Senior Full Stack Developer (f/​m/​d)

immediately

Full-time, Unlimited

Düsseldorf

Senior Full Stack Developer (f/m/d)

Location: Düsseldorf, North Rhine-Westphalia, Germany
Our COO IT DevOps Team is looking for you!

Your responsibilities

As a Senior Full Stack Developer in the COO IT Devops team, you will be responsible for ensuring the overall end to end software quality and guiding the cross-team architecture. Acting as the “glue” between frontend, backend and quality assurance communities, you will drive best practices, facilitate collaboration, and ensure seamless integration of software components. This role demands leadership across the entire Software Development Life Cycle (SDLC), including ownership of code review (Pull Request) processes, application performance, and team Key Performance Indicators (KPIs).

Architectural Leadership

  • Define and manage cross-team software architecture, ensuring scalable and maintainable solutions.
  • Collaborate with Frontend, Backend, Quality Assurance and other teams within CO IT to integrate systems efficiently and consistently.
  • Champion high-level design decisions, ensuring alignment with Uniper’s strategic goals.

Full SDLC Ownership

  • Take responsibility for the entire development lifecycle, from requirements gathering and design to deployment and maintenance.
  • Oversee Pull Request processes, code reviews, and merges to maintain code quality and consistency.
  • Implement and refine tracking, tracing, and monitoring strategies to ensure robust production systems.

Quality & Performance

  • Drive best practices in coding, testing, and deployment to deliver high-quality applications on time.
  • Own performance metrics and KPIs, working with teams to continuously optimize codebase and processes.
  • Encourage a culture of continuous improvement, knowledge sharing, and learning within the development community.
  • Own Captain’s View and drive adoption within COOIT teams and beyond.

Collaboration & Stakeholder Management

  • Serve as the primary link between Frontend, Backend and Quality Assurance teams, fostering open communication and teamwork.
  • Provide technical guidance and mentorship to junior developers, ensuring adherence to coding standards and practices.
  • Work closely with Product Owners, Project Managers, and other stakeholders to define requirements and set realistic timelines.

Innovation & Continuous Improvement

  • Stay current with emerging technologies and development best practices, assessing their fit for use cases.
  • Advocate for new tools, technologies, and processes to maintain a cutting-edge development environment.
  • Support the evolution of the COODE platform to scale for future projects and business needs.

Your profile

Education & Experience

  • Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.
  • 5+ years of professional experience as a Full Stack Developer, with a track record of delivering complex applications.

Technical Proficiency

  • Expertise in both front-end (e.g., React, Vue) and back-end (e.g., Node.js, Python (FastAPI), .NET) frameworks.
  • Solid understanding of RESTful APIs, microservices, and modern software architecture principles.
  • Hands-on experience with CI/CD pipelines, DevOps practices, and cloud platforms (Azure).
  • Familiarity with databases (SQL & NoSQL) and caching mechanisms for high-performance applications. Focus on MSSQL and Cosmos DB.
  • Experience with monitoring and tracing on the Azure platform.

Leadership & Communication

  • Proven ability to lead cross-functional teams and drive consensus on technical decisions.
  • Excellent communication and presentation skills for both technical and non-technical audiences.
  • Strong interpersonal skills to mentor team members and collaborate with stakeholders.

Analytical & Problem-Solving

  • Demonstrated success in troubleshooting, optimizing, and scaling web applications.
  • Ability to translate business requirements into robust technical solutions.
  • A passion for continuous learning, keeping up with industry trends and best practices.

Job ID:

88043

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

Please note: Unfortunately, we cannot consider applications by e-mail for data protection reasons. We would therefore like to ask you to apply exclusively here via our career page. The process is very simple and only takes a few minutes.

As long as our positions are online here on the career page, the application process is not yet complete and the positions are still vacant.

We look forward to receiving your application!

Your Uniper Talent Acquisition Team

Top Employer Germany 2025

Living diversity, fairness and inclusion (DEI) at Uniper

As an employer, Uniper is committed to diversity and equal opportunities. That's why we encourage applications from suitably qualified and suitable people regardless of gender, origin, disability, age, religion, ideology, sexual identity or marital status. We embrace inclusion and support flexible working.

What makes Uniper stand out as an employer

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

    Further education

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

    Coachings and Mentoring

  • 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.

    Open feedback culture

  • 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.

    Health care

  • 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.

    Sport and Fitness

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

    Healthy nutrition

  • 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.

    Insurance and coverage

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

    Financial benefits

  • 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.

    Work Life Balance

  • We provide you with free parking spaces.

    Free parking spaces

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

    Car and job bike leasing

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.asd

  • 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.

  • 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.

  • 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.

  • We are Uniper

    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.

    360_tour.webp

    Düsseldorf

    Virtual tour of our offices in Düsseldorf

    With our virtual reality tour, you can experience Uniper from a completely new perspective. Our Düsseldorf offices can be viewed in detail without being on site. You can also get to know your colleagues and the working environment virtually. A highlight of the tour is built right into the beginning: a video from a bird's eye view impressively shows how attractive our location in the Medienhafen is.

    Take the 360 degree tour
    Düsseldorf_Standort_1.webp

    Düsseldorf

    Uniper has been based at our headquarters in Düsseldorf's Media Harbour since 2019. Our central office consists of the two buildings Caprocorn and Float, which are connected by a walkway to form a single unit.

    Düsseldorf_Standort_2.webp

    Düsseldorf

    Uniper has been based at our headquarters in Düsseldorf's Media Harbour since 2019. Our central office consists of the two buildings Caprocorn and Float, which are connected by a walkway to form a single unit.

    Düsseldorf_Standort_3.webp

    Düsseldorf

    Uniper has been based at our headquarters in Düsseldorf's Media Harbour since 2019. Our central office consists of the two buildings Caprocorn and Float, which are connected by a walkway to form a single unit.

    Düsseldorf_Büro_1.webp

    Düsseldorf

    On the office floors, the modern furnished meeting areas and lounges are located in the centre of each floor and our colleagues work separately from the passage areas, each with window fronts. All workstations have modern equipment and height-adjustable desks.

    Düsseldorf_Büro_2.webp

    Düsseldorf

    On the office floors, the modern furnished meeting areas and lounges are located in the centre of each floor and our colleagues work separately from the passage areas, each with window fronts. All workstations have modern equipment and height-adjustable desks.

    Düsseldorf_Büro_3.webp

    Düsseldorf

    On the office floors, the modern furnished meeting areas and lounges are located in the centre of each floor and our colleagues work separately from the passage areas, each with window fronts. All workstations have modern equipment and height-adjustable desks.

    Düsseldorf_Café_1.webp

    Düsseldorf

    We offer many services at the location that positively support everyday working life. These include an IT walk-in centre, a fitness studio, an underground car park with free parking spaces for cars and an extra garage for bicycles, including showers. For a balanced diet, there is a canteen as well as a café and a deli with fruit and healthy snacks, which are also open to the public.

    Düsseldorf_Café_2.webp

    Düsseldorf

    We offer many services at the location that positively support everyday working life. These include an IT walk-in centre, a fitness studio, an underground car park with free parking spaces for cars and an extra garage for bicycles, including showers. For a balanced diet, there is a canteen as well as a café and a deli with fruit and healthy snacks, which are also open to the public.

    Düsseldorf_Café_3.webp

    Düsseldorf

    We offer many services at the location that positively support everyday working life. These include an IT walk-in centre, a fitness studio, an underground car park with free parking spaces for cars and an extra garage for bicycles, including showers. For a balanced diet, there is a canteen as well as a café and a deli with fruit and healthy snacks, which are also open to the public.

    FlexWork

    Flexible working at Uniper means that our teams decide for themselves how, when and where they work. We have created hubs for collaboration and networking in our offices and we provide our employees with the equipment for a modern and healthy workplace at home. We also offer geographical flexibility and various flexible working models. This means you can do your work from different locations and shape your job to fit your personal lifestyle, so you can balance your work and private life perfectly.

    To give you a deeper insight into the flexible working experience at Uniper, we have created a dedicated page where you can learn more about our flexible working models.

    More about FlexWork at Uniper

    Application process

    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.

    Your application

    Your general questions