About the Mission
Version EN Function As a Senior .NET Developer, you play a key role in the design, development and maintenance of robust software solutions based on Microsoft technologies. You bring your technical expertise to guarantee the quality of the code, the sustainability of the solutions and the performance of the systems. You are also a technical mentor to other team members. Responsibilities: Actively participate in the development of software components in .NET (Framework and Core); Design scalable technical solutions in collaboration with the architecture team; Technically supervise team members and promote a culture of excellence; Carry out code reviews and ensure compliance with good development practices; Analyze functional needs with analysts and translate them into technical solutions; Ensure the quality, performance, security and maintainability of applications;Participate in optimizing system performance;Integrate and evaluate new technologies in line with business objectives. Behavioral skills Ability to critically analyze and integrate information; Structured and solution-oriented thinking; Ability to generate viable alternatives and draw relevant conclusions; Technical leadership and collaborative spirit; Resilience and adaptability in the face of technical or contextual changes Language skills: Proficiency in one of the two national languages: FR or NL (level C2*) · Very good level of English (level C1*)*Levels indicated correspond to the Common European Framework of Reference for Languages (CEFR), which defines the standards of language proficiency in Europe. We offer you an interesting job in the provision of ICT and Data services that have an impact on society, with many advantages: · A good balance between professional and private life; Flexible schedule in the provision of 40 hours per week (7:30 a.m. to 8 p.m. with fixed slots between 9 a.m. and 12 p.m. and 1 p.m. and 4 p.m.); Possibility of teleworking; Workspaces organized according to activities; Easy accessibility via public transport common; Car and bicycle parking in the building; Individual locker; Company restaurant; NL VERSIE FunctieAls Senior .NET Developer speel je een sleutelrol bij het wetwerpen, ontwikkelen en onderhouden van robuste software oplossingen op la base de Microsoft technologiesën. I provide technical expertise, guarantee code knowledge and support the technical mentor of your team. Verantoordelijkheden Actief deelnemen aan de ontwikkeling van software components in .NET (Framework en Core); analysis of the best practices; Gedragsvaardigheden Kritische informatieanalyse en integratie;Gestructureerd en oplossingsgericht denken;Creatief en het bedenken van alternatieven en het trekken van juiste conclusions;Technisch leiderschap en samenwerking;Veerkracht en aanpassingsvermogen aan technische de contextuale veranderingen. Taalvaardigheden: Vloeiend in een de twee landstalen: FR of NL (level C2*) Zeer goed level Engels (level C1*)*De aangegevenlevels komen overeen met het Europees Referentiekader voor Talen (ERK), dat denormen voor taalvaardigheid en Europa vaststelt. We offer you an interesting job in ICT and Data services that has an impact on society, with many advantages: · A good balance between work and private life; Flexible working hours of 40 hours per week (7:30 am to 8:00 pm with fixed periods between 9:00 am and 12:00 pm, 1:00 pm and 4:00 pm); The possibility of teleworking; Workplaces organized according to activities; Good accessibility to public transport transportation; Parking for cars and bicycles in the building; Individual lockers; Company restaurant; · Various opportunities for self-development: training and internship opportunities (can be followed outside working hours) via our e-academy self-training platform or via the Microsoft Enterprise Skills Initiative platform.
Required Skills
ASP .NET Web API, Authentication/Authorization (JWT, OIDC, claims), Blazor, C# / .NET (Core, 10), Entity Framework Core, MVC, REST API’s, REST, Swagger/OpenAPI, SQL Server, Testing (unit + integration)
Practical Information
- Company: SMALS
- Location: Brussels – Hybrid
- Start Date: 3 August 2026
- End Date: 31 December 2026
- Duration: 5 months
- Contract Type: Freelance / Mission
- Application Deadline: 16 July 2026