Hợp đồng thông minh Jobs

I need a complete installation and configuration of a private Hyperledger Besu network whose main job is reliable data storage and sharing. I have servers ready (cloud or on-prem) and want a clean, repeatable setup that lets me add nodes later and expose standard JSON-RPC and WebSocket endpoints. Scope of work • Install the latest stable Besu release on 3+ nodes (validator and non-validator) • Create a custom genesis file, bootnodes list, and network ID • Enable data-storage–focused consensus (IBFT or Clique—whichever you recommend for fast confirmation) • Configure basic account permissioning and privacy groups if they help our data-sharing use case • Expose HTTP & WS APIs with CORS and authentication where needed • Deploy a sampl...

Research Focus: Improving Proof of Work (PoW) efficiency and cross-chain confidentiality via zk-SNARKs. The Groundfloor Opportunity: This project represents a unique opportunity to lead the research and implementation of ZK-SNARKs on a nascent PoW chain. We are aiming to achieve what Zcash did for privacy and what Bitcoin Cash sought for utility, but at a "Groundfloor" level on a Sovereign EVM. As a lead architect, you will not just be coding; you will be officially improving the Bitnet Money blockchain's privacy infrastructure, establishing a reference standard for trustless OTC exchange before the ecosystem scales. Introduction: Polygon proved that you could take the standard Ethereum Virtual Machine and wrap it in a zero-knowledge proof layer to achieve instruction-leve...

I am building out the core of a new product on the Solana blockchain and need a seasoned engineer to write, test, and deploy custom smart contracts. Your job is to translate a set of functional requirements into secure, efficient on-chain programs, then walk me through deployment and version control so I can maintain the codebase moving forward. The role is 100 % Solana focused, so I expect fluency with Rust, Anchor, the Solana CLI, and standard auditing tools. If you also enjoy crafting full dApps or connecting on-chain logic to existing back-end services, that will be useful down the line, but for this phase the deliverable is solely the smart contract layer. Deliverables – Well-documented Rust/Anchor smart contracts that satisfy the functional spec – Local and test-net d...

Project Title Senior Android + Blockchain Developer Needed to Complete Multi-Chain Crypto Wallet (NEXA BULL) with MLM Integration Project Overview We are developing a multi-chain Android crypto wallet application named "NEXA BULL". The initial Android project structure and basic functionality are already developed, but several features still require completion, optimization, and full integration. We are looking for a highly experienced Android + Blockchain developer to complete the wallet and integrate it with our MLM website backend system. The wallet should function similarly to leading crypto wallets such as SafePal Wallet, Trust Wallet, and MetaMask, supporting multiple networks, tokens, live prices, and secure wallet management. Current Project Status The Android app has alr...

I have a bep20 token and require 2 options that both need to be included in the smart contract so users have 2 options to claim tokens: 1) Simple smart contract function on bsc where users send bnb to the contract address and receive project tokens in exchange. 2) Need users to interact with the smart contract by using a web3 function as simple as possible and get a set amount of tokens per claim and I need in this contract to take a small fee on top of gas that is to be deducted when user calls contract to claim tokens. This small fee will be sent to admin wallet for each transaction but this will not include gas (small fee will land in admins wallet each tx). I need for this all to be 1 transaction for the user so they call the contract from my website and metamask,...

I'm building Xrealy Ledger (XRY), a decentralized settlement infrastructure for financial institutions. I need expert assistance in three key areas: WASM-Based Programmability: - Smart contract deployment - Custom transaction processing - Integration with external APIs Regulatory-Native Privacy Enhancements: - Data encryption - User anonymity - Compliance with regulations Setting Up Decentralized Settlement Infrastructure Ideal skills and experience: - Proficiency in WASM and smart contract development - Strong background in cryptography and privacy protocols - Experience with decentralized finance (DeFi) infrastructures - Knowledge of regulatory compliance in the financial sector Looking for a developer who can work on all three aspects effectively. Dear ...

I’m building a distributed network where natural-language AI agents can discover each other, exchange insights, and tap into spare GPU capacity offered by compute providers. The immediate target is a functional MVP that clearly demonstrates enhanced AI-agent collaboration—our primary goal—within one month. What’s needed now is a peer-to-peer coordination layer that registers agents and compute nodes, matches them in real time, and records usage on-chain. Smart contracts (EVM-compatible) will govern identity, staking, and reward distribution, while a REST or GraphQL gateway plus a lightweight SDK will let developers plug their NLP models into the network with minimal effort. Docker-based reference nodes and clear step-by-step documentation should make it simple for ...

Freelancer Needed – Advanced On-Chain Gambling Protocol with Liquidity Pool, Fully Operational Arbitrage Engine, Railway Backend Compatibility, and Optional Complete Automation I am seeking a highly experienced blockchain developer to finalize, secure, and deploy my on-chain Gambling system. The project already has a working base structure (Telegram bot + smart contract framework), but it must now be transformed into a fully operational, production-ready decentralized protocol with sustainable liquidity mechanics, integrated arbitrage logic, and a backend fully compatible with Railway. This is not a basic betting application. The objective is to build a mathematically sound, automated, liquidity-backed on-chain betting system that functions independently and does not require manual...