Senior Backend Engineer (f/m/x)
Core
Design and implement scalable backend systems for a European B2B used car trading platform, handling 130,000 annual vehicle sales across 20+ countries.
Role type
Senior Backend Engineer (AI-first)
Builds
High-scale auction backend, AI coding agents, and LLM-integrated development workflows
Domain
Automotive B2B trading, AI/ML integration
Deliverable
production ML models | product features
Required skills
TypeScript, Node.js, NestJS, PostgreSQL, Git, Docker, CI/CD pipelines, AI tooling integration, mentorship
Preferred skills
WebSockets, Elasticsearch, Lucene, Automotive domain knowledge, German language
Technologies
TypeScript, Node.js, NestJS, PostgreSQL, Docker, JIRA, Confluence
Responsibilities
Select backend technologies and design system architecture, implement scalable features, set code quality and development standards, mentor engineering team, challenge and improve existing workflows
Seniority
Senior, hands-on IC with mentorship responsibilities
