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At 1KOMMA5°, we pursue a clear vision: Living on wind and sunlight forever for free. To make this a reality, we are building the energy system of the future with Heartbeat AI. We bring together regional craftsmanship and scalable software: We don't think of solar, batteries, heat pumps, and e-mobility as isolated components, but control them as an intelligent, integrated overall system in our virtual power plant. Directly connected to the electricity market – in real time, fully automated. This way, energy is used when it is available from renewables and particularly cost-effective. By 2030, our goal is to transition 1.5 million households to renewable energies.
Job Responsibility:
Help transform the business of servicing renewable technologies at scale
Take technical ownership of key systems and features
Drive architectural decisions and ensure scalability, reliability, and performance
Collaborate closely with other engineers, product managers, and stakeholders
Mentor teammates
Champion engineering excellence
Help evolve development and deployment practices
Design, build, and maintain business-critical systems across the stack
Design and implement the central architecture for the new Customer Support Platform
Orchestrate and visualise service processes within our virtual assembly line
Take ownership of this project from day one
Make 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
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
Operate effectively in an asynchronous, outcome-oriented environment
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
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
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
Nice to have:
German is a plus
What we offer:
Part of an international, dynamic, and highly motivated team
Direct impact on our climate
Work with and learn from other super-smart colleagues
Flat hierarchies and direct contact with the managing directors
Short decision-making paths
Best chances of entering full-time in one of Europe’s most thriving scaleups
Work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich