Jobs in Mannheim, Germany
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Litify
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[Hiring] Strong Middle/Senior DevOps Engineer @Sigma Software
Sigma Software
Senior Data Scientist
Job summary
A leading energy and tech consultancy is seeking a freelance data scientist to tackle optimisation and forecasting projects. The role involves building mathematical models and engineering data pipelines. Ideal candidates will have a strong energy sector background, expert Python skills, and a proven track record in consulting. This position allows for remote work within Germany, with a competitive hourly rate between €100 and €125.
Qualifications
- Strong background in the energy sector, trading, or data science.
- Proven freelance or consulting experience with energy or trading clients.
- Ability to challenge assumptions and translate technical insights into business value.
Responsibilities
- Build and improve mathematical optimisation models for trading strategies.
- Enhance forecasting frameworks for short- and mid-term horizons.
- Engineer robust data pipelines and APIs.
- Transition legacy code into modern Python solutions.
- Deliver clear, business-focused insights and documentation.
Skills
Tools
- Start : Immediate / flexible within the next weeks
- Duration : 6 months+ (extension very likely)
- Location : Remote within Germany
- Rate : €100–125 per hour
About the Project
We’re working with a leading energy & tech client on high-impact optimisation and forecasting projects. This is a chance to join a highly skilled team tackling complex challenges around renewable integration, asset optimisation, and large-scale data systems.
We’re looking for a freelance data scientist / mathematical optimisation specialist who can work independently and deliver production-ready solutions. You’ll be embedded in a project team with direct impact on trading, investment, and operational strategies.
- Build and improve mathematical optimisation models (portfolio, storage, trading strategies)
- Enhance forecasting frameworks for short- and mid-term horizons
- Engineer data pipelines and APIs, ensuring robustness and reproducibility
- Transition legacy code into scalable, modern Python solutions
- Work across the full stack : databases, cloud platforms, CI / CD, containerisation
- Deliver clear, business-focused insights and documentation
What We’re Looking For
- Strong background in energy sector / trading / data science
- Expert-level Python skills (NumPy, pandas, Pyomo, scikit-learn, FastAPI, etc.)
- Proven freelance / consulting experience with energy, trading, or logistics clients
- Familiarity with Azure / AWS, SQL / GraphQL, Docker, CI / CD
- Able to challenge assumptions and translate technical insights into business value
- Business-fluent English (German a plus, but not required)
* The salary benchmark is based on the target salaries of market leaders in their relevant sectors. It is intended to serve as a guide to help Premium Members assess open positions and to help in salary negotiations. The salary benchmark is not provided directly by the company, which could be significantly higher or lower.
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