Brussels, Belgium We are looking for an experienced developer who can combine strong technical expertise with a collaborative mindset to design, build and optimize business-critical applications.As a Senior .NET & JavaScript Developer, you will be part of a dynamic development team responsible for creating and enhancing applications that support vital business domains. You will take ownership of technical challenges, contribute to solution design, and ensure high-quality deliverables. In some cases, you may also step into the role of technical lead, guiding release management and coaching team members. Key Responsibilities Develop and maintain application components. Contribute to the design of application components in close collaboration with the team. Analyze technical issues and propose innovative, effective solutions. Lead development activities when required, including release management. Collaborate with functional analysts, IT architects, and operations teams. Mentor colleagues on frameworks, tools, and best practices. Deliver clear technical documentation, guidelines, and tested code. Qualifications Languages: Fluent in French, Dutch, and English. Experience (mandatory, non-negotiable) : 5+ years in front-end development. 5+ years in JavaScript/TypeScript. 5+ years in Angular. 5+ years in HTML/CSS. 5+ years in .NET/C# development. Excellent knowledge of .NET development (ASP.NET Framework & Core, C#). Excellent knowledge of web front-end technologies (Angular, HTML, TypeScript/JavaScript, CSS, XML). Good knowledge of SharePoint development, PowerShell scripting, SQL Server, REST API design & implementation. Experience with automated testing tools (unit tests, integration tests, Selenium, Postman). Why Join Us? Work on challenging and impactful projects using the latest technologies. Be part of an international and collaborative environment. Opportunity to share knowledge and coach peers, while continuously growing your own expertise. Competitive package and work-life balance (including flexible teleworking). If you are a passionate Senior .NET & JavaScript Developer eager to make an impact, we'd love to hear from you. Apply now and bring your expertise to the next level by ABAKUS IT-SOLUTIONS Opportunities are numerous. From bare applications development to of IT infrastructures management including conception, architecture and requirements analysis. Although open to technologies used by our customers, ABAKUS IT-SOLUTIONS seeks mainly but not only consultants mastering: Windows and Linux Servers, networks, developments (JAVA, SAP, .NET,…) as well as highly specialized experts for example in cybersecurity or in Content Management System (CMS) (SharePoint, Drupal, WebLogic…). In terms of non-technical competencies, ABAKUS IT-SOLUTIONS hires dynamic persons, open to the world, interested by innovation and having a keen sense of client relationship. A very good command of English is essential, the capacity to speak French, German or Dutch is an asset. Even though most of our positions require at least 3 years of experience, some are open to new starters. ABAKUS IT-SOLUTIONS works either in its premises or in our customer's one, remote activities are sometime possible.