Responsibilities
- Take complete ownership of user-facing features, spanning backend logic in modern Java/Spring Boot and frontend interfaces built with React and TypeScript, connected through GraphQL and REST APIs.
- Champion AI-assisted development by leveraging tools such as Cursor, Claude, or Gemini to speed up coding tasks like scaffolding, refactoring, and test creation, while ensuring code remains secure, maintainable, and architecturally sound.
- Lead architectural advancements by guiding the transition to a multi-module Spring Modulith design, improving performance of PostgreSQL and Elasticsearch queries, and working with domain-specific RDF-based semantic data models.
- Improve engineering standards by enforcing comprehensive test coverage using JUnit, Testcontainers, and Playwright, reviewing merge requests rigorously—including AI-generated code—and providing guidance to less experienced developers.
Compensation
€75,000 – €100,000 per year
Work Arrangement
Hybrid
Team
High trust, flat hierarchies, and an environment where your decisions directly shape the product
Why you’ll love working here
- Opportunities to grow into a Technical Lead or deepen expertise in semantic data, AI features, or platform architecture as the company scales.
- Work from a newly renovated office in the KölnTurm with panoramic city views, exceeding even those of the Cologne Cathedral, combined with flexible hybrid work options.
- Access to exclusive industry events hosted in-house to support professional networking and community engagement.
- Annual fixed salary range of €75,000 to €100,000 for a full-time permanent position.
- 30 days of paid vacation, a personal learning budget, choice of development hardware (Mac, Linux, Windows), and a choice between a subsidized Urban Sports Club membership or a €50 monthly City Plus Card.
- A culture built on empowerment, autonomy, and direct impact on product development.
Not ticking every box?
- Applications are welcome even if not all qualifications are met; potential, curiosity, and motivation to learn are prioritized over rigid checklists.
- Commitment to building a diverse and inclusive team, with special encouragement for women and individuals from underrepresented backgrounds in tech, science, and data fields to apply.
Other
- On-site presence in Cologne or North Rhine-Westphalia is mandatory; fully remote work is not supported.
- Flexible hybrid work model available.
- 30 days of paid vacation included.
- Personal learning budget provided.
- Choice of preferred development hardware: Mac, Linux, or Windows.
- Option to select either a subsidized Urban Sports Club membership or a €50 monthly City Plus Card.
- Work environment characterized by high trust, minimal hierarchy, and meaningful influence on product direction.
- Business-level fluency in English is required; German language skills are highly advantageous.
