backend developer in Web3
Summary
Backend developer on a Web3 project: building blockchain transaction pipelines (nonce/gas/retry handling) and event-driven microservices in Node.js/TypeScript, integrating EVM networks and DeFi protocols via RPC and libraries like ethers.js/viem, at software firm Innowise in Poland.
Описание:
Innowise is a software development company that has implemented more than 1,600 cases for clients from the USA, Denmark, Germany, and other countries.
Задачи:
Strengthen the team and contribute to Web3 backend development.
Требования:
- 5+ Years of commercial experience with Node.js / TypeScript development, including hands-on experience in blockchain / Web3 projects
- Strong understanding of blockchain transaction architecture, including transaction lifecycle, nonce management, gas/fee models, confirmation mechanisms, and transaction resubmission strategies
- Experience integrating with EVM-compatible networks such as Ethereum, Arbitrum, Base, and Polygon
- Experience building transactional pipelines, including queue management, retry mechanisms, and idempotency handling
- Experience working with event-driven microservice architectures using Kafka, RabbitMQ, or SQS
- Experience interacting with blockchain nodes via RPC and understanding the specifics of working with node providers
- Hands-on experience with Web3 libraries such as ethers.js, viem, web3.js, or similar
- Understanding of DeFi protocols, including AMMs, lending protocols, bridging solutions, and on-chain routing mechanisms
- Basic understanding of Web3 security principles, including custodial vs. non-custodial architectures and transaction signing processes
- English proficiency at B2 level or higher
- Nice to have: Experience integrating custodial providers and wallet infrastructure solutions, familiarity with non-EVM ecosystems such as Solana, TON, and Tron, experience working with on-chain indexing solutions such as The Graph or custom-built indexers
- Full-Stack development experience with React, wagmi, and frontend development, familiarity with rollup architectures and interoperability protocols such as LayerZero and Wormhole
Условия:
- Flexible work schedule
- Experience of working with clients all over the world
- Financial assistance
- Medical insurance