Staff Software Engineer (d/m/f)

Short Facts

Join us on our journey: We are seeking an energetic Staff Software Engineer (d/f/m) with a deep technical understanding and a strategic vision to guide software development at Flexa. Your strong curiosity to understand the solution space, combined with a pragmatic approach to delivery, will help us achieve our goals. You share our vision and values and are committed to our mission.

• Location: Munich, Germany
• Employment Type: Full-Time, indefinite term
• Salary Range: € 115.000 - 135.000 per year gross, depending on the seniority level
• Working mode: In office
• Language Requirement: C1 Level English

Your Responsibilities

• Drive Strategic Initiatives:

  Oversee critical technical initiatives and develop a technical roadmap from prototyping to production, in close collaboration with senior leadership, to build Europe’s largest Virtual Power Plant. Key areas include data ingestion and processing, energy management systems (EMS), optimization logic, fleet control, accounting, and settlement.

• Research and Innovate:

  Identify emerging technological trends, build proofs of concept, and drive their transition into scalable production systems that create tangible business value.

• Collaborate Cross-Functionally:

  Partner across all teams & disciplines to deeply understand customer and stakeholder needs, stay ahead of industry developments, and ensure we are building the right solutions for today and the future.

• Be Hands-on:

  Guide the team in evolving our cloud-based technology platform. Design and deliver high-quality, scalable software architectures, and contribute across service development, testing, integration, and monitoring.

• Advance System Capabilities:

  Continuously enhance our algorithmic and trading systems for both immediate go-lives and long-term strategic evolution, optimizing for performance, scalability, and maintainability.

• Mentor and Enable:

  Act as a mentor and technical leader, helping team members enhance their workflows and continuously raise their engineering craftsmanship.

• Champion Engineering Excellence:

  Be a role model in software engineering best practices, fostering a culture of maintainable, iterative, and high-quality delivery across engineers and data scientists.

Your Profile

Mandatory requirements

• 6+ years of experience in Software Engineering (Backend and algorithmic) in the cloud

• 2-3 years of experience with Python, including object-oriented design

• 3+ years of experience in onboarding, mentoring and coaching colleagues

• Strong hands-on experience with AWS cloud platform, including core services such as ECS, RDS, Lambda, Amazon Data Firehose, SQS, S3, and networking/IAM fundamentals

• Proactivity in understanding industry trends and business, complementary to technical experience

• Proven track record of pragmatic delivery and strategic project execution

• Experience working cross-functionally, especially with Product and Data Science teams

• Team player with the ability to effectively communicate complex ideas and concepts, as well as work independently on solutions

• Experience and enthusiasm for working in a dynamic, fast-paced environment

• Strategic and analytical thinking

• Full business proficiency in English

Skills to Set You Apart

• 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