Senior Full-Stack Software Engineer

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

What the job involves

• As a Senior Software Engineer at 1KOMMA5°, you will take technical ownership of key systems and features, driving architectural decisions and ensuring scalability, reliability, and performance
• You’ll collaborate closely with other engineers, product managers, and stakeholders to shape our technical direction and deliver high-impact solutions
• Beyond writing great code, you’ll mentor teammates, champion engineering excellence, and help evolve our development and deployment practices to the next level
• 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