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Jobs · Engineering · Connecticut

Senior Full Stack Software Engineer (f/m/d) - React, Node.js

RTL Deutschland · Berlin, CT · 2 mo ago
EngineeringFull-time

About the role

You’ll join our UI Engineering team and take ownership of full-stack projects that power our adtech ecosystem. This isn’t just about coding – it’s about collaboration, technical ownership, and making an impact.

  • Build and maintain modern React frontends and Node.js APIs with TypeScript.
  • Design and implement REST or GraphQL APIs that scale efficiently.
  • Collaborate closely with backend engineers, designers, and product owners to translate requirements into elegant solutions.
  • Write clean, maintainable, and well-tested code – with automated tests as a natural part of your workflow.
  • Contribute to architecture decisions and best practices – we value opinions backed by experience.

Requirements

  • 5+ years of hands-on experience in full-stack JavaScript development.
  • Deep knowledge of Node.js (framework e.g. Koa, Express or Fastify), TypeScript, React and modern web architectures.
  • Solid understanding of relational databases (e.g. MySQL, MariaDB, PostgreSQL or SQL Server), including database design, SQL querying, and REST API development (GraphQL is a plus).
  • A strong sense of code quality with mandatory hands-on experience in testing, including frameworks such as Jest, Vitest, or Node’s built-in testing framework – Clean design and automated tests are not optional.
  • Bonus points for experience with: AWS, Jenkins, Grafana, Graylog, Confluence, Jira, Shell scripting.

Benefits

  • 30 days of vacation + Dec 24 & 31 off.
  • Smart Fridays (4-day workweek possible).
  • Mobility benefits (Germany ticket & JobRad).
  • Sports & health offerings, mental health support.
  • Corporate benefits, RTL+ access, and more.

Ownership over tickets: You’re trusted with real responsibility, not just tasks. No unnecessary bureaucracy, no micromanagement – we rely on you to take things forward.

Build > Talk: We test what works – not what sounds good. Fail fast, learn faster.

High standards, low ego: We take our work seriously, but not ourselves. Direct feedback, honest collaboration, no drama.

Stay sharp: Hackathons, conferences, community – we invest in your growth and keep you at the cutting edge.

Your CV is just the starting point. What matters more to us than your resume: a portfolio, a side project, a demo repo – anything that shows you don’t just talk about code, you ship it. Production-ready. Thought through. Done.

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