backend developer

The company builds a Web3 analytics and portfolio management platform that helps users track assets, transactions, and DeFi positions across multiple blockchain networks. The platform aggregates blockchain data into a single dashboard, providing portfolio insights, transaction history, real-time alerts, and automation tools to simplify portfolio management and make blockchain data more accessible.

• Develop backend services and business logic;
• Design APIs, databases, and system architecture;
• Integrate wallets, blockchain networks, and external APIs;
• Work with transactions, smart contract calls, and on-chain data;
• Support deployment, monitoring, and production stability.

• Proficiency in Node.js and TypeScript;
• Experience with NestJS, Python, Express, or Fastify;
• Knowledge of PostgreSQL, MongoDB, and Redis;
• Understanding of REST, GraphQL, and WebSocket;
• Skills in Docker, Linux, Git, and CI/CD;
• Experience with backend architecture, scalable systems, and production applications;
• Knowledge of EVM networks, blockchain transaction flows, and smart contract interaction;
• Proficiency with ethers.js, viem, or web3.js;
• Understanding of RPC providers, events, and wallets;
• Basic knowledge of DeFi including swaps, staking, liquidity, bridges, and tokens;
• English B2;
• Nice to have: Master's or PhD in CS, Solidity, Hardhat, Foundry, OpenZeppelin, React, Next.js, cloud infrastructure experience, UI designing skills, on-chain data indexing, fintech, SaaS, or crypto product experience.

• Salary 4000—6000$ for Middle and 6500—10000$ for Senior level.