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Busco un desarrollador backend senior para un protocolo DeFi en Solana. El enfoque principal es el intercambio de tokens, con una integración robusta con exchanges. Requisitos clave: - Integración con exchanges - Seguridad de transacciones como prioridad Habilidades ideales: - Experiencia con Web3, Node.js y contratos inteligentes - Dominio de la blockchain de Solana - Fuerte enfoque en la seguridad Por favor, proporcione ejemplos de trabajos anteriores y experiencia relevante. :Experiencia exhaustiva en gestión de memoria, seguridad de hilos y concurrencia Dominio total del estándar de la industria para desarrollo en Solana. :Manejo experto de PDAs, CPIs y optimización de Compute Units para escalabilidad Traducir bonding curves y pools ...

I need a full-stack, self-hosted .NET solution that runs a 2 × 2 matrix MLM system. The site must let new members register under a sponsor, automatically position them in the chain, and reflect spill-over earnings in real time. Core roles are Standard user, Sponsor and Admin. A registered user should see a clean dashboard that shows an earnings overview, live balance details and a searchable transaction history. From that same panel they must be able to deposit, withdraw or transfer BEP20-based USDT, with each on-chain action recorded to the ledger and mirrored instantly in the database. The admin control panel must allow me to browse every account, approve or reject any pending deposit/withdraw request, modify wallet addresses if needed, and trigger manual payouts. Every sensitive...

I need a production-ready mobile wallet that lets users store a variety of cryptocurrencies in one place. The core requirement is a clean, intuitive interface for holding multiple assets, synced seamlessly across both iOS and Android. Security must begin with rock-solid PIN protection on every sensitive action—unlocking the app, initiating a transfer, or exporting a private key. If you have proven techniques to layer Biometric or 2-FA on top without sacrificing speed, feel free to propose them, but PIN security is the baseline I will accept. A single codebase such as React Native or Flutter is ideal for faster parallel releases, though native Swift/Kotlin solutions are welcome if they give measurable speed or UX advantages. The finished product has to pass TestFlight / Play Consol...

I want a bootable .img image for the Raspberry Pi 4 that turns the board into a fully offline, hardware-style wallet. After flashing the image to an SD card and powering up, I expect a clean graphical interface that lets me: • Generate and manage addresses for roughly forty of the most-used coins and tokens. • Sign and later broadcast transactions only when I briefly connect the Pi to a network. • Move funds straight to a linked bank account by entering a routing and account number—ACH style—without ever needing a third-party exchange. The build has to run reliably with no internet dependency at first boot, keeping all keys on the device and encrypted at rest. A simple on-screen flow for first-time setup, balance overview, and transfers is essential; I shou...

I need a single .img file that I can flash straight to a micro-SD, slot into a Raspberry Pi 4, power on, and start mining—no extra setup, no internet connection, just plug-and-play. The image must boot directly into an advanced graphical interface that lets me monitor hashrate, temperature, accepted shares, pool status, and switch coins without touching the command line. The core requirement is support for the three main algorithms I selected—SHA-256, Ethash, and Cryptonight—so the device can tackle my full portfolio of roughly forty coins. Performance matters: the system should auto-detect optimal overclock settings for the Pi 4, make efficient use of its GPUs/CPUs, and offer pool configuration options over the local network while remaining completely self-contained (...

Description:
We are looking for an experienced Web3/payment engineer to integrate a crypto payment checkout gateway into our existing marketplace platform. Our stack is React frontend + Node/Express backend (marketplace architecture). We need someone who can deliver a secure, clean, and production-ready integration with clear documentation. Scope of Work: * Integrate a crypto payment provider into checkout flow * Build backend payment endpoints + webhook handlers * Verify payments and update order/transaction state * Handle edge cases (expired payments, under/overpayment, failed confirmations, duplicate webhooks) * Implement secure secrets/config management * Add logs and basic monitoring for payment events * Provide technical documentation + handover Required Experienc...

I'm looking for an experienced blockchain developer to create a smart contract for a DeFi application. The DApp will focus on staking and yield farming. Key Requirements: - Develop a secure and efficient smart contract - Implement staking and yield farming features - Ensure scalability and security Ideal Skills: - Expertise in smart contract development - Experience with DeFi protocols - Strong knowledge of blockchain security practices Please provide examples of previous work and relevant qualifications.

I need a clean, well-commented Solidity contract that accepts and forwards ETH payments on Ethereum mainnet (no ERC-20 support, no extra logic). The goal is to drop the file into my existing gateway flow, compile it in Remix or Hardhat, and deploy without adjustments. Here’s what I expect from you: • A single .sol file written for the latest stable Solidity version • Clear constructor or setup method to set the payout address • receive() / fallback() functions that safely capture any plain-ETH transfer • A withdraw function restricted to the payout address • Minimal gas usage and adherence to current best practices (OpenZeppelin style checks, re-entrancy guard where relevant) • A short README explaining compilation, deployment, and how to call each publ...

– High-Quality Backlinks & Profile Creation for Crypto Trading Bot Store () Job Description: I am looking for a dedicated, white-hat off-page SEO expert to handle link building and authority/profile creation for my crypto trading bot e-commerce website: cryptotradebot.com. About the project is an online store offering algorithmic crypto trading bots that automate trading on major exchanges. The niche is highly competitive (crypto/fintech/Web3), so we need relevant, high-quality backlinks and strategic profile creation to boost domain authority, improve rankings for keywords like “crypto trading bot,” “best AI crypto trading bot,” “automated crypto trading software,” etc., and ultimately drive more organic traffic and sales. Scope of work (init...

Jeg ønsker å lansere en enkel, men robust utility-token på en populær EVM-kompatibel blokk­kjede (f.eks. Ethereum eller BNB Chain). Samtidig vil jeg ha en minimal staking- og mint-plattform som gjør det lett for brukerne å delta – og for meg å administrere tokenøkonomien. Kjernekrav • Smart-kontrakt for selve utility-tokenet (ERC-20 eller tilsvarende). • Staking-kontrakt som beregner avkastning løpende, men lar brukerne kreve ut belønningen manuelt fra dash­bordet. • Mint-funksjon tilgjengelig kun fra et eget admin-dash­bord slik at jeg kan øke sirkulasjonen når det er nødvendig. • Brukervennlig web-dash­bord som viser saldo, påløpte rewards o...

I need a small server-side application that reads a .FIN file, extracts the M0 and M1 fiat balances it contains, converts those balances to USDC/USDT at the current rate, and routes the settlement through Blockchain. Here’s what matters most to me: • Codebase in Python. Please keep the structure clean, modular, and ready for unit tests so future maintenance is painless. • Direct integration with Circle Mint and Tether for issuing and redeeming USDC/USDT. If Circle’s API is temporarily unavailable we can discuss a fallback—Tether’s own API or an exchange gateway like Kraken—but Circle Mint is the primary path. • Accurate parsing of the .FIN format. The file can hold multiple currency rows, so the parser must detect fiat type, pull the M0/...

I would like to improve my token’s ranking to reach the top 10 on Dexscreener within the Solana network.

I am ready to take a theta-based trading idea from whiteboard to production and need a Web3 full-stack partner to carry the build end-to-end. The core features are already defined: real-time trading data flowing into the interface and automated trading algorithms executing on-chain. Everything will run on the Theta blockchain, so familiarity with Theta SDK, solidity-style smart contracts, and its RPC infrastructure is essential. Authentication will be wallet-based (e.g., WalletConnect or a custom Theta wallet integration) so users can sign transactions directly without traditional log-ins. Here is what I expect to see completed: • Responsive front-end (React/TypeScript preferred) that streams live market data and presents intuitive trade controls. • Smart contracts on Theta ...

I want to launch a brand-new crypto coin on its own custom blockchain, then build out everything needed for people to actually use it. The work begins with the chain itself: consensus design, node software, smart-contract capability, a block explorer, and clear tokenomics that leave me free to adjust supply or governance later on. Once the chain is live, I need a companion wallet / exchange app that runs smoothly on iOS, Android, and the Web. Users must be able to store, send, receive, trade, and convert the coin in-app, with security features such as biometric login, 2-factor authentication, and optional cold-storage integration. Finally, the coin has to power in-game purchases inside a first-person-shooter that also offers a lighter casual mode. Think weapon skins, character upgrades, ...

I’m in the full-development stage of a browser-based RPG and now need a developer who can weave solid gameplay together with Ethereum-powered Web3 features. The core game loop, narrative arcs, and art style are already mapped out; what’s missing is the code that turns those ideas into a living, playable experience directly in the browser. Your focus will be to: • Build the front-end gameplay layer (HTML5, WebGL, or your preferred JS game framework) and connect it to a secure back-end. • Integrate Ethereum smart contracts for on-chain assets such as character NFTs, item drops, and marketplace trades. • Ensure wallet connectivity (MetaMask or similar) and smooth signing flows so players stay immersed. • Optimise for quick load times and responsive controls ac...

**Project Title:** Build FIU-Compliant Crypto Exchange Platform for India (Web + Admin Panel)(MOBILE APP) **Project Description:** I am looking for an experienced blockchain development team or individual to build a **secure, scalable, and FIU-compliant cryptocurrency exchange platform** for the Indian market. The platform should support spot trading initially, with scope to expand into futures and margin trading later. --- **Key Requirements:** **1. Core Features:** * User registration & login (Email, Mobile OTP, 2FA) * KYC verification system (Aadhaar/PAN integration preferred) * Wallet system (multi-currency: BTC, ETH, USDT, INR, etc.) * Deposit & withdrawal (Crypto + INR via payment gateway) * Trading engine (real-time order matching) * Spot trading (Market, Limit, Stop o...

I’m building a single, tightly-coupled ecosystem that brings four pillars under one roof: an EV charging network, a full-fledged MLM income engine, an Ethereum-based utility token, and a marketplace where those tokens are spent. The heart of the project is the MLM layer, so every technical decision must protect accurate commission flows and real-time visibility for each role in the hierarchy—sales executives, dealers, distributors and C&F partners. Key flows to cover • EV Charging System: consume the machine’s API and surface real-time charging data alongside the exact kWh used. • MLM Income System: implement commission tracking, recurring income management and sales performance analytics. Device sales pay out 80 % cash and 20 % tokens; the tokens loop ...