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
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Work closely with customers to deeply understand their problems and design product experiences that solve their challenges.
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Build and scale backend infrastructure capable of handling thousands of AI phone calls per day.
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Craft intuitive user experiences tailored to an AI-first world.
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Own high-stakes projects completely — from initial concept through production launch and post-release support.
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Contribute to core product and architectural decisions alongside a small, senior team.
What We're Looking For
Required:
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2+ years of professional software engineering experience.
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Strong PostgreSQL experience, including complex queries, performance tuning, and optimization.
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Experience designing scalable backend architectures and making core architectural decisions.
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Familiarity with TypeScript, React, Node.js, and Python.
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Experience with scalable async processing or real-time processing systems.
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Proven ability to own projects end-to-end, from concept to production and beyond.
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Experience building products for AI-first or communications-enabled platforms.
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Strong collaboration skills — comfortable working directly with customers and cross-functional teams.
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A track record of taking a product from 0 to 1.
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Willingness to work on-site in Berlin, Germany (required).
Nice to Have:
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Familiarity with Temporal.io, Twilio, or Modal.
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Prior experience in a startup or high-growth environment.
Compensation & Benefits
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Salary: €75,000 – €160,000 per year, depending on experience.
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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.
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