# Avignan Chatterjee

> Tech Lead / Sr Manager - Cloud, Distributed Systems, Networking.

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/avignan

Areas of work:
@Nutanix: Leading and Team building, Networking, OVS, multi-tenant cloud networking. Scalable REST API to networking datapath.

@Zerostack: Private cloud, Cloud networking, Openstack, OVS, Hyper-converged infrastructure.

@Aruba: Wireless controllers, Ipv6, L3 Mobility, Protocols, Datapath,  Wireless Access points,
Filed multiple patents from Aruba (Awaiting review by USPTO)

@Cisco BFD hardware offlload on Excalibur series of line cards on Cisco 7600 Router.
Lawful intercept on Cisco 7600 platform.

@Wipro: Windriver embedded Linux.

## Work Experience
### Staff Engineer at Nutanix @ Nutanix
Jan 2018 – Present | San Jose, California, United States
Leading cross-geo teams for building cutting edge virtual networking and network security solutions: 
Work involves: Networking, OVS, OVN, multi-tenant virtual networking. Scalable REST API, Distributed control plane, Networking datapath, Network security. (Python, GoLang)
- Scalable REST API for Nutanix microsegmentation.
- Virtual NIC migration.
- Layer 2 isolation.
- Security policy hitlog.
- Evaluation of Nutanix network stack integration with Equinix.
- Enabling QoS and various other features on the virtual networking stack.
- Conceptualized and Lead multiple hackathon winning projects.
- Mentored intern groups to deliver multiple projects.
- Leading scrum teams.

### Software Engineer @ ZeroStack
Jan 2015 – Jan 2018 | Bangalore
From setting up the India office to delivering software solutions to customers.
Work involved: Private cloud, Cloud networking, Openstack, OVS, Hyper-converged infrastructure. (GoLang, Openstack)
- Enabled rolling upgrade from openstack liberty to Mitaka.
- System disk lifecycle management (REST API and control-plane for ceph and lvm disks).
- Enable DNSaaS on openstack.
- Enable jumbo frames.
- Optimize VNC access for the VM console. Enable https access for VNC access.
- Interfacing with customers for requirement gathering and presenting zerostack solutions.
- Debugging complete software stack involving ovs and linux based virtual networking, etcd, cassandra, redis.
- Setup India office. Starting from office location selection, Hardware procurement, Setting up VPN access, taking interviews and mentoring engineers.

### Staff Engineer @ Aruba Networks, an HP company
Jan 2015 – Jan 2015
More on networking protocol, datapath and innovation.
Wireless controllers, Ipv6, L3 Mobility, Protocols, Datapath, Wireless Access points,
- Enable Aruba Access Points to talk to Google cloud controllers over UDP tunnel.
- Enable AES GCM on hardware crypto engines for supported Access Points.
- Enable network insight by passive monitoring of DHCP and DNS.
- Filed multiple patents. (Patent Number: 9438557, 9866522)
- Deliver adaptive DHCP assignment (patented)
- Develop multiple features for IPv6 protocol.

### Member of Technical Staff @ Aruba Networks
Jan 2012 – Jan 2015

### Software Engineer @ Cisco
Jan 2008 – Jan 2012
Deliver networking protocol performance (software and hardware offloaded) on Cisco service provider routers:
- BFD hardware offload on Excalibur series line cards on Cisco 7600 Router. Extensive use of Microcode 
   on Ezchip NP3c NPU. Enabled 150 ms link failure detection with enhanced scale.
- Deliver BFD stateful switchover and BFD on Switched Virtual Interfaces.
- Owner of lawful intercept on Cisco 7600 platform.

### Senior Software Engineer @ Wipro Technologies
Jan 2005 – Jan 2008
WRLinux is one of the Embedded Operating System solutions that Wind River has to offer to its varied field of customers. Our job was to maintain the distribution and to benchmark the performance as compared to other distributions.

Developing Interrupt latency measurement framework for Intel_pxa270 (XScale processor). It involved developing a character driver to trigger an interrupt and measure interrupt latency by calculating the time difference between interrupt trigger and ISR execution and then plotting graph.

Detailed understanding of the embedded software development. Experience of Linux kernel development and device driver programming.


## Education
### B.E in EE
National Institute of Technology Durgapur

### Higher Secondary in Science
Barasat Govt High School


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

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