• 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

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.