Senior Design Specialist - Wireless Voice Core & IMS

LifeWorks, Inc.$100K — $150K *
Telecommunications & Hardware
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • 10+ years of experience in 3G/4G/5G Voice Core systems
  • Expertise in IMS architecture and call session control functions
  • Strong knowledge of SIP, Diameter, and other signaling protocols
  • Familiar with 3GPP and RFC standards
  • Hands-on experience with IMS vendors like Ericsson and Nokia
  • Proficient in containerization technologies and orchestration
  • Bachelor's degree in Computer Science or related STEM field

Responsibilities

  • Lead design and development of IMS and Wireless Voice Core systems
  • Support voice services including VoLTE and interconnect
  • Deploy scalable IMS systems focused on performance
  • Create CI/CD pipelines for automation
  • Analyze and optimize network performance
  • Document configurations and troubleshooting procedures
  • Coordinate with cross-functional teams for integrated solutions
  • Manage vendor relationships and influence solution strategies

Benefits

  • Comprehensive total rewards package with competitive salary and bonuses
  • Minimum 3 weeks of vacation time
  • Flexible work arrangements (in-office, remote, or hybrid)
  • Company matched pension and share purchase programs
  • Opportunities for community engagement and volunteerism
  • Career growth and learning development opportunities
  • Additional benefits tailored to individual needs
Full Job Description
What you'll do

  • Lead architecture, design, and development of IMS and Wireless Voice Core systems (P/I/S-CSCF, SBC, TAS, ENUM, MRF/BGF)
  • Design and support voice services including VoLTE, VoWiFi, emergency services, roaming, and interconnect
  • Deploy and maintain scalable, carrier-grade IMS systems optimized for performance and cost-effectiveness
  • Create CI/CD pipelines to automate testing and deployment
  • Analyze network performance and optimize architecture; resolve complex technical issues
  • Develop Methods of Procedure (MoP) documentation for configurations and troubleshooting
  • Lead testing, validation, and capacity planning across deployments
  • Collaborate with RAN, Packet Core, Policy, Infrastructure, and Database teams on integrated solutions
  • Manage vendor relationships and influence solution roadmaps
  • Work with Red Hat OpenStack, OpenShift, AWS, and containerized environments
  • Develop KPI dashboards and monitor performance metrics
  • Participate actively in Agile teams and roadmap discussions


What you bring

  • 10+ years in 3G/4G/5G Voice Core (architecture, design, implementation, operations)
  • Deep expertise in IMS architecture, interfaces (Gm, Cx, Dx, Sh, Rx, Rf, ISC, Mw), and call session control functions
  • Strong knowledge of signalling protocols: SIP, Diameter, H248, SS7, CAMEL, RTP/RTCP, GTP, and 5G protocols
  • 3GPP specifications and RFC standards expertise
  • Hands-on experience with multiple IMS vendors (Ericsson, Nokia); platform debugging and configuration
  • Strong understanding of Service-Based Architecture (SBA), LTE/5G Core, and subscriber data management (HSS/UDM)
  • Expertise in containerization (Docker, Kubernetes, OpenShift, AWS) and orchestration
  • Advanced troubleshooting with Netscout, Wireshark, and PCAP
  • TCP/IP networking fundamentals (TCP/UDP/IP/SCTP/Diameter)
  • CI/CD pipeline experience (GitLab, Agile methodologies)
  • Familiarity with data analytics tools (Splunk, BigQuery, Looker)
  • Bachelor's degree in Computer Science, IT, Electrical Engineering, or related STEM field


Great-to-haves

  • Public Cloud Native Services (AWS, GCP) experience
  • Programming skills in Python, Ansible, or API development
  • Linux Shell scripting
  • Radio, Transport, Signaling, or Infrastructure product experience


Location: Any major Canadian city

#Remote

Salary Range: $100,000-$150,000

Performance Bonus or Sales Incentive Plan: 15%

Actual total compensation will be determined based on factors such as knowledge, skills, performance and experience. We encourage all qualified candidates to apply, even if the posted salary range doesn't match your expectations. We're open to discussing competitive compensation packages tailored to your experience level and expertise. TELUS offers rewarding benefits, which may vary per job function, such as:
  • Comprehensive total rewards package highlighting competitive salary and bonus structures, minimum 3 weeks of vacation, and flexible benefits plan to meet the needs of you and your family
  • Flexibility to work in-office, virtually or a combination of both, based on the role's requirements
  • Generous company matched pension and share purchase programs
  • Opportunity to give back to communities in which we work, live and serve
  • Career growth and learning & development opportunities to develop your skills
  • And much more ...


Job Type: This is for a current vacancy

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