OneSource Consulting

About the Company

OneSource is a pan European based recruitment, employment agency founded in response to the market demands for more flexible, cost-effective, tailored recruitment solutions. It aims at providing high-quality services to provide the best outcomes in the recruitment and employment of personnel from a diverse set of business sectors.

In today's highly competitive and ever-changing IT market, hiring the right candidate can
make the difference between success and failure of any mission-critical project.
We can navigate you through the complexities involved and the demands of 'Right-Sourcing'.
With our team having close to two decades of staffing proficiency, our staffing solutions will
help you accelerate your hiring strategy(s).

At ONESource, our philosophy is to be a true value-add to customers, businesses, and
stakeholders. Unwavering ethics, honesty, innovation, and excellence are the cornerstones of
our business, which translates into every work we undertake.

Listed Jobs

Company Name

OneSource Consulting

Job Title

Infrastructure Engineer

Job Description

Job Title: Infrastructure Engineer Role Summary: Provide network and Azure security support within the Digital Security Office, design and implement secure network solutions, maintain security policies, documentation, and secure configurations, and participate in ongoing projects to optimize network flows and firewall policies. Expactations: Pragmatic, analytical thinker with a strong work ethic, team‑oriented, “can‑do” mindset; excellent written and verbal English; fluent in Dutch or French; capable of communicating technical concepts to non‑technical stakeholders. Key Responsibilities: - Design and implement network security solutions across corporate, Azure, and workplace environments. - Maintain security policies, procedures and documentation. - Assist in designing a new management network and secure baselines for datacentre infrastructure. - Configure and manage secure workplace environment settings. - Optimize network flows and firewall policies; secure integrations with external solutions. - Set up out‑of‑band networks for large datacentre deployments. Required Skills: - In‑depth knowledge of networking, firewall and proxy technologies. - Understanding of network connectivity and security for workplace and Azure. - Experience securing internal network flows and external integrations. - Experience deploying out‑of‑band networks for datacentres. - Strong communication, analytical and problem‑solving abilities. - Fluency in English and native or fluent Dutch or French. Required Education & Certifications: - Bachelor’s degree in Computer Science, Information Technology or related field (or equivalent professional experience). - Networking or security certifications (e.g., CCNA, CCNP, Security+) preferred.

Brussels, Belgium

On site

06-01-2026

Company Name

OneSource Consulting

Job Title

Network Engineer

Job Description

Job Title: Network Engineer Role Summary: Network Engineer responsible for designing, deploying, and maintaining secure, high‑availability network infrastructures for data centers and decentralized sites within a national IT line. Duties include server migration, physical installation, cabling, firewall configuration, and ongoing support to decentralized teams. Expactations: - Implement robust, secure network solutions that meet national infrastructure standards. - Execute server migration plans on schedule with minimal downtime. - Support decentralized teams through training and troubleshooting. Key Responsibilities: - Create and execute migration plans for physical server relocation to new data centers. - Install and configure network equipment (pfSense/OPNsense, Cisco switches/routers) in high‑availability environments. - Wire racks, perform cabling management, and ensure optimal server placement. - Configure and manage firewalls, VPNs, and secure network architectures. - Conduct site-to-site physical connections and integrate local networks into the national network. - Provide technical support, diagnose network issues, and offer end‑user assistance with VPN connections. - Coordinate with decentralized teams to optimize network design, scalability, and security. - Deliver basic training to teams for self‑maintenance of secure network operations. Required Skills: - Proficient with pfSense, OPNsense, and Cisco network equipment. - Experience designing and operating high‑availability networks. - Strong understanding of network security, VPN technologies, and firewall management. - Practical knowledge of data center physical installation, rack‑and‑stack procedures, and cabling standards. - Ability to diagnose and resolve network problems efficiently. - Linux administration experience; familiarity with virtualization platforms (KVM, Proxmox) an asset. - Excellent teamwork, communication, and problem‑solving abilities. - Proficient in English; knowledge of at least one national language required (Dutch or French). Required Education & Certifications: - Bachelor’s degree in Computer Science, Information Technology, or a related systems‑focused discipline. - Relevant networking certifications (e.g., CCNA/CCNP, CompTIA Network+, or equivalent) preferred. - Firewall and security certifications (e.g., pfSense Certified, OPNsense Associate) are a plus.

Brussels, Belgium

On site

08-01-2026

Company Name

OneSource Consulting

Job Title

Java Technical Lead

Job Description

**Job Title** Java Technical Lead **Role Summary** Lead the design, development, and delivery of a Java-based educational platform (EPSOC) for a public administration project. Own architecture, code quality, performance, and deployment of the solution. Act as a technical mentor and liaison among developers, QA, stakeholders, and project management. **Expectations** - Deliver high‑quality, maintainable code that meets functional specifications and quality standards. - Apply clean‑code principles (SOLID, DRY, etc.) and reduce technical debt. - Manage architecture documentation and ensure alignment with project goals. - Mentor team members and promote best practices. - Coordinate with stakeholders to maintain clear communication and progress reporting. **Key Responsibilities** - Create and maintain architecture and design documents. - Lead technical analysis and translate functional specifications into detailed design. - Develop, unit test, review, and refactor application modules using Java 8/21, JEE 7, JSF 2, JPA 2, JAX‑WS, JAX‑RS, Spring Boot 3, and Angular 21. - Optimize performance and memory usage; conduct code reviews and ensure adherence to coding standards. - Validate deployments with GitLab CI/CD, Maven, and Nexus; ensure solutions run correctly in all environments. - Facilitate corrective and evolutionary maintenance activities. - Ensure timely delivery and quality in line with defined standards. - Mentor developers and provide technical guidance. - Communicate progress, risks, and technical decisions to project leaders and stakeholders. **Required Skills** - Proficient in Java, JEE, Java EE technologies (JSF, JPA, JAX‑WS, JAX‑RS), Spring Boot, and Angular. - Experience with IBM DB2, GitLab CI/CD, Maven, and Nexus. - Strong grasp of clean‑code, SOLID, DRY, and refactoring techniques. - Ability to develop and review unit tests, perform performance tuning, and manage releases. - Excellent collaboration, communication, and mentorship abilities. - Fluency in French (project is conducted exclusively in French). **Required Education & Certifications** - Bachelor’s degree in Computer Science, Software Engineering, or related field. - Relevant certifications (e.g., Oracle Certified Professional, Java SE; Spring Certification; Angular‑Developer).

Brussels, Belgium

Hybrid

Senior

16-01-2026

Company Name

OneSource Consulting

Job Title

Cloud Engineer

Job Description

Job Title: Cloud Engineer Role Summary: Design, build, and maintain cloud‑native MLOps and AI platform services on AWS, enabling data scientists and analysts with scalable, secure, and reliable workflows for model training, serving, and monitoring. Expectations: • Strong passion for cloud, data, and AI technologies. • Continuous learner, staying current on industry trends. • Excellent communication and collaboration for cross‑functional teams. Key Responsibilities: • Host multi‑user Jupyter environments and cloud IDEs. • Provide frameworks for batch‑processing model training, storage, serving, and monitoring. • Expose trained models via low‑latency APIs. • Enable Generative AI initiatives. • Design and implement infrastructure using Terraform, Docker, Kubernetes, and AWS services. • Automate data processing and model lifecycle workflows with Airflow, Spark, and Python. • Ensure platform reliability, performance, and cost efficiency. • Onboard and troubleshoot end‑users. • Contribute to evolving MLOps best practices. Required Skills: • Python programming and data science ecosystem. • Cloud infrastructure experience (AWS preferred). • Docker & Kubernetes proficiency. • Infrastructure‑as‑code with Terraform. • CI/CD tools (Jenkins, GitHub Actions). • Big data tools (Spark). • Strong problem‑solving and code‑review abilities. Required Education & Certifications: • Master’s degree in ICT, Engineering, Business Engineering with Informatics focus, or equivalent experience. • Relevant certifications (e.g., AWS Certified Solutions Architect, Terraform Associate) are a plus.

Leuven, Belgium

On site

19-01-2026