About this role
Job opportunity: senior .NET full stack expert (minimum 15 years of experience) Location: France (Île-de-France) or Belgium (Brussels) Long-term contract or permanent employment depending on the candidate's profile HappeningIT, a recognized IT consulting and staffing firm, is looking for a Senior .NET Full Stack Expert on behalf of one of its major enterprise clients. The successful candidate will contribute to complex and innovative projects within an international environment. This is a long-term assignment, with the possibility of a permanent position depending on the candidate's profile. Main responsibilities Design, develop, and maintain robust, secure, and high-performance software solutions. Work across both Back-end and Front-end layers according to project requirements. Actively participate in software architecture and technical design activities. Build and maintain CI/CD pipelines using Azure DevOps and automate infrastructure with TerraForm. Contribute to a major digital transformation program for a leading company in the energy sector, involving significant technological, organizational, and business challenges. Optimize data processing using Azure Databricks. Provide technical guidance and support to internal and client teams. Why join this project? Large-scale project with a modern technology stack Experienced and dynamic team Opportunity to work across all layers of a software development project Transparent, people-focused, and high-quality support from HappeningIT Experience:Minimum 15 years of experience in software development. Required technical skills: Back-end / frameworks: .NET Framework .NET Core ASP.NET C# Entity Framework DDD (Domain-Driven Design) TDD (Test-Driven Development) Front-end & applications: Angular Windows Forms Web Applications Xamarin (Mobile) Cloud & DevOps: Azure (Cloud Computing) Azure DevOps Services Azure Databricks TerraForm Tools & environment: Visual Studio Microsoft SQL Server Databases (SQL, PostgreSQL, etc.) Methodologies & soft skills: Structured software development Applied computer science Strong problem-solving skills Excellent communication skills Languages: French: Fluent English: Professional proficiency Dutch: A plus