Pametne pogodbe Jobs

⚡️ CALLING ALL CRYPTO-ANARCHISTS & EVM ARCHITECTS ⚡️ Project: The Sovereign Swap Genesis (Phase 1) Forget the $175—we’re here to build the bedrock of permissionless atomic settlement. We are looking for a high-signal Solidity engineer to architect the Sovereign Atomic Swap on Bitnet Money (Sovereign PoW EVM). This isn’t a standard "copy-paste Uniswap" job. This is a research-grade MVP focused on Ownerless Logic, Atomic Finality, and the future of ZK-integrated trustless swaps. If you dream in Opcodes and believe that onlyOwner is a centralized vulnerability, this is your playground. THE ARCHITECTURAL MISSION The objective is to deploy a purely decentralized, non-custodial HTLC (Hashed Time-Lock Contract) on Chain ID 210. We are stripping away the "ad...

Our DApp is live but two areas still misbehave: actions inside the user dashboard do not respond, and token balance / transfer calls occasionally fail or return stale data. I need you to step into the existing React-based codebase, pinpoint what is blocking those interactions, and commit clean, well-documented fixes. You will have direct access to the current repository, smart-contract ABIs, and a staging RPC. The workflow I picture is: • Audit the user-dashboard components, track where clicks or dispatches stall, and restore full responsiveness without breaking current styling. • Trace the Web3 provider hooks that fetch balances and send transfers, correct any state-management or contract-call logic so balances update in real time and transfers resolve every time. • S...

I hold a balance of BTT (“BTTold”) that is still sitting on its original base chain. My goal is to move those tokens onto the Tron network and complete the official swap into the new BTT version. Here is where I currently stand: • The wallet has never—or at least not knowingly—been linked to an exchange, so I may need guidance on that step. What I need from you is a clear, hands-on walkthrough that gets me all the way from “tokens on the base chain” to “new BTT safely in my TronLink wallet (or directly on an exchange account if that is the smoother route).” Acceptance criteria 1. I can see the migrated BTT in my wallet or exchange balance. 2. Transaction hashes are shared so I can independently verify each move on the blockchain...

Senior Full Stack Developer (Fintech / Web3 Product) We are looking for a senior freelance developer to join an active digital product currently under development, focused on digital payments infrastructure, wallet experience, and blockchain-based transactional operations. The project already has a functional technical base and requires someone able to quickly understand an existing architecture, identify critical points, and contribute with solid technical solutions from both engineering and product perspectives. We are not looking for isolated task execution, but for strong technical judgment, scalability mindset, and the ability to solve real product challenges where frontend, transactional logic, and user experience are closely connected. Required Profile Proven senior experience ...

Our dApp’s React-based frontend is live, but the UI stalls whenever it talks to our smart contracts—data can take seconds to appear, and some calls never resolve. Wallet connection and basic transaction flow are in place, yet my top priority is tightening the UI interaction layer so every contract read or write feels instant and reliable. You’ll start by cloning the existing repo, running the current build, and profiling exactly where the slowdown happens. From there, I need you to refactor or replace the offending code—whether that means reworking our hooks, introducing multicall batching, tidying up state management with Redux or Zustand, or simply catching silent promise rejections. The goal is clear: no more sluggish updates, no unhandled errors, and an interf...

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...

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...