The IMS/VoLTE Integration Engineer will analyze, prepare, implement and verify the configuration and integration of a node, network and/or system. Your scope of work could include the scenarios of introduction, upgrade expansion, functionality and capacity. Your work will in part form our customer legacy.
Key responsibilities :As part of the mobile core team, you will take care of our IMS mobile platform; you will have the following responsibilities:
Manage networks and nodes within the IMS domain for our 2.5G, 3G & 4G networks (SIP, H323, IMS/IMT, VoLTE, VoWiFi)
Using dashboards (and building new ones) to clearly and quickly discover issues and patterns
Accountable and responsible to follow the communications procedures in place when handling an incident. Communication is both internal within our company and external to our third-party providers.
Maintenance, troubleshooting, security audits, and emergency response
Undertake fault handling and corrective actions on node, service and infrastructure level
Handle project activities, implementing / adapting (new) IMS E2E service functionalities, nodes, services
When needed, cover the 7x24 monitoring shift responsibilities (On call support, Baby Sitting activities etc.)
Wireshark tracing of critical infrastructure to debug issues
Provide input, implement and verify improvements in processes and work instructions ·
Verify and implement configuration changes
Work to identify and drive improvement
At least 10 years’ experience in the core network domain with a mobile networks
Holding a 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).
Great Conceptual understanding of IMS evolution and trends - IMS Subsystems, functionalities and IMS services call flows.
Great knowledge of IMS network topology (their various interfaces), Core IMS Parameters and Features.
Worked on different type 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 IMS based services is necessary.
Operation and maintenance of IMS platforms for Alarms, faults/abnormal conditions handling, Analysis of traces, High troubleshooting skills, system backup/restore from backup files, Fault Diagnostics, Preventive Maintenance & upgrades of IMS nodes.
Configuration preparation & implementation for configuration changes requests for IMS nodes and Integration for all nodes (S-CSCF, I-CSCF, MTAS, HSS, CUDB, etc.) as well.
Hands on with sniffers, Wireshark and testing tools in advanced mode.
Hands on with Linux/Unix based systems (you can find your way around a linux shell).
Understanding of 3GPP, ITU-T and ANSI standards.
Understanding of roaming agreements and IR.21, including IREG testing.
VoLTE Troubleshooting and call trace analysis.
Strong writing and documentation skills are needed to develop reports.
Adaptability and responding to change.
Be able to work under pressure.
You are fluent in English (written and spoken).
Ready to work on morning/afternoon shifts.
Good interaction with external customers and internal teams.
2+ years scripting experience (Python, Bash, etc.)
OXIO is committed to fostering a diverse, equitable, and inclusive workplace where all employees feel valued and empowered. We believe that diversity in all its forms drives innovation and creativity, and we strive to create an environment that reflects and celebrates the unique backgrounds, perspectives, and talents of our employees. We do not discriminate against any employee or applicant for employment based on race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), national origin, age, disability, genetic information, veteran status, or any other characteristic protected by applicable federal, state, or local law. We are dedicated to providing a work environment free from discrimination and harassment. We committed to ensuring that all qualified applicants have an equal opportunity to apply for job openings. If you need assistance or an accommodation due to a disability, please contact us at [email protected] for more information.
Skills Required
- BSc in Telecommunication or Computer Science (post-graduate studies a bonus) with 10+ years core telecom network experience
- Working knowledge of 2G/2.5G/3G/LTE mobile networks and core elements (MME, SGW, PGW)
- Deep conceptual understanding of IMS subsystems, services, call flows and evolution
- Strong knowledge of IMS network topology, interfaces, core IMS parameters and features
- Hands-on experience with IMS core nodes (P-CSCF, I-CSCF, S-CSCF, MTAS, HSS, CUDB, MGCF, etc.)
- Experience with signaling protocols: SS7, ISUP, BICC, SIP, H.248, Diameter
- Operation and maintenance of IMS platforms: alarms, fault handling, trace analysis, backups and upgrades
- Configuration preparation and implementation for IMS node changes and integrations
- Advanced use of packet sniffers and Wireshark for trace and call analysis
- Hands-on with Linux/Unix systems and shell usage
- Understanding of 3GPP, ITU-T and ANSI standards
- Understanding of roaming agreements, IR.21 and IREG testing
- VoLTE troubleshooting and call trace analysis experience
- Strong technical writing and documentation skills
- Ability to work under pressure, adapt to change and perform shift/on-call duties (7x24 monitoring)
- Good interaction and communication with external customers and internal teams; fluent English
- 2+ years scripting experience (Python, Bash, etc.)
What We Do
OXIO is the first telecom-as-a-service (TAAS) platform for brands and enterprises that unbundles mobile telecom infrastructure, capturing the powerful data and true value that it emits. OXIO’s 100 percent cloud-based solution blends the wireless infrastructure of many providers, enabling something that wasn't possible before — a custom-purposed, asset-light network delivered to each brand in a matter of days. OXIO's B2B SaaS solution unlocks the full and uncompromising control of the wireless experience for brands, including actionable intelligence that drives clear value and results. Mobile data, long locked up in telecom silos, allows brands to get closer to their customers than ever. OXIO is headquartered in New York, with offices in Mexico City and Montreal, Canada. For more information, visit oxio.com.
