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!
Deine Position
At 1KOMMA5°, we connect and manage tens of thousands of distributed energy devices at scale. As a (Senior) IoT Cloud Engineer, you will own the cloud side of our IoT Platform that ingests, routes, and observes every message flowing between our gateway fleet and our cloud services.
You will work at the intersection of cloud infrastructure, messaging systems, data and IoT engineering, making sure our device-to-cloud highway is reliable, secure, observable, and cost-efficient as the fleet grows. We are a Platform team: your work directly enables product teams across Heartbeat AI to ship features faster, while giving the business a clear, data-driven view of fleet health and performance.
Key responsibilities include but are not limited to
Take ownership of our systems at the intersection of Cloud Services and residential IoT Gateways
Operate and evolve our Kubernetes-based IoT Cloud Platform, including the deployment, scaling, and hardening of our connectivity and fleet services
Develop and run our Eclipse Hono stack as the messaging backbone between gateways and the cloud
Design, build and operate features around fleet management enabling the lifecycle of gateways from production line to field
Integrate tightly with Mender to operate safe OTA rollouts across the fleet.
Contribute to load and resilience tests to prove the platform scales and to find limits before our customers do
Build and own the observability pipelines for the IoT Platform and turn metrics into automated monitors, alerts, and self-healing mechanisms
Build data pipelines and BI models to turn raw data into fleet insights
Work collaboratively with product managers, data engineers, IoT engineers, as well as cloud engineers to understand problems, support discoveries, and create solutions enabling a scalable virtual power plant
Foster a culture of experiment-driven innovation within the team
Bachelor's or Master's degree in Computer Science, Software Engineering, or related field
5+ years of experience building and operating cloud / distributed backend systems in production
Strong hands-on experience with Kubernetes (ideally GKE) and modern cloud-native operations
Solid understanding of MQTT and device-to-cloud messaging patterns at scale, including back-pressure, QoS, and fan-out
Experience designing and running observability pipelines (logs, metrics, traces) for large-scale distributed systems, and turning them into actionable monitors
Comfortable working with data and BI tooling — writing SQL, modeling data, and building dashboards that drive decisions
Experience with CI/CD, IaC, and platform engineering practices
A strong reliability and security mindset
Ability to guide architectural decisions and navigate across embedded, hardware, data, and product teams
Agile, product-oriented mindset and a strong team player with a bias for action and ownership
Strong troubleshooting and analytical mindset
Clear and effective communicator in English (German is a plus)
Bonus points for
Production experience with Eclipse Hono or a comparable IoT connectivity platform
Familiarity with Mender or other large-scale OTA / fleet management systems