Senior Full-Stack Software Engineer – m/f/d

November 5

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1KOMMA5°

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Energy • SaaS • Hardware

1KOMMA5° is a company dedicated to providing sustainable energy solutions through the installation and management of solar panels, heat pumps, energy storage systems, and energy management technologies. Their Heartbeat AI and Dynamic Pulse technologies intelligently connect and optimize users' energy systems, allowing for significant savings in energy costs. The company emphasizes independence from traditional energy markets by enabling households to produce and manage their own clean energy. With a focus on sustainability, 1KOMMA5° also facilitates the sale of surplus solar energy, helping users earn additional income. They operate comprehensively, offering consultation, planning, installation, and service through their extensive network across multiple countries.

1001 - 5000 employees

Founded 2021

⚡ Energy

☁️ SaaS

🔧 Hardware

📋 Description

• Collaborate as a Senior Full-Stack Engineer within a team of autonomous software developers. • Design, build, and maintain business-critical systems across the entire stack. • Work on scalable backend services and performant, user-friendly frontends. • Translate complex, loosely defined business problems into clear, actionable technical solutions. • Promote clean architecture, component reusability, and maintainable UI patterns using modern frameworks (e.g., React, Next.js or similar). • Drive experiment-led innovation and uphold strong engineering practices in testing, CI/CD, observability, and code quality. • Continuously improve the developer experience by reducing technical debt, automating workflows, and documenting key decisions and operational procedures. • Work 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 efforts 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 take features end-to-end, from UX and architecture to implementation and monitoring. • A pragmatic, product-oriented 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.

🏖️ Benefits

• Be part of an international, dynamic, and highly motivated team of people who have a track record of delivering results. • With your work you accelerate the energy transition and have a direct impact on the climate. • Work with and learn from other highly intelligent colleagues. • You will have direct contact with key decision-makers. • Enjoy the best opportunities to secure a permanent position at one of Europe's fastest-growing scale-ups. • Work remotely (throughout Germany), with offices in Hamburg, Berlin or Munich. • Create a healthy work-life balance and enjoy all the benefits of EGYM Wellpass. • Access benefits and discounts via Futurebens. • Whether a city bike or an e-bike — stay flexible with our company bike leasing and do something good for the environment.