[Area: Security]

Authorization Service

1. Founding member and tech lead of AuthZ who bootstrap a novel PBAC based authorization platform (similar to AWS IAM). Heavily involved in model and system design, hands-on implementation, debugging and fire fighting, and customer requirement collection and fulfillment

2. Our less-than-five initial engineer team took over two legacy authorization services (RBAC + ACL), maintain and migrate them in addition to building and refining our new service. The team now grows to more-than-fifteen engineer team, finished migrating the largest legacy one with 2000+ applications inside the company, and our service holds billions of permission data, and serving one of the most complex security, data governance and compliance use cases in the world

3. Mentoring members, reviewing design and code, conducting cross team collaboration, customer onboarding, compliance requirement consulting etc.

[Area: Storage]

Distributed Storage

1. Core data disaggregated storage (similar to EBS)

a) Storage Manager: development in control plane for NBD storage as a service based solution

2. Warm storage (similar to HDFS)

a) Flash storage platform for RocksDB based services: developed large scale fault tolerant system and conducted read/write performance optimization

b) Cross region encoding for Haystack: development in client side file APIs and conducted latency optimization

c) Warm storage and Haystack container: development of block interface for container API

[Area: Compute]

Cluster Management & Orchestrator

1. Tupperware (similar to Kubernetes)

a) Scheduler: developed large scale scheduler performance framework and conducted scheduler performance regression root causing

b) TWShared (Facebook cloud): cluster management - shared pool stability maintenance and debugging, health and efficiency monitoring, capacity and demand automated management and grant control

2. Web

a) Dyno: developed distributed real time streaming processing of large scale Web server logging

3. Performance Engineering

a) Performance analysis and improvement for various services including both Web products and infra services

b) Profiling and root-causing tools and system benchmarking

[Area: Network]

Conducted performance analysis and implement improvement on:

1. Oracle Infiniband driver stack

2. Oracle RDS and user verb kernel bypassing network protocol stacks

3. Solaris SPARC cloud platforms