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IoT Integration Engineer (m/w/d) Berlin



Berlin, Germany
Posted on Friday, July 5, 2024


We are looking for you as an addition to our tech-team in Berlin. 1KOMMA5° is building Germany's largest one-stop-shop for sale, installation and services related to solar, heat pumps, electricity and charging infrastructure. And they are all connected! Be a part of our mission!

Deine Position

In tech we have two main work streams:

  • Heartbeat: Building a virtual power plant levering our energy manager “Heartbeat” and evolving the customer experience app around this
  • Operating System for installation companies: Digitisation of operations and processes from ground operations to rooftop installations

As an IoT Integration Engineer, you will play a crucial role in integrating OEM devices, such as PV inverters, batteries, charging infrastructure, and heat pumps, into our cutting-edge heartbeat platform. Your role involves implementing communication protocols, developing embedded software modules on IoT gateway and controller devices, and conducting testing of our energy management system in our lab in Berlin. You will also be providing expert level support for both internal and external stakeholders. Collaborating with cross-functional teams, you'll contribute to the entire product lifecycle.

Key responsibilities include but are not limited to:

  • Integrate PV inverters, batteries, charging infrastructure, and heat pumps into our heartbeat platform.
  • Ensure seamless communication and interoperability between different OEM devices.
  • Implement communication protocols such as Modbus TCP, OCPP, MQTT, EEbus.
  • Develop, deploy, and maintain embedded software modules on IoT gateway and controller devices.
  • Conduct testing of our energy management system in our lab in Berlin.
  • Collaborate with cross-functional teams to ensure software meets performance and reliability standards.
  • Provide expert-level support to both internal and external stakeholders.

Dein Profil

You have:

  • Bachelor's or Master's degree in Computer Science, Electrical/Electronics Engineering or related field.
  • Proven experience in IoT integration, with a focus on integrating diverse OEM devices.
  • Proficiency in communication protocols such as Modbus TCP, OCPP, and MQTT.
  • Hands-on experience in the development of embedded software modules for IoT devices. Experience with Python is preferred.
  • Understanding of energy management systems and related technologies.
  • Familiarity with DevOps practices and tools, including continuous integration and deployment (CI/CD) pipelines.
  • Excellent troubleshooting and problem-solving skills.
  • Experience quickly finding your way around in cross-functional teams in a fast pace, interdisciplinary working environment
  • An agile and result-oriented mindset and you consider yourself a team player
  • Very good knowledge of spoken and written English, German is a plus

Bonus points for:

  • Experience in model-based development with Matlab/Simulink
  • Familiarity with cloud platforms (ideally Good cloud) and their integration in IoT solutions.
  • Experience in implementing APIs for complex systems.
  • Previous experience in providing support to international stakeholders.
  • Certifications related to IoT and energy management
  • Interest in climate tech industry

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 will be part of a young, dynamic and highly motivated team with people who have proven that they can make things happen and move companies forward
  • With your work, you support the megatrend "energy and mobility transition" and make a concrete contribution to the sustainable transformation of our energy infrastructure
  • You are part of a fast growing company with a lot of development potential
  • You move in flat hierarchies and have direct contact with the managing directors as well as short decision-making paths
  • You will be welcomed by a young, close-knit and fast-growing team with an exciting task ahead
  • The results of your work are immediately recognizable and have a direct positive impact
  • You can build something independently and take responsibility
  • You can work remotely (Germany-wide), preferred locations are Hamburg, Berlin or Munich
  • You create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass