You will further develop our existing Shopify apps, ensuring stability, performance and clean code quality
You will design new features and epics that are scalable, maintainable and pragmatic
You will take technical ownership: plan architecture, identify risks early and establish sensible patterns
You will build new Shopify apps — from idea through technical implementation to launch
You will work closely with our Product team: they define the what, you own the how
You will support junior developers through code reviews, pairing/sparring and clear communication
You will help evolve team standards, tooling and processes (testing, reviews, architectural decisions)

Ruby on Rails & React: at least 3 years of production full‑stack experience with a strong sense for architecture and refactoring
Demonstrable mentoring experience (e.g. regular code reviews, enabling juniors, defining standards/best practices)
Solid experience with Git, PostgreSQL and automated testing (RSpec preferred)
Ability to solve complex tasks independently — from refactoring to architectural decisions
Proactive thinker who anticipates information needs and communicates proactively
Very good German (confident spoken, solid written)

Permanent employment contract
Flexible working hours with remote option
Regular feedback
10% of working time freely available for professional development
Fun team events — online and offline
Capital-forming benefits and company pension plan (up to 100% employer contribution)
Bike-to-work scheme and public transport ticket
Urban Sports membership
Mental health platform
Unlimited development opportunities

Senior Full Stack Developer – Ruby on Rails, React

Key skills