100% Fossil-free: We don't just dream of a sustainable and livable world - we shape it together and with passion! For over 20 years, we have been a driving force in the expansion of renewable energies. We generate, store and deliver green energy around the globe - with wind, solar, biogas and hydrogen. Around 1,000 employees at various locations worldwide share our mission: to generate renewable energy sustainably for a livable earth.    
  
Become a part of the ENERTRAG team at our location in Berlin as System Optimization Engineer (m/f/d) and let's advance the energy transition together.  

• You work with the System Planning team to perform techno-economic optimisation of Power-to-X projects, guided by specific project assumptions from the project developers. 

• You develop and maintain software tools that support the optimisation efforts of ENERTRAG's System Planning team, ensuring they are effective and up to date. 

• You ensure code versioning, collaboration, and management using Git, following best practices for branching, merging, and pull requests. 

• You adhere to clean coding principles and participate in code reviews to maintain high software quality and consistency. 

• You identify performance bottlenecks and optimize code to improve efficiency and scalability. 

• You help to develop and extend new optimisation models, implementing them in a suitable programming language (e.g., Python). 

• You prepare and present results in a clear and comprehensible manner, using visualisation techniques to enhance understanding. 

• You write reports for internal reviews and decision-making, and conduct site inspections as needed. 

• You have completed a degree in engineering, physics, mathematics, or a related field, with a specialization in applied mathematics (optimisation, operations research) or energy being a strong advantage. 

• You have at least 4 years of hands-on experience in software development, with advanced proficiency in Python and Git. 

• You have an understanding of energy economics and expertise in numerical optimisation (linear/non-linear programming). 

• You have relevant professional experience in energy system modelling (capacity expansion and production-cost modelling), or have gained experience in energy system modelling and energy economics during post-graduate studies. 

• You demonstrate a structured approach to work, strong teamwork abilities, and a high level of determination. 

• Experience with open energy modelling tools for electricity generation and transmission expansion planning, such as PyPSA, Balmorel, or Calliope, is a plus. 

• You are fluent in English and German a plus.

#kids: Your children are the most important thing to you? For us, too. That's why you receive a daycare allowance from us.  
  
#jobrad: Would you like to have some innovative wind around your ears? Then use our job bike - also privately.   
  
#vacation: You need new energy and are already in a mood for departure? We offer 30 days of vacation.  
  
#retirementprovision: We are not only thinking about tomorrow for the sake of the environment, but also for you. That's why we offer you access to the Allianz private pension plan. You will also receive an allowance from ENERTRAG SE in the amount of the social security contributions saved.   
  
#mobilework: You want to stay flexible? Depending on the job, we decide together whether you prefer to come to the office or work from home.   
  
#worklifebalance: You know best at what time of the day the drive is strongest for you. Therefore, you also decide at which working hours you want to use your power around the core working hours.  
  
#training: Do you want new impulses to expand your potential? With us you have the opportunity for individual development with a generous training budget.  
  
#health: Your well-being is close to our hearts. So that you don't lose your vitality, we offer you company health management and accident insurance.   
  
#language: Do you speak English? No? Then simply learn it together with us.   
  
#drinksforfree: Water, coffee and tea - if you like, you can also have a juice or fresh fruit.  
  
#teamevents: To let work be work, we invite you once a year to our big summer party and to other team events in between. 
  
#fossilfree: This should not remain just a dream! Take advantage of the great creative leeway to shape a sustainable and livable world.  
  

Do you have any questions in advance? Then please get in touch with your contact person Karo. You can reach her at: [email protected]
   
* What counts for us are your skills and your motivation to advance renewable energies with us - not age, gender, skin color, handicap, origin, sexual orientation or religion.