An employee stands wearing a helmet and protective clothing in one of Uniper's power plants in Sweden.

Senior BESS Engineer (f/​m/​d)

Calendarimmediately

ClockHybrid, Full-time, Unlimited

GlobeBerlin, Düsseldorf

Senior BESS Engineer (f/m/d)

Locations: Berlin (Berlin), Düsseldorf (NRW)

Our Solar & BESS Engineering Team in Renewables is looking for you!

We are Uniper

At Uniper, we are pro-actively transforming the world of energy whilst at the same time ensuring security of energy supply. As an internationally operating company, we work in very diverse teams with the greatest possible working time flexibility for our employees. Our corporate culture is characterized by equal opportunities, mutual appreciation, and respect. With us, you will be able to develop new business models, work on technological solutions for a modern, sustainable, and future-oriented energy supply as well as pro-actively help to shape changes. Interested? Then we will look forward to meeting you!

Your responsibilities

  • Design and develop battery energy storage systems (BESS) integrated with solar and wind power projects
  • Conduct feasibility studies and site assessments for BESS installations
  • Collaborate with cross-functional teams to ensure seamless integration of BESS with solar PV and Wind systems
  • Structure and improve tendering strategy and ensure successful project execution along time, budget, quality and HSE
  • Develop and review technical specifications, drawings, and documentation for BESS projects
  • Ensure compliance with industry standards, regulations, and safety protocols
  • Provide technical support during the commissioning and testing of BESS
  • Stay updated with the latest advancements in BESS technology and solar engineering
  • Mentor and guide other engineers, sharing knowledge and best practices
  • Lead engineering activities during development TDD and construction stage

Your profile

  • University degree in the area of electrical engineering, renewable energies or similar with focus on electrical engineering
  • At least 5 years of relevant work experience
  • Proficiency in BESS technologies, including lithium-ion batteries, battery management systems, and power conversion systems
  • Experience with energy management software, simulation tools, and modeling platforms
  • Familiarity with solar and/or wind design, grid integration, power electronics, and control systems for renewable energy projects
  • Knowledge of RES technology, including system design, installation, commissioning and maintenance
  • Creative and open-minded individual with a good sense of humor
  • Excellent communication and stakeholder management skills
  • Proven track record of international work experience
  • Willingness to travel internationally
  • Business fluency in English, any other language will be helpful

Your benefits

At Uniper, we not only reward our employees with attractive salaries, an excellent company pension and health related benefits for their hard work and dedication to shaping the future energy transition. You can also expect a supportive working culture that offers a wide range of creative and innovative ideas. We enable various flexible working arrangements, whilst also supporting with home office equipment.

Through regular training and workshops, together we work towards visualising yourself in our company as if it were your own. We support you in highlighting your individual potential, achieving your personal goals, and reaching your ambitions. We invite you to become part of our diverse company with international colleagues from more than 80 countries. As an employer, Uniper has committed itself to providing special support to certain areas:

Work-Life-Balance / New Normal:

  • Choosing how, where, and when to work in accordance with your team and the requirements of your job
  • Modern and ergonomic equipment for your workplace (home & office)
  • Support to balance private life and work: Sabbaticals, part-time possibilities, family service

Mobility:

  • Bike leasing offer (deferred compensation)
  • E-car charging stations at almost all Uniper locations

Health offers:

  • Flu vaccination
  • Preventive health services
  • Employee assistance program

Company pension:

  • Employer-funded contributions to a modern pension system
  • Possibility of self-funded contributions with employer-funded matching

Trainings:

  • Lifelong training
  • Coaching

Our employees are the reason for our success. Therefore, you will find many other benefits at the local level to help you reach your potential. Energy evolutionary wanted!

Your contact

If you have any questions, please do not hesitate to contact us at:

career@uniper.energy

Attention! Please apply via the button in this portal. Application documents that reach us by post will not be returned and, like those we receive by e-mail, can unfortunately not be considered!

Job information

Contract type:

Working Hours: [[filter6]]

Job ID:

89247

Location:

Berlin, Düsseldorf

Type of contract:

Unlimited

Working model:

Hybrid, Full-time, Unlimited

Start date:

immediately

Do you have any questions?

If you have any questions, please feel free to contact us by e-mail and we will get back to you:

career@uniper.energy

Top Employer Germany 2026

What makes Uniper stand out as an employer

  • Training

    Further education

    With a mix of digital and analog learning formats and topic-specific communities, we promote your personal and profossional development and lifelong learning.

  • Award

    Coachings and Mentoring

    Experienced specialists and managers are happy to support you in strengthening your skills and advancing your career development.

  • Bubble

    Open feedback culture

    Performance discussions, 360-degree feedback and employee surveys will help you and the company move forward, strengthen our collaboration and give you room to contribute your ideas.

  • Health

    Health care

    Safety and well-being are our top priorities. That's why we offer you regular free preventive medical checkups as well as a variety of learning impulses on occupational safety, health and well-being, and support programs.

  • Ball

    Sport and Fitness

    With our online exercise courses, sponsorship of your participation costs in central sports events and a large sports community, we offer you a healthy working environment.

  • Canteen

    Healthy nutrition

    You can enjoy a wide range of healthy and balanced meals in our canteen. In addition, you can participate in nutrition programs.

  • Fonds

    Insurance and coverage

    We take care of you and offer you a wide range of coverage beyond the legal requirements with our company pension plan, accident insurance, company health insurance and continued salary payments in the event of illness.

  • Money

    Financial benefits

    We pay capital-forming benefits and offer you a wide range of financial benefits through our corporate benefits program

  • Smiley

    Work Life Balance

    We support you in balancing your private and professional life through flexible working time models, job sharing, sabbaticals and extensive offers in the area of child care and nursing.

  • Car

    Free parking spaces

    We provide you with free parking spaces.

  • Bicycle

    Job bike leasing

    We offer you the option of leasing a bicycle through deferred compensation with financial benefits.

The benefits may vary slightly depending on location and role. You can find a complete overview of the benefits here:Benefits

Get to know your future colleagues

Valentina

EVP Operational Excellence

At Uniper “treating everyone in a fair way”, and “making everyone feel included” are serious topics. This is why we regularly seek feedback from our employees, we listen to them, and we make changes so that we can get closer and closer to our vision of DEI.

Valentina - EVP Operational Excellence

Thomas

Head of ETRM department

I was excited to join Uniper as it a give me the opportunity to be part of a large, complex and dynamic Trading Organization. The company trades a lot of different commodities in many markets with all their uniqueness, which ultimately requires many different IT tools and solutions. I enjoy working with traders and all the supporting functions in such a challenging environment.

Thomas - Head of ETRM department

Navya

Lead Business Analyst

My passion is driven by the excitement of learning something new every day and a strong sense of pride supporting our Uniper business growth & Strategy. This is enhanced by the presence of a great team around me, whom I can always rely on for support.

Navya - Lead Business Analyst

Mithun

Lead - Strategic Endur Solutions

Each day excites me with new challenges by driving various Strategic IT initiatives for our CCO Trading Business and accelerating the energy transition by decarbonising our portfolio. My motto: Entrepreneurship is trait that you live each moment! At Uniper, I can constantly challenge status quo and shape the environment around me.

Mithun - Lead - Strategic Endur Solutions
About Uniper
Diversity
Job Sharing

Transforming energy security through expertise and commitment

Uniper is a European energy company with a global reach that makes a decisive contribution to security of supply and energy transformation.  We work in very diverse teams and offer our employees as much flexibility as is possible.

Equity, mutual appreciation and respect are the core of our corporate culture. At our company you will have the opportunity to shape new technologies, work on solutions for a modern and future-oriented energy supply and actively design change processes.

Application process

Step 1 - Online application

Step 1

Online application

Have you found a suitable job posting? Then you can apply online right here. The application process is very simple and only takes a few minutes. Once we have received your application successfully, you will receive confirmation by e-mail immediately afterwards.

Your questions. Our answers.

Do you have any questions?

Do you have any questions?

Our recruiting team will be happy to assist you via email. Please submit your application exclusively through our online portal – unfortunately, we cannot consider applications sent by email. As long as the position is listed on our careers page, we look forward to your interest and application!

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