Fluxys is an international energy infrastructure group with 1,300 employees active in gas transmission & storage and liquefied natural gas terminaling. 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 cross‐functional, 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 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. #J-18808-Ljbffr