{"id":2292974,"url":"https://alion.io/job/proximus-mobile-core-engineer-sim-for-things","title":"Mobile Core Engineer (Sim for Things)","company":{"id":54371,"name":"Proximus","domain":"proximus.com","url":"https://alion.io/company/proximus","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Phenom","truth_index":{"grade":"B","score":80,"open_postings":7,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":21,"computed_at":"2026-10-12T06:55:09Z"}},"role":"Mobile","role_family":"Mobile","seniority":"staff","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Brussels, Belgium"],"countries":["BE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":107000,"max_usd":236000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":74},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"GCP","optional":false}],"status":"live","first_seen_at":"2026-09-16T00:00:00Z","employer_posted_date":"2026-09-16","last_verified_at":"2026-10-12T13:43:04Z","board_verified":true,"closed_at":null,"days_open":26,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":26},"description":"Proximus Global, combining the strengths of Telesign, BICS, and Route Mobile, is shaping the future of communications and digital identity.\nOur mission is simple : to enable seamless global connectivity and trusted engagements that power the world's interactions.\nTogether, 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.\nOur 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.\n\nKey highlights\n\nPowering more than 13 billion digital communications every month\n\nSupporting over 3,500 active customers through a presence in 50+ global offices across 100+ countries\n\nManaging 50% of global roaming data traffic and connecting 150 million IoT devices\n\nDriving innovation in 5G, private networks and IoT, reinforcing our position in next-generation communications\n\nWhy Proximus Global?\n\nGlobal & Inclusive\nWork with diverse teams across 100+ countries, in a truly international and connected environment.\n\nOwnership & Trust\nTake initiative, make decisions and own your impact with real autonomy.\n\nInnovation with Purpose\nContribute to meaningful solutions in global connectivity, combining technology, platforms and expertise across Proximus Global.\n\nGrowth Mindset\nContinuously learn, challenge the status quo, and grow across our global organisation.\n\nPlease note: this role requires working from the Brussels office 2 to 3 days per week. It is not a fully remote position and is offered on a permanent contract (not freelance).\n\nAbout the role\nAt Proximus Global, we’re looking for a Mobile Core Engineer to join our SIM for Things (SFT) team.\nAt Proximus Global, we’re looking for a Mobile Core Solution Design Engineer Expert to join our SIM for Things (SFT) team. In this role, you will lead and contribute to the analysis, design, development, and delivery of end-to-end mobile core solutions for IoT connectivity based on business, technical, operational, cost, time-to-market, and regulatory requirements.\nWorking at the intersection of technology, product, and operations, you will balance third-party/vendor solutions with internal development and integration work. From initial requirements and architecture impact analysis to the production launch, you will take end-to-end ownership across the project lifecycle, driving platform evolution and technology assessments. You’ll collaborate closely with cross-functional teams to ensure high-quality, scalable solutions and an exceptional customer experience.\nWhat you’ll do\nReview and validate technical solutions to confirm they meet business, regulatory, operational, cost, time-to-market, and quality requirements.\nLead technical platform development, shape the platform roadmap, maximize technology use, and perform technology assessments for future solution evolution.\nLead or support end-to-end implementation projects across the lifecycle, coordinating with stakeholders on design, rollout, optimization, and ongoing maintenance.\nDraft and review detailed functional and technical specifications, as well as Request for Proposal (RFP) documents.\nDrive architecture and impact analysis, developing methods, procedures, and technical documentation for product, marketing, and operational teams.\nEngage directly in the implementation and deployment of technical solutions in close collaboration with operational teams.\nAct as a respected technical authority and reference point, applying call-flow analysis and troubleshooting expertise to support internal and external stakeholders while building credibility and trust.\nWhat you bring\nExperience & technical expertise\nEngineering degree preferably in Telecommunications, or a related field.At least 10 years of professional experience in a telecom or IT environment.\n\nSolid understanding of the overall telecommunications, mobile core, and IT landscape.\nProven experience in designing and deploying mobile core network solutions across traditional and cloud-based environments (AWS, Azure, or Google Cloud).\nDeep experience with IoT / M2M connectivity platforms (including SIM for Things) and multi-tenant environments with large-scale device connectivity.\nTechnical proficiency in key network protocols and signaling: HTTP, SS7, Diameter, MAP, INAP, and GTP.\nStrong expertise in SIM/eSIM technologies: SIM applets, Over-The-Air (OTA) management, Remote SIM Provisioning (eUICC, SM-DP/SM-SR, SM-DP+, GSMA SGP.31/32), SIM file systems, and provisioning/ordering workflows.\nStrong background in roaming, IoT/M2M, and MVNO/MVNE environments.End-to-end view of mobile core architecture, call flows, and deep-dive troubleshooting.\n\nHands-on knowledge of two or more mobile core components across 2G, 3G, LTE, and 5G networks (e.g., P-GW/GGSN, HSS/HLR, PCRF).\nNice to have\nKnowledge of the international carrier business.\nYour soft skills\nStrong communicator with excellent presentation, negotiation, and interpersonal skills, capable of explaining complex technical concepts to different audiences.\nCollaborative team player, comfortable coordinating work flexibly across departments in an international and culturally diverse environment.\nCustomer-focused and solution-oriented with a strong sense of ownership and determination to deliver projects on time and meet expectations.\nAnalytical thinker and problem solver with strong planning, organization, and project management capabilities.\nProactive approach to risk management, with an eagerness to learn autonomously and grasp existing solutions quickly.\nComfortable navigating technical complexity and prioritizing effectively.\n\nYour Benefits\nA competitive base salary and short-term incentives, including a yearly bonus linked to individual and company performance\nComprehensive insurances including hospitalization insurance, outpatient care insurance, life insurance, disability insurance and travel insurance, fully funded by PXG\nA supplementary pension plan, fully funded by PXG\nA flexible mobility package including a company car or car allowance, a mobility budget for flexible commuting including a fuel card, bike lease options, etc.\nA telco offer including free internet at home, budget for a mobile phone, a monthly phone plan and many discounts on the Proximus products catalog\nAdditional benefits such as meal and eco vouchers, 32 vacation days, corporate discounts through Benefits@Work, …\nWellbeing at work: yoga and pilates classes, corporate events, etc.\n\nDiscover Proximus Global\nGet a flavour of Proximus Global activities by watching our video.\n\nWatch the video","description_format":"text","description_chars":7116,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Life insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Design & Creative","Government","Branding","Information 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