About the job
We are a fast-growing energy tech start-up building the digital energy analyst of the future.
At Re-Twin Energy, our platform powers investment decisions for battery energy storage systems (BESS) through data-driven simulations and market models.
We don’t sell a “nice-to-have.”
We sell better decisions .
We are looking for an Energy Modeler to work directly with the founders — close to the product, markets, and key decisions.
Tasks
* Develop power market optimization models for BESS and hybrid assets
* Build and improve bidding and dispatch strategies (DA, ID, FCR, aFRR, mFRR)
* Implement models using Python and Pyomo
* Translate market rules into mathematical models
* Work with time-series data (prices, forecasts, generation)
* Improve trading logic and backtesting
* Collaborate with engineering to integrate models into production
* Analyze outputs and communicate key insights
Requirements
* 2–3 years experience in energy modeling or power markets
* Strong Python skills
* Experience with Pyomo or similar optimization tools
* Understanding of European power markets
* Strong analytical and problem-solving skills
* Comfortable with time-series data
* High ownership mindset
* Based in or willing to relocate to Frankfurt, Germany
Bonus Skills
* Experience in power trading
* Knowledge of BESS optimization
* Familiarity with Azure or cloud platforms
* Exposure to forecasting or production systems
Benefits
Real climate impact
Hybrid setup in Frankfurt
Competitive compensation
Work directly with founders
Exposure to real trading strategies
Fast-moving, ownership-driven culture
You will build the core intelligence of our platform — models that drive multi-million-euro decisions.
We look forward to your application!