Senior Backend Engineer (B2B SaaS Startup)

Our MissionJoin us in reshaping global trade in a fast-growing startup! We are traide AI – a VC-backed, B2B deep tech startup based in Berlin, using AI to solve one of the most overlooked yet critical challenges in international trade: customs compliance. Our software automates product classification, reduces regulatory errors, and helps customers save up to 83% of their time. Trusted by leading brands like Siemens Healthineers, Koro, and Jack Wolfskin, we've achieved 2x growth over the past 12 months – and we're just getting started. Your tasksAt traide AI, we believe customs specialists deserve smarter, faster workflows and the future of global trade depends on it. As a Senior Backend Engineer, you'll play a pivotal role in builing robust, AI-powered backend services and infrastructure that drives the value creation for our customers. Your main expertise lies in backend technology but you should not be afraid to contribute to other parts of the application. You'll join a tight-knit, VC-backed B2B startup - calm but ambitious - where your ideas shape both product and culture. Product Development Own the end-to-end delivery of new features and improvements in our web application across the whole stack: shaping everything from technical design to production releaseWrite both client-side and server-side code within our well-established codebasesAnalyse and communicate trade-offs in technical designs in RFC style discussions, drive decisions for your projectsBe the backend expert in rotating project teams, give feedback on the contribution of other team members within your area of expertiseCross-functional collaboration Work alongside designers to shape user flows, evaluate feasibility, and improve interfaces and user experiencePartner with AI engineers to bring cutting-edge research and prototypes into production-ready featuresContribute your perspective to product discussions, helping set direction with both technical and user impact in mindCode quality & technical excellenceSet and uphold high standards for code quality, architecture, and best practices within the team Design and maintain robust automated tests to ensure reliability and quality at scale Develop and improve instructions, guardrails and feedback mechanisms for coding agents Select and configure tooling that improves developer experience and keeps our CI/CD pipeline efficient Proactively identify and solve technical challenges before they become blockers Knowledge sharing Share your expertise through code reviews, mentoring, and documentation — helping others level up and ensuring our knowledge grows as the team grows Who we’re looking forYou're an experienced engineer who cares deeply about craft, but even more about impact. You love clear thinking over hype, and you're energized by the idea of turning AI research into products people actually use every day. 7+ years of hands-on software engineering experience, ideally building complex products in dynamic environmentsBachelor's degree (or higher) in Computer Science or a related disciplineDeep proficiency in TypeScript, including advanced type-level programmingFamiliarity with synchronous and asynchronous communication patterns, HTTP APIs (REST and GraphQL), event-driven architecture, and common design patterns.Solid database skills across both relational and non-relational databases such as Postgres and Redis or similar.Hands-on experience with cloud platforms such as Google Cloud, and the services that typically come with them.You embrace AI tools in your workflow and are driven to master emerging technologiesYou champion code quality and drive best practices across the teamYou thrive in fast-moving environments - seeking opportunities to learn, grow, and both give and receive feedbackStrong English skills (C1 or better); German is a plus but not requiredCuriosity about adjacent fields like DevOps, Security, Frontend development, AI Engineering etc.Our Tech Stack:React & Chakra UI (Component lib