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SEAMLESSCHEX·Kraków Old Town, Poland·onsite

Senior Staff Engineer | Tech Lead - Full-Stack TypeScript (Fintech)

Posted 1 month ago
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Ruby on RailsReactTypeScriptJavaScript

About the role

What you'll do

  • Lead technical direction and make architectural decisions for a significant part of the fintech platform.
  • Develop across the full stack including React admin dashboards, GraphQL APIs, and AWS serverless infrastructure.
  • Mentor and guide a team of 5–15 engineers while writing production code daily.
  • Work on a plugin-based TypeScript monorepo with real-time payment processing and crypto wallet infrastructure.
  • Ensure system quality with a comprehensive E2E test suite and CI/CD pipelines gating every deployment.

What you should know

  • This role is for a technical leader who codes daily, not a management-track position drifting from hands-on work.
  • Expect to work with a fast-moving codebase where reading existing code is crucial at the start.
  • Leverage AI-assisted development tools extensively to multiply productivity.
  • You'll own problems end-to-end, from database schema design to infrastructure and testing.
  • Strong experience in payments or fintech systems, including PCI compliance and settlement flows, is a strong advantage.

About the company

  • Paynote is a self-funded fintech startup focused on bridging legacy financial systems with modern payment infrastructure.
  • Backed by a 13+ year established ISO and led by industry veterans with deep payments experience.
  • Values building useful systems and shipping customer-ready improvements quickly over arbitrary investor metrics.
  • Emphasizes direct communication and ownership with minimal process layers between engineers and production.
  • Operates in the payments and crypto infrastructure space with a focus on long-term customer value.

Key required skills

TypeScriptReactGraphQLAWSDynamoDB - databasePostgreSQL - databaseNode.jsCI/CDPlaywright - testing

Summary generated from the original posting.