Senior Backend Developer

### About the Role A fast-growing, Series A AI search analytics SaaS company based in Berlin is looking for a **Senior Backend Developer** to architect and build the systems powering its AI-driven recommendation engine. You'll work at the intersection of scalable infrastructure and cutting-edge AI integrations, collaborating closely with product, data, and frontend teams to ship reliable, high-quality software. This is a fully on-site role (Berlin office, 5 days/week). The company operates in the AI/ML space, helping marketing teams track, analyze, and optimize brand performance across AI search platforms. Backed by Series A funding and trusted by thousands of brands and agencies, the team is scaling quickly and looking for engineers who thrive in a high-ownership, fast-moving environment. ### What You'll Do * Architect and build backend systems that power real-time AI-driven recommendations. * Design, implement, and maintain scalable REST and GraphQL APIs, data pipelines, and database models. * Integrate with AI model APIs (OpenAI, Claude, Perplexity, Gemini, Llama, and others) to support live recommendation features. * Develop and maintain automated tests (unit and integration) and CI/CD pipelines to ensure quality and rapid delivery. * Enforce security best practices, authentication/authorization, and data privacy across backend services. * Implement end-to-end changes across backend services with clean, maintainable, well-styled code. * Translate product and data requirements into robust technical specifications and solutions. * Leverage AI-assisted development tools (e.g., Cursor) to enhance productivity while keeping committed code concise and maintainable. ### What We're Looking For **Required:** * Deep proficiency in **TypeScript**. * Hands-on experience with **Google Cloud Platform (GCP)**, including Cloud Functions, Cloud Tasks, PostgreSQL, and Firestore. * Proven experience designing and building scalable REST and/or GraphQL APIs and data pipelines for AI-driven features. * Experience integrating with AI model APIs (OpenAI, Claude, Perplexity, Gemini, Llama, etc.) for real-time use cases. * Strong system design and architectural decision-making skills. * Experience implementing automated testing (unit/integration) and CI/CD pipelines. * Knowledge of security best practices, authentication/authorization, and data privacy in backend services. * Ability to match an existing codebase's style 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. **Nice to Have:** * Experience with AI productivity tooling (e.g., Cursor or similar). * Background at companies working in AI/ML infrastructure, LLM tooling, or marketing analytics SaaS. **Visa sponsorship:** Not available. Candidates must be authorized to work in Germany. ### Compensation & Benefits * **Salary:** $75,000 – $120,000 USD annually (or equivalent), depending on experience. * High-ownership role with meaningful impact on a core product used by thousands of brands and agencies. * Work with a technically strong, fast-moving team on problems at the frontier of AI search. ### Location * **Berlin, Germany** — fully on-site, 5 days per week. * Remote work is not available for this role. Find more [English Speaking Jobs in Germany](https://www.arbeitnow.com/english-speaking-jobs) on Arbeitnow