Freelance IT job

Senior Security Engineer

Brussels · apply before 4 November 2026

Job description

  • Start date: as soon as possible
  • Duration: 3 months, with extension option
  • Workload: full-time
  • Location: Brussels, hybrid
  • Remote work: up to 3 days per week; 2 days per week on site required

Who are we?

Every year, 2.5 million Belgians rely on the independent advice of a notary. The client supports notaries so they can focus on helping citizens through important moments in their lives.

The client offers notary offices a broad and innovative range of services and solutions, including legal advice, software tools and support, guidance on office management, and HR solutions.

Your role

As a Security Engineer, you ensure the reliable day-to-day operation of the client’s security solutions and contribute to projects that evolve and strengthen these systems.

  • Analyze and define security requirements.
  • Configure, support and maintain security tools.
  • Manage identity components, user accounts and provisioning processes.
  • Set up and maintain access management components.
  • Monitor security systems and improve observability.
  • Defend systems against unauthorized access.
  • Develop security procedures and make policy recommendations.
  • Provide technical security advice, including expert guidance on OAuth and OpenID Connect.
  • Advise staff, managers and executives on security best practices.
  • Support employee awareness of security procedures.
  • Train employees in security procedures.

You want

  • A hands-on role combining operational security responsibilities with improvement projects.
  • To strengthen identity and access management, authentication and infrastructure security.
  • To translate security requirements into practical solutions and clear recommendations.
  • To share your technical expertise and collaborate effectively with colleagues across the organization.
  • To maintain and continuously update advanced knowledge of systems and methods in line with the current state of the art.

You have

  • Experience working with SSDLC, RUP and Agile approaches.
  • A good understanding of authentication protocols and providers, including OAuth, OpenID Connect, OpenLDAP and Active Directory.
  • Solid knowledge of identity and access management concepts and solutions.
  • Knowledge of application firewalls and web services.
  • Practical scripting knowledge in Linux and/or Windows environments.
  • Previous experience in network security is considered an asset.
  • Knowledge of web services in Auth0 is a plus.
  • Experience with Okta is required.
  • Experience with SailPoint is a plus.

You are

  • An experienced Security Engineer with a practical, solution-oriented mindset.
  • Comfortable administering, troubleshooting and continuously improving security solutions.
  • A clear communicator who can provide sound technical advice to different audiences.
  • Proactive and attentive to reliable operations, security risks and continuous improvement.
  • Fluent in Dutch or French, with a good command of the other language and a strong command of English.

What we offer

  • A pleasant and stimulating working environment.
  • Plenty of room for initiative.
  • The opportunity to contribute to security capabilities that support notaries and the public.
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