Operations Engineer - Senior

Freelancer Opportunity!!!

Job title: Sr. Service Engineer (VAS & OCS)

Job location: Brussels, Belgium

Job duration: 2025-12-01 to 2026-05-31 (possible extension)

Job weekly hours: 40 hrs./week

Role description:

Collaborate with engineers in the Value-Added Services Domain on Messaging Services, Service delivery platforms or on Online Charging System (OCS)

Core Responsibilities:

Expertise in the field of messaging services and/or Service delivery platforms or Expertise in Online Charging Platforms (Huawei or Nokia OCS) or expertise with security requirements and compliance for Value Added Services (VAS) platforms (e.g., NIS2, GDPR), including risk assessment, secure integration, and implementation of security upgrades.

Assess/develop design documentation from suppliers.

Coordinate with internal stakeholders and Value-Added Services suppliers.

Ensure that the delivered products meet quality standards and requirements.

Support in testing new functionalities of Value-Added Services.

Provide technical support to internal teams regarding Value Added Services.

Participation in 24/7 on-call duty for critical incidents.

Profile/Required knowledge and experience

Knowledge (preferably) of application development and Low code platforms (SDP)

Basic telecommunications network technologies for VAS, such as IMS, SIP/ISC, Camel, INAP, MAP, Diameter (must have).

IT integration: SOAP, REST, WSDL, XML, JSON, JavaScript, other web technologies (nice to have).

Experience with Agile way of working, or willing to learn it.

Experience with managing suppliers and/or third parties.

Knowledge of mobile networks such as 3GPP, 4G LTE, 5G and protocols such as CAP/Diameter/SBI.

Experience with Unix/Linux operating systems and databases such as Oracle/MySQL/Postgres.?

Familiar with monitoring tools like Prometheus, SPLUNK, Elastic search.?

Analytical skills for problem-solving within the domain of Messaging/Service Delivery Platform services.

Ability to work independently as well as part of a team.

Good communication skills.

Proficiency in English is a must; Dutch and French is a plus.

Extra info:

Value added Services is key, experience with security (NIS2) is highly recommended

Experience in Telco business is a must

Option to extend

Apply now and start your journey with Team Possible! We want to get to know you.

After your application, we will verify your profile and get back to you within 3

working days.

If you’re successful, you can expect the following steps:

An initial conversation with our recruiter - Swati Kumari

Interview with the Hiring Manager and the team.

Final decision

About Proximus

We are Team Possible turning tech into opportunities.

We are driven by four core pillars: "I care," "I make a difference," "I radically simplify," and "I embrace the future". This means you'll join a team that genuinely cares for customers and colleagues, is empowered to make a real impact, strives to radically simplify complex challenges, and is always looking ahead to embrace the future of technology. We believe in an inclusive and safe environment where everyone can thrive, offering extensive career development resources, including access to over 5,000 training modules and a minimum of 5 days of training per year, to help you continuously learn, grow, and tackle bold challenges with us.