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Senior Backend Engineer
Location
Berlin, Germany
Work type
Hybrid
Employment
Full Time
Experience
8+ years
Compensation
Compensation not disclosed
Posted
2d ago
Summary and responsibilities
Role overview
Summary
This role involves end-to-end ownership of backend development, including technology selection, architecture design, and feature implementation for a high-scale auction platform. The engineer will also set code quality standards, development practices, and CI/CD pipelines, while mentoring other engineers and challenging existing workflows.
Your responsibilities
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
What you bring
8+ years in software engineering, 5+ of them focused on backend
Deep TypeScript proficiency, with strong Node.js, NestJS and PostgreSQL experience
A 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, 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
What to expect from us
Hybrid working: 2 days in office, 3 days remote – plus 25 "Work from Anywhere" days per year
28 days annual leave
2× annual career & development conversations
Company pension with 20% employer contribution
Fully paid Deutschlandticket (public transport)
FitX membership or Urban Sports Club subsidy
Virtual stock options — share in the upside
Modern IT setup for your day-to-day work
Structured onboarding with buddy programme and social events
Lived diversity: active women's network, meditation & prayer room
Updated 2d ago
Candidate fit
Skills and qualifications
Additional skills
Experience
8+ years
How this role is positioned
Role classification
Job domains
Industries
Employment
Full Time
Contract duration
Permanent
Hiring type
Direct
Global hiring
Location specific
Offer details
Compensation and benefits
Compensation
Compensation not disclosed
Location, schedule, and role shape
Work setup
Work conditions
Bandwidth profile
Context on the employer
Company snapshot
Company
CarOnSale
Team size
Growing team
Location
Berlin, Germany
CarOnSale is the AI-powered platform for B2B used car trading in Europe. Over 40,000 buyers from more than 20 countries trade on our platform — and 85% of inventory is exclusive to us. We connect software, pricing intelligence, logistics and financing in one layer — as the operating system for an entire industry.
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Senior Backend Engineer
Berlin, Germany • Full Time