Play an active role in developing new features for mobile app users, designed with high performance and scalability in mind.
Collaborate with app engineers to define API contracts and optimize data flows.
Drive backend performance through testing, monitoring, and robust CI/CD practices.
Architect and develop event-driven microservices using RabbitMQ.
Build and evolve our Backend for Frontend (BFF) layer to meet mobile-specific needs.
Ensure software quality through automated tests (TDD/BDD preferred).
Participate in architectural discussions and technical decision-making.
Engage in a culture of feedback, openness, and team collaboration.

You demonstrate seniority through impact, proactivity, and ownership, not just years of experience.
You have proven expertise in TypeScript, Node.js, and Nest.js, with hands-on experience delivering production systems focused on API-first and scalable architectures.
You are comfortable with Python, with bonus points for experience in AI/ML-powered personalization or recommendation systems.
You possess a DevOps mindset, with experience using Docker, Kubernetes, and CI/CD pipelines.
You are experienced in building robust APIs and event-driven architectures.
You are familiar with security best practices (OAuth2, JWT, encryption, secrets management) and observability tools.
You value clean code, strong test coverage, and continuous improvement.
You thrive as a team player in a feedback-driven, collaborative culture.

Sports: Stay healthy. Benefit from a membership (M) package at Urban Sports Club, giving you access to a wide range of sports and fitness offers.
Mental Health: Receive quick, professional support from psychologists at Likeminded if you feel overwhelmed in your private or professional life. Anonymous and free of charge.
Work from Home: If your role does not require office presence, we can arrange your workplace individually — including up to 20 days per year anywhere in the EU.
Mobility: We provide employees with a fully funded Deutschlandticket for unlimited use.
Personal development: Grow! We support and encourage your individual development through various internal and external trainings. And many more :)

Senior Backend Engineer, App

Key skills