Solution Architect - IMS

Ericsson; Kolkata District; On-site; INR 4,000,000 - 7,000,000; Full time

Job summary

Ericsson seeks a Solution Architect to design scalable IMS solutions, aligning multi-vendor environments with customer needs from blueprint to acceptance. You will drive end-to-end design across CSCF, SBC, DNS/ENUM and EPC/5GC, shaping test strategies and security controls.

With 9–15 years in telecom/IMS, you will guide cloud-native journeys, NFV patterns, and automation while collaborating across Cloud, PACO, Transport, and Security teams.

Qualifications

• 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.

Responsibilities

• 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.

Skills

IMS architecture

SIP/DIAMETER

IMS nodes (CSCF/TAS/SBC)

Linux fundamentals

test strategies

Wireshark

Cloud/Kubernetes/CI/CD

Scripting (Python/Shell)

communication skills

Education

BE/B.Tech/MCA or equivalent

Tools

Wireshark

Kubernetes

OpenStack

CI/CD tools

Job description

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.

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.