{"id":990694,"url":"https://alion.io/job/espace-real-estate-sim-management-5g-core-engineer","title":"SIM Management, 5G Core Engineer","company":{"id":2438005,"name":"E-Space","domain":"e-space.com","url":"https://alion.io/company/e-space-com","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"C","score":68,"open_postings":105,"ghost_share":0.524,"stale_share":0,"repost_share":0.038,"time_to_fill_p50_days":52,"computed_at":"2026-10-21T05:46:15Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","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":["Santa Clara, United States","Arlington, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":170000,"max":200000,"currency":"USD","period":"year","gross":null,"usd_annual":200000},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Helm","optional":false},{"name":"Incident Management","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"Tcpdump","optional":false},{"name":"Unix","optional":false},{"name":"Wireshark","optional":false},{"name":"API Gateway","optional":true}],"status":"live","first_seen_at":"2026-09-16T21:28:44Z","employer_posted_date":"2026-09-16","last_verified_at":"2026-10-21T16:14:37Z","board_verified":true,"closed_at":null,"days_open":34,"trust":{"level":"ok","repost_count":1,"flags":["company_stale"],"days_open":34},"description":"Ready to make connectivity from space universally accessible, secure and actionable? Then you’ve come to the right place!\nE-Space is bridging Earth and space to enable hyper-scaled deployments of Internet of Things (IoT) solutions and services. We are building a highly-advanced low Earth orbit (LEO) space system that will fundamentally change the design, economics, manufacturing and service delivery associated with traditional satellite and terrestrial IoT systems.\nWe’re intentional, we’re unapologetically curious and we’re 100% committed to innovate space-based communications and deliver actionable intelligence that will expand global economies, protect space and our planet and enhance our overall quality of life.\nThe SIM Management 5G Core Engineer will analyze, design, implement, and verify the configuration and integration of subscriber data management nodes(UDR / UDM), networks, and systems across our 5G infrastructure. Your scope of work includes introduction, upgrade, expansion, functionality, and capacity scenarios on modern cloud-native UDM and UDR deployments. You will be a key contributor to the convergence of subscriber databases as platform evolves - and your work will directly shape the reliability and scalability of the networks our partners depend on.\nKey Responsibilities\nAs part of the 5G Core team, you will own the subscriber data management platform across our network generations. Your responsibilities include:\n\nManage and operate UDR, and UDM nodes across 5G core domain, ensuring high availability and data integrity for subscriber profiles.\n\nDesign and maintain subscriber provisioning workflows, including IMSI/MSISDN management, service profiles, and roaming configurations.\n\nImplement and verify HTTP/2-based (N8, Nudm) interfaces connecting subscriber data nodes to AMF and other core elements.\n\nUse and build dashboards to monitor subscriber node KPIs, quickly surface abnormal conditions, and identify patterns before they become outages.\n\nOwn incident management for the subscriber data domain: follow communications procedures for internal escalation and external vendor coordination, ensuring SLAs are met.\n\nPerform maintenance, security audits, patching, and emergency response for UDM/UDR platforms.\n\nUndertake fault handling and corrective actions at node, service, and infrastructure level, including protocol trace analysis (Wireshark/tcpdump) on HTTP/2 signaling.\n\nLead and contribute to project activities: E2E introduction of new subscriber management nodes, capacity expansions, software upgrades, and feature activations.\n\nSupport onboarding by configuring subscriber data repositories, IMSI ranges, and roaming agreements in UDM/UDR systems.\n\nCollaborate with teams to resolve cross-domain subscriber authentication and registration issues.\n\nKey Qualifications\nAt least 10 years of experience in core network engineering with a focus on subscriber data management in 5G Core networks.\nTechnical - Subscriber Data Management\nDeep operational knowledge of HSS/HLR or UDR/UDM platforms.\n\nHands-on experience with configuration and troubleshooting.\n\nPractical experience with 5G UDM and UDR, including cloud-native deployments (containerized/Kubernetes-based NFs) and HTTP/2 SBI interfaces (N8, Nudm_SubscriberDataManagement, Nudr_DataRepository).\n\nSolid understanding of subscriber profile structures: 5GS subscription.\n\nExperience with IMSI/MSISDN range management, number portability (NP/MNP) integration, and SIM/eSIM provisioning workflows.\n\nTechnical - Network & Systems\nWorking knowledge of 5G SA (AMF/SMF/UDM/UDR/AUSF/UDSF) core architectures and their subscriber data flows.\n\nFamiliarity with 3GPP standards governing subscriber data: TS 29.503/29.504 (UDM/UDR SBI), TS 23.502 (5G procedures).\n\nComfortable with Linux/Unix-based systems - able to navigate shells, interpret logs, manage processes, and perform basic system administration on telecom NF hosts.\n\nHands-on with Wireshark, tcpdump, and vendor-specific trace tools for deep analysis of MAP, Diameter, and HTTP/2 subscriber signaling.\n\nExperience with high-availability configurations for subscriber databases: active/standby, geo-redundancy, and database replication/synchronization.\n\nFamiliarity with cloud-native telecom platforms (Kubernetes) and Helm-based NF lifecycle management.\n\nEducation & Background\nBachelor's or Master's degree in Telecommunications, Computer Science, or equivalent; post-graduate studies are a plus.\n\n10+ years of core telecommunications network experience, with a minimum of 5 years hands-on with HLR, HSS, UDR, or UDM platforms.\n\nBonus Points for the Following\nExperience with 3GPP NTN core adaptations (Rel-17/18): satellite access node (SAN) architecture, timer and window parameter adaptation for high-latency links, or UPF placement in non-terrestrial topologies.\n\nBackground in MVNO core architecture: roaming interfaces (N32/SEPP, Diameter S6a/S9), multi-PLMN federation, MVNO interconnect, or eSIM/SM-DP+ integration.\n\nFamiliarity with 3GPP SA2/CT4 specifications or direct standards contribution experience.\n\nExperience with NEF or network exposure APIs and B2B API gateway architecture.\n\nBackground in SIM provisioning platforms, subscription management, or UDM/HSS data modelling.\n\nExperience in a startup or fast-paced R&D environment where architectural decisions move at product speed.\n\nAdditional Requirements\nThis is a fast-paced, high-impact environment - flexibility to occasionally work extended hours or weekends during critical periods is expected.\nThis is a full time, exempt position, based out of our Santa Clara, CA office.\nThe total compensation packaged will be determined by various factors such as your relevant job-related knowledge, skills, and experience.\nWe are redefining how satellites are designed, manufactured and used-so we’re looking for candidates with passion, deep knowledge and direct experience on LEO satellite component development, design and in-orbit activities. If that’s your experience - then we’ll be immediately wow-ed.\nE-Space is not currently able to provide employment sponsorship for candidates who do not hold work authorization for the location of this role. The Company is not currently able to provide employment sponsorship for candidates who do not hold work authorization for the location of this role.\nWhy E-Space is right for you\nAs a member of our team, you will play a crucial role in driving our success. Our team members have a strong sense of dedication and responsibility; this includes a strong commitment to our mission to create an entirely new suite of global capabilities to improve lives, business efficiencies and build a smarter planet. This means that there will be times when extra hours, including nights and weekends, may be needed to meet critical deadlines and mission goals. In return, we offer a dynamic work environment with opportunities for professional growth and development and the chance to make a meaningful impact in a high-growth industry.\nWe want you to make the most of your journey at E-Space. That’s why we support and invest in the physical, emotional and financial well-being of our team members and their families. Some of what you can expect when working at E-Space:\nAn opportunity to really make a difference\nSustainability at our core\nFair and honest workplace\nInnovative thinking is encouraged\nCompetitive salaries\nContinuous learning and development\nHealth and wellness care options\nFinancial solutions for the future\nOptional legal services (US only)\nPaid holidays\nPaid time off","description_format":"text","description_chars":7553,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Continuous learning"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Space & Aerospace","Satellite Manufacturing"],"lifecycle":[{"event":"open","at":"2026-09-17T02:24:18Z"},{"event":"reopen","at":"2026-10-14T07:11:13Z"}],"visa":[],"liveness":{"score":31,"band":"fade","label":"Fading","p_open":0.6,"p_active":0.581,"p_room":0.9,"age_days":34,"expected_fill_days":52,"reasons":["seen:34","stale_co","velocity","win:mid","comp:brand"],"computed_at":"2026-10-21T05:46:15Z"},"pay":{"stated_usd_annual":200000,"is_top_pay":true},"html_url":"https://alion.io/job/espace-real-estate-sim-management-5g-core-engineer","json_url":"https://alion.io/job/espace-real-estate-sim-management-5g-core-engineer.json","meta":{"generated_at":"2026-10-21T20:09:11Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":28690,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-22T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":2438005},"rest":"https://alion.io/mcp/rest/get_company?id=2438005"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fespace-real-estate-sim-management-5g-core-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fespace-real-estate-sim-management-5g-core-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fespace-real-estate-sim-management-5g-core-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/espace-real-estate-sim-management-5g-core-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fespace-real-estate-sim-management-5g-core-engineer"}]}