Senior Staff Fullstack TypeScript Engineer (Fintech)

Hello Colleagues!

Looking for Senior Staff Full-Stack TypeScript Engineer

-Location: Kraków preferred; candidates from other locations in Poland are also considered
-Type of work: Full-time\Remote.
-Contract B2B .


Building a modern fintech payments platform combining traditional payment rails with crypto infrastructure, covering real-time processing, settlement, reconciliation, and wallet services.

Must have:
• Russian C1, English B2.
• 8+ years of production TypeScript/JavaScript experience across frontend and backend
• Deep React and GraphQL expertise (Apollo Server/Client)
• Strong hands-on experience building and operating AWS serverless systems
• NoSQL at scale (DynamoDB or similar) alongside PostgreSQL
• Experience leading technical direction for teams of 5–15 engineers (architecture, code reviews, mentoring)
• Proficiency with AI-assisted development tools, including 1+ year of experience with Anthropic Claude

Nice to have:
• Payments/fintech experience (settlement, PCI compliance, ledger systems, fee models)

Additional details:
• Location: Kraków preferred; candidates from other locations in Poland are also considered
• Hands-on IC role with daily coding, architectural decisions, and end-to-end technical ownership
• Stack: TypeScript, React 19, Node.js, GraphQL/Apollo, AWS, DynamoDB, PostgreSQL, Playwright, CDK