# Greg Rybinski

> Software Engineer ​>Telecom, Data Plane, Security, Zero Trust, SSL, NFV, Cloud, SDN, OpenFlow, L3, L2, QoS, Firewall, NPU, Embedded, Distributed, C/C++

Location: San Jose, California, United States
Profile: https://flows.cv/gregrybinski

Experienced software engineer with proven records of success in architecture design and software development in telecommunication field, specializing in data plane, L3 / L2 protocols, networking features, SDN, QoS, security, zero trust, firewall services not only for specialized multi-core NPUs, Asic's but also for virtualized cloud environments (NFV x86). 
Effective on multiple layers ranging from forwarding data plane, through adaptation and hardware middleware abstractions up to higher control plane layers in multiprocessor and multi-threaded designs.

My contact information: grybinski@gmail.com

- Cloud security - data path, zero trust, SSL;
- Cloud - Network Function Virtualization;
- SDN OpenFlow based, traditional networking, Evolved Packet Core;
- Network protocols: L3 (ipv4, ipv6, OSPF, Multicast), L2 (bridging, STP), Link Aggregation, SDN OpenFlow, Firewall features, QoS (WRED, queuing, marking), IPFIX, Control Plane;
- Forwarding data plane, NPU, EZchip NP4, custom Asic's, x86, distributed, embedded, real time, multi processor, multi threaded, linux, C/C++;
- Technical lead, leadership, define, architect, design, develop, enhance;

## Work Experience
### Staff Software Engineer @ Zscaler
Jan 2021 – Present | San Jose, California, United States
- Enhanced secured data path in critical scheduler and flow control areas.
- Lead design and implementation awarded with patent Systems and Methods for Reducing Server Load with HTTPS Cache, a novel solution that uses caching to intercept HTTPS web probes and generate synthetic HTTP responses with collected statistics, and simulate SSL handshakes to estimate costs, which significantly reduced server load and improved user experience monitoring;

### Staff Software Engineer @ Juniper Networks
Jan 2018 – Jan 2021 | Sunnyvale, CA
PFE Firewall. Software design and development:
- Design and development PFE firewall filter features for new Junos OS Evolved Platforms

### Tech Leader - Software Engineer @ Ericsson
Jan 2013 – Jan 2018 | San Francisco Bay Area
Network Function Virtualization (NFV) - Forwarding Data Plane Group. Software design
and development:
- NFV - Designed/prototype L3 fabric feature for data plane VMs / Containers (Kubernetes).
- NFV - Optimized for performance forwarding plane VMs for Evolved Packet Core (x86).
- NFV - Designed and developed forwarding plane features: infrastructure, L3 features, QoS TM (DPDK x86).

Next Gen Forwarding Plane Group - SSR Router 8001. Software design and development:
- Technical leader - architecture designed and developed IP Flow Information Export (IPFIX)
forwarding plane based on custom NPU (Spider).
- Designed and developed SDN OpenFlow for forwarding plane based on EZchip NP4 NPU.

### Tech Leader - Software Engineer @ Ericsson
Jan 2008 – Jan 2013 | Greater Boston Area, MA
- Line Card Technical Lead of QoS features design and development based on Ezchip NP4 NPU including: programmable marking, congestion avoidance (WRED), queuing policy, scheduling and advanced per packet control.

### Principal Software Engineer @ Amperion
Jan 2005 – Jan 2008 | Greater Boston Area, MA
- Responsible for end-to-end QoS architecture of voice and video support for WiFi and BPL (Broadband over Power Lines - DS2 Hw) networks, based IXP4xx platform (linux). 
- Patented algorithm for switching between WiFi and BPL links.

### Senior Software Engineer @ 3Com
Jan 2000 – Jan 2005 | Greater Boston Area, MA
- Major architecture design contribution for adding L3 RIP, OSPF, Multicasts (PIM, DVMRP)
functionality based on Phase2 (3rd party) software to 3Com LAN Core switches requiring in
depth knowledge of custom 3Com ASIC forwarding design together with router’s
functionality.
- Designed and implemented middleware for adding routes with handling L3 Access Control
List into 3Com ASIC’s forwarding engine.
- Developed 3Com IP Telephony platform based on 3Com proprietary VoIP- SIP protocol
(vxWorks) including: significant optimization time sensitive audio processing path of voice
packets from network driver up to DSP application.
- Technical lead Link Aggregation and “Dynamic Bridge Ports” project of 3 software engineers
across entire 3Com L2 / L3 product line switches.


## Education
### Master’s Degree in Information Systems
Gdańsk University of Technology


## Contact & Social
- LinkedIn: https://linkedin.com/in/greg-rybinski

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Source: https://flows.cv/gregrybinski
JSON Resume: https://flows.cv/gregrybinski/resume.json
Last updated: 2026-04-12