Senior Backend Developer

About the Role A fast-growing, Series A-backed AI search analytics company in Berlin is looking for a Senior Backend Developer to architect and build the systems that power its AI-driven recommendations platform. You'll work at the intersection of scalable backend engineering and cutting-edge AI integrations, collaborating closely with product, data, and frontend teams to deliver reliable, high-performance insights for marketing teams worldwide. Formal degrees or fixed years of experience are not required — demonstrated excellence and the ability to move fast are what matter most. What You'll Do Architect and build backend systems powering AI-driven recommendations. Design, implement, and maintain scalable APIs, data pipelines, and databases delivering reliable analytics insights. Collaborate with product, data, and frontend teams to translate requirements into robust technical solutions. Develop and maintain automated tests and CI/CD pipelines to ensure quality and rapid delivery. Integrate with AI model APIs (OpenAI, Claude, Perplexity, Gemini, Llama) to support real-time recommendations. Ensure security, authentication/authorization, and data privacy across backend services. Implement end-to-end changes across backend services with clean, maintainable code. Build and scale REST/GraphQL APIs and data models to support AI-driven product features. Actively leverage AI-assisted developer tools (e.g. Cursor) to enhance productivity while keeping committed code concise and clear. What We're Looking For Required: Deep proficiency in TypeScript . Hands-on experience with the core stack: GCP (Cloud Functions, Cloud Tasks), PostgreSQL, Firestore . Experience integrating with AI model APIs such as OpenAI, Claude, Perplexity, Gemini, and/or Llama for real-time use cases. Strong system design and architectural decision-making abilities. Experience designing and building scalable REST and/or GraphQL APIs , data pipelines, and data models. Experience implementing automated testing (unit/integration) and CI/CD pipelines . Solid knowledge of security best practices, authentication/authorization, and data privacy. Ability to match the code style of an existing codebase and implement changes end-to-end. Excellent collaboration skills across product, data, and frontend teams. A demonstrated track record of exceptional performance or notable achievements in past projects. Willingness to work on-site full-time in Berlin, including extended hours when needed. Compensation & Benefits Salary: €75,000 – €120,000 per year, depending on experience. Work at the cutting edge of AI and search analytics in a high-growth, well-funded startup environment. Location Berlin, Germany — fully on-site, 5 days per week in the office. Visa sponsorship is not available for this role. Find Jobs in Germany on Arbeitnow