Solution Architect - IMS

## Join our Team About this opportunity: Join our dynamic team at Ericsson as a Solution Architect. In this pivotal role of Design IMS solutions that scale, interoperate, and perform. You will turn customer needs into robust architectures, lead end-to-end design across multi-vendor environments, and guide delivery teams from blueprint to acceptance. The goal is simple, resilient IMS, ready for VoLTE, VoWiFi, and cloud-native evolution. What you will do: • Own the IMS solution architecture, align HLD and LLD with customer requirements, standards, and Ericsson best practices. • Define reference architectures for CSCF, SBC, TAS, DNS/ENUM, and related domains, including integration with EPC/5GC. • Lead discovery and translate business and technical needs into clear design decisions, risks, and trade-offs. • Produce and review design deliverables, HLD/LLD, capacity and scaling models, security controls, data flows, and call flows. • Set integration strategy and guardrails, support MOP definition for live activities, and ensure design compliance during rollout. • Define test strategies for SIT, IOT, and UAT, align acceptance criteria with KPIs and SLAs, and sign off on readiness. • Guide troubleshooting on complex issues, drive root cause analysis, and steer corrective actions with L2/L3 teams. • Optimize architecture for performance, resilience, and cost. Lead parameter tuning guidance and capacity planning. • Shape the cloud journey with NFV and cloud-native patterns on Kubernetes, and promote automation across on-prem and hybrid clouds. • Partner across domains, Cloud, PACO, Transport, Security, and customer stakeholders. Run technical workshops and design reviews. • Maintain architecture standards, reusable patterns, and knowledge assets for repeatable delivery. The skills you bring: • Deep understanding of IMS architecture and 3GPP standards, with practical design authority in multi-vendor environments. • Strong grasp of SIP, SDP, DIAMETER, and call flows for VoLTE and VoWiFi, with interworking to EPC/5GC. • Hands-on credibility with IMS nodes, CSCF, TAS, SBC, DNS/ENUM, plus policy and charging touchpoints. • Proficiency in Linux fundamentals, networking, routing, DNS, TLS, and security principles for IMS. • Experience defining test strategies and acceptance for carrier-grade services and KPIs. • Comfort with logs and traces, and tools like Wireshark, to validate design and isolate defects. • Cloud and virtualization know-how, NFV, containers, Kubernetes, CI/CD, and exposure to cloud-native IMS. • Scripting for automation advantage, Python or Shell, to support design validation and tooling. • Clear communicator who can lead technical discussions, simplify complexity, and influence decisions. The skills you bring: • BE/B.Tech/MCA or equivalent. • 9 to 15 years in telecom core or IMS, with at least 5+ years in solution or architecture roles. • Proven track record delivering IMS, VoLTE or VoWiFi, from design to acceptance in live networks. • Certifications are a plus, IMS or VoLTE, Linux, cloud, Kubernetes, OpenStack.