backend developer

A remote-first product studio develops a desktop communication application currently undergoing a blockchain-integration phase, focusing on wallet connectivity, on-chain transactions, smart-contract integration, and payment flows.

• Build user-facing Web3 features including wallet integration for MetaMask, WalletConnect, and Coinbase Wallet;
• Connect frontend to deployed smart contracts by handling read/write operations, ABIs, events, and receipts;
• Manage wallet connect/disconnect, network switching, and account changes;
• Handle transaction states such as pending, confirmed, failed, rejected, replaced, and dropped;
• Display balances, gas estimates, and blockchain data while building clear error and recovery flows;
• Work with RPC providers and indexing services;
• Collaborate with smart-contract and backend developers on integration, code review, and sprint planning;

• Strong professional JavaScript/TypeScript and React skills;
• Experience with Next.js or similar React frameworks;
• Practical Web3/dApp experience using ethers.js, viem, wagmi, or web3.js;
• Experience with browser wallet and WalletConnect-compatible integrations;
• Professional spoken English;
• Nice to have: RainbowKit, Web3Modal, The Graph, Alchemy, Infura, QuickNode, Moralis, custom indexers, Node.js, NestJS, Express, Solidity, smart-contract architecture familiarity, account abstraction, embedded/smart wallets, multi-EVM-chain support, Web3 security awareness, fintech/payments/SaaS background.

• Performance-based salary increases;
• Paid production trial.