Senior Software Engineer (Backend) (mwd) Virtual Power Plant (VPP)

We are a green-tech company shaping the energy industry towards a more sustainable future. At Lumenaza you have the opportunity to actively contribute to the world of decentralized and renewable energy. Our mission is to drive the energy transition forward with passion and innovation.

Lumenaza stands for clear values: sustainability diversity and collaboration. We take pride in our diverse team and are committed to supporting women in tech.

You will receive thorough onboarding into the energy market processes and gain access to an exciting future-proof industry. We know how complex the energy market can be which is why we actively share our expertise to ensure you can succeed regardless of your previous experience in the sector.

We invite you to join our growing development team as a Senior Software Engineer (Backend) in Berlin (m/f/d).

Your tasks

As a Senior Software Engineer (Backend) you and your team will further develop our Virtual Power Plant (VPP) which controls hundreds of decentralized energy assets and aggregates them for trading on the electricity market. This includes implementing new process views and developing microservices.

• Contribute to the energy transition:
  Youll design and implement scalable software solutions enabling demand-based control comprehensive monitoring and profitable flexibility mechanisms for generation assets and battery storage systems making a direct impact on the success of the energy transition.

• Shape complex systems:
  From concept and implementation to quality assurance youre involved in every step. Youll work on the development of microservices handling large volumes of measurement forecasting and balancing data and use observability measures to enhance transparency stability and scalability.

• Solve technical challenges:
  The energy market is complex and dynamic. Youll develop robust and scalable solutions in Python and Django tackling challenges such as asynchronous processing domain modeling and distributed systems all while addressing demanding design and performance questions.

• Collaborate across teams:
  Youll work closely with colleagues in backend frontend and DevOps as well as Product Owners. Together youll design innovative cloud solutions share knowledge and actively shape architecture decisions. Youll collaborate within an agile Scrum environment participating in sprint planning reviews and retrospectives to continuously improve both product and process.

• Stay curious and share knowledge:
  You keep up with current trends in software design bring new ideas to the team and contribute to the continuous evolution of our platform.

• Bridge legacy and future:
  Youll help maintain existing systems while supporting their migration into modern microservice architectures ensuring the sustainable development of our overall system landscape.

Do you want to help shape the energy industry of tomorrow We value enthusiasm for sustainability over perfection diversity and a willingness to learn are what count. Apply and help us shape the future.

• Degree in Computer Science or a comparable qualification

• At least 5 years of experience as a backend software engineer ideally in complex distributed system landscapes

• Excellent knowledge of Python SQL and Django

• Solid experience with Django REST Framework and designing/integrating REST APIs

• Experience with microservice architectures and distributed systems

• Confident handling of Docker and Docker Compose

• Practical experience with pytest or similar testing frameworks

• Understanding of modernizing legacy systems

• Passion for Clean Code automation and CI/CD

• Strong communication skills in English

• Experience with PostgreSQL Git and Linux systems

• Knowledge of Pandas for data-driven applications

• Experience with TimescaleDB Elasticsearch Redis and object storage (e.g. S3)

• Hands-on experience with Temporal or similar workflow engines (e.g. Airflow)

• Experience with Celery and asynchronous programming

• Practice in implementing and maintaining ETL pipelines

• Knowledge of Pydantic

• Experience using Robot Framework for test automation

• Experience with Smart Metering data (high-frequency time series processing)

• Basic understanding of the German energy market and its regulatory framework

• Knowledge of TypeScript and React

• German language skills are a plus

At Lumenaza youll find not only unique benefits but also a culture of support and continuous development:

• Comprehensive onboarding and training:
  New team members are supported through tailored training programs to expand their skills and expertise.

• Flexibility for a better work-life balance:
  Enjoy flexible working hours and the option to work from home part of the week helping you balance work and personal life effectively.

• Attractive additional benefits:
  In addition to fair pay we offer perks such as a discounted electricity tariff and a reduced-price Deutschlandticket.

• Modern work environment:
  Our office in Berlin-Kreuzberg provides an inspiring workspace that fosters creativity and productivity.

• Innovation at the heart of the energy transition:
  Join our team at the forefront of energy innovation and help revolutionize the industry.