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1KOMMA5˚

<div><h4 class="jobSectionHeader">1KOMMA5&deg;</h4>
At 1KOMMA5&deg;, 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. Want to be part of it? 
 
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 &ndash; 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. Over 3,000 people are working towards this every day, at more than 80 locations worldwide, from Finland to Australia. 
 
Want to take responsibility and build solutions that truly matter? Apply now and help us shape the energy world of tomorrow. 
 
Learn more about our Product &amp; Tech team!<h4 class="jobSectionHeader"> 
Your mission</h4>
As an Engineering Manager at 1KOMMA5&deg; Heartbeat AI GmbH, you will lead one of our cross-functional App teams, empowering your engineers to own the full lifecycle of their products from development and deployment to day-to-day operations. 
 
Our Stack: 
<ul><li>
TypeScript, NestJS, Next.js, Flutter</li><li>
AI-assisted development with Cursor and agentic coding workflows</li><li>
SQLMesh, BigQuery, Looker</li><li>
GCP, Vercel, GitHub Actions, Datadog</li><li>
Linear, Notion, Figma, Miro</li></ul>
Key responsibilities include but are not limited to: 
<ul><li>
Provide technical leadership, guidance, and expertise across the team and be part of the hiring process to find the best talents</li><li>
Be an excellent people manager and support your team members in their professional and personal development</li><li>
Help your team members to create, implement, evaluate, deploy, sustain, and enhance software solutions for complex and undefined problems</li><li>
Foster a culture of experiment-driven innovation within the team</li><li>
Promote teamwork and successful project execution</li><li>
Improve developer satisfaction by constantly avoiding/reducing tech-debt, automating as much as possible and documenting decisions, runbooks etc.</li></ul><h4 class="jobSectionHeader">
Your profile</h4>
You have: 
<ul><li>
Bachelor's or Master's degree in Computer Science, Engineering or related field</li><li>
At least 5 years of proven experience in software engineering in a fast paced and scalable environment</li><li>
At least 3 years of experience in leading cross-functional and agile software engineering teams working with cutting edge technologies on distributed systems</li><li>
Systematic problem-solving approach, coupled with effective communication skills in English, German is a plus</li></ul>
Bonus points for: 
<ul><li>
Experience in climate tech and especially energy industry</li><li>
Experience in a startup or scale-up environment</li></ul>
We are an ambitious and dynamic company with a talented team. We require our engineers to be imaginative, enthusiastic, and willing to tackle new challenges as we strive to provide everyone with renewable energy technologies.<h4 class="jobSectionHeader">
Benefits</h4><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 &quot;energy transition&quot; 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&rsquo;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><h4 class="jobSectionHeader">
About us</h4><div>
&quot;At 1KOMMA5&deg;, our vision is to accelerate CO2 neutral life for all! We created an easy one-stop-shop to buy and install solar, charging stations and heat pumps, with the purpose of liberating all European homes from the shackles of fossil fuels. With Heartbeat, we make clean energy smarter. Connecting our customers into one powerful clean energy operating system to enable flexible tariffs and to ultimately follow the rhythm of wind and sun!&quot; - Philipp Schr&ouml;der (CEO 1KOMMA5&deg;)</div></div>

Engineering Manager Heartbeat AI (m/f/d)

<div><h4 class="jobSectionHeader">1KOMMA5&deg;</h4>
At 1KOMMA5&deg;, 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. Want to be part of it?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 &ndash; 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. Over 3,000 people are working towards this every day, at more than 80 locations worldwide, from Finland to Australia. 
 
Want to take responsibility and build solutions that truly matter? Apply now and help us shape the energy world of tomorrow. 
 
Learn more about our Product &amp; Tech team!<h4 class="jobSectionHeader"> 
Deine Position</h4>
You architect the billing, invoicing, and monetization systems behind the global energy transition, one unified internal platform. By designing and running everything from invoicing and subscriptions to PSP-backed payments and reconciliation, you make sustainable energy financially solid and operationally scalable. The audit trails, templates, and integrations you build are what finance teams and customers trust as we grow across markets. 
 
As a Software Engineer at 1KOMMA5&deg;, you will take technical ownership of key systems and features, driving architectural decisions and ensuring scalability, reliability, and performance. You&rsquo;ll collaborate closely with other engineers, product managers, and stakeholders to shape our technical direction and deliver high-impact solutions. Beyond building solution, you&rsquo;ll mentor teammates, champion engineering excellence, and help evolve our development and deployment practices to the next level. 
 
Key responsibilities include but are not limited to: 
<ul><li>
Contribute as a 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 and APIs to performant, user-friendly frontends with reliable flows for invoices, payments, and subscriptions where they touch customers and finance</li><li>
Partner with finance, operations, and product to translate complex, loosely defined billing requirements into clear, actionable technical solutions, including compliance-minded documents and audit-friendly reporting where needed</li><li>
Own slices of the invoice lifecycle (generation, delivery, and archival), templating and localization, and reconciliation and reporting together with stakeholders</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>
Our Stack: 
<ul><li>
TypeScript / JavaScript</li><li>
Next.js for frontend applications</li><li>
NestJS and Hono for backend applications and APIs</li><li>
Postgres, Auth0, OpenAPI</li><li>
Infrastructure as code</li><li>
Deployment to Google Cloud/Vercel</li><li>
Observability with Datadog</li></ul><h4 class="jobSectionHeader">
Dein Profil</h4><ul><li>
Experience writing maintainable, reusable, and testable code in TypeScript, with strong skills in both frontend frameworks and backend technologies</li><li>
Strong understanding of API design, data modeling, and system integration (RESTful or GraphQL), including patterns for idempotent money movement and auditable billing events where relevant</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 for regulated or finance-adjacent flows</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><h4 class="jobSectionHeader">
Benefits</h4><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 &quot;energy transition&quot; 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 entering full-time in one of Europe&rsquo;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><h4 class="jobSectionHeader">
&Uuml;ber uns</h4><div>
Die 1KOMMA5&deg; Gruppe ist ein CleanTech Unicorn mit der Mission alles zu elektrifizieren und &uuml;ber unsere KI-basierte Software Plattform Heartbeat AI jeden an den Strommarkt der Zukunft anzuschlie&szlig;en. Wir sind das marktf&uuml;hrende Unternehmen f&uuml;r die Installation von CO2-neutralen Energiesystemen, insbesondere bei Photovoltaik, Energiespeicher, Wallbox, W&auml;rmepumpe und Energiemanagement. 1KOMMA5&deg; vereint die besten Unternehmen Deutschlands, Europas und dar&uuml;ber hinaus &ndash; wir wachsen weiter und das weltweit.</div></div>

Software Engineer - Financial Infrastructure & Payments (m/f/d)

Join 1KOMMA5˚ and explore 2   exciting career opportunities. They're hiring for various roles with options for remote or on-site work. Apply today and become part of their innovative team.

1KOMMA5˚

About Company

Engineering Manager Heartbeat AI (m/f/d)

Software Engineer - Financial Infrastructure & Payments (m/f/d)