.NET Software Developer

ARHS DevelopmentsLeuven

On-site Full-time

Clicking Apply Now takes you to AutoApply where you can tailor your resume and apply.

Experience Level

Mid to Senior

Qualifications

What we are looking for:A minimum of 3 years of hands-on experience in . NET development is essential. Proficiency in C#, . NET Core, ASP. NET, SOLID principles, and RESTful services. Familiarity with modeling tools, such as UML. Experience with integration and deployment tools. Knowledge of Azure, DevOps, and Git. Experience with Angular, React, Blazor, or Vue.js. Adept at adapting to rapidly evolving technologies in application development. Ability to thrive in an international and multicultural environment, demonstrating strong teamwork capabilities. Understanding of existing IT security frameworks and tools for application development and maintenance. A collaborative mindset, with a focus on customer satisfaction, solutions, and continuous improvement. Fluency in English and proficiency in Dutch or French is required. Ability to work independently within an Agile team structure. A proactive, can-do attitude is essential.

About the job

ARHS Developments is in search of a talented . NET Software Developer to join our dynamic team in Leuven. As a key contributor, you will engage in both backend and frontend development, analyze requirements, and create comprehensive specifications. Your role will encompass the development and maintenance of applications, implementation of change requests, and production of detailed technical documentation.

About ARHS Developments

At ARHS Developments, we pride ourselves on being a home for satisfied customers and exceptional consultants. Our new entity, Arηs Technology, headquartered in Leuven, is dedicated to meeting the diverse needs of clients and consultants across Brussels and Flanders. Central to our ethos are values of customer satisfaction, quality, hospitality, and a straightforward approach to business. Our success in project and service delivery is heavily reliant on the technical and functional expertise of our consultants. We bring together the finest experts in our local development center to ensure we deliver top-quality solutions close to our clients. Our holistic approach encompasses all layers of business, technical domains, and service types, with a flexible delivery model offering various collaboration methods: Fixed Price, Time and Means, and Quoted Time and Means.

Similar jobs

Browse all companies, explore by city & role, or SEO search pages. View directory listings: all jobs, search results, location & role pages.

1 - 20 of 309 Jobs

Search for Backend Developer

309 results

Select all on this page (20)

Apply

Senior Backend Developer at Uni Systems | Brussels

Uni Systems

Full-time|On-site|Brussels, Brussels, Belgium

At Uni Systems, we are dedicated to transforming digital visions into tangible realities. Our continuous growth has led us to seek a Senior Backend Developer to join our dynamic UniQue team.Key Responsibilities:Architect, develop, and sustain highly scalable back-end web applications.Seamlessly integrate front-end components with server-side logic.Develop an…

Mar 4, 2026

Apply

Senior Node.js Backend Developer

Jobgether

Full-time|Remote|Belgium

Role overview Jobgether is seeking a Senior Node.js Backend Developer based in Belgium. This position focuses on building secure, scalable backend systems that support digital financial services used globally. The team operates remotely and values both autonomy and initiative. What you will do Design and maintain backend infrastructure using Node.js Develop and support APIs essential to financial products Work with distributed systems and handle real-time data processing Prioritize security, scalability, and performance optimization in all backend work Collaborate with engineers from various regions Keep up with new backend technologies and industry best practices Requirements Proven experience as a backend developer with strong Node.js skills Ability to tackle complex technical challenges Background in backend architecture and distributed systems Interest in performance tuning and building reliable infrastructure Motivated to work within a collaborative, international team Work environment This is a remote-first role based in Belgium. The team spans multiple regions and emphasizes knowledge sharing and continuous learning.

Apr 28, 2026

Apply

Senior Python Backend Developer (Remote from EU)

Almaviva de Belgique

Contract|Remote|Remote job

Almaviva de Belgique is hiring a Senior Python Backend Developer to help advance the CMRE Data Management Programme. This fully remote role is open to professionals based anywhere in the EU. Key responsibilities Design, develop, and maintain backend systems and APIs that can adapt to changing requirements and scale with growth Enhance core data features, including building and refining data catalogues, domain models, and sharing workflows Work closely with a Software Architect to turn architectural plans into secure, high-performance production solutions Contribute to technical decisions and participate in team discussions Own the full software lifecycle, from initial design through deployment Collaboration and workflow The team uses Agile methods and values open collaboration. Colleagues support each other and share knowledge, with mentorship from an experienced Software Architect to help translate ideas into reliable, practical systems. Location This position is remote and open to candidates based in the European Union.

Apr 27, 2026

Apply

GIS Developer - Mid-Level Backend/Frontend/R-Shiny

Altersolutions

Contract|On-site|Brussels

Join Altersolutions, a dynamic company at the forefront of GIS technology, as a GIS Developer specializing in both backend and frontend development, with a focus on R-Shiny applications. This is an exciting opportunity for a professional with a passion for geospatial data to contribute to innovative projects in Brussels.

Apr 7, 2026

Apply

Senior Backend Software Engineer

Showpad

Full-time|Hybrid|Ghent

Location Qualifications:Ghent (hybrid, 2 days in the office)About the RoleAs a Senior Backend Engineer in our AI-focused team, you will play a pivotal role in designing innovative, AI-driven functionalities that transform the operational efficiency of sales teams. You will develop and sustain serverless, event-driven architectures and APIs that seamlessly integrate with external services. Your expertise will guide both technical and product strategies, crafting solutions that harness cutting-edge AI technologies to provide tangible benefits for users. In this role, you will contribute to building a dynamic ecosystem of services, identifying and isolating system components to enhance reliability and ensure high-quality outputs. Your contributions will not just influence product development; they will significantly enhance the user experience for our extensive customer base.Key ResponsibilitiesDesign and implement AI-enhanced features utilizing large language models to streamline and improve user workflows.Collaborate on refining our development processes and environments.Create and maintain integrations with various third-party platforms and APIs.Define, implement, and oversee our expanding ecosystem of microservices.Engage in collaborative coding practices, including code reviews and pair programming, essential to our strong engineering culture.Adopt a security-centric approach in feature implementation and modifications.Mentor and guide junior engineers in best practices and architectural principles.Maintain a holistic view of project outcomes, understanding the impact of your work on over 100,000 users worldwide.

Feb 16, 2026

Apply

Senior Enterprise Java Architect - Backend & Integration

Netcompany

Full-time|On-site|Brussels

Join Netcompany at the cutting edge of technology as a Senior Enterprise Java Architect – Backend & Integration. In this pivotal role, you will:Offer expert insights into the development of enterprise policies and strategies concerning content, records, archives, and information management, which includes capture, selection, retention, and digital preservation.Lead the architecture, design, and upkeep of records, archives, and information management systems while supervising the technical execution of new or updated policies.Conduct requirement analysis and define needs for content, records, archives, and information management systems, creating functional and technical specifications for backend and integration solutions.Design system integration and data migration strategies for legacy repositories, ensuring seamless transitions with minimal disruption.Develop and sustain robust solutions for long-term digital preservation and archiving, complying with legal, security, and compliance standards including encryption, digital signatures, secure access, and data protection.Establish and apply metadata standards for content and records management to facilitate effective archival description and retrieval.Design and implement scalable data publication and exchange solutions, utilizing linked open data, semantic web technologies, and modern API/integration frameworks.

Feb 26, 2026

Apply

Senior Unity Developer - Poker Game Development

jobgether

Full-time|Remote|Belgium

As a Senior Unity Developer focused on poker game development, this position centers on building engaging gaming experiences in Unity. The role involves close collaboration with designers and artists to implement new features and refine gameplay. Role overview Work on developing poker games using Unity, with an emphasis on quality and player engagement. The position requires attention to performance and user satisfaction throughout the development process. Collaboration Partner with creative teams, including designers and artists, to translate ideas into polished game features. Communication and teamwork are key as you help shape the player experience. Location This role is based in Belgium.

Apr 29, 2026

Apply

.NET Software Developer

ARHS Developments

Full-time|On-site|Leuven

ARHS Developments is in search of a talented .NET Software Developer to join our dynamic team in Leuven. As a key contributor, you will engage in both backend and frontend development, analyze requirements, and create comprehensive specifications. Your role will encompass the development and maintenance of applications, implementation of change requests, and production of detailed technical documentation.

Mar 21, 2022

Apply

Fullstack .NET Developer

Sopra Steria

Full-time|On-site|Brussels

Join our dynamic team as a Fullstack .NET Developer, where you will play a crucial role in designing and developing innovative software solutions. You will collaborate closely with cross-functional teams to create high-quality applications that meet the needs of our clients.In this role, you will utilize your expertise in .NET technologies to build scalable web applications and services. Your contributions will help enhance our systems and drive efficiency across various projects.

Apr 24, 2025

Apply

Java Developer

Sopra Steria

Full-time|On-site|Brussels

Join Sopra Steria as a Java Developer and contribute to innovative projects that shape the future of technology. You will work in a dynamic environment alongside a talented team, developing high-quality software solutions that meet our clients' needs.

Jun 26, 2025

Apply

M365/Copilot Developer

nrb

Full-time|On-site|Herstal, Liège, Belgium

Ready to elevate your career?Join our Collaboration Integration team!YOUR MISSIONDesign, develop, and operate Microsoft 365 solutions that integrate SPFx, Power Platform, and copilots/agents through Microsoft Copilot and Copilot Studio, ensuring robust governance, security, and adoption.Transform business needs into intelligent, measurable, and secure experiences within the M365 ecosystem (including Teams, SharePoint, OneDrive, Outlook, etc.).M365 Development: Create web parts SPFx (using React/TypeScript), extensions, and Power Platform solutions (Power Apps, Automate, custom connectors), plus integrate Microsoft Graph.Copilot & Agents: Design business copilots in Copilot Studio (actions, connectors, M365 data), manage prompts, safeguards, and governance (roles, DLP).Grounding & Data: Ensure controlled exposure of sources (SharePoint, OneDrive, M365 files).Security & Compliance: Integrate M365 policies (DLP, retention), adhere to Copilot deployment standards, and promote responsible AI usage practices.DevOps & Industrialization: Utilize Azure DevOps (SPFx, Power Platform Solutions) for packaging and version control.Adoption & Value: Participate in Copilot ideation workshops, measure adoption and impact, and curate a library of prompts and agent patterns.Run & Support: Conduct L2/L3 troubleshooting, optimize performance and costs, and maintain documentation.

Dec 30, 2025

Apply

Drupal Developer

Sopra Steria

Full-time|On-site|Brussels

Join our innovative team at Sopra Steria as a Drupal Developer. We are looking for talented individuals who are passionate about developing and maintaining websites using the Drupal CMS. You will have the opportunity to work on exciting projects that make a difference in our clients' digital experiences.Your role will involve collaborating with cross-functional teams to design, implement, and optimize Drupal-based solutions that meet business requirements.

Jun 26, 2025

Apply

Automation Developer

Sopra Steria

Full-time|On-site|Brussels

Join Sopra Steria as an Automation Developer and be at the forefront of technological innovation. In this role, you will design, develop, and implement automation solutions that enhance operational efficiency and drive business success. You will work closely with cross-functional teams to identify automation opportunities and create robust solutions that meet the needs of our clients.

Mar 6, 2026

Apply

AS 400 / RPG Developer

NRB

Full-time|Hybrid|all cities, Brussels, Belgium

NRB Group is a recognized provider in Belgium’s ICT sector, offering a wide range of IT services that include infrastructure, cloud solutions, software development, consultancy, and managed staffing. The company supports clients across various industries from its base in Brussels and beyond. More details about NRB can be found at https://www.nrb.be/. Role overview The Local Managed Staffing team at NRB is looking for an AS 400 / RPG Developer. This role centers on building and maintaining business applications within the IBM i (AS/400) environment. Candidates based in any city across Brussels, Belgium are welcome to apply. Main responsibilities Design, develop, and maintain RPG programs, including RPG IV, ILE, and Free formats. Address bug fixes, optimize application performance, and ensure reliability. Write and update technical documentation as needed. Support business teams by providing level 2 and 3 assistance for application usage. Participate in projects related to the evolution, migration, or modernization of the IBM i environment. Integrate and test new features, including unit, integration, and acceptance testing. Contribute to ongoing technology monitoring and application modernization efforts within the IBM i landscape.

Apr 21, 2026

Apply

Senior Java Developer

European Dynamics

Full-time|On-site|Brussels, Brussels, Belgium

We are excited to announce an opportunity for a proficient Senior Java Developer who is fluent in English and will be located in Brussels. The selected candidate will have the flexibility to work either from our office or on-site at client locations. In this initial assignment, the chosen individual will collaborate closely with project leaders and supervise the project team.Key Responsibilities: Design and architecture of software components and building blocks; Evaluation and review of existing system architecture; Coordination of technical architecture implementation; Development of functionalities, including testing, technical documentation, deployment, evaluation, and reporting; Conduct data analysis and create data models; Establish technical communication between project leaders and developers; Ensure the consistency of AV Media metadata with the respective media files; Analyze and index AV Media metadata files; Prepare metadata information for media file dissemination and publication. Qualifications: A university degree in IT with a minimum of 11 years of professional IT experience; Strong expertise in Java/J2EE; Advanced knowledge of Oracle and PL/SQL; Familiarity with NoSQL databases (MongoDB, Solr); Proficiency in tools such as CDI, JPA, Reflection, and Spring (MVC, Container, Scheduler, or QUARTZ Scheduler); Understanding of application design and SOA architecture as well as interoperability technologies; Experience with modeling tools and languages (e.g., UML); Proficient in Spring Security, Tomcat, Jira, and jQuery; Knowledge of software development methodologies (e.g., RUP, Agile); Competence in JSON/XML and HTML; Familiarity with middleware infrastructure and web servers, particularly WebLogic; Knowledge of ITIL standards and best practices will be considered an asset; Excellent command of the English language, both written and spoken. Benefits:If you are looking for a rewarding career in a dynamic and exciting company, where you will contribute as part of a team for a major European institution in a multicultural, multilingual environment with real opportunities to make a difference, we encourage you to submit your detailed CV in English, quoting reference: (9481/01/22).We offer a competitive salary package (either contract-based or full benefits), tailored to your qualifications and experience. All applications will be treated confidentially.

Jan 14, 2022

Apply

Innovative Project Developer

ion1

Full-time|On-site|Vlaanderen, Vlaams Gewest, België

Take a pivotal role in the innovative and sustainable development of top-tier real estate projects ADVANCE YOUR CAREERAs a Project Developer, you will contribute (both literally and figuratively) to the creation of innovative and sustainable real estate projects within our Business Unit in Flanders.You will be responsible for all aspects of project development: analyzing, planning, coordinating with project team members (both internal and external), and managing the project budget. Additionally, your commercial skills will be essential for maintaining and expanding your network.To ensure the successful realization of a project, you will collaborate closely with our specialized internal departments: you can rely on a team skilled in Business Development, Finance, Legal, Marketing, Technical, and Sales.PERSONAL AND PROFESSIONAL GROWTHYou hold a Master's degree in business or engineering and have at least 3 years of experience in the real estate sector.You are analytical, meticulous, and proficient in Excel.You pay attention to detail but can quickly shift to a broader overview of the various projects you manage.You possess a natural charisma and enjoy expanding your professional network.You are resilient under pressure.UNIQUE OPPORTUNITIESWe offer a prime opportunity that significantly impacts our business.You will be immersed in an inspiring entrepreneurial culture.You will have a place in our beautiful office at Waregem Business Park.You will enjoy the freedom and independence to organize your work.You will be welcomed into a close-knit group of colleagues who will make you feel at home from day one.

Mar 24, 2026

Apply

PL/1 Developer

NRB

Full-time|Hybrid|all cities, Brussels, Belgium

Looking for a change? Ready for new challenges?Are you eager to advance your career as a PL/1 Developer? Join our Local Managed Staffing team at NRB!As a leader in the ICT sector in Belgium, the NRB Group offers a wide array of IT services, addressing all IT needs, from Infrastructure & Cloud to Software Development and Consulting & Managed Staffing. For more information, visit our website.As a PL/1 Developer, you will be responsible for the technical analysis, development, and maintenance of various applications for internal use and for our affiliates in areas related to accounting and non-profit organizations (ASBLs). You will work on different application layers, including user interface, business logic, and integration. You are capable of working both collaboratively and independently. Your skills and knowledge will enable you to develop, propose technical solutions, document them, and communicate effectively.

Jul 15, 2025

Apply

Delphi Developer at Tunga | Remote

Tunga

Full-time|Remote|Remote job

Profile Overview: Seeking an innovative Delphi Developer.Developer Profile: Our client is in search of talented developers proficient in Object Pascal technologies, including Delphi, Free Pascal, and .NET.Key Responsibilities:Collaborate with a dynamic team to develop software components utilizing Object Pascal technologies (Delphi, Free Pascal, .NET).Participate in the software development process across various platforms, such as Windows, Web, Android, iOS, macOS, Linux, and Raspberry Pi.Coordinate with cross-functional teams to ensure smooth integration of software components.Technical Expertise Required:Demonstrated experience in software development with Object Pascal, showcasing proficiency in Delphi, Free Pascal, and .NET.Familiarity with development frameworks, including VCL, FMX, LCL, FNC, and ASP.NET.Deep understanding of project development for various platforms, including Windows, Web, Android, iOS, macOS, Linux, and Raspberry Pi.Strong analytical and problem-solving abilities, with a proactive approach to overcoming development challenges.Ability to collaborate effectively within a team-oriented environment.Excellent communication skills for consulting services and custom project development.Awareness of industry best practices and a commitment to delivering top-notch software solutions.

Feb 21, 2024

Apply

Frontend Software Developer

Sopra Steria

Full-time|On-site|Brussels

Join our dynamic team at Sopra Steria as a Frontend Software Developer, where you will play a vital role in creating innovative and user-friendly web applications. We are looking for a passionate professional who is eager to work with the latest technologies and contribute to exciting projects that shape the future of digital solutions.

Jun 26, 2025

Apply

Frontend Software Developer

Sopra Steria

Full-time|On-site|Brussels

Join our dynamic team as a Frontend Software Developer at Sopra Steria, where you will play a pivotal role in developing cutting-edge web applications. Your expertise in frontend technologies will help us deliver exceptional user experiences that transform the way our clients engage with technology.

Apr 24, 2025

Create account — see all 309 results

Browse all companies, explore by city & role, or SEO search pages. View directory listings: all jobs, search results, or location & role pages.