Senior Backend Developer

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., * 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.

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.

• 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.