Senior Backend Developer

<h3>About the Role</h3><p style="min-height:1.5em">A fast-growing, Series A AI search analytics SaaS company based in Berlin is looking for a <strong>Senior Backend Developer</strong> 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).</p><p style="min-height:1.5em">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.</p><h3>What You'll Do</h3><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Architect and build backend systems that power real-time AI-driven recommendations.</p></li><li><p style="min-height:1.5em">Design, implement, and maintain scalable REST and GraphQL APIs, data pipelines, and database models.</p></li><li><p style="min-height:1.5em">Integrate with AI model APIs (OpenAI, Claude, Perplexity, Gemini, Llama, and others) to support live recommendation features.</p></li><li><p style="min-height:1.5em">Develop and maintain automated tests (unit and integration) and CI/CD pipelines to ensure quality and rapid delivery.</p></li><li><p style="min-height:1.5em">Enforce security best practices, authentication/authorization, and data privacy across backend services.</p></li><li><p style="min-height:1.5em">Implement end-to-end changes across backend services with clean, maintainable, well-styled code.</p></li><li><p style="min-height:1.5em">Translate product and data requirements into robust technical specifications and solutions.</p></li><li><p style="min-height:1.5em">Leverage AI-assisted development tools (e.g., Cursor) to enhance productivity while keeping committed code concise and maintainable.</p></li></ul><h3>What We're Looking For</h3><p style="min-height:1.5em"><strong>Required:</strong></p><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Deep proficiency in <strong>TypeScript</strong>.</p></li><li><p style="min-height:1.5em">Hands-on experience with <strong>Google Cloud Platform (GCP)</strong>, including Cloud Functions, Cloud Tasks, PostgreSQL, and Firestore.</p></li><li><p style="min-height:1.5em">Proven experience designing and building scalable REST and/or GraphQL APIs and data pipelines for AI-driven features.</p></li><li><p style="min-height:1.5em">Experience integrating with AI model APIs (OpenAI, Claude, Perplexity, Gemini, Llama, etc.) for real-time use cases.</p></li><li><p style="min-height:1.5em">Strong system design and architectural decision-making skills.</p></li><li><p style="min-height:1.5em">Experience implementing automated testing (unit/integration) and CI/CD pipelines.</p></li><li><p style="min-height:1.5em">Knowledge of security best practices, authentication/authorization, and data privacy in backend services.</p></li><li><p style="min-height:1.5em">Ability to match an existing codebase's style and implement changes end-to-end.</p></li><li><p style="min-height:1.5em">Excellent collaboration skills across product, data, and frontend teams.</p></li><li><p style="min-height:1.5em">A demonstrated track record of exceptional performance or notable achievements.</p></li></ul><p style="min-height:1.5em"><strong>Nice to Have:</strong></p><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Experience with AI productivity tooling (e.g., Cursor or similar).</p></li><li><p style="min-height:1.5em">Background at companies working in AI/ML infrastructure, LLM tooling, or marketing analytics SaaS.</p></li></ul><p style="min-height:1.5em"><strong>Visa sponsorship:</strong> Not available. Candidates must be authorized to work in Germany.</p><h3>Compensation &amp; Benefits</h3><ul style="min-height:1.5em"><li><p style="min-height:1.5em"><strong>Salary:</strong> $75,000 – $120,000 USD annually (or equivalent), depending on experience.</p></li><li><p style="min-height:1.5em">High-ownership role with meaningful impact on a core product used by thousands of brands and agencies.</p></li><li><p style="min-height:1.5em">Work with a technically strong, fast-moving team on problems at the frontier of AI search.</p></li></ul><h3>Location</h3><ul style="min-height:1.5em"><li><p style="min-height:1.5em"><strong>Berlin, Germany</strong> — fully on-site, 5 days per week.</p></li><li><p style="min-height:1.5em">Remote work is not available for this role.</p></li></ul><p>Find more <a href="https://www.arbeitnow.com/english-speaking-jobs">English Speaking Jobs in Germany</a> on Arbeitnow</a>