Senior Full Stack Software Engineer – React, Node.js

Role Overview

• You’ll join our UI Engineering team and take ownership of full-stack projects that power our adtech ecosystem.
• 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 e. g. 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.

Tech Stack

• AWS
• Grafana
• GraphQL
• JavaScript
• Jenkins
• Jest
• MariaDB
• MySQL
• Node.js
• Postgres
• React
• Shell Scripting
• SQL
• TypeScript

Benefits

• Tech freedom – work with cutting-edge tools (React, Node.js, TypeScript, AWS, Kubernetes, and more).
• Top equipment: choose your setup – Mac, Linux or custom tools
• Remote-first flexibility – work wherever you’re most productive, no micromanagement.
• Continuous learning: Udacity, Coursera, hackathons, conferences & coaching
• Perks that matter – Deutschland-Ticket, JobRad, Urban Sports Club, RTL+ Premium, and fun company events.