Principal Engineer

About this opportunity
Principal technical leader for the system architecture and routing-protocol design of Ericsson's IPOS network operating system on the Router 6000 platform.
Own the design of the control-plane and routing subsystems end to end, and shape the platform infrastructure and security foundations that IPOS is built on turning architectural intent into robust, scalable, competitive implementation.
This is a senior individual-contributor role: you set technical direction for a major subsystem, guide developers, and are accountable for the architectural quality of what ships.
What you will do
Key Responsibilities:
System Architecture & Routing Protocols:

• Own the architecture and design of IPOS routing and control-plane subsystems IS-IS, BGP, OSPF, MPLS/LDP/RSVP-TE, Segment Routing (SR-MPLS, SRv6), EVPN, and multicast• Define subsystem decomposition, module interfaces, state management, and scaling models (FIB/RIB scale, convergence, high availability, ISSU)• Translate portfolio and segment requirements into concrete protocol feature designs and roadmaps• Drive design for correctness, convergence performance, and route scale across the target segments (mobile backhaul, aggregation, metro/edge, converged IP, DC/DCI)• Shape the platform foundations the routing stack depends on: control-plane infrastructure, inter-process messaging, data-plane/forwarding abstraction, telemetry, and hardware/silicon abstraction• Contribute to build-vs-reuse decisions across merchant silicon and platform components• Ensure the architecture supports cloud-native, containerized, and disaggregated deployment models (vCSR, cloud RAN, CNIS)
  Security• Embed security-by-design into the routing and control-plane architecture: control-plane protection, secure protocols (IPsec, MACsec, key management), secure boot / trust chain, and hardening against protocol-level attacks• Partner with security specialists to meet product security requirements and evolving standards (incl. post-quantum readiness direction)
  Quality, Verification & Delivery• Define architecture-level acceptance criteria and drive them through design reviews, verification strategy, and performance benchmarking• Own resolution of complex cross-subsystem technical issues and act as a senior escalation point within the routing/infrastructure domain• Champion engineering excellence design documentation, code quality, and testability• Mentor senior and principal developers; grow protocol and system-design competence within the Bangalore team• Represent the routing/infrastructure domain in cross-site architecture forums (Bangalore, Beijing, Sweden)• Support customer engagements, RFI/RFP responses, bake-offs, and technical win strategies where routing/infra/security depth is decisive

You will bring
Required Competencies• Deep, hands-on expertise in IP routing protocols IS-IS, BGP, MPLS, Segment Routing (SR-MPLS/SRv6), EVPN; multicast a strong plus• Proven track record designing subsystems within a large-scale embedded network OS (IPOS, IOS-XR, SROS, JUNOS, or a disaggregated NOS such as SONiC)• Strong system-design fundamentals: distributed state, scalability, high availability, convergence, ISSU• Working knowledge of platform infrastructure forwarding/data-plane abstraction, silicon abstraction, telemetry, control-plane infrastructure• Solid grounding in network security: control-plane protection, IPsec/MACsec, secure boot, protocol hardening• Ability to translate product/segment requirements into architecture and lead it through to delivery• 10+ years in networking software development, with 3+ years in system design / architecture of routing or platform subsystems• Excellent technical communication and cross-geography collaboration
Nice to Have• Experience with cloud-native / containerized NOS and disaggregated architectures• Exposure to AI-native / on-node telemetry-driven operations• Contributions to relevant standards bodies (IETF) or open-source networking projects• Familiarity with the mobile transport domain (packet fronthaul, timing/sync, cell-site routing)
Why This Role Is Critical
Routing and control-plane design is the technical core of the IPOS value proposition and the foundation for the extended multi-segment strategy.
This Principal role anchors that expertise in the Bangalore Router 6000 team, ensuring the routing, infrastructure, and security architecture scales to new segments while remaining robust, secure, and competitive.
It works directly alongside the Transport SW Architecture Expert (JS8) and provides the deep subsystem leadership that turns architectural direction into shipped capability.
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"All academic credentials must be from recognized and accredited institutions and are further subject to verification."
Why join Ericsson?At Ericsson, you'll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what's possible. To build solutions never seen before to some of the world's toughest problems. You'll be challenged, but you won't be alone. You'll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.
What happens once you apply? Click Here to find all you need to know about what our typical hiring process looks like.Encouraging a diverse and inclusive organization is core to our values at Ericsson, that's why we champion it in everything we do. We truly believe that by collaborating with people with different experiences we drive innovation, which is essential for our future growth. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team. Ericsson is proud to be an Equal Opportunity Employer. learn more.
Primary country and city: India (IN) || Bangalore
Req ID: 788308