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