We are looking for a senior developer who will take ownership of designing and buildinghigh-quality, well-tested software solutions within the Transport Execution Managementdomain. You will work closely with the solution designer and business stakeholders totranslate ideas into effective, reliable applications, gaining a deep understanding of thebusiness context along the way. Beyond strong technical expertise, we are looking for someone who shows initiative,communicates clearly, contributes actively to the team, and is willing to go the extra milewhen needed. You are respectful and calm in your interactions. Independence is key in this role: taking full responsibility for delivering complete solutions is part of your daily work.At the same time, you value teamwork and knowledge sharing. You bring professionalismand a constructive attitude that helps the team move forward. Mandatory conformity criteria.NET development: Over 10 years of experienceAzure Cloud development: Over 5 years of experience.NET Core Web API development: Over 5 years of experienceNative .NET for Android (Xamarin): Over 5 years of experienceBlazor - At least 1 year of experienceReact Native - At least 1 year of experienceProfessional expertise in unit testingFluent in English (C2)20 days on site at the office in Brussels, to be determined by the customer Evaluation criteria.NET development - demonstrates deep mastery of the .NET ecosystem: language features, LINQ, async/await, security practices, and selecting appropriate data structures and patternsAndroid - Working experience developing complex native .NET for Android / Xamarin applications. Deep mastery of the Android lifecycle, native bindingCode quality & craftsmanship - writes clean, maintainable, and SOLID code that follows best practicesWeb API design & development - designs secure, performant .NET Core Web APIsAzure cloud - leverages Azure services, PaaS components, and event-driven patterns effectivelyUnit testing & test quality - creates meaningful, maintainable, and automated unit testsCI/CD & DevOps practices - sets up robust Azure DevOps pipelines and manages containerized deployments with Kubernetes & DockerSQL & database design - models, queries, and optimizes relational databasesGIT & Version Control - applies branching strategies and collaborates efficiently using GITCollaboration & communication - explains technical choices clearly, works constructively in a team, and remains professional under pressure