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# Senior Backend Engineer

- **Company:** CarOnSale
- **Location:** Berlin, Germany (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Apache Lucene, Software Quality, Continuous Integration, Elasticsearch, PostgreSQL, Node.Js, Scrum Methodology, Software Engineering, TypeScript, WebSocket, Real Time Systems, Large Language Models, Backend, Git, Atlassian Tools, NestJS, Docker
- **Published:** August 15, 2026
- **Apply:** https://www.adzuna.de/details/5841938594

## About the Role

* 8+ years in software engineering, 5+ of them focused on backend
 * Deep TypeScript proficiency, with strong Node.js, NestJS and PostgreSQL experience
 * Proven mentorship track record - you have coached engineers and raised the standard around you
 * Solid command of Git, Docker and CI/CD pipelines
 * Comfortable in Scrum or Kanban, working with JIRA and Confluence
 * English at C1 level or above, written and spoken, for daily work with an international team
 * AI-native working style - you use AI tools in your own development workflow and have real judgement about where they accelerate you and where they don't
 * Based in Berlin or ready to relocate

Nice to have:

 * WebSockets or other real-time systems
 * Search frameworks such as Elasticsearch or Lucene
 * Automotive or B2B trading background
 * Conversational German

## Description

* You own backend development end to end: technology selection, architecture design, and implementation of the features that carry platform performance and scale
 * You build AI-first. Coding agents, LLMs and AI-assisted development are part of the daily workflow here, not a pilot project
 * You set the standards: code quality benchmarks, development practices, and CI/CD pipelines, agreed cross-functionally and enforced in review
 * You mentor the engineers around you, share what you know, and raise the bar on backend practice
 * You challenge how we work. When our approach is wrong, you say so and you bring the better one


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