(Senior) Software Engineer - Device Connectivity (Go) (m/f/d)

1KOMMA5°; Berlin; Vor Ort; EUR 90.000 - 120.000; Vollzeit

Benefits dieser Stelle

International team

Zusammenfassung

1KOMMA5° is building Heartbeat, an energy management platform that integrates solar, storage, charging, and heat pumps into a unified system. As a Senior Software Engineer – Device Connectivity, you will integrate OEM devices and implement protocols in a Berlin-lab environment, working with cross-functional teams to ensure scalable, reliable edge services.

You will develop Go-based modules for IoT gateways, test end-to-end readiness, and provide expert support to stakeholders while advancing the

Qualifikationen

• Bachelor's or Master's degree in Computer Science, Electrical/Electronics Engineering, Control Engineering or related field.
• Experience in IoT development and integration with OEM devices.
• Hands-on experience developing software modules for IoT devices.
• Go programming experience is highly preferred.
• Proficiency with Modbus TCP, OCPP, and MQTT.
• Strong knowledge of TCP/IP and LAN/WLAN; device discovery in home networks.

Aufgaben

• Own the technical integration of inverters, batteries, charging infrastructure, and heat pumps into the Heartbeat energy management system.
• Ensure seamless communication and interoperability between different OEM devices.
• Implement communication protocols such as Modbus TCP, OCPP, MQTT, EEbus.
• Develop, deploy, and maintain services on our IoT gateway using Go programming.
• Diagnose network issues across LAN/WAN, VPN, firewalls, and protocols; build resilient edge services.
• Conduct testing of our energy management system in our lab in Berlin.
• Collaborate with cross-functional teams to meet performance and reliability standards.
• Provide expert-level support to internal and external stakeholders.

Kenntnisse

IoT development

Device integration

Go programming

Modbus TCP

OCPP

MQTT

CI/CD

TCP/IP

LAN/WLAN

Ausbildung

CS or Electrical Eng degree

Tools

CI/CD pipelines

Jobbeschreibung

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.

Your mission

At 1KOMMA5°, we connect and manage tens of thousands of distributed energy devices at scale. As a (Senior) Software Engineer – Device Connectivity, 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 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.

• Own the technical integration of inverters, batteries, charging infrastructure, and heat pumps into our Heartbeat energy management system, driving projects end-to-end to deliver solutions on time.
• Ensure seamless communication and interoperability between different OEM devices.
• Implement communication protocols such as Modbus TCP, OCPP, MQTT, EEbus.
• Develop, deploy, and maintain services on our IoT gateway using Go programming.
• Diagnose network issues across LAN/WAN, VPN, firewalls, and protocols, and turn that understanding into resilient edge services.
• 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.
• Foster a culture of experiment-driven innovation within the team

Your profile

• Bachelor's or Master's degree in Computer Science, Electrical/Electronics Engineering, Control Engineering or related field.
• Proven experience in IoT development and integration, with a focus on integrating diverse OEM devices.
• Hands-on experience in the development of software modules for IoT devices.
• Experience with Go programming is highly preferred.
• Proficiency in communication protocols such as Modbus TCP, OCPP, and MQTT.
• Solid understanding of local area networks (TCP/IP, LAN/WLAN) and experience with device discovery and scanning mechanisms within home networks.
• Familiarity with DevOps practices and tools, including continuous integration and deployment (CI/CD) pipelines.
• Prior exposure to energy management systems is desirable.
• Outstanding, proactive communication skills: you excel at engaging stakeholders and initiating cross-team collaboration
• 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 network or systems administration (routing, firewalls, DNS, DHCP) in a production environment.
• Familiarity with cloud platforms (ideally Google cloud) and their integration in IoT solutions.
• Previous experience in providing support to international stakeholders.
• Certifications related to IoT and energy management

Benefits

• You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen
• You move in flat hierarchies and have short decision-making paths. You can learn a lot quickly and get involved at different levels
• You will be welcomed by a friendly and familiar team
• You are part of the energy transition and recognize in your daily work what purpose it serves
• You can work in one of our offices in Hamburg, Berlin or Munich
• You 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

About Us

“At 1KOMMA5°, our vision is to accelerate CO2 neutral life for all! We created an easy one-stop-shop to buy and install solar, charging stations and heat pumps, with the purpose of liberating all European homes from the shackles of fossil fuels. With Heartbeat, we make clean energy smarter. Connecting our customers into one powerful clean energy operating system to enable flexible tariffs and to ultimately follow the rhythm of wind and sun!” – Philipp Schröder (CEO 1KOMMA5°)