Software Engineer

About the Role Join a small, fast-moving engineering team at a Y Combinator-backed AI voice platform startup building the infrastructure that powers thousands of AI-driven conversations every day. You'll work directly with customers, own projects end-to-end, and have a real say in core architecture decisions — all within a high-ownership, in-person culture in Berlin. This is a high-impact opportunity for a full-stack engineer who thrives at the intersection of scalable backend systems, real-time communications infrastructure, and modern AI-first product experiences. What You'll Do Work closely with customers to deeply understand their problems and design product experiences that solve their challenges. Build and scale backend infrastructure capable of handling thousands of AI phone calls per day. Craft intuitive user experiences tailored to an AI-first world. Own high-stakes projects completely — from initial concept through production launch and post-release support. Contribute to core product and architectural decisions alongside a small, senior team. What We're Looking For Required: 2+ years of professional software engineering experience. Strong PostgreSQL experience, including complex queries, performance tuning, and optimization. Experience designing scalable backend architectures and making core architectural decisions. Familiarity with TypeScript, React, Node.js, and Python . Experience with scalable async processing or real-time processing systems. Proven ability to own projects end-to-end, from concept to production and beyond. Experience building products for AI-first or communications-enabled platforms. Strong collaboration skills — comfortable working directly with customers and cross-functional teams. A track record of taking a product from 0 to 1. Willingness to work on-site in Berlin, Germany (required). Nice to Have: Familiarity with Temporal.io, Twilio, or Modal . Prior experience in a startup or high-growth environment. Compensation & Benefits Salary: €75,000 – €160,000 per year, depending on experience. Visa sponsorship available. Location This role is on-site in Berlin, Germany . Candidates must be willing and able to work in-person at the Berlin office. Visa sponsorship is available for the right candidate.