IMS Core Engineer

IMS Core Engineer

Company

OXIO

Conditions

6 days agoHead Anywhere Remote Full Time Engineering Jobs by OXIO

OXIO OXIO is a Telecom-as-a-Service (TaaS) platform that enables companies to launch and manage their own mobile networks (MVNOs) using a cloud-native, API-first platform. It serves retailers, fintechs, device/IoT companies, celebrities/lifestyle brands, MVNOs, and network operators looking to embed or launch connectivity products without needing telecom expertise. New York, USA Funding Series B ($40T) Series A ($12T) Investors ParaFi Capital Daedalus Multicoin Capital Abstract Ventures Coinbase Ventures Projects Oxio BrandIQ Customer Engagement Platform BrandVNO® Mobile Phone About OXIO Founded in 2018, OXIO is described as the world's first Telecom-as-a-Service platform, offering a programmable, cloud-based, global one-network solution for the telecom ecosystem. Its core products include BrandVNO® (a no-code portal for building and managing custom mobile plans and MVNOs), BrandIQ (business intelligence and subscriber insights derived from first-party network data), and the OXIO Network (an autonomous, multi-carrier, cloud-based core network that blends carriers to eliminate roaming). OXIO serves a range of industries including retail, connected devices/IoT, lifestyle/celebrity brands, MVNOs, fintech, and wholesale network operators, with case studies including Circle K, Billpocket, and unnamed fintech and retail clients in Mexico. The company is led by CEO and co-founder Nicolas Girard, with a leadership team drawn from companies like Verizon, Google Fi, AT&T, and Uber, and is backed by investors including Ascend, Atlantico, Collab Capital, Monashees, Fintech.io, ParaFi, Unshackled VC, and DCG. OXIO has offices in New York City, Mexico City, and Montreal. View jobs by OXIO

Skills

3gpp Ansi Bash Bicc Csfb Cudb Diameter Documentation Fault Diagnostics H248 H323 Hss I-Cscf Ims Incident Management Ir.21 Ireg Testing Isup Itu-T Linux Mgcf Mme Mtas Network Troubleshooting P-Cscf Pgw Python Roaming Configuration S-Cscf Security Audit Sgw Sip Ss7 Unix Volte Vowifi Wireshark

About the Role

You will join the mobile core team and take ownership of our IMS mobile platform. You'll manage networks and nodes across our 2.5G, 3G, and 4G environments, working with SIP, H323, IMS/IMT, VoLTE, and VoWiFi technologies. You'll use dashboards, building new ones where needed, to quickly spot issues and patterns. When incidents arise, you'll follow established communication procedures both internally and with third-party providers. You'll handle maintenance, troubleshooting, security audits, and emergency response, undertaking fault handling and corrective actions at the node, service, and infrastructure level. You'll take part in project work, implementing and adapting new IMS end-to-end service functionalities, nodes, and services. From time to time, you'll cover 7x24 monitoring shifts, including on-call support and baby-sitting activities. You'll use Wireshark tracing on critical infrastructure to debug issues, provide input on process improvements, and verify and implement configuration changes.

Requirements

• At least 10 years' experience in the core network domain with mobile networks
• BSc degree in Telecommunication or Computer Science (post-graduate studies are a bonus) and 10+ years core telecommunications network experience
• Working knowledge of telecom networks like 2G, 2.5G, 3G and LTE (MME, SGW, PGW, and MME)
• Conceptual understanding of IMS evolution and trends - IMS Subsystems, functionalities and IMS services call flows
• Knowledge of IMS network topology, Core IMS Parameters and Features
• Experience with different types of Core Nodes, CSFB, IMS (P-CSCF, I-CSCF, S-CSCF, MTAS, HSS, CUDB, MGCF, etc.)
• Experience with SS7, ISUP, BICC, SIP, H248, Diameter signaling & protocols configuration change for IMS based services
• Experience with operation and maintenance of IMS platforms for alarms, faults/abnormal conditions handling, trace analysis, troubleshooting, system backup/restore, fault diagnostics, preventive maintenance & upgrades
• Experience with configuration preparation & implementation for IMS nodes and integration for all nodes (S-CSCF, I-CSCF, MTAS, HSS, CUDB, etc.)
• Hands on experience with sniffers, Wireshark and testing tools in advanced mode
• Hands on experience with Linux/Unix based systems
• Understanding of 3GPP, ITU-T and ANSI standards
• Understanding of roaming agreements and IR.21, including IREG testing
• Experience with VoLTE troubleshooting and call trace analysis
• Strong writing and documentation skills
• Fluent in English (written and spoken)
• Willingness to work on morning/afternoon shifts
• 2+ years scripting experience (Python, Bash, etc.) - nice to have

Responsibilities

• Manage networks and nodes within the IMS domain for 2.5G, 3G & 4G networks (SIP, H323, IMS/IMT, VoLTE, VoWiFi)
• Build and use dashboards to discover issues and patterns
• Follow communication procedures when handling incidents internally and with third-party providers
• Perform maintenance, troubleshooting, security audits, and emergency response
• Undertake fault handling and corrective actions on node, service and infrastructure level
• Handle project activities implementing and adapting new IMS E2E service functionalities, nodes, and services
• Cover 7x24 monitoring shift responsibilities including on-call support and baby-sitting activities
• Perform Wireshark tracing of critical infrastructure to debug issues
• Provide input, implement and verify improvements in processes and work instructions
• Verify and implement configuration changes
• Identify and drive improvements

Показать контакты