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Open nowPosted 79 days ago

Mobile Core Engineer (Sim for Things)

EURES job mobility portal122,767 open roles

Where
de Bruxelles-Capitale/Arr. Brussel-Hoofdstad, Belgium
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Your applicationOpen nowMobile Core Engineer (Sim for Things)EURES job mobility portal · de Bruxelles-Capitale/Arr. Brussel-Hoofdstad, Belgium

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7.7% of postings close within 7 days. Measured by our own scanner across the market.

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  4. 14.0%14 days
  5. 33.7%30 days
This job: posted 79 days ago

The posting

Proximus Global, combining the strengths of Telesign, BICS, and Route Mobile, is shaping the future of communications and digital identity.

Our mission is simple : to enable seamless global connectivity and trusted engagements that power the world's interactions.

Together, our solutions fuel innovation across the world's largest companies and emerging brands. With a truly global reach, we enable businesses to create engaging customer experiences while integrating fraud protection across the entire lifecycle.

Our portfolio covers global voice, messaging and data connectivity, alongside 5G and IoT solutions. It also includes digital identity, verification and CPaaS platforms for personalised, omnichannel engagement. Through these capabilities, we help businesses and communities stay connected, secure and ready to grow. Today, we reach more than 5 billion subscribers, secure over 180 billion transactions every year, and connect more than 1,000 destinations worldwide — delivering on our commitment to connect, protect and engage everywhere

Key highlights

Powering more than 13 billion digital communications every month

Supporting over 3,500 active customers through a presence in 50+ global offices across 100+ countries

Managing 50% of global roaming data traffic and connecting 150 million IoT devices

Driving innovation in 5G, private networks and IoT, reinforcing our position in next-generation communications

About the role

At Proximus Global, we’re looking for a Mobile Core Engineer to join our SIM for Things (SFT) team. In this role, you will design and deliver end-to-end mobile core solutions for IoT connectivity, working at the intersection of technology, product, and operations. From requirements to production, you’ll take ownership of solutions and help shape the evolution of our platforms. You’ll collaborate closely with cross-functional teams to ensure high-quality, scalable solutions and a seamless customer experience.

What you’ll do

  • Design and validate technical solutions aligned with business, operational, and regulatory requirements
  • Contribute to the roadmap and evolution of mobile core platforms
  • Lead or support end-to-end implementation projects (design, rollout, optimisation)
  • Draft and review functional & technical specifications and RFPs
  • Drive architecture and impact analysis, and produce technical documentation
  • Collaborate closely with operations, product, and marketing teams
  • Act as a technical reference point, supporting internal and external stakeholders

What you bring

  • Experience & technical expertise
  • Degree in Telecommunications, IT, or related field
  • ~6+ years of experience in a telecom or IT environment
  • Strong experience with IoT / M2M connectivity platforms (SFT)

Solid understanding of:

  • eSIM & Remote SIM Provisioning (GSMA SGP.31/32)
  • SIM lifecycle management & provisioning workflows
  • Multi-tenant environments & large-scale device connectivity
  • Experience with SIM file systems, applets, and SIM ordering processes

➕ Nice to have

  • Knowledge of mobile core components (2G/3G/LTE – HLR, HSS, PCRF, etc.)
  • Understanding of protocols: HTTP, SS7, Diameter, MAP, GTP
  • Experience in roaming, IoT, MVNO/MVNE environments
  • End-to-end view of mobile core architecture and call flows

Your soft skills

  • Strong communicator, able to translate technical concepts for different audiences
  • Collaborative team player in an international environment
  • Customer-focused with a strong sense of ownership
  • Analytical, structured, and solution-oriented
  • Proactive, with solid organisation and project management skills
  • Comfortable navigating complexity and prioritising effectively
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