# Jack Qin

> Principal Software Engineer at Walmart Global Tech - K8S Infra/Networking

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

## Work Experience
### Principal Software Engineer @ Walmart Global Tech
Jan 2022 – Present | Sunnyvale, California, United States
- Design, build and operate scalable infrastructure systems and services supporting more than 15K Walmart applications (using Istio/Envoy), in a multi-region network across multiple public clouds and private data centers with 10K+ K8S clusters
- Lead technical decisions, projects, and roadmaps 
- Collaborate with leadership and stakeholders across the company to enhance system Usability/Performance/Security/Debuggability/Resiliency/Reliability/Observability 
- Troubleshoot critical production incidents.
- Engage with vendors and open-source communities 
- Mentor junior team members

### Distinguished Member Of Technical Staff @ Calix Networks
Jan 2003 – Jan 2022 | Petaluma, California, United States
Project:	Calix Cloud (2012 - 2022)
-	Architectural design and hands-on implementation for a large-scale cloud system that manages millions of Wi-Fi routers
--	RESTful API services using various cloud technologies including AWS/NLB/Kubernetes/Kafka/Redis/RDS/MongoDB/SpringBoot/etc
--	Manage millions of concurrent real time HTTP/WebSocket network connections 
-	Background data processing
-	Worked with PLL and Customer Services to understand use cases and customer requirements 
-	Mentored junior team members
-	Worked with DevOps for microservice deployment and monitoring/recovery

Project:	Calix C7 Multiservice Access Platform (2008 - 2012)
-	Implemented multiple network protocols using Agere Network Processor 
-	Designed and implemented the OAMP services for multiple ADSL/ADSL2+ Line Cards, including card initialization, provisioning, alarm, and performance monitoring.
-	Device Driver for multiple ADSL/ADSL2+ chipsets, including TI AC5/AC7 and Conexant G24.
-	Device Driver for Gigabit Ethernet MAC and PHY on the GigaE Line Card.

Project:	Calix E5 Ethernet Service Platform (ESP) (2003-2008)
-	Device Driver for multiple VDSL2 chipsets
-	Designed and implemented the OAMP services for VDSL2 Line Cards
-	E5 OAMP application and the 3rd party protocol stack (Aricent) on the Ethernet Aggregation Card, including provisioning, alarming and performance monitoring for RSTP, LinkAgg, IGMP, VLAN, EAPS, and QOS.


## Education
### Master of Science - MS
Beijing University of Posts and Telecommunications


## Contact & Social
- LinkedIn: https://linkedin.com/in/jack-qin-b191a637

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