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Senior Fullstack Engineer

Poland🌐 Remote💼 Full-time🗓 2026-05-18 → 2026-09-26

Core

Design, develop, and grow developer-focused tools including web applications, open source CLI/plugins, backend APIs, and AI agents.

Role type

Senior Fullstack Engineer (Developer Tools)

Builds

Web applications, CLI tools, backend APIs, and AI agents for developers

Domain

Developer tools, Open source, AI

Deliverable

production ML models | product features

Required skills

TypeScript, Node.js, React (Suspense-first, SSR/CSR/SSG), PostgreSQL, API design, Authentication/Authorization, System Design, Remote collaboration

Preferred skills

Cloudflare Workers, Row-Level Security, Background job workflows, AI agent development, Observability, Remix/TanStack Router

Technologies

TypeScript, Node.js, React, PostgreSQL, Express.js, Cloudflare, Supabase, Remix, TanStack Router

Responsibilities

Design and implement end-to-end features from design to deployment; Build and maintain web applications and open source tools; Design and secure backend APIs; Integrate with third-party systems; Develop and manage AI agents

Seniority

Senior, hands-on IC

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