1KOMMA5° We are looking for you to join our tech team in Berlin, Munich, or Hamburg. 1KOMMA5° is creating Germany's largest one-stop-shop for the sale, installation, and servicing of solar panels, heat pumps, electricity solutions, and charging infrastructure. And the best part? They are all interconnected! Become a part of our mission and learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team! Your mission You will help transform the business of selling renewable technologies at scale. With our core marketing automation and CRM platforms. We redefine growth processes to accelerate the global energy transition empowering private homes and small businesses to adopt sustainable energy solutions. 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. Our Stack: <ul><li>Next.js/TypeScript for frontend applications &amp; NestJS/TypeScript for backend applications</li><li>Infrastructure as code, deployment to Google Cloud, observability with Datadog</li></ul> Your profile Key responsibilities include but are not limited to: <ul><li>Contribute as a senior full-stack engineer within a team of self-driven software developers</li><li>Design, build, and maintain business-critical systems across the stack. From scalable backend services to performant, user-friendly frontends</li><li>Translate complex and loosely defined business problems into clear, actionable technical solutions</li><li>Champion clean architecture, component reusability, and maintainable UI patterns using modern frameworks (e.g. React, Next.js, or similar)</li><li>Drive experiment-driven innovation and uphold strong engineering practices in testing, CI/CD, observability, and code quality</li><li>Continuously improve developer experience by reducing technical debt, automating workflows, and documenting key decisions and operational processes</li><li>Operate effectively in an asynchronous, outcome-oriented environment, managing your work autonomously and maintaining clear communication through documentation and structured updates</li><li>Contribute to lightweight project management by defining milestones, ensuring technical feasibility, and aligning engineering work with product goals</li></ul>You have: <ul><li>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)</li><li>Strong understanding of API design, data modeling, and system integration (RESTful or GraphQL)</li><li>Proven ability to own features end-to-end, from UX and architecture to deployment and monitoring</li><li>A pragmatic, product-focused mindset that balances technical excellence with delivering customer value</li><li>Curiosity and initiative to explore new tools and methods that improve product quality and engineering efficiency</li><li>Excellent written and spoken English; German is a plus</li><li>Residency in Germany</li></ul> Benefits <ul><li>You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen</li><li>With your work, you accelerate the "energy transition" and hence have a direct impact on our climate</li><li>Work with and learn from other super-smart colleagues</li><li>You will enjoy direct contact with core decision-makers</li><li>You will enjoy the best chances of entering full-time in one of Europe’s most thriving scaleups</li><li>You work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich</li><li>Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass</li><li>Benefits and discounts are yours with Futurebens</li><li>Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time</li></ul>

1KOMMA5&deg; was founded in summer 2021 by entrepreneurs and industry experts with the aim of making buildings holistically CO2 neutral through the use of photovoltaics, heat pumps and charging infrastructure. This is implemented by providing technology for decentralized, clean energy, mobility and heat supply. Thanks to the intelligent energy management &ldquo;Heartbeat&rdquo; and the dynamic electricity tariff &ldquo;Dynamic Pulse&rdquo;, 1KOMMA5&deg; always guarantees the cheapest and cleanest electricity from sun and wind. 1KOMMA5&deg; participates in particularly innovative craft businesses in the areas of photovoltaics, electricity storage, charging infrastructure and heat pumps, on the one hand to strengthen regional crafts and on the other hand to enable high-quality advice and installation at the customer's site. 1KOMMA5&deg; currently operates over 65 locations with around 1,500 employees from Europe to Australia. In addition, 1KOMMA5&deg; is working on networking and controlling decentralized generation systems with the aim of fully realizing the potential of the decentralized energy transition. For this purpose, all installed systems become part of a networked IoT platform, which uses algorithms to guarantee optimal, automatic operational management over the life of the system.

Senior Full-Stack Software Engineer (m/f/d)

1KOMMA5° We are looking for you to join our tech team in Berlin, Munich, or Hamburg. 1KOMMA5° is creating Germany's largest one-stop-shop for the sale, installation, and servicing of solar panels, heat pumps, electricity solutions, and charging infrastructure. And the best part? They are all interconnected! Become a part of our mission and learn&nbsp;<a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team! Your mission You will help&nbsp;transform the business of selling renewable technologies at scale. With our core marketing automation and CRM platforms. We redefine growth processes to accelerate the global energy transition empowering private homes and small businesses to adopt sustainable energy solutions. As a Senior Software Engineer at&nbsp;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. Our Stack: <ul><li>Next.js/TypeScript for frontend applications &amp; NestJS/TypeScript for backend applications</li><li>Infrastructure as code, deployment to Google Cloud, observability with Datadog</li></ul> Your profile Key responsibilities include but are not limited to: <ul><li>Contribute as a senior full-stack engineer within a team of self-driven software developers</li><li>Design, build, and maintain business-critical systems across the stack. From scalable backend services to performant, user-friendly frontends</li><li>Translate complex and loosely defined business problems into clear, actionable technical solutions</li><li>Champion clean architecture, component reusability, and maintainable UI patterns using modern frameworks (e.g. React, Next.js, or similar)</li><li>Drive experiment-driven innovation and uphold strong engineering practices in testing, CI/CD, observability, and code quality</li><li>Continuously improve developer experience by reducing technical debt, automating workflows, and documenting key decisions and operational processes</li><li>Operate effectively in an asynchronous, outcome-oriented environment, managing your work autonomously and maintaining clear communication through documentation and structured updates</li><li>Contribute to lightweight project management by defining milestones, ensuring technical feasibility, and aligning engineering work with product goals</li></ul>You have: <ul><li>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)</li><li>Strong understanding of API design, data modeling, and system integration (RESTful or GraphQL)</li><li>Proven ability to own features end-to-end, from UX and architecture to deployment and monitoring</li><li>A pragmatic, product-focused mindset that balances technical excellence with delivering customer value</li><li>Curiosity and initiative to explore new tools and methods that improve product quality and engineering efficiency</li><li>Excellent written and spoken English; German is a plus</li><li>Residency in Germany</li></ul> Benefits <ul><li>You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen</li><li>With your work, you accelerate the "energy transition" and hence have a direct impact on our climate</li><li>Work with and learn from other super-smart colleagues</li><li>You will enjoy direct contact with core decision-makers</li><li>You will enjoy the best chances of entering full-time in one of Europe’s most thriving scaleups</li><li>You work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich</li><li>Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass</li><li>Benefits and discounts are yours with Futurebens</li><li>Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time</li></ul>

Senior Full-Stack Software Engineer (m/f/d)

About the Job

About the Company

1KOMMA5°

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