Offer summary

Qualifications:

Minimum 5 years of hands-on experience in software development across multiple programming languages., Proven track record in designing scalable, secure, and maintainable software architectures., Strong experience in API design and system integration., Excellent communication skills in English, with German proficiency considered a plus..

Key responsibilities:

Lead and shape the company's technical strategy and innovation efforts.

Ensure alignment of software architecture with product management and business goals.

Mentor and develop engineering teams to foster professional growth.

Drive technical decision-making and resolve complex technical challenges.

Job description

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 more about our Product & Tech team!

Your mission

In tech we have two main work streams:

Heartbeat: Building a virtual power plant levering our energy manager “Heartbeat” and evolving the customer experience app around this
Operating System for installation companies: Digitisation of operations and processes from ground operations to rooftop installations

At 1KOMMA5°, we are looking for a top-tier Principal Software Engineer who leads with clarity, decisiveness, and deep technical insight. You will shape and own critical architectural decisions, drive alignment across teams, and ensure execution at the highest technical standard.

Key responsibilities include but are not limited to:

Shape the organisation's technical strategy and innovation efforts
Accountable for consistent execution of technical decisions by setting clear direction and holding teams accountable for implementation
Ensure continuously that our software architecture is shaped in close alignment with product management to support current and future product direction
Lead architectural direction to enable the delivery of scalable, maintainable, and state-of-the-art solutions
Translate business requirements into technical solutions
Tackle and resolve deep technical challenges with urgency and precision
Mentor and challenge engineers to accelerate their professional growth
Build and scale a high-performance tech organisation and engineering culture

Technologies you will work with include:

Typescript/JavaScript/NodeJS (VueJS/NestJS)
Ruby on Rails
Flutter (Dart)
Google Cloud Platform
Terraform
GitHub Actions
IoT applications

Your profile

You have:

Extensive hands-on experience in software development with multiple general-purpose programming languages for a minimum of 5 years
A proven track record of architecting scalable and secure systems, demonstrating a strong commitment to quality
Extensive experience in designing and implementing APIs that enable seamless integration and system communication
An agile and result-oriented mindset, with a strong emphasis on collaboration and teamwork
Expertise in communicating with stakeholders in business terms and understanding the technical implications of their requirements
Industry-leading experience driving cross-functional teams and enforcing engineering alignment in fast-paced environments, including making and following through on critical technical decisions
Excellent verbal and written communication skills in English, with proficiency in German considered a plus

Bonus points for:

Experience with IaC (ideally Terraform)
Interest in climate tech industry

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.

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
Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time
Individualised opportunities for professional development
Reporting directly to the CTO

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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°)

Required profile