IMS Core Engineer

As an IMS Core Engineer, you'll be part of a specialist technical team responsible for testing, validating, and supporting mission critical communication solutions. This role is key to ensuring the performance, availability, and reliability of IMS Core services across Core, RAN, and Application layers. You'll work closely with test, support, and delivery teams to ensure systems meet customer expectations, contractual milestones, and service level agreements., * Provide technical expertise in IMS Core and MCX, supporting the definition and execution of test strategies for all network elements and software releases.

• Define and execute Functional, Performance, Accessibility, and Compatibility testing to agreed project timelines.
• Perform end-to-end testing, deep dive analysis, and root cause investigation across LTE and TETRA networks.
• Execute software upgrades, regression testing, and lifecycle testing on VNF-based Core nodes deployed on VMware architecture.
• Track test progress, manage defects, and maintain detailed test execution reports and performance logs.
• Support integration and client testing environments, providing technical analysis, logs, and feedback to internal teams and third parties.

• Strong background in IMS Core technologies, particularly IMS Voice, Video, and Data services.
• Hands-on experience with IMS and VoLTE architecture, interfaces, and protocols.
• Proficiency with LTE testing and analysis tools including Wireshark, SIP/RTP/RTCP/Diameter tracing, IXIA, Viavi, Spirent, XCAL, QXDM, Jira, Logcat, and Putty.
• Experience with VNF architecture deployments and software lifecycle testing on VMware platforms.
• In-depth knowledge of 3GPP specifications and Mission Critical features.
• Excellent analytical, troubleshooting, and communication skills.
• Degree in Computer Science, Electronics, Telecommunications, or equivalent professional experience.
• Flexibility to support on-call working and travel to customer locations as required.

• Generous holiday entitlement, plus additional birthday leave and bank holidays.
• Staff sales discount, Reward Plus shopping discount, and volunteering days.
• Government pension auto-enrolment and pension contribution from 12 weeks.
• Subsidized staff restaurant, onsite parking, and free shuttle bus service (from Weybridge & Woking Station)