Senior Full Stack Developer - Ruby on Rails & React (m/w/d)

Hey there :)

Are you eager to make a real impact in the Shopify ecosystem—with clean code, well-thought-out architecture, and apps that truly help merchants succeed?

Then you’ve come to the right place.

We’re looking for a Senior Full-Stack Developer (Ruby on Rails & React) to strengthen our apps team technically, take on responsibility, and take our Shopify apps to the next level. With us, you’ll not only work on exciting Shopify apps, but you’ll also have the freedom to actively shape technical decisions—from architecture and patterns to mentoring the team.

Your Mission

Further Development & Ownership

- You’ll further develop our existing Shopify apps and ensure stability, performance, and clean code quality

- You’ll design new features & epics—scalable, maintainable, pragmatic

- You’ll take on technical responsibility: planning architecture, identifying risks early, establishing sensible patterns

New Development & Product Collaboration

- You’ll develop new Shopify apps—from the initial idea through technical implementation to launch

- You’ll work closely with our product team: they define the “what,” you’re responsible for the “how”

Mentoring & Team Enablement

- You’ll support junior developers through code reviews, pairing/sparring, and clear communication

- You help further develop standards, tooling, and processes within the team (testing, reviews, architectural decisions)

- You complement our Dev Leads technically and actively contribute to a strong engineering culture

What you bring to the table:

Our Must-Haves:

- Ruby on Rails & React: at least 3 years of productive full-stack experience with a solid grasp of architecture & refactoring

- Demonstrable mentoring experience (e.g., regular code reviews, technical enablement of juniors, standards/best practices)

- Solid experience with Git, PostgreSQL, and automated testing (ideally RSpec)

- You can solve complex tasks independently—from refactoring to architectural decisions

- You contribute ideas, anticipate information needs, and communicate proactively

- You speak very good German (fluent spoken, solid written)

Our Nice-to-haves:

- Experience in Shopify app development

- Experience with GraphQL APIs

What do we offer you?

- Hard facts first: A permanent employment contract, flexible working hours with the option to work remotely, regular feedback, 10% of your working hours dedicated to professional development, fun team events—both online and offline, capital-forming benefits and a company pension plan (up to 100% employer contribution), a company bike and transit pass, Urban Sports membership, a mental health platform, and more!

- Be part of something big: As a leading Shopify agency in Germany, our goal is to be a reliable partner and employer. We support you in working efficiently and promote a healthy work environment

- Unlimited development opportunities: With us, you’re more than just a “cog in the wheel.” You have the chance to continuously learn, try new things, and grow, while your team is always there to support you

- Genuine values and authenticity: We value communication, empathy, and growth. With us, you’ll find an inclusive culture that promotes diversity