Senior Energy Systems Engineer - BESS Optimization & Production (Berlin)
We're FIDgate — a Berlin-based climate-tech startup building a decision platform for renewable energy infrastructure.
Our platform combines techno-economic optimization, energy systems modelling, financial analysis, and AI-assisted workflows for solar PV, wind, and battery energy storage projects.
We're backed by a major German EXIST startup program and currently transitioning from pilot execution to scalable productization.
We're looking for a Senior Energy Systems Engineer who sits at the intersection of two worlds that rarely overlap cleanly:
Deep energy domain knowledge — you understand how BESS projects make money. Dispatch optimization, multi-market participation (capacity, energy, ancillary services), degradation modelling, PPA vs merchant vs tolling structures, and what drives IRR in a real infrastructure investment decision.
Production software engineering — You’re comfortable moving from mathematical models and research prototypes into robust production systems.”
This is the role for someone who has spent years at an energy software company, a BESS developer, a trading desk, or an optimization tool provider — and wants to build something from scratch with real ownership.
- Design and implement optimization models for BESS, solar PV, wind, and hybrid projects
- Build and maintain the Core v2 optimization engine — the technical heart of the platform
- Work directly with our Scientific Lead to translate mathematical models into production-grade Python
- Define the API contract between the optimization engine and the external-facing SDK
- Design multi-scenario pipelines — capacity optimization, dispatch simulation, financial analysis
- Contribute to the AI-assisted modelling layer — using LLMs to make complex optimization outputs interpretable and actionable for non-technical stakeholders
- Participate in technical conversations with clients and investors — you will be client-facing
Energy domain: BESS dispatch optimization · Multi-market participation (DA, ID, FCR, aFRR, mFRR) · Degradation modelling · Revenue stacking · PPA / merchant / tolling structures · IRR / NPV / LCOE / DSCR · Capacity market mechanics · Solar PV yield modelling · Hybrid asset optimization
Technical: Python (production, not just notebooks) · Optimization frameworks (Pyomo, Gurobi, OR-Tools, CPLEX, or equivalent) · MILP / stochastic optimization · Scientific computing (numpy, scipy, pandas) · Clean architecture principles · API design · Testing for numerical systems
- Work purely in Excel or research notebooks and have never shipped production code
- Have strong optimization theory but no energy domain experience
- Are not comfortable being client-facing and communicating complex technical concepts in English
- Prefer a large structured environment over early-stage ambiguity and ownership
Energy optimization is genuinely hard. Multi-market BESS dispatch with degradation, financial structuring constraints, and investor-grade output reporting is not a solved problem — especially at the intersection of real assets and programmable APIs.
We're building the platform that lets energy developers, investors, and infrastructure stakeholders run these decisions programmatically — replacing Excel models and static assumptions with real-time, scenario-aware optimization.
If you've worked on this problem from the inside at a BESS developer, a trading platform, or an optimization software company, you already know why this matters.
- ?? Strategic headquarters in Berlin
- ? Technical and scientific team in Argentina
- ? International team across energy, engineering, AI, and infrastructure
- ? Connected to TU Berlin, AHK-Argentina, and the German renewable energy ecosystem
- Berlin-based required — EXIST program requires physical presence in Berlin
- EXIST eligibility — candidates must have obtained their most recent degree (BSc or MSc) within the last 5 years
- Full-time dedication required
- Excellent English required — client-facing role
- Start ASAP
- Compensation aligned with EXIST program structure + meaningful long-term equity upside
- High technical influence on platform architecture and modelling direction
- Introductory conversation — background, motivation, fit
- Technical deep-dive — energy domain and optimization approach
- Practical modelling exercise — a real problem from our domain
- Final conversation with the full team
If this resonates — especially if you've worked on BESS optimization, multi-market dispatch, or energy investment modelling — reach out directly or send a short intro and CV to contact@fidgate.com
We're particularly interested in hearing from people who have worked at energy software companies, BESS developers, trading desks, or optimization tool providers and want to build something from scratch.