Senior Backend Engineer (m/w/d)

CarOnSale; München; Presencial; EUR 90.000 - 130.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Work from Anywhere days

Annual leave 28 days

Career & development conversations

Company pension 20% employer contrib.

Deutschlandticket

Fitness subsidy

Stock options

Modern IT setup

Buddy onboarding

Diversity network

Descripción de la vacante

United States Digital Space LLC in Munich is seeking a senior backend engineer to own the backend architecture and deployment, selecting technologies and setting standards for the scalable auction platform serving thousands of buyers.

You will work with AI-first development, mentor peers, and shape engineering practices; based in Munich, you will collaborate with an international team using TypeScript, NestJS, and PostgreSQL.

Formación

• 8+ years in software engineering with at least 5 years backend.

Responsabilidades

• You own backend development end to end: tech selection, architecture design, and feature implementation for performance and scale.

Conocimientos

Backend development

TypeScript

Node.js

NestJS

PostgreSQL

Mentorship

AI-native development

Software architecture

English (C1)

Herramientas

Git

Docker

CI/CD pipelines

JIRA

Confluence

WebSockets

Descripción del empleo

You don't want another role where someone else owns the architecture and you own the tickets. Here you pick the technology, design the architecture, and set the standards the backend runs on. 40,000 buyers, 20+ countries, 130,000 vehicles sold a year through one auction backend, and you decide how it scales.

Location

Central Munich

About us

the company 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.

*One Platform. One Profit Engine.*

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 Munich

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

• 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