(Senior) IoT Platform Engineer

About 1KOMMA5°

We are building Germany’s largest one-stop shop for solar, heat pumps, electricity, charging infrastructure, and integrated energy services—and connecting them all. Join our mission to enable a fully renewable energy ecosystem.

We are growing our tech team in Berlin, Munich, and Hamburg and are looking for passionate people ready to make an impact. Become part of our mission and learn more about our Product & Tech team!

Your Mission

At 1KOMMA5°, we connect and manage distributed energy devices at scale. As an IoT Platform Engineer, you will play a critical role in developing and operating the 1K5 Heartbeat Gateway—our edge device that securely bridges thousands of energy assets with our cloud ecosystem.

You will work at the intersection of embedded systems, connectivity, and hardware design, ensuring the gateway remains robust, secure, scalable, and future-proof. Your work directly impacts the reliability and resilience of tomorrow’s distributed energy network.

Key Responsibilities

• Build and maintain the foundational software stack for our IoT gateway using Yocto-based Linux builds.
• Develop and optimize Go-based services for MQTT message brokering and integration with Eclipse Hono for telemetry and command flows.
• Implement logging and metrics pipelines for observability and large-scale troubleshooting.
• Implement and maintain secure OTA update pipelines (Mender), including rollback and version management.
• Design and maintain secure boot mechanisms and hardware safeguards to ensure trusted firmware execution.
• Collaborate with hardware engineers on board design, validation, and certification.
• Ensure compliance with security and connectivity certifications for large-scale IoT deployments.

Technologies You’ll Work With

• Go, Eclipse Hono, Mender, MQTT brokers, Secure Boot, Yocto
• Observability tools: log collectors, metrics exporters, remote debugging tools
• DevOps: CI/CD pipelines, secure OTA processes

Your Profile

• Bachelor’s or Master’s degree in Computer Science, Electrical/Electronics Engineering, or related field.
• 5+ years of experience in IoT platform engineering.
• Proficiency in Go.
• Hands-on experience with OTA firmware deployment (Mender or similar).
• Experience with low-level Linux kernel or driver customization.
• Strong understanding of MQTT, messaging backbones, and device-to-cloud data flows.
• Exposure to hardware design, validation, and certification workflows.
• Familiarity with DevOps (CI/CD, containerization, automation).
• Strong collaboration abilities across hardware, embedded, and cloud teams.
• Excellent troubleshooting and analytical skills.
• Clear communicator in English (German is a plus).

Bonus Points

• Experience with Eclipse Hono.
• Familiarity with Google Cloud Platform.
• Open-source contributions (MQTT, Yocto, OTA frameworks).
• Practical experience implementing secure boot.
• Passion for climate tech and distributed energy systems.

Benefits

• Join a dynamic team driving real-world impact in the energy transition.
• Work in flat hierarchies with short decision-making processes.
• Friendly, supportive, and collaborative team culture.
• Experience tangible purpose in your day-to-day work.
• Work from our offices in Hamburg, Berlin, or Munich.
• Enjoy a healthy work-life balance with EGYM Wellpass access.
• Benefit from Futurebens discounts and perks.
• Stay flexible and eco-friendly with our job bike leasing program.