<h3>About the Role</h3><p style="min-height:1.5em">Join a small, fast-moving engineering team at a <strong>Y Combinator-backed conversational AI voice startup</strong> building the infrastructure that powers thousands of AI-driven phone calls every day. This is a high-impact, full-stack engineering role where you'll own projects end-to-end, influence core architecture decisions, and work directly alongside customers to ship meaningful product experiences in an AI-first, communications-enabled platform.</p><p style="min-height:1.5em">The company is <strong>on-site in Berlin, Germany</strong> — visa sponsorship is available for the right candidate.</p><h3>What You'll Do</h3><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Work closely with customers to deeply understand their problems and design product experiences that solve real challenges.</p></li><li><p style="min-height:1.5em">Build and scale backend infrastructure capable of handling thousands of concurrent AI phone calls per day.</p></li><li><p style="min-height:1.5em">Craft intuitive front-end user experiences tailored to an AI-first product paradigm.</p></li><li><p style="min-height:1.5em">Own high-stakes projects from initial concept through production launch and post-release support.</p></li><li><p style="min-height:1.5em">Contribute to core architectural decisions alongside a senior, driven engineering team.</p></li></ul><h3>What We're Looking For</h3><p style="min-height:1.5em"><strong>Required:</strong></p><ul style="min-height:1.5em"><li><p style="min-height:1.5em">2+ years of professional software engineering experience.</p></li><li><p style="min-height:1.5em">Strong <strong>PostgreSQL</strong> skills — including complex queries, performance tuning, and optimization.</p></li><li><p style="min-height:1.5em">Experience designing scalable backend architectures and making core product/architectural decisions.</p></li><li><p style="min-height:1.5em">Hands-on experience with <strong>scalable async processing or real-time processing systems</strong>.</p></li><li><p style="min-height:1.5em">Experience building products for <strong>AI-first or communications-enabled platforms</strong>.</p></li><li><p style="min-height:1.5em">Proficiency with <strong>TypeScript, React, Node.js, and/or Python</strong>.</p></li><li><p style="min-height:1.5em">Demonstrated ability to take a product from 0 to 1 and own it end-to-end.</p></li><li><p style="min-height:1.5em">Strong collaboration instincts — comfortable translating customer problems into product decisions with cross-functional teams.</p></li><li><p style="min-height:1.5em">Willingness to work <strong>on-site in Berlin, Germany</strong> (this is a dealbreaker requirement).</p></li></ul><p style="min-height:1.5em"><strong>Nice to Have:</strong></p><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Familiarity with <strong>Temporal.io</strong>, <strong>Twilio</strong>, or <strong>Modal</strong>.</p></li><li><p style="min-height:1.