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Senior IoT Backend Developer (m/f/d) Berlin, Munich or Hamburg



Software Engineering
Posted on Tuesday, July 2, 2024


We are looking for you as an addition to our tech-team in Berlin, Munich or Hamburg. 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 a Senior IoT Backend Developer in 1KOMMA5°, you'll lead the development of a scalable microservices architecture on Google Cloud, connecting and controlling IoT devices as part of our Heartbeat platform.Your role involves designing robust backend services, implementing APIs, and creating consistent abstraction layers to facilitate seamless integration across diverse system components. Collaborating with cross-functional teams, you'll contribute to the entire product lifecycle.

Key responsibilities include but are not limited to:

  • Design and implement a scalable microservices architecture on Google Cloud Platform to handle the integration and control of thousands of IoT devices
  • Lead the development of robust and efficient backend services, ensuring high performance, reliability, and security.
  • Continuously optimize the performance of the platform to handle large-scale deployments.
  • Design and implement APIs and abstraction layers for seamless communication between different components of our Heartbeat platform.
  • Work closely with frontend and data engineers, product managers, and other stakeholders to understand requirements and deliver end-to-end solutions.

Technologies you will work with include:

  • Go, Python, and TypeScript
  • Google Cloud Platform (Cloud Run, Cloud Functions, CloudSQL, Firestore, BigQuery …)
  • IoT applications
  • Microservice architectures
  • Terraform
  • GitHub Actions

Dein Profil

You have:

  • Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.
  • Minimum of 5+ of experience in backend development, with a focus on scalable microservice architectures.
  • Proven experience with cloud infrastructure (ideally Google Cloud)
  • Proficiency in programming languages such as Go, Python, and TypeScript
  • Experience in designing and implementing APIs for complex systems.
  • Familiarity with DevOps practices and tools, including continuous integration and deployment (CI/CD) pipelines.
  • Familiarity with IoT protocols, data visualization libraries, and database management
  • 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 with IaC (ideally Terraform)
  • Experience building containerised applications deployed on Kubernetes or Google Cloud Run
  • Experience with building applications following rules and principles
  • Interest in climate tech industry
  • Experience with Data Engineering: Machine Learning, data pipelines

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