Senior Fullstack Software Engineer - Ruby/ Typescript (m/f/d)

Role Summary

• •Lead the development and maintenance of a core Ruby on Rails application focusing on code health and long-term stability.
• •Take ownership of technical implementation in 6-week ShapeUp cycles, from architecture to deployment.
• •Integrate the Rails monolith with satellite TypeScript and GCP services pragmatically without over-engineering.
• •Improve developer experience by resolving tooling, CI/CD, and environment friction.
• •Drive technical standards through documentation, architectural decision records, and thorough code reviews.

About the Company

• •1KOMMA5° is committed to a sustainable energy future, focusing on renewable energy integration with AI-driven systems.
• •The company operates globally with over 3,000 employees across more than 80 locations.
• •They combine regional craftsmanship with scalable software to build a virtual power plant ecosystem.
• •Ambitious with a clear mission to transition 1.5 million households to renewable energy by 2030.
• •The culture values imagination, enthusiasm, and tackling new challenges to make a real impact.

What You Should Know

• •You will join a cross-functional, self-organized team including frontend, backend, product, and UX/UI roles.
• •The role offers a chance to work on cutting-edge renewable energy tech with direct climate impact.
• •Expect a dynamic, international environment with opportunities to learn from highly skilled colleagues.
• •Work location is flexible within Germany with options for remote work and offices in major cities.
• •The company supports a healthy work-life balance with benefits like job bike leasing and wellness programs.

Key Required Skills