Fullstack Software Engineer - Ruby/ Typescript
1KOMMA5°
Seniority
Senior
Model
Remote
Sector
Salary
Undisclosed
Contract
Full-Time
About the role
You'll be a senior software engineer developing 1KOMMA5°'s core business platform that streamlines renewable energy installations for homes and businesses worldwide. Working in a cross-functional team, you'll help build scalable solutions that integrate solar, batteries, heat pumps, and e-mobility into an intelligent energy system.
What you'll do
- Develop and maintain the core Rails application with focus on code health, modern patterns, and long-term stability
- Lead technical implementation for complex projects within 6-week ShapeUp cycles, owning architectural design through shipping
- Build pragmatic connections between Rails monolith and satellite TypeScript/GCP services
- Proactively identify and resolve friction in tooling, CI/CD, and local development environments
- Drive high-quality async collaboration through clear documentation, ADRs/RFCs, and comprehensive code reviews
What you'll need
- Proven experience writing maintainable, testable code with Rails and other major back-end or full-stack technologies
- Experience designing and maintaining RESTful APIs
- Experience with measuring and improving performance
- Agile and result-oriented mindset with passion for supporting team colleagues
- Excellent knowledge of spoken and written English
- Residency in Germany
Nice to have
- Interest or experience in human-centered software development
- German language skills
What they offer
- Remote work across Germany with offices in Hamburg, Berlin, or Munich
- Direct impact on climate change through energy transition work
- EGYM Wellpass for health and wellness benefits
- Futurebens benefits and discounts platform
- Job bike leasing for city bikes or e-bikes
- Direct contact with core decision-makers in a thriving European scaleup

