verified Global Verification Privacy First Permanent Record The headline and primary CTA should remain the strongest visual focus. Design Principles The Hero should immediately answer: What does this platform do? Why should I trust it? Why is it different? Why should I use it? The Hero should explain the platform visually—not simply decorate the page. Please Avoid Do NOT use: Bitcoin symbols Ethereum logos Cryptocurrency graphics Trading charts NFT artwork Cybersecurity shields Locks Padlocks Luxury cars Sports cars Watches Yachts Gold bars Diamonds Random expensive objects Generic AI-looking artwork Busy layouts Too many floating objects Device mockups (phones, tablets, laptops) as the main Hero visual Focus on proof of ownership, verification, and trusted docum...

I want a web platform where players deposit Bitcoin, Ethereum, or Litecoin, open randomized loot-box style cases, and instantly withdraw any winnings they decide to cash out. The flow should feel identical to popular skin-unbox sites, but with native crypto handling from start to finish. Core Experience • Seamless wallet connection or generated in-site wallet for BTC, ETH, and LTC • Provably-fair RNG powering the randomized loot boxes so users can verify each roll • Live animation of every unbox, plus a running feed that highlights big pulls to keep the page energetic • Instant smart-contract or API-driven payouts when a player clicks “withdraw” • Simple, responsive UI that works on desktop and mobile Admin Side • Dashboard tha...

I need a complete, verifiable list of every Ethereum wallet that has ever transacted directly with a single, specified address. My goal is simple: extract the “address IDs” only—no amounts, timestamps, or hashes—then deliver them in a clean, deduplicated list (CSV or JSON is fine). You are free to leverage Etherscan, Arkham Visualizer, , or any other reliable on-chain parsing method, as long as the logic is reproducible. A short script or notebook that I can rerun later to refresh the list will be part of the hand-off. Acceptance criteria • Exhaustive coverage of all historical transactions to and from the target address on Ethereum mainnet • One row per unique counterparty address, no duplicates • Delivery of both the list file ...

...possible. You will collaborate directly with our front-end team; once a contract is ready, you’ll expose ABI endpoints, write simple integration docs and jump on a quick call if something breaks in staging. Expect regular code reviews on GitHub, coverage reports in CI, and at least one external audit before we push to production. What I’m looking for • Proven track record of shipping contracts on Ethereum or any other EVM chain. • Fluency with ERC-20/721 standards, proxy patterns, and OpenZeppelin libraries. • An eye for security: re-entrancy, overflow/underflow, access control, oracle manipulation, the works. • Ability to translate product specs into modular, well-commented code and anticipate edge cases early. • Clear, timely com...

I’m ready to move from concept to working MVP for a fully decentralised, zero-fee crowdfunding platform on Ethereum. Campaign creators will deploy a dedicated smart contract that collects ETH directly, so backers interact only with the chain—no custodial wallets or middlemen. The attached docx lays out user flows, contract interface, and UI wireframes; you’ll turn that vision into code. Key context • Our creators’ core need is simple: raise funds for their projects. • The first public release will showcase technology-focused campaigns, giving us a clear niche to test traction before we expand. What I need from you 1. Develop and thoroughly test the Solidity contracts exactly as specced, including create-campaign, contribute, refund, and with...

I’m looking for an experienced blockchain developer who can create a fully compliant security token whose core purpose is to provide holders with investment returns. I’m flexible about both the token’s classification (utility, asset-backed, or equity) and the underlying chain (Ethereum, Binance Smart Chain, Stellar, or another you recommend). What matters most is that the structure meets relevant securities regulations and is technically sound. Key objectives • Design the token’s economic model and compliance flow so investors receive returns legally and transparently. • Write and audit the smart contract code (Solidity or the language suited to your chosen chain) with features such as transfer restrictions, whitelisting/KYC hooks, dividend or pr...

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...ownership of each transaction and me, as the store owner, iron-clad control over inventory, payments and dispute resolution through smart contracts. The build needs to cover the full stack: a responsive web storefront, the back-office admin dashboard and the on-chain layer that processes orders, handles payments in crypto and records delivery milestones immutably. I’m open on whether we use Ethereum, BNB Smart Chain, Solana or another network; what matters most is a secure, gas-efficient and future-proof solution. Bring your own recommendations and explain why they fit. Deliverables • Production-ready smart contracts with clear comments and unit tests • Modern web UI/UX (React, or similar) wired to the contracts via Web3 / • Crypto and fiat paymen...

I want a small, self-contained PHP script with a browser-based GUI that sits on my Linux server and lets me swap my own ERC-20 token (the one I already hold in MetaMask) for ETH on the Ethereum Mainnet. The interface should: • Detect the connected MetaMask wallet, display the token balance, and let me enter how many tokens to convert. • Allow me to define and later update the conversion price (token-to-ETH rate) from a simple settings panel so I can run private sales without touching the code. • Build and sign the transaction client-side via MetaMask, then broadcast it so the user receives ETH back to the same wallet once the swap succeeds. • Show clear status and Tx hash feedback while the transaction confirms. Please keep the script focused on this sing...

I want a production-ready flash-loan arbitrage bot that operates on Ethereum and combines Aave flash loans with price opportunities across Uniswap and Sushiswap. The core workflow is: • Pull live on-chain and off-chain prices, detect profitable spreads in milliseconds. • Instantly launch an Aave flash loan, route the borrowed amount through Uniswap and Sushiswap, and repay the loan plus fees within the same block. • Optimise gas by simulating each bundle and selecting the lowest-cost route before submission. Key requirements • Real-time price monitoring with sub-second latency (I’m happy to run a dedicated node or use WebSocket endpoints if that helps). • Fully automated trade execution from detection through settlement, no manual clicks. ...