Key skills
TypeScriptFrontend frameworksReactNext.jsBackend technologiesNode.jsNestJSAPI designData modelingSystem integrationRESTful APIsGraphQLClean architectureTestingCI/CDCode qualityDeveloper experienceCuriosityWrittenspoken English communicationProject managementRESTfulProject ManagementCommunication
About this role
1KOMMA5° is creating Germany's largest one-stop-shop for the sale, installation, and servicing of renewable energy technologies. As a Senior Software Engineer, you will take technical ownership of key systems and features, driving architectural decisions and ensuring scalability while collaborating with engineers and product managers to deliver impactful solutions.
Responsibilities:
- Contribute as a senior full-stack engineer within a team of self-driven software developers
- Design, build, and maintain business-critical systems across the stack. From scalable backend services to performant, user-friendly frontends
- Translate complex and loosely defined business problems into clear, actionable technical solutions
- Champion clean architecture, component reusability, and maintainable UI patterns using modern frameworks (e.g. React, Next.js, or similar)
- Drive experiment-driven innovation and uphold strong engineering practices in testing, CI/CD, observability, and code quality
- Continuously improve developer experience by reducing technical debt, automating workflows, and documenting key decisions and operational processes
- Operate effectively in an asynchronous, outcome-oriented environment, managing your work autonomously and maintaining clear communication through documentation and structured updates
- Contribute to lightweight project management by defining milestones, ensuring technical feasibility, and aligning engineering work with product goals
Requirements:
- Extensive experience writing maintainable, reusable, and testable code in TypeScript, with strong skills in both frontend frameworks (e.g. React, Next.js) and backend technologies (e.g. Node.js, NestJS, or similar)
- Strong understanding of API design, data modeling, and system integration (RESTful or GraphQL)
- Proven ability to own features end-to-end, from UX and architecture to deployment and monitoring
- A pragmatic, product-focused mindset that balances technical excellence with delivering customer value
- Curiosity and initiative to explore new tools and methods that improve product quality and engineering efficiency
- Excellent written and spoken English; German is a plus
- Residency in Germany