Senior Software Engineer - Energy Markets (m/f/d)

Permanent employee, Full-time · Berlin, Remote, Hamburg, München

1KOMMA5°

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. 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 – 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.

Become a part of our mission and learn more about our Product & Tech team!

Your mission

We are looking for a Senior Software Engineer - Energy Markets to drive the technical direction of our Energy Markets workstream, with the potential to grow into a lead role.

Key responsibilities include:

Build and optimize backend services for VPP operations and energy market integrations
Design systems at the intersection of backend and data processing pipelines
Drive technical decisions and guide fellow engineers on architectural choices
Navigate between data engineering, backend engineering, and energy market domains
Collaborate with product managers, data engineers, and data scientists across team boundaries

Your profile

The successful candidate will have:

Proven experience developing scalable backend solutions with TypeScript
Data engineering fundamentals — designing systems bridging backend and data processing
Hands-on experience with energy service interfaces (smart meters, optimization, load balancing)
Strong knowledge of architectural patterns, CI/CD (GitHub Actions), and cloud infrastructure (GCP preferred)
Ability to guide architectural decisions, mentor engineers, and coordinate across domains
Passion for maintainable, documented, and testable code

Bonus points for:

Experience building virtual power plant infrastructure and energy market integrations
Python and BigQuery experience in Data Engineering or Machine Learning contexts
IoT experience for grid balancing and demand response
Infrastructure as Code experience (Terraform)
Familiarity with energy market APIs (EPEX Spot, Montel)

Benefits

You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen
With your work, you accelerate the "energy transition" and hence have a direct impact on our climate
Work with and learn from other super-smart colleagues
You will enjoy direct contact with core decision-makers
You will enjoy the best chances of entering full-time in one of Europe's most thriving scaleups
You work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich
Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass
Benefits and discounts are yours with Futurebens
Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time

Apply for this job

About us

"At 1KOMMA5°, 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!" - Philipp Schröder (CEO 1KOMMA5°)

1KOMMA5°

Deine Position

Build and optimize backend services for VPP operations and energy market integrations
Design systems at the intersection of backend and data processing pipelines
Drive technical decisions and guide fellow engineers on architectural choices
Navigate between data engineering, backend engineering, and energy market domains
Collaborate with product managers, data engineers, and data scientists across team boundaries

Dein Profil

The successful candidate will have:

Proven experience developing scalable backend solutions with TypeScript
Data engineering fundamentals — designing systems bridging backend and data processing
Hands-on experience with energy service interfaces (smart meters, optimization, load balancing)
Strong knowledge of architectural patterns, CI/CD (GitHub Actions), and cloud infrastructure (GCP preferred)
Ability to guide architectural decisions, mentor engineers, and coordinate across domains
Passion for maintainable, documented, and testable code

Bonus points for:

Experience building virtual power plant infrastructure and energy market integrations
Python and BigQuery experience in Data Engineering or Machine Learning contexts
IoT experience for grid balancing and demand response
Infrastructure as Code experience (Terraform)
Familiarity with energy market APIs (EPEX Spot, Montel)

Benefits

You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen
With your work, you accelerate the "energy transition" and hence have a direct impact on our climate
Work with and learn from other super-smart colleagues
You will enjoy direct contact with core decision-makers
You will enjoy the best chances of entering full-time in one of Europe's most thriving scaleups
You work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich
Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass
Benefits and discounts are yours with Futurebens
Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time

Apply for this job

Über uns

Die 1KOMMA5° Gruppe ist ein CleanTech Unicorn mit der Mission alles zu elektrifizieren und über unsere KI-basierte Software Plattform Heartbeat AI jeden an den Strommarkt der Zukunft anzuschließen. Wir sind das marktführende Unternehmen für die Installation von CO2-neutralen Energiesystemen, insbesondere bei Photovoltaik, Energiespeicher, Wallbox, Wärmepumpe und Energiemanagement. 1KOMMA5° vereint die besten Unternehmen Deutschlands, Europas und darüber hinaus – wir wachsen weiter und das weltweit.

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