Senior Fullstack Engineer (AI-assisted coding)

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Warszawa, Kraków, Gdańsk, Wrocław, Poznań (Poland), Overlap with Central US Time required until 20:00 or 21:00 CESTFull-TimeSenior
Salary8,000 - 12,000 USD per month
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Job Details

Languages
English B2
Experience
6+ years
Required Skills
Node.jsArtificial IntelligenceTypeScriptReactLLMDistributed Systems

Requirements

  • 6+ years of experience building and maintaining production software systems.
  • Strong experience designing and owning complex backend systems.
  • Strong backend engineering skills in TypeScript and Node.js.
  • Experience with asynchronous, event-driven, or workflow-based distributed systems.
  • Experience working with AI or LLM-based systems and process automation, such as Anthropic’s API (Claude) or similar tools.
  • Ability to work with a daily 4–5 hour overlap with the US team (until 20:00 or 21:00 Polish time).
  • Comfortable working with unclear problems and incomplete information.
  • Strong spoken and written English communication skills (B2 level).
  • Self-motivated with a strong sense of ownership and responsibility.

Responsibilities

  • Lead the technical design and development of scalable backend systems.
  • Make and document architecture decisions with clear trade-offs.
  • Create patterns for collaboration between AI systems and human workers.
  • Work closely with operations teams to understand real-world issues and edge cases.
  • Make sure systems are observable, auditable, and safe to run at scale.
  • Identify technical risks early and suggest solutions.
  • Maintain high standards for code quality, testing, and system design.
  • Share knowledge and help improve the team’s technical standards through reviews and collaboration.
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8,000 - 12,000 USD per month
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