Senior Full Stack Developer (Ruby on Rails / React)

We are looking for a Senior Full Stack Developer who wants to have a real impact on the architecture, code quality, and development direction of applications built with Ruby on Rails and React. We work in a small, experienced team where technical decisions are made close to the code

Tech stack:

Backend: Ruby on Rails, Ruby, PostgreSQL, Redis, REST, GraphQL
Frontend: React, JavaScript (SPA)
Infrastructure: Heroku, GitHub Actions
Testing: RSpec

Responsibilities:

Designing, developing, and maintaining web applications (frontend & backend)
Working with Ruby on Rails (backend) and React / JavaScript (frontend)
Independently delivering complex tickets (features, bug fixes, refactoring)
Taking ownership of selected components and system areas
Ensuring code quality: automated tests (RSpec), code reviews
Collaborating with Product Managers and the Customer Success team
Mentoring junior developers and supporting onboarding
Participating in 2nd level support (on a rotational basis)

Requirements:

Minimum 3–5 years of commercial experience as a Full Stack Developer
Very good knowledge of Ruby on Rails and React
Experience working with SQL / PostgreSQL
Comfortable working with Git
Ability to independently solve problems and make technical decisions
Experience with code reviews and maintaining high code quality
Proactive attitude and strong team communication skills
Knowledge of English sufficient for day-to-day team collaboration B2/C1
Knowledge of German sufficient for day-to-day team collaboration B2/C1

Nice to have:

Knowledge of GraphQL, Redis, Sidekiq

Experience with CI/CD (e.g. GitHub Actions)
Experience in e-commerce / Shopify / SaaS

Recruitment Process Stages:

First introductory meeting – HR Screen
Meeting with lead developers
Case Study – preparation of a technical task
Case Study Presentation
Meeting with the rest of the team

Working conditions:

Work mode: 100% remote, but we have an office in Bochum and a co-working space in Berlin that can be used if needed.
Flexible working hours
Core hours: 9:00–15:00 (CET)
Daily stand-up: 9:15

Job recommendations