Senior Backend Engineer

What you’ll do Take ownership of complex backend systems end-to-end - from scoping and architecture to high-quality, reliable delivery Design and build robust, scalable APIs and distributed systems that power our products and deliver exceptional performance Collaborate closely with Product, Frontend, and Design teams to translate product ideas into well-architected backend solutions Push the boundaries of what’s possible with modern backend technologies, driving innovation in both architecture and developer experience Contribute to evolving our backend architecture, infrastructure, and developer tooling to support rapid iteration at scale Proactively identify opportunities to improve system performance, reliability, and developer experience - and drive those initiatives through to execution What we’re looking for 5+ years of professional backend engineering experience, ideally in fast-paced startup or high-growth environments Deep expertise in TypeScript and modern backend frameworks, with a proven track record of building and scaling production systems Experience designing and implementing APIs (REST, GraphQL, or gRPC) that power user-facing products Strong experience working with SQL databases (e.g. PostgreSQL), including schema design, query optimization, and data modeling for production systems Familiarity with cloud-native architectures, ideally on GCP (e.g. Cloud Functions, Cloud Tasks, Firestore) Familiarity with DevOps practices, CI/CD pipelines, and infrastructure-as-code Strong communication skills and a high sense of ownership - able to operate with autonomy while staying aligned with team goals Some markers of excellence, which could also be non-work related, like having a high FIDE rating Most importantly: we care deeply about working with genuinely kind, collaborative, and hard-working people who make the team better through empathy and openness Tech Stack Languages: TypeScript Backend: GCP, Cloud Functions, Cloud Tasks, RabbitMC, Firestore, PostgreSQL, Elasticsearch AI Models: OpenAI, Claude, Perplexity, Gemini, Llama, etc. Bonus Points You’ve personally built and scaled a system (e.g. side project, startup, open-source) that handled significant traffic or complexity, and learned real lessons from it Background working on AI products or data-heavy applications Academic background in Computer Science or a related technical field Experience in starting a company or working at a top-tier high-growth startup What we offer Exciting and challenging work with real impact and ownership at one of Europe’s fastest-growing Series A startups Regular team events and off-sites Aggressive equity compensation package Paid Dinner & Uber home when working late The most beautiful office space and work environment in Berlin