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Poornima MPM
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Poornima M

@poornimam1

Senior Software Engineer at Cambium Networks who scaled eBPF flow accounting to 4M conntrack entries and doubled datapath throughput.

India
Message

At Cambium Networks, I re-architected application flow accounting with eBPF, raising capacity from a 17K-connection ceiling to as many as 4M conntrack entries, depending on the platform. I also unified firewall, NAT, traffic-shaping, WAN, and VPN components on nftables and kernel flowtable acceleration, improving CPU-limited throughput from about 6 Gbps to 12+ Gbps.

I built end-to-end WireGuard support for Remote Access and Overlay WAN, and implemented StrongSwan-based IPsec site-to-site VPN features. I also designed zero-touch LLDP PBA/Auto-VLAN between NSE and Cambium APs and developed eBPF-based per-device traffic analytics.

Earlier, at Everest Networks Inc., I developed WLAN Access Controller and Access Point software, along with a high-volume statistics and event pipeline for centralized AP monitoring. My work spans embedded Linux, networking, and security gateways, and includes three listed patents in WiFi device zoning, multicast-DNS support, and service discovery.

Experience

Work history, roles, and key accomplishments

TI

Senior Software Engineer

Tech Mahindra / Infoblox

Oct 2020 - Jun 2023 (2 years 8 months)

Developed a module for applying device/server licenses from the Infoblox support web application and enhanced device-cloud data sync for configuration and utilization data.

EI

Tech Lead

Everest Networks Inc.

Jun 2015 - Oct 2020 (5 years 4 months)

Developed WLAN Access Controller and Access Point software, including YANG-based configuration models and a high-volume statistics pipeline using Protobuf, Python, ZeroMQ, and Redis.

AVAYA logoAV

Project Engineer

Nov 2010 - Jun 2015 (4 years 7 months)

Designed WLAN controller features including mDNS gateway/data-plane changes, cluster status/statistics, and configuration synchronization across controllers, switches, and APs.

WIPRO logoWI

Project Engineer

Feb 2008 - Nov 2010 (2 years 9 months)

Developed and maintained C-based HP Printer/system-management software, resolved critical production defects, and received Outstanding Performer recognition.

Education

Degrees, certifications, and relevant coursework

University Visvesvaraya College of Engineering logoUE

University Visvesvaraya College of Engineering

Bachelor of Engineering, Computer Science

Bachelor of Engineering in Computer Science from University Visvesvaraya College of Engineering, Bengaluru, completed in 2007.

Tech stack

Software and tools used professionally

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