Principal Software Engineer (m/f/d)

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. Learn about our Product & Tech team!

Your mission 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 Embed security and reliability as direct customer value Architect our systems and APIs so AI agents operate as first-class users with machine-readable contracts and structured errors that let agents self-correct Drive the org's transformation to agentic engine