(Senior) IoT Cloud Engineer

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., * 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

Technologies you will work with include:

• Cloud & Infra: Google Cloud Platform, GKE (Kubernetes), Cloud Run, Terraform/IaC
• Messaging & IoT: Eclipse Hono, MQTT, Mender
• Data & BI: PostgreSQL, BigQuery, SQLMesh, Looker
• Observability: Datadog, OpenTelemetry
• Languages: TypeScript (Nest.js), Java, Go
• DevOps: CI/CD pipelines (GitHub Actions)

Dein Profil

• 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
• Experience with SQLMesh and/or Looker (LookML) specifically
• Familiarity with Google Cloud Platform as the primary cloud
• Experience running load tests for messaging infrastructure or large-scale distributed systems.
• Passion for climate tech and distributed energy systems

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.

• 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

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.