Senior .NET Software Developer

NET Software Developer About the Role ilionx is looking for an experienced .NET Software Developer to contribute to challenging software development projects for a variety of leading companies in the Netherlands. In this role, you will help create scalable, efficient, and future-proof software solutions while contributing throughout the development lifecycle, from gathering requirements through implementation and optimization. You will work as part of high-performance, multidisciplinary teams and use modern technologies and frameworks to turn complex business challenges into effective applications. Projects may include building new applications, optimizing existing software, and integrating Azure services. Success in this role requires strong technical expertise combined with analytical thinking, collaboration, adaptability, and a customer-focused approach. Key Responsibilities Develop innovative, high-quality, scalable, and efficient software solutions using .NET and C#.Contribute throughout the software development lifecycle, from gathering requirements to implementation and optimization.Build new applications and enhance existing software solutions.Design and implement solutions for complex technical and business challenges.Work with modern technologies and frameworks to deliver future-proof applications.Integrate Azure services into software solutions.Collaborate with high-performance, multidisciplinary teams on projects for leading companies in the Netherlands.Work effectively with internal colleagues and external customers.Analyze technical challenges and develop efficient, effective solutions.Understand customer needs, challenges, and objectives to provide appropriate technical solutions.Adapt to new technologies, working methods, customer requirements, and unexpected situations.Contribute to a culture of collaboration, knowledge sharing, innovation, and continuous development.Required Qualifications Minimum 3 years of experience in a similar role.Extensive experience with the .NET Framework.Strong proficiency in C#.Experience with .NET Core.Experience with Azure and understanding of its capabilities.Experience with relational databases such as SQL Server or PostgreSQL.Experience with cloud solutions.Experience with CI/CD methods.Strong analytical and problem-solving skills.Ability to collaborate effectively in multidisciplinary teams.Good command of the Dutch language, both written and spoken.Availability for 32–40 hours per week.HBO and/or WO educational level.Preferred Qualifications Knowledge of front-end technologies such as Angular or React.Additional experience with modern technologies and frameworks relevant to software development.Skills & Competencies .NET software developmentC# programming.NET CoreAzure and cloud solutionsRelational databasesSQL Server and/or PostgreSQLCI/CD methodsAnalytical thinkingTechnical problem-solvingCustomer-focused communicationCollaboration in multidisciplinary teamsAdaptability to new technologies and working methodsUnderstanding customer needs and business challengesSoftware optimization and solution developmentRequirements gatheringEducation & Experience Education HBO and/or WO educational level.Experience Minimum 3 years of experience in a similar role.Extensive experience with the .NET Framework and C#.Experience with .NET Core, Azure, cloud solutions, CI/CD methods, and relational databases such as SQL Server or PostgreSQL.Work Arrangement & Schedule Location: Haren, NetherlandsWork arrangement: HybridEmployment: Full-timeAvailability: 32–40 hours per weekWorking hours: Flexible; own scheduling is possibleWork location can include the ilionx office, customer locations, or working from home.Compensation & Benefits Salary: approximately €3,500–€5,500 based on a full-time position.Permanent contract from the start.Attractive bonus from the first working day.Generous mobility allowance, including private use.Budget for purchasing and setting up a home office.Home working allowance.Good pension scheme.Lease car or mobility allowance.Lease bicycle scheme.Hybrid working environment.Training tailored to your development, including certifications.Opportunities for personal and professional development.Challenging working environment.Events and social gatherings.Time for relaxation.Flexible public holidays.Good overall employment conditions.Compliance / Additional Information ilionx values collaboration, knowledge sharing, curiosity, innovation, and continuous professional development. Regional teams bring together experts from Software Development, Data & AI, and Hyperautomation to support knowledge development and career growth. The requirements listed above provide direction for the profile sought for this position. Candidates who do not meet every requirement but believe they are a strong fit are also encouraged to apply.