Ethereum jobs

...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...

My WooCommerce-based store needs the option for customers to pay in Bitcoin, Ethereum and Litecoin. I want to keep complete control of the funds, so I’m leaning toward a bespoke payment gateway plugin rather than relying on a third-party SaaS. The finished gateway should slot in cleanly alongside existing WooCommerce payment methods, expose clear callback/webhook events for order status updates, and store transaction data inside WordPress without bloating the database. I’m undecided on whether incoming crypto should be auto-converted to fiat or left as native coins, so I’ll need your guidance on best practices, risks and costs for both approaches. I also don’t have a wallet provider locked in yet, so please be prepared to recommend secure, self-custody optio...

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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...

...minting/burning; role permissions; pause controls; multisignature-compatible administration; treasury controls; redemption burn workflow; automated tests; testnet deployment; deployment scripts; verification and audit readiness. Do not hard-code token price, supply, asset-to-token ratio, ownership rights, redemption thresholds, discounts, liquidity, appreciation or allocations without written approval. No Ethereum Mainnet deployment without explicit authorization. Prepare configurable tokenomics covering supply, allocations, treasury, fees, reserve ratios, minting, burning, redemption and reporting. Prepare future Proof-of-Reserves modules for inventory, documents, token supply, reserve calculations, reconciliation, discrepancies, attestations and historical reports. Prepare r...

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...

...proof of reserves, redemption portal, white paper, exchange listing support, global marketing, documentation, source-code handover and support. Please review the attached PDF for the complete detailed scope. The project will not be awarded to freelancers who do not confirm the full technical, marketing, documentation and handover requirements. Core deliverables must include: - ERC-20 token on Ethereum Mainnet. - Solidity smart contract using OpenZeppelin or equivalent audited libraries. - Etherscan verification. - Fixed or capped supply. - Multisig ownership and treasury control. - No hidden taxes, honeypot functions, backdoors, sell restrictions or hidden owner privileges. - Smart contract audit before launch. - USDT ERC-20 presale platform. - Investor registration, KYC/AML a...

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. ...

...blockchain engineer I can rely on for a steady stream of work. The assignments range from writing and testing production-grade smart contracts to troubleshooting main-net deployments, building full dApps, and occasionally reviewing other developers’ code for security and gas optimisation. Because our clients come with very different ideas, you should be comfortable jumping between chains such as Ethereum, Binance Smart Chain, or even Polkadot when required, and you’ll likely touch Solidity most days, with Rust or Go popping up on some specialty jobs. If you have strengths in only one of those stacks, that’s fine—we can shape early tasks around your core expertise and then branch out together. Typical week-to-week work might involve: • Designing and...

SUPERAGENT v4.1 IRONCLAW — AI Agent Crypto + Dev (37 Skills, Self-Hosted, Hermes-Compatible) 37 SKILL MODULES (semua include): Crypto/Web3 (H1-H10): • Swap token multi-chain (Ethereum, BSC, Solana, Base) • Bridge cross-chain (LayerZero, Stargate, ) • DeFi ops (Aave, Lido, GMX, Hyperliquid, Pendle) • Token sniping (anti-honeypot, rugcheck, GoPlus) • Mempool watch + whale tracker (Nansen, Arkham) • NFT marketplace (Blur, Magic Eden, Tensor, OpenSea) • Smart contract read/write (ABI inspector, proxy, EIP-712) • Deploy contract (Foundry, Solidity, CREATE2) • SIWE/WalletConnect auth • Browser automation untuk dApps (Playwright) Automation/Dev (m-cluster): • Telegram/Discord bot (cron, webhook, auto...

...blockchain engineer I can rely on for a steady stream of work. The assignments range from writing and testing production-grade smart contracts to troubleshooting main-net deployments, building full dApps, and occasionally reviewing other developers’ code for security and gas optimisation. Because our clients come with very different ideas, you should be comfortable jumping between chains such as Ethereum, Binance Smart Chain, or even Polkadot when required, and you’ll likely touch Solidity most days, with Rust or Go popping up on some specialty jobs. If you have strengths in only one of those stacks, that’s fine—we can shape early tasks around your core expertise and then branch out together. Typical week-to-week work might involve: • Designing and...

I’m ready to put a portion of my portfolio to work in Ethereum and a carefully selected basket of altcoins, with the clear aim of building long-term value rather than chasing quick flips. I need a seasoned crypto trader who can shape a disciplined strategy, execute the actual buys and sells for me, and monitor the positions over time. Here’s what matters to me: • Evidence of a proven, data-driven approach that suits multi-month or multi-year horizons. • Thoughtful coin selection beyond ETH—quality projects with solid fundamentals and reasonable tokenomics. • Risk controls (position sizing, re-balancing schedules, stop-loss logic) that protect downside without forcing premature exits. • Regular, concise performance reports so I always kn...

...possible three-leg price loops, calculate net profitability after trading and withdrawal fees, and instantly execute the cycle whenever a preset threshold is met. Key points I need respected: • Strategy: pure triangular arbitrage; no cross-exchange spread trading. • Exchanges: Binance and Bybit only, with simple JSON/YAML files for my API keys and adjustable parameters. • Assets: Bitcoin, Ethereum and Ripple pairs (for example BTC/USDT, ETH/BTC, XRP/ETH, etc.). • Safety: position sizing, failed-leg rollback, and a dry-run mode so I can test live order books without placing real orders. • Clarity: modular functions, clear comments, and a concise README that explains installation, config variables and how profit is computed. Please code as simply ...

...authentication on every outbound transaction as well as on any sensitive settings screen. I’m happy to discuss SMS, email, or authenticator-app–based 2FA—choose whichever you can implement most robustly. I’m aiming for a straightforward user experience with optional room to grow: even though the initial scope covers Bitcoin exclusively, the architecture should be modular enough that I can add Ethereum, Litecoin, or other chains later without a full rewrite. Deliverables • Fully functional Android and iOS apps (React Native, Flutter, or native—open to your recommendation). • Secure backend or trusted third-party API integration for balance and UTXO handling. • Source code pushed to a private repo with clear build instructions. &...

...000 to $140,000 per year, paid monthly. Role Overview We are hiring a senior Blockchain Engineer to help design and build a copy trading protocol with on-chain vaults, relay contracts, and cross-chain settlement infrastructure. The role requires production-grade experience across Ethereum, Solidity, DeFi systems, and security-focused smart contract development. Technical Requirements Candidates should have 4+ years of professional experience and strong hands-on expertise with: Solidity 0.8.25+ and Foundry Ethereum and EVM architecture , , and TypeScript Rust and Solana development DeFi protocols and on-chain trading systems Git, Docker, and CI/CD pipelines Security auditing, testing, and mainnet-fork workflows Cross-chain infrastructure and blockchain integrations Addition...

I nee...Alongside the contract, I want a lightweight web dApp that lets users connect with MetaMask, view total supply, and call the mint function in a single, smooth flow. A clean React or front end with is fine; if you prefer Vue or another modern stack, I’m open as long as the UX is clear and responsive. Key acceptance criteria: • Verified, optimised Solidity code deployed on Ethereum mainnet (testnet first for review). • Minting controlled by owner role, with events properly emitted. • Front-end fully wired to the contract, wallet-connect ready, and deployed to a public URL. • Full hand-over of source (Solidity, front-end, and deployment scripts). Once we agree on milestones I’ll supply the token name, symbol, and any branding asse...

I need a web-based trading platform that I can fully manage from an admin console. After a quick email-and-password signup, each user should automatically receive both a profile and a unique, custodial wallet address. At launch the platform will handle Bitcoin and Ethereum; the codebase must be structured so I can add further coins later without a full rewrite. Key functions I must have as the administrator: • Real-time dashboard showing every registered account, current balances, recent deposits, and withdrawal requests. • Ability to push crypto from a master wallet into any user wallet on demand. • Withdrawal workflow that blocks release of funds until the user pays a configurable fee I set in the backend. User-side essentials: • Responsive trading interf...

...snippets, or quick-fire TikTok captions—whatever medium best carries the message. You’ll pull raw data from sources like CoinMarketCap, TradingView, Glassnode (or similar tools you prefer), spot the headline movement, add a dash of context, and wrap it in language that makes sense to both newcomers and seasoned crypto watchers. Deliverables • 4–6 social posts per week focused on Bitcoin, Ethereum, and notable altcoins • One-sentence headline, a concise 100–150-word explanation, and 1–2 key data points or charts (link or image) per post • Engaging hashtags and a clear call-to-action that fits the platform • Content formatted and scheduled in a shared Google Doc or directly in the platform’s draft area, ready for my...

I need an experienced blockchain coder to handle the entire smart-contract layer of my upcoming project. The priority is clean, secure smart contract development—from architecture through deployment—while keeping gas costs and upgradeability in mind. I have not locked in a chain yet, so if you are comfortable on Ethereum, Binance Smart Chain, Polkadot, or can justify another EVM-compatible network, please outline why it fits. I’m equally open on the contract’s purpose: token logic, an NFT framework, or a back-end for a dApp are all in scope; the key is that the code is solid and audit-ready. Deliverables • Full Solidity (or relevant) source with in-line comments • Comprehensive unit tests and deployment scripts (Hardhat or Truffle preferred) ...

..., yet is entirely my own codebase. The core idea is simple: visitors browse an inventory of digital gift cards, drop any value they like into a shopping cart, and pay a single on-chain invoice. The moment the network confirms the payment, the platform releases the card codes—no extra fees for the buyer, no hidden spread. Cryptocurrencies to be accepted from day one are Bitcoin, Ethereum, Monero, Solana, XRP and Litecoin. I intend to self-host full nodes for every coin, so the back-end must talk directly to those nodes, not to third-party gateways. Please architect the payment module so I can plug in or remove coins later without touching the rest of the code. Security is non-negotiable: • End-to-end HTTPS, HSTS and secure headers • Hot wallet keys never stor...

..., yet is entirely my own codebase. The core idea is simple: visitors browse an inventory of digital gift cards, drop any value they like into a shopping cart, and pay a single on-chain invoice. The moment the network confirms the payment, the platform releases the card codes—no extra fees for the buyer, no hidden spread. Cryptocurrencies to be accepted from day one are Bitcoin, Ethereum, Monero, Solana, XRP and Litecoin. I intend to self-host full nodes for every coin, so the back-end must talk directly to those nodes, not to third-party gateways. Please architect the payment module so I can plug in or remove coins later without touching the rest of the code. Security is non-negotiable: • End-to-end HTTPS, HSTS and secure headers • Hot wallet keys never stor...

I need a production-ready smart contract written for Ethereum that will handle straightforward financial transactions, then wrap it in a clean single-page dApp so end-users can interact with it without touching the command line. The contract must be solidly coded in Solidity, thoroughly tested, and deployed to the mainnet once we finish our reviews. On the front-end I want a lightweight React (or similar) page that talks directly to the contract. Wallet integration is essential—MetaMask and any other common Web3 wallets should connect seamlessly so users can approve, send, and monitor transactions. A clear, searchable transaction history pane is the second must-have so people can verify their activity in real time. Beyond those core pieces I have several additional features...

...just four classics—plinko, bustabit-style crash, roulette and slots—wrapped in a clean, minimal interface that echoes the feel of Stake and Bustabit. The priority is rock-solid security: end-to-end encryption, provably-fair game logic that is profitable, configurable and transparent, DDoS mitigation, hot-/cold-wallet separation. Players must be able to deposit, wager and withdraw in Bitcoin, Ethereum, Litecoin, Solana, Monero and USDT. If you prefer a modular gateway (e.g. CoinsPaid, Fireblocks, custom Node.js + Web3/RPC stack) let me know; I’m happy to approve whichever route best meets the security bar. For the Monero payouts we should host our own and have this configurable. I have no rigid brand guide—just the “ultra-clean” look. ...

I need a fantasy sports website developed, with essential features and a payment integration system. The website should be accessible and functional in India, but should support payments in USD and cryptocurrencies like Bitcoin, Ethereum, and Litecoin. Essential Features: - User registration and login - Fantasy sports team creation - Live scoring updates The ideal candidate should have: - Experience in developing fantasy sports platforms - Strong knowledge of payment integration, particularly with cryptocurrencies - Familiarity with regulations for operating a payment system in India This project needs to be completed as soon as possible. Please provide samples of your previous work.

I want a working proof-of-concept clock that does much more than tell the time. The device will be built on custom hardware, drive an OLED display, and continuously mine Bitcoin, Ethereum and Litecoin in the background. Two screen modes are required: • Clock mode – shows a clean, legible digital time display. • Crypto mode – fetches the current Bitcoin price via a live API and reveals a QR code linked to my Cash App wallet. Access to the QR code must be gated by a fingerprint reader. During initial setup I’ll enrol my print; later, when I touch the sensor, the device instantly switches to Crypto mode and shows the code. A button-press (or another touch) returns to Clock mode. Core expectations – Design the full electronics stack: mini...

...and digital-asset markets worldwide. Scope I’m looking for a clear, engaging piece that combines solid journalism with accessible financial insight. Please weave in: • A concise recap of the ceremony and key statements from Warsh. • Background on his previous comments or policy work related to cryptocurrencies. • Analysis of potential short- and long-term market implications for Bitcoin, Ethereum, stablecoins, and emerging DeFi sectors. • Reactions or quotes from credible economists, crypto founders, or institutional investors. • Relevant data or charts (links are fine) illustrating immediate market moves or historical precedents. Style & Length Aim for 900–1,200 words, written in an objective yet readable tone that suits both ma...

...The game itself is being developed in Unity, while the blockchain side handles things like token utility, staking, rewards, and ownership features. Right now, the main focus is the staking platform. The token presale platform is already completed, and we’re now improving and expanding the staking side before moving deeper into the ecosystem. The frontend stack is mainly: - React - - Ethereum / Base We’re looking for a strong React frontend developer with solid Web2 experience who can help us build clean, reliable interfaces and improve overall frontend quality. The Role This is mainly a frontend engineering role. You’ll be working on: - Staking dashboard and token-related UI - Wallet connection flows and transaction states - Responsive frontend componen...

I want a real-time, step-by-step walkthrough for moving my Ethereum from Trust Wallet into my wallet and then off-ramping the funds to my linked bank account. Both wallets are already set up and verified, so we can jump straight into the transfer process. During a live screen-sharing session I need you to: • Help me choose the correct ERC-20 network in Trust Wallet, generate and double-check the matching deposit address, and confirm the on-chain transaction. • Explain gas fees, typical confirmation times, and how to monitor progress on Etherscan. • Show me how to swap or sell the received ETH inside and initiate the fiat withdrawal to my bank, highlighting any limits or timing quirks. • Point out common mistakes and security best practices so I avoid

...Role: We are hiring experienced Blockchain professionals for an urgent contract opportunity with one of the enterprise-level clients. We are looking for candidates with strong expertise in Blockchain fundamentals, Blockchain architecture, Ethereum ecosystem, and solutioning capabilities. The ideal candidate should have strong technical expertise along with the ability to guide teams, mentor junior developers/interns, and drive best practices in Blockchain development. Main Skills Required: Blockchain Fundamentals Blockchain Architecture Ethereum Solution Architecture Distributed Ledger Technology Technical Mentoring Strong Coding Fundamentals Key Responsibilities: Design and contribute to Blockchain-based solutions and architectures Guide development tea...

I will perform comprehensive security analysis of your smart contracts using Mythril. Finding vulnerabilities, gas optimizations, and providing detailed audit reports for Ethereum and EVM-compatible chains.

I need a production-ready crypto exchange site that lets users trade on a live spot market with Bitcoin, Ethereum, Ripple and USDT from day one, with the option to add more pairs later. Real-time order books, depth charts, trade history and WebSocket price feeds should feel as fast as the major exchanges. Security is the main priority. The build must ship with strong account protection (2FA, email/SMS verification), cold-wallet segregation for the majority of funds, hot-wallet limits, and an architecture that can absorb DDoS spikes without downtime. Please plan for regular penetration testing and clear audit logs. A clean React (or Vue) front-end talking to a Node.js, Go or comparable back-end is preferred, but I’m open to other proven stacks if you can demonstrate equal or ...

...balances or state updates. The task also includes fixing any inefficiencies related to gas usage and improving overall contract performance. After implementing fixes, you will thoroughly test the contract using a local development environment such as Hardhat, Truffle, or Remix. The goal is to ensure stable execution and correct behavior under different scenarios. Strong expertise in Solidity and Ethereum is required. You should be comfortable with debugging smart contracts and using development tools like Hardhat, Truffle, or Remix. Knowledge of gas optimization techniques and smart contract security best practices is essential. You will provide the corrected and fully functional smart contract code. Additionally, include test cases demonstrating proper functionality and a sho...

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 ...