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

RTL Deutschland is a company that values remote work while also emphasizing collaboration during key projects. The Senior Full Stack Software Engineer will join the UI Engineering team, taking ownership of full-stack projects that enhance the adtech ecosystem, focusing on coding, collaboration, and making impactful contributions.

Responsibilities:

• 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
• Experience with AWS
• Experience with Jenkins
• Experience with Grafana
• Experience with Graylog
• Experience with Confluence
• Experience with Jira
• Experience with Shell scripting