Blockchain Jobs

Customisable, Ready-to-use cryptocurrency exchange(website/App) required. Payin and Mass-Payout transactions around the world in cryptocurrency(XYZCOIN) through your exchange should be possible in my website

We’re building a real-money poker product with a hybrid architecture: gameplay runs off-chain for speed, while money movement and final settlement happen on-chain. We need a senior blockchain engineer who has already shipped secure contracts in production and can work closely with backend/frontend developers. You’ll be responsible for designing and implementing the contract layer for buy-ins, pot escrow, and automated payout distribution. You should also be comfortable integrating wallet flows, handling edge cases in transaction processing, and building with audit readiness in mind. What we need you to own: Solidity contracts for deposit handling, table escrow, and winner payouts Integration pattern for off-chain game results -> on-chain settlement Wallet-based user flow s...

Cüzdan yönetimine odaklanan yalın ama güvenilir bir kripto uygulamasına ihtiyacım var. Uygulamada tek önceliğim, anında transfer özelliğinin sorunsuz ve hızlı çalışması. Temel kapsam • Kullanıcılar kendi kripto cüzdanlarını oluşturup yönetebilmeli. • Anında transfer: Aynı ağ içindeki adreslere saniyeler içinde gönderim ve alım. • Basit, anlaşılır bir arayüz; masaüstü ya da mobil tarayıcıda rahatça çalışmalı. • Ödeme/transfer sonuç ekranında işlem kimliği ve onay durumunu net gösteren bildirim akışı. Teknik beklentiler • Modern bir backend dili (Node.js, Python, Go vb.) ve iyi bilinen bir blok-zincir SDK’sı kullanmanı tercih ederim. &bul...

Alianza Estratégica: Estructuración de STO para la activación operativa de Brigada Minera El Cordero de Alí, C.A. Estimados profesionales, Reciban un cordial saludo. Me pongo en contacto con ustedes en mi calidad de Responsable de la empresa Brigada Minera El Cordero de Alí, C.A. (RIF J-41226497-4), bajo la dirección de su propietario, el Sr. Jonny Gil. Nuestra compañía posee una alianza minera de diamantes bajo el marco de la Ley Orgánica de Minas de 2026. Contamos con un activo fundamental: estudios técnicos y geológicos de cubicación que certifican con exactitud el quilataje y la calidad de nuestras reservas. Propuesta de Colaboración: Tokenización y Puesta en Marcha Actualmente, nos en...

I run a small but busy software studio and I’m ready to hand off the entire bidding workflow to a seasoned virtual assistant. Your main responsibilities will be: • Proactively searching the major freelance marketplaces for quality web, mobile and blockchain projects that match our technical stack Success for me looks like a healthy flow of qualified leads and a solid conversion rate from bid to contract. If you already track your win ratio, please share the figures along with a quick overview of the niches you’ve had the most success in. I’m open to a long-term collaboration, so outline your pricing structure—hourly, per proposal, or success-based—and any KPIs you prefer to work toward. Ready to get started as soon as we agree on format and cadenc...

We’re a new private crypto brokerage focused on helping clients buy and sell digital assets privately through OTC and peer-to-peer deals. Our clients range from active traders to high-net-worth individuals who value discretion, speed, and direct relationships over public exchanges. We’re building this lean and fast, so your input will matter from day one. If you know crypto, value client trust, and can stay sharp in a fast-moving environment, you’ll fit right in. Looking for remote workers based in the United States, preferably California or New York, to help us meet our growing demand by assisting with procurement of supplies (crypto and digital assets). You’ll be working directly with me on client acquisition, deal coordination, and maintaining the trust tha...

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

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

I’m building the first release of Qubit’s web-based medical supply-chain platform and need a developer who can turn our concept into a working MVP that proves one crucial point: anyone—manufacturers, retailers and even end consumers—can instantly verify the authenticity of a pharmaceutical item the moment they scan or enter its data. Scope of the MVP The build should centre entirely on pharmaceutical traceability, with special emphasis on real-time authenticity checks. Core flows include uploading or generating batch/serial data at the manufacturing side, passing that data through the distribution chain, and exposing a simple verification interface that confirms a product’s legitimacy before it reaches (or is dispensed to) a patient. Key features to im...

You can send this directly to your developer: I want to build a website similar to with a centralized USDT-INR OTC exchange system. The platform should allow users to: * Buy USDT using INR * Sell USDT for INR * Deposit INR * Withdraw INR * Deposit USDT (TRC20) * Withdraw USDT (TRC20) The platform should work as a centralized custodial wallet system where admin controls all wallets and balances internally. Users should NOT control private keys. All user balances should be stored and managed using an internal ledger/database system. Main Website Features User Features Authentication * Mobile OTP login * Email login * 2FA support ⸻ Dashboard Users should see: * INR balance * USDT balance * transaction history * deposit/withdrawal history ⸻ Buy USDT User enters INR amount and...

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

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....

Advise and help setup a crypto mining project. We have servers with good connection speed. We are considering mining eth , btc or solana . We need advice on the best coin to mine and probability, as well as security and scalability. And the best control panel to utilize. Starting today

I need a senior blockchain engineer to build and ship a full-featured P2P exchange and non-custodial wallet using React Native for iOS and Android. Users will register with phone or email, confirm through OTP, then receive JWT-secured sessions. Inside the app they must be able to hold and move BTC, ETH and USDT across TRC20, ERC20 and BEP20 networks, with private keys remaining on the device. The trading engine has to support P2P buy/sell with an escrow smart contract and limit orders for direct matching. Fiat on-ramp payments will begin with UPI and standard bank transfer; the flow must release crypto automatically once escrow conditions are met. An admin console will let me review KYC/AML submissions, manage disputes and view transaction logs in real time. Security is critical: 2FA, en...