Senior Full-Stack Software Engineer

Role Overview

Join 1Komma5° as a Senior Full-Stack Software Engineer. You will architect and build financial engines and payment lifecycles, ensuring a seamless checkout experience that supports the global energy transition.

Key Responsibilities

• Architect and build robust payment lifecycles and checkout experiences to enable sustainable energy adoption.
• Take technical ownership of key systems and features, driving architectural decisions for scalability, reliability, and performance.
• Collaborate closely with engineers, product managers, and stakeholders to shape technical direction and deliver high-impact solutions.
• Contribute to lightweight project management while delivering end-to-end features.
• Own features end-to-end, from UX and architecture through deployment and monitoring.

Requirements

• Strong experience writing maintainable, reusable, and testable code in TypeScript.
• Solid skills across frontend frameworks and backend technologies.
• Product-focused, pragmatic mindset balancing technical excellence with customer value.
• Residency in Germany.
• Excellent written and spoken English.
• Strong understanding of API design, data modeling, and system integration using REST and/or GraphQL.
• Initiative to explore new tools and methods that improve product quality and engineering efficiency.

Nice-to-haves

• No explicit nice-to-haves listed, but curiosity and willingness to adopt new tools are encouraged.