Software Engineer

About the role

About the Role Join a small, fast-moving team at a Y Combinator–backed conversational AI SaaS startup building an AI voice platform that automates customer call operations at scale for B2C companies. You'll work on a product that handles thousands of AI-powered phone calls every day — spanning sales, support, and operations — and you'll do it in person alongside a sharp, low-ego team in Berlin. This is a high-ownership, end-to-end engineering role. You'll shape core architecture, ship features with speed, and work directly with customers to turn real problems into elegant product experiences. What You'll Do Work closely with customers to understand their challenges and design product experiences that genuinely solve them. Build scalable backend infrastructure capable of handling thousands of concurrent AI phone calls per day. Create intuitive, AI-first user experiences on the frontend. Own high-stakes projects end-to-end — from initial concept through production launch and post-release support. Contribute to core architectural decisions that shape the direction of the platform. What We're Looking For Required 2+ years of professional software engineering experience. Proficiency with TypeScript, React, Node.js, and Python . Strong PostgreSQL experience. Proven ability to design scalable backend architectures and make meaningful product/architectural decisions. Experience taking a product from 0 to 1 — you've built something from the ground up. Ability to own projects end-to-end: concept → production → post-release support. Strong collaboration skills — you're comfortable working directly with customers and cross-functional teammates to translate problems into solutions. Nice to Have Familiarity with Temporal.io , Twilio , or Modal . Experience with scalable async or real-time processing systems. Background building products for AI-first or communications-enabled platforms (e.g. voice, telephony, conversational AI). Compensation & Benefits Salary: $75,000 – $160,000 USD annually (depending on experience) Visa sponsorship available Early-stage equity opportunity Work at a well-funded, high-growth startup backed by top-tier investors Location This role is on-site in Berlin, Germany . We're looking for people who are genuinely excited to work in person with the team — not a remote-first environment.