Robin Singh

ROBIN SINGH RANIYAL

5G Core / Cloud-Native QA Tech Lead | LTE-CUPS | Protocol Test & Validation

Toronto, ON (GTA), Canada • Canadian PR — No Sponsorship Required • Open to relocation: Vancouver, Montreal, Calgary

+1 365-987-5014 • raniyalrobinsingh@gmail.com • linkedin.com/in/robinraniyal

PROFESSIONAL SUMMARY

Senior QA Tech Lead with 13+ years across LTE, LTE-CUPS, 5G Core, DOCSIS broadband, and cloud-native telecom platforms, with deep protocol expertise spanning AMF/SMF/UPF/PGW-C/SGW-C and the full control-plane signaling stack (N2/NGAP, N4/PFCP, Gx/Gy/Gz, S1AP, Diameter, HTTP/2 SBI). Proven front-ending Tier-1 operators (Rakuten, Orange, AT&T, Verizon), leading RCA, mentoring QA teams, and driving release sign-off across Keysight Nemo Cloud, Nemo Analyze, and Nemo Server validation.

Former Technical Interview

Panelist for 5G Core and cloud-native microservices roles.

CORE SKILLS

5G Core / EPC Nodes: AMF, SMF, UPF, PGW-C, SGW-C, vMME, PCRF, PCF, OCS, OFCS, AUSF, UDM, CHF

Interfaces & Protocols: N2/N4 (PFCP), Sxa/Sxb, S1, S11, S6a, Gx/Gy/Gz, S5, NGAP, S1AP, Diameter, RADIUS, GTP, SIP/VoIP, SCTP, HTTP/2 SBI

5GC Charging / SBI: Nchf Converged Charging (CCR/CCA), REST-based SBI validation via curl and Postman

Cloud-Native & Observability: Kubernetes, Docker, Helm, AWS, Azure, OpenStack, Grafana, Prometheus

Test & RF Tools: Wireshark, tcpdump, Nemo Suite, IXIA, Incognito IPAM, Postman, Jira, TestRail

Automation (supporting): Python, Robot Framework, PyATS, Jenkins/Bitbucket CI/CD

PROFESSIONAL EXPERIENCE

QA Automation Tech Lead — Tech Mahindra, Toronto, Canada Jul 2020 – Present

Client: Keysight Technologies — QA Automation Lead (Jul 2025 – Present)

• Owned QA release planning: test strategy, scope definition, regression planning, and sign-off for major releases.
• Executed hands-on 5G NR/LTE signaling protocol test scenarios on the Keysight Protocol R&D Toolset (PRT) during an onsite engagement in San Diego, CA, validating chipset/device interaction against simulated network signaling.
• Designed a VoIP server integrated with Airtel SIP trunk for real operator signaling validation, and led Nemo Analyze RF KPI benchmarking and Nemo Cloud performance testing for large-scale data ingestion.

Client: Microsoft (Affirmed Networks) — QA Automation Tech Lead, Cloud-Native 5G Core

• Led testing of cloud-native MME/AMF (mobility, registration/attach) and SMF/UPF (session management, user-plane forwarding) on Kubernetes/Azure; validated NGAP and HTTP/2 SBI interfaces.
• Monitored cloud-native NF health via Grafana/Prometheus and performed protocol-level validation (TCP/IP, UDP, ICMP) with Wireshark/tcpdump.
• Served as Technical Interview Panelist, evaluating candidates for 5G Core and cloud-native telecom automation roles.

Client: Cisco Systems — LTE-CUPS, 5G Core & BEMS

• QA Lead for LTE-CUPS and 5GC nodes (PGW-C, SGW-C, PCRF, PCF, OCS, OFCS); validated LTE-CUPS charging (Gy/Gz online/offline) alongside 5G Core charging integration across SMF, UPF, and CHF.
• Progressed into a customer-facing BEMS Engineer role owning end-to-end PGW-C charging and QoS validation; served as SPOC for Rakuten, Orange, AT&T, and Verizon, performing RCA and mentoring the QA team.
• Extended coverage to Cisco CPAR AAA (Diameter, RADIUS) and Cisco Ultra Cloud Core 5G, validating REST-based SBI calls and Nchf Converged Charging (CCR/CCA) flows.

QA Automation Test Specialist / Network Automation Tech Lead — Tata Elxsi Feb 2016 – Jul 2020

• DOCSIS lab validation (OFDM/QAM, SIP, Wi-Fi) and Avaya SDN ONA (VLAN, OpenFlow) testing; integrated IXIA traffic generation for TCP/UDP/ICMP/FTP flows.
• Onsite deployments for Vodafone Germany, Claro Mexico, and Claro Colombia, delivering Wi-Fi cable modem validation, KPI optimization, and customer-facing troubleshooting.

Senior Software Engineer, vEPC — Tech Mahindra Feb 2015 – Feb 2016

• Deployed and validated OpenStack-based vEPC (MME, SGW, PGW) LTE mobility scenarios and protocol flows.

R&D Software Engineer, ASR5k/5500 — Cisco Systems Jul 2011 – Dec 2014

• Validated LTE MME mobility scenarios (handover, paging, multi-APN, S6a/GTP/S1AP) and led log-parsing RCA for call-flow failures.

EDUCATION & CERTIFICATIONS

M.Tech – Software Systems, BITS Pilani (2015)

B.Tech – Computer Science, Punjab Technical University (2010)

AWS Cloud Practitioner • Scrum Master I • Generative AI (Google)

AWARDS & LANGUAGES

Awards: Cisco Star Award (Twice) • Tech Mahindra Bravo Award • Tech Mahindra Pat on the Back (Twice)

Languages: English • Hindi • Punjabi

Tech Lead, QA Automation at Tech Mahindra (2020-05 – Present)

Managing a 6-member QA/test team as Tech Lead, directing lab build-out priorities and automation suite ownership.

• Built out a Private 5G lab integrating Nemo Handy/Outdoor/Analyze with the Keysight UXM 5G test tool.
• Extended Python/Robot Framework/Eggplant automation for Nemo Analyze/Cloud/Server; mentored the team on the suite.
• Coordinated with development team each release cycle, driving Jira feature IDs to closure ahead of QA deadlines.
• Completed an onsite RF conformance testing engagement at Qualcomm (San Diego, Jun–Jul 2026), executing ALF conformance test cases.

Private 5G Lab & RF Test at Keysight Technologies (2025-05 – Present)

Client engagement under Tech Mahindra.

QA Engineer - LTE-CUPS, 5G Core & CPAR AAA at Cisco Systems (2020-07 – 2025-04)

• Validated offline/online charging call flows via Gx/Gy/Gz interfaces on Cisco Ultra Packet Core (PGW-C/SGW-C), including CDR-adjacent charging behaviour.
• Cisco CPAR AAA Server: configured, validated, and reproduced customer-reported RADIUS/Diameter AAA issues; led a 4-member team.
• Cisco ASR5k/5500 MME (3 yrs): built Python-based test scripts across attach/authentication, bearer setup, TAU, handover, paging, and multi-APN scenarios — direct experience with device attach-process testing.

QA Engineer - Cloud-Native 5G Core at Microsoft / Affirmed Networks (2024-01 – 2024-08)

• CNF testing on Kubernetes — pod-level operations and rolling updates via manifest edits.
• Validated NGAP and SBA/REST-SBI interfaces; exercised REST calls via curl and Postman.

QA / Test Engineer at Tata Elxsi (2016-02 – 2020-07)

Broadband & SDN Automation

• Avaya SDN ONA project: built the backend Linux/Python automation component of a hybrid OpenFlow-based IoT/edge automation framework.
• Broadband gateway / DOCSIS / Wi-Fi / RDK-B validation (2017–2020).
• 6-month deputation to Sanctum Networks: installed OpenStack from scratch on bare metal (Neutron/Nova across controller and compute nodes).

B.E./B.Tech in Computer Science