• Design, craft, deploy, monitor and maintain our optimization platform end-to-end, across dimensions such as data ingestion and processing, optimization logic implementation, battery control, automated power trading, accounting and settlement
• Work cross-functionally, especially with data scientists to support them in the implementation of our optimization logic, automated trading execution, and battery control
• Closely collaborate with fellow software engineers, explain the various trade-offs made in decisions and participate in code reviews to ensure code quality and to distribute knowledge 
• Proactively participate in resolving ongoing incidents  
• Maintain and improve our tech stack and development environments and build infrastructure, from how services are developed and tested, to how they are built and integrated, to how they are monitored

• 1+ years experience in Software Engineering (Backend and algorithmic) in the cloud
• 2+ years experience with Python including object-oriented design
• Track record in owning, designing, delivering, and operating software systems from concept through deployment and maintenance

• Collaborative team contributor who communicates clearly, supports peers through feedback and knowledge sharing, and actively explores modern engineering practices to improve outcomes

• Demonstrated ability to translate business and product requirements into effective technical solutions and align with stakeholders on implementation decisions

• Desire to work in a dynamic, fast-paced environment

• Full business proficiency C1 level in English

• Familiarity with the AWS cloud platform, and services like Lambda, ECS, DynamoDB
• Proficiency with observability toolchains such as Grafana (LGTM stack) and/or Datadog
• Experience in the energy industry, especially energy management or power trading

• You don’t proactively define your own tasks or milestones, and instead tend to rely on other functions to initiate or break down the work needed for delivery
• You prefer working in clearly separated functions and hierarchies

• Competitive Compensation Package: Including salary, benefits and options
• Professional Development: Annual development budget of 3,000 € for coachings, trainings, books, etc.
• Health & Sport Subsidy: Company subsidised sports facilities membership or
  Public Transportation Subsidy: Monthly subsidy to your public transport ticket
• Lunch/Dinner Allowance Vouchers: Allowance for meals on working days as digital meal vouchers
• Work Equipment: Mac Book and ergonomic workplace
• Regular Team Events: Knowledge Sessions, Afterwork, Sports, Offsites, Halloween, Pride Month, etc.

Sebastian Troitzsch
Software Engineering Manager - Flexa

Hi there!

I’m Sebastian Troitzsch, Software Engineering Manager at Flexa, where we focus on building software systems that enable large-scale virtual power plants and intelligent energy management. My expertise sits at the intersection of energy systems, optimization, and scalable cloud software, with a focus on turning complex energy models into reliable production systems that operate in real-world energy markets.

Before joining Flexa, I worked at gridX as Software Team Lead, where I led a team responsible for the dynamic tariff optimization feature of gridX’s energy management system, helping scale the platform from prototype to production systems serving tens of thousands of households.

Earlier in my career, I worked in energy system modeling and optimization research in Singapore, developing simulation platforms and optimization models for topics such as demand response, smart charging and vehicle-to-grid integration.

At Flexa, we believe innovation happens when talented people collaborate across disciplines. We aim to create an environment where engineers can take ownership, experiment with new ideas, and build technology that has real impact on the future of energy.

If you’re eager to be part of a dynamic and international team as well as excited about building technology that accelerates the transition to a smarter and more flexible energy system, I encourage you to explore opportunities with us.

Thank you for considering a future with us. Looking forward to what we can build together.

Sebastian