Senior Software Engineer (d/m/f)

Short Facts

• Location: Munich, Germany
• Employment Type: Full-Time, indefinite term
• Salary Range: € 95.000 - 115.000 per year gross, depending on the seniority level
• Working mode: In office
• Language Requirement: C1 Level English

Your Responsibilities

• Design, craft and maintain our VPP system end-to-end, across dimensions such as data ingestion and processing, energy management system (EMS), optimization logic implementation, fleet control, 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
• You will mentor and guide team members and improve their workflows by bringing your best knowledge to the team
• Define and foster engineering best practices and spend time teaching engineers and data scientists on how to design and deliver a well built, maintainable, iterable solution
• You will support your colleagues during their onboarding, daily operations and strategic tasks
• Implementation of our optimization and trading algorithms with focus on immediate go-lives as well as strategic, long-term focussed advancement of our platform
• 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

Your Profile

Mandatory requirements

• 5+ years experience in Software Engineering (Backend and algorithmic) in the cloud
• 2-3 years experience with Python including object-oriented design
• 2+ years experience in onboarding, mentoring and coaching colleagues in junior positions
• Solid hands-on experience deploying and operating production systems on a major cloud platform (AWS, GCP, or Azure)
• Evidence of pragmatic delivery
• Experience working cross-functionally, especially with Product and Data Science teams
• Team player to effectively bring across complex ideas and concepts with an ability to work on solutions individually
• Experience and desire to work in a dynamic, fast-paced environment
• Strategic and analytical thinking
• Full business proficiency in English

Skills to Set You Apart

• Strong experience with AWS cloud platform and familiarity with services like ECS, RDS, Lambda, SQS, S3
• Energy industry experience

This won’t be the right role for you if…

• You don’t have the habit of defining your own tasks and expect other functions to do them
• You are used to working in clear separate functions

At Flexa, we are committed to diversity - of backgrounds and experiences. You don’t need 100% of the preferred qualifications to add incredible value to our team. If you’re passionate about what you could accomplish here, we would love to hear from you.

Your Benefits

• Virtual Share Options: We offer virtual share options to all our employees
• Professional Development: Annual development budget of 3,000 € for coachings, trainings, books, etc
• Health & Sport Subsidy: Company subsidised sports facilities membership
• Public Transportation Subsidy: Monthly subsidy for your public transport ticket
• Lunch/Dinner Allowance Vouchers: Allowance for meals on working days as digital meal vouchers
• Work Equipment: MacBook Pro or Windows Laptop, and ergonomic workplace
• Regular Team Events: Knowledge Sessions, Afterwork, Sports, Offsites, Halloween, Pride Month, etc.

A Short Note from Your Future Lead

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, numerical 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 the multi-energy system modeling and optimization platform that powered public sector studies into electric vehicle infrastructure rollout and integrated thermal/electrical energy system planning on district level.

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