




Summary: Join a cross-functional agile team to design, develop, and enhance digital solutions for gas flow management supporting commercial operations. Highlights: 1. Contribute to a platform designed to endure and evolve with the sector 2. Shape architecture, influence standards, and see your decisions through 3. Experiment, refine, and grow alongside a team committed to excellence Overview: Fluxys is an international energy infrastructure group with 1,300 employees active in gas transmission \& storage and liquefied natural gas terminalling. As a purpose\-led company, we’re committed to fast\-track the shift to a carbon neutral world. We explore new technologies and invest in infrastructure to accommodate hydrogen, biomethane, CO2 and other molecules for a climate neutral future. At **Fluxys Byte it**, our mission is to provide digital services to the Fluxys Group companies. For our office located in **Lisbon** we’re looking for a **Developer – Gas Flow Management** (m/f/x). **Job purpose** As a Developer for a Gas Flow Management (GFM) product, you will be part of a crossfunctional, agile team responsible for the design, development, and continuous enhancement of digital solutions supporting Fluxys' commercial operations. **Your responsibilities** * Design and develop high\-quality, maintainable software components within the Fluxys product ecosystem * Collaborate closely with product owners, business analysts, and business stakeholders to translate real\-world challenges into digital solutions * Contribute to architectural discussions and propose improvements that enhance performance, reliability, and maintainability * Implement and maintain tests and participate in testing activities * Review code, mentor peers, and uphold coding standards within the teams * Contribute to release preparation, including technical documentation and deployment activities * Support user acceptance testing (UAT), actively participate in demo sessions, and ensure clear, reliable documentation to help users adopt the product * Handle functional and technical service requests from business stakeholders, providing timely and effective support * Collaborate with the product team to investigate and resolve incidents, ensuring minimal impact on operations * Participate in monitoring and troubleshoot issues across development, testing, and production environments * Actively engage in Agile ceremonies: backlog refinement, sprint planning, reviews, retrospectives, and daily stand\-ups * Help create technical items on the product backlog, phrase them in a value\-oriented manner understandable by business stakeholders, and support the product owner to prioritize these according to value delivered **About you** * Affinity with the **technical stack** used by the team: + Backend: .NET 8 / .NET Framework, ASP.NET Web API, WCF + Data \& Messaging: SQL Server, Oracle, RabbitMQ, NHibernate, Entity Framework + Architecture \& Patterns: Domain\-Driven Design (DDD), Clean Architecture, Design Patterns + Testing \& CI/CD: xUnit / NUnit, Azure DevOps Pipelines + Frontend: Blazor experience is a plus + DevOps \& Tools: Git, Azure DevOps, automated deployment \& monitoring tools * Strong grasp of **software design principles**, clean **coding practices,** and **architectural** **thinking** * Experience working with **complex systems** and maintaining **large codebases** over time * Familiarity with modern **testing strategies** and **CI/CD processes** * Ability to engage with both **technical** and **business stakeholders** fluently * Fluency in **Portuguese** and in **English**; knowledge of either French or Dutch is a plus The Mindset we value:* **Product\-Focused:** You understand that success means delivering real value to users and the business, not just completing tasks. You stay aligned with product goals and customer outcomes. * **Collaborative by Nature:** You thrive in cross\-functional teams, communicate openly, and believe the best solutions come from shared thinking and mutual respect. * **Curious and Proactive:** You ask questions, explore beyond the obvious, and challenge the status quo to continuously improve how we work and what we deliver. * **Adaptable and Resilient:** You embrace change, stay flexible under shifting priorities, and help others navigate uncertainty with a positive mindset. * **Committed to Quality:** You take pride in delivering thoughtful, reliable work. You aim for sustainable outcomes and long\-term impact, not just quick fixes. * **Transparent and Accountable:** You bring visibility to your progress and blockers, take ownership of your responsibilities, and help foster trust across the team. * **Continuous Learner:** You stay curious about technology, the energy sector, and modern ways of working—and you’re eager to grow alongside the team and the product **Why should you apply?** We offer a **very attractive package** of extra\-legal benefits, including a.o.: individual bonus, smartphone, internet, flexible budget allowance, meal vouchers, 25 holidays, health insurance for the whole family, as well as the possibility of working from home up to 3 days per week. In addition:* **Impact at Scale:** Your code powers energy flows across Europe—today and for tomorrow’s low\-carbon carriers. * **Autonomy \& Ownership**: Shape architecture, influence standards, and see your decisions through to production. * **Long\-Lived Product****:** Contribute to a platform designed to endure and evolve with the sector. * **Learning Culture:** Experiment, refine, and grow alongside a team committed to excellence.


