Solution Designer

As a Lead .NET Developer, you are the technical reference for .NET applications within the OptiGen domain, supporting the Lumi Power team and the broader Optimization & Generation Department. You combine deep technical expertise with a coordinating mindset, ensuring robust, performant and future-proof solutions while aligning internal and external development teams.

What you'll do

• You act as the internal SPOC and technical authority for .NET applications and integrations.
• You actively contribute to the development of complex, high-impact .NET solutions, combining hands-on delivery with architectural oversight.
• You steer and guide nearshore development teams, ensuring alignment with internal standards and expectations.
• You safeguard quality by defining and enforcing coding standards, organizing code reviews and promoting best practices.
• You drive automation and engineering excellence through CI/CD, testing and deployment improvements.
• You continuously identify opportunities to improve processes, collaboration and technical approaches across teams.

Do you have experience in SAFe?, Do you have a Bachelor's degree?, * You have strong experience within the .NET ecosystem (C#, APIs, microservices, integrations).

• You bring solid knowledge of scalable architectures, design patterns and software best practices.
• You are familiar with DevOps principles and CI/CD automation; cloud experience (preferably AWS) is a strong plus.
• You have experience guiding external development teams in a non-hierarchical setup.
• You communicate clearly and confidently, translating technical decisions into actionable guidance.
• You have a hands-on, pragmatic mindset with a strong focus on quality, maintainability and continuous improvement.

Pulled from the full job description

• Company car
• Internet reimbursement
• Food allowance, The energy sector is one of the most rewarding industries in Belgium with a highly rewarding compensation and benefits package:
• Competitive compensation: Attractive salary with a performance-based bonus that can be optimized to your personal preferences, plus meal vouchers.
• Insurance & social benefits: Group insurance and hospitalization coverage for the entire family. Additional reimbursement for healthcare and pharmaceutical costs.
• Mobility: Full reimbursement for public transport, kilometer-based cycling reimbursement and flexible mobility choices: you can choose between a company car or mobility budget.
• Internet & communication: Home internet covered, reimbursement for a personal mobile device with a phone subscription.
• Home Office: A fully-equipped home office, including an ergonomical ICT set-up.
• Exclusive discounts: 30% off gas and electricity after six months, discounts on energy-saving services (e.g., solar panels, heat pumps) and reduced prices on top brands, amusement parks, festivals and more.
• You work on business-critical applications at the heart of energy optimization and generation, connecting Luminus with the grid operator Elia.
• You get real ownership, combining build and run responsibilities in a modern Agile/SAFe environment.
• You join a collaborative IT team where your technical leadership directly shapes future-ready energy solutions.
• You work and connect with your colleagues at a Luminus office or from home. Need some flexibility? Your manager is open to discuss what works.

Luminus values e.v.e.r.y individual. Are you looking for a workplace where you can truly be yourself, where you feel respected, supported regardless of your background, identity and unique story? Then you've come to the right place. Diversity equity and inclusion are not empty words for us - we grant that everyone can flourish and feel valued, so let's build it together! What does that mean in practice? Do you have specific needs or require adjustments during the recruitment process or once you are hired? Let's discuss about it and we'll do our best to find a solution. We can also discuss if you want to work at 80% or 100%. Together we make the difference