Principal Software Engineer (m/f/d)

1KOMMA5° Bremen; Berlin; Remote; EUR 70.000 - 100.000; Vollzeit

Zusammenfassung

Join a leading renewable energy company as a Principal Software Engineer in Berlin. Drive innovation in building interconnected solutions for solar energy and smart installations while working with a dynamic team of engineers. Influence architectural decisions and collaborate closely with product management to shape the future of energy solutions in Germany.

Leistungen

International team environment

Impact on climate through energy transition

Professional development opportunities

Job bike leasing

Work-life balance benefits

Qualifikationen

• Minimum 5 years of hands-on experience in software development.
• Proven track record in architecting scalable and secure systems.
• Experience in designing APIs for system communication.

Aufgaben

• Lead the technical strategy and ensure execution of technical decisions.
• Shape software architecture to align with product management.
• Mentor engineers and build a high-performance tech organization.

Kenntnisse

Software development

Architecting scalable systems

API design and implementation

Team collaboration

Cross-functional team leadership

Communication skills

Tools

Typescript

JavaScript

NodeJS

Ruby on Rails

Flutter (Dart)

Google Cloud Platform

Terraform

Jobbeschreibung

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 leveraging 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