Senior Software Engineer

About the role

You will help transform the business of servicing renewable technologies at scale. 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.

What you'll do

• Contribute as a senior software 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
• Design and implement the central architecture for the new Customer Support Platform. Orchestrating and visualising service processes within our virtual assembly line
• Take ownership of this project from day one, making key decisions on API design, database structure, authentication and system scalability
• Design and implement AI first workflows for customer related service cases
• Translate complex and loosely defined business problems into clear, actionable technical solutions
• Champion clean architecture, component reusability, and maintainable UI patterns using modern frameworks
• Drive experiment-driven innovation and uphold strong engineering practices in testing, CI/CD, observability, and code quality

What you'll need

• 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 modelling, and system integration (RESTful or GraphQL)
• AI first mindset
• Experience in configuring and integrating SaaS Tools (such as Zendesk, Zoho CRM)
• 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
• Excellent written and spoken English; German is a plus
• Residency in Germany

What they offer

• Work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich
• Direct impact on climate through accelerating the energy transition
• Work with and learn from other super-smart colleagues
• Flat hierarchies with direct contact to managing directors
• EGYM Wellpass for healthy work-life balance
• Job bike leasing for city bike or e-bike