/Senior Full-Stack Engineer (AI App Builder)

Senior Full-Stack Engineer (AI App Builder)

Warsaw, Europe, PLplvia direct
// Job Type
Full Time
// Salary
Not disclosed
// Posted
3 months ago

About the Role

<p><strong>About Us</strong></p><p>Our client is building an AI App Builder — a platform that allows anyone to create functional applications through natural interaction with AI. Users describe their ideas — and the system builds the app.</p><p>Their small, high-impact team is shaping the foundation of the product: architecture, interface, and AI integration layer. They’re looking for an experienced engineer with strong leadership skills, technical vision, and hands-on experience in AI-related projects, someone who can see the full picture — from code to product — and drive the team toward clean, scalable solutions</p><ul style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;white-space:normal;color:rgb(0, 0, 0);"><li><p>Preference for Russian-speaking engineers with experience in Western AI products</p></li></ul><p style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;white-space:normal;color:rgb(0, 0, 0);"><strong>Responsibilities</strong></p><ul style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;white-space:normal;color:rgb(0, 0, 0);"><li><p>Lead the design and development of core platform features — from concept to production</p></li><li><p>Define technical architecture for both frontend and backend systems, ensuring scalability and stability</p></li><li><p>Collaborate with AI engineers and product designers to turn ideas into reliable, user-ready functionality</p></li><li><p>Take ownership of engineering quality, process efficiency, and release cadence</p></li><li><p>Mentor and guide other developers; participate in technical decision-making and planning</p></li><li><p>Continuously improve system performance, UX, and developer workflows</p></li></ul><p style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;white-space:normal;color:rgb(0, 0, 0);"><strong>Requirements</strong></p><ul style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;white-space:normal;color:rgb(0, 0, 0);"><li><p>5+ years of professional experience as a Full-Stack Engineer or Tech Lead</p></li><li><p>Expertise in React / Next.js / Vue, TypeScript, and Node.js</p></li><li><p>Strong understanding of API architecture, databases, and modern development tooling</p></li><li><p>Experience working with serverless / edge environments (Cloudflare Workers, AWS Lambda, etc.)</p></li><li><p>Practical exposure to AI-driven products (builders, agents, generative apps, etc.) — even up to one year is valuable</p></li><li><p>Demonstrated leadership, ownership, and product vision — not just executing tasks but shaping direction</p></li><li><p>Experience building fast-moving products from scratch in startup environments</p></li></ul><p style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;white-space:normal;color:rgb(0, 0, 0);"><strong>Nice to Have</strong></p><ul style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;white-space:normal;color:rgb(0, 0, 0);"><li><p>Familiarity with LLM APIs (OpenAI, Anthropic, Mistral, etc.)</p></li><li><p>Experience with Supabase, Docker, AWS, Vercel, or Cloudflare AI</p></li><li><p>Background in real-time collaboration, Web IDEs, or AI agent architectures</p></li></ul><p style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;white-space:normal;color:rgb(0, 0, 0);"><strong>Why Join Us</strong></p><ul style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;white-space:normal;color:rgb(0, 0, 0);"><li><p>Build at the edge of AI innovation — creating tools that help others build with AI</p></li><li><p>Influence not just the codebase but the entire direction of the product and engineering team</p></li><li><p>Work in a lean, ambitious environment with full autonomy and real impact</p></li><li><p>Become part of the core leadership group shaping a platform designed to redefine how software is created</p></li></ul>

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