Intermediate Software Engineer – Blockchain Integration

This is a fully remote position, open to applicants in Poland.

📋 Description

• Design and sustain smart contracts, on-chain logic, and services that link platform components to blockchain functionalities.

• Contribute to the blockchain developer tooling layer (MCP servers, chain APIs) that supports AI Agent and platform teams.

• Work collaboratively with the team lead and senior engineers on technical design aspects.

• Take ownership of feature implementation from the design phase through testing and deployment.

• Engage in code reviews and create automated tests.

• Ensure quality across both on-chain and off-chain components.

• Diagnose transaction failures, contract interaction problems, and integration bugs within distributed systems.

• Document implementation specifics and assist in creating technical diagrams as necessary.

⛳️ Requirements

• 2-4 years of experience in blockchain development, focusing on smart contracts, dApps, on-chain logic, or blockchain services.

• Proven experience in implementing and testing smart contracts in production or near-production settings.

• Strong grasp of blockchain principles (transactions, wallets, gas models, on-chain state, contract interactions).

• Experience with direct blockchain interactions (contract calls, event handling, transactions, and error recovery).

• Familiarity with blockchain developer tools or integration layers (SDKs, MCP servers, chain interaction APIs).

• Solid engineering fundamentals (clean coding practices, testing, and debugging of distributed systems).

• Proficiency in at least one backend programming language and API development.

• Experience with Docker and applications based on microservices.

• Excellent communication and collaboration abilities, including conveying technical trade-offs.

• Drive to develop profound expertise in blockchain technology.

• Experience in building backend services using Node.js/TypeScript or Python (preferred).

• Practical experience utilizing AI-assisted development tools (Cursor, Claude Code) (preferred).

🏝️ Benefits

• 30 paid days off annually — take them at your convenience for vacations, holidays, or personal time.

• 5 paid sick days, along with up to 60 days of medical leave, and 6 paid days off each year for significant family events such as weddings, funerals, or childbirth.

• Partially covered health insurance post-probation, plus a wellness bonus for gym memberships, sports nutrition, and similar needs after six months.

• Enhance your skills through English lessons, online training, conferences, and the opportunity to explore new career paths.