1KOMMA5°, a CleanTech unicorn with over 3,000 employees at more than 80 locations, is hiring a Software Engineer – Edge in Germany. You will build core parts of its Heartbeat AI Enterprise energy management system, from Go and Lua code on IoT gateways to cloud microservices, working from new offices in Hamburg, Berlin or Munich, or remotely.
About 1KOMMA5°
Mission: Electrify everything and connect households to the future power market
Platform: Heartbeat AI, a virtual power plant linked to the electricity market in real time
Goal: Move 1.5 million households to renewable energy by 2030
Reach: 3,000+ people at 80+ locations, from Finland to Australia
Benefits & Career Opportunity
Work Model: New offices in Hamburg, Berlin and Munich, and/or remote
Culture: Flat hierarchies, early responsibility and direct work with management
Fitness: EGYM Wellpass with 7,600+ sports partners
Extras: Jobrad leasing, Futurebens discounts and private use of your tech equipment
Position Overview
As Software Engineer – Edge, you develop core components of the Heartbeat AI Enterprise energy management system, both locally on IoT gateways and in a cloud-native backend. You write high-performance Go for edge controllers and lightweight Lua scripts and protocol drivers for inverters, battery storage (BESS) and HVAC systems. You also build Go microservices that process time-series data and telemetry and manage fleets across hundreds of customer sites, and you connect local assets to the virtual power plant so they can respond to spot market prices.
Why This Role Matters: Solar, storage, heat pumps and EV charging are being steered as one system, and the software at the edge is what makes that work. This role puts you at the point where code meets real hardware, in a fast-growing company building what it calls Europe’s largest decentralised virtual power plant.
Key Responsibilities
Edge & Gateway Development
- Build core components of Heartbeat AI Enterprise, on IoT gateways and in the cloud
- Write high-performance Go for edge controllers, including system services and communication layers
- Create Lua control scripts and protocol drivers for inverters, BESS and HVAC systems
Cloud & Protocols
- Design and program scalable Go microservices for time-series data, telemetry and fleet management across hundreds of sites
- Implement MQTT, REST/gRPC and Modbus TCP/RTU communication
Integration & Teamwork
- Enable data flow between local assets (meter values, flexibility) and the virtual power plant for control by spot market prices
- Work in a cross-functional team with system architects, PLC developers and product management to ship features for commercial energy management
Qualifications
Education
- Degree in computer science, software engineering or a comparable qualification, or solid professional software development experience
Experience & Skills
- Very good Go skills, ideally in cloud and microservice settings, plus hands-on Lua experience, e.g. for embedded or edge use
- Solid knowledge of cloud platforms (AWS, GCP or Azure), Docker, Kubernetes and CI/CD
- Experience with IoT or edge computing, preferably on Linux systems such as Raspberry Pi or industrial PCs
- Confident with MQTT and REST, ideally some contact with Modbus
Personal & Language
- Structured, solution-oriented way of working and motivation to help build Europe’s largest decentralised virtual power plant
- Fluent German and English, written and spoken
About 1KOMMA5°
The 1KOMMA5° Group calls itself a CleanTech unicorn. Its mission is to electrify everything and connect everyone to the future power market through its AI-based software platform Heartbeat AI. It is a market leader in installing CO2-neutral energy systems, especially photovoltaics, storage, wallboxes, heat pumps and energy management, and it keeps growing worldwide.
How to Apply: Apply through the 1KOMMA5° careers page. The posting lists no email or phone number, and gives no salary figure.
Who Should Apply?
- Go Developers: Wanting to work close to hardware
- Embedded and Lua Engineers: Moving into energy software
- IoT Engineers: With Modbus or MQTT experience
- Cloud and Kubernetes Engineers: Interested in edge systems
- Energy Tech Talent: Seeking remote work in Germany
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