Experience

Descript
• United States
• Software Development
• 1 - 100 Employee
• Software Engineer

  • Aug 2023 - Present


Robinhood

• IT Services and IT Consulting

• Engineering Manager

  • Sep 2021 - Jul 2023

  Authentication Platform team, Security • Established the Authentication Platform team from 1 to ~7 engineers with focus on maintaining, improving, and revamping Robinhood’s authentication framework and infrastructure. • Led the team to ship WebAuthn (Passkeys) for Robinhood, which provided customers safe and fast access to their accounts with a delightful experience. This also made Robinhood the first Fintech company which adopts this security feature. • Led the team to reduce ~50% of… Show more Authentication Platform team, Security • Established the Authentication Platform team from 1 to ~7 engineers with focus on maintaining, improving, and revamping Robinhood’s authentication framework and infrastructure. • Led the team to ship WebAuthn (Passkeys) for Robinhood, which provided customers safe and fast access to their accounts with a delightful experience. This also made Robinhood the first Fintech company which adopts this security feature. • Led the team to reduce ~50% of AWS cost (millions) for running the authentication services.

• Staff Software Engineer

  • Jan 2021 - Oct 2021

  Trust and Safety team, Security • Migrated the authentication service (high throughput, millions QPS at peak) from EC2 to kubernetes without causing downtime. • Designed the entire backend architecture and APIs for Robinhood’s Device Approvals.



Airbnb

• United States
• Software Development
• 700 & Above Employee

• Software Engineer (Tech Lead)

  • Dec 2016 - Jan 2021

  San Francisco Bay Area Auth Infra team (former Services Infrastructure team), Trust Membership • Tech-leading Airbnb’s authentication infrastructure team, rebuilt the architecture from scratch, which included designing, implementing, maintaining, and improving the user authentication backend, signup/login backend, OAuth platform, and GDPR workflow. • Providing mentorship on all other authentication related components, which include session management/tracking, OAuth presentation service, and cache invalidation… Show more Auth Infra team (former Services Infrastructure team), Trust Membership • Tech-leading Airbnb’s authentication infrastructure team, rebuilt the architecture from scratch, which included designing, implementing, maintaining, and improving the user authentication backend, signup/login backend, OAuth platform, and GDPR workflow. • Providing mentorship on all other authentication related components, which include session management/tracking, OAuth presentation service, and cache invalidation pipeline. • Designed, implemented, and rolled out a JWT-like but strongly typed internal authentication token which is cryptographically-protected and used to deprecate the plain text user id from authentication path. • Secured Airbnb's APIs by defaulting all APIs to use a require_log_in filter, this also contributed to the company's anti-scraping initiative. Show less



Walmart eCommerce

• Brazil
• Technology, Information and Internet
• 500 - 600 Employee

• Senior Software Engineer

  • Jul 2014 - Nov 2016

  Sunnyvale Search System Team • Build the search engine for http://www.walmart.com/, using Solr as backbone and add some business logic on top of it. Modify Solr core when needed. Strive for making the search system fast, robust, and scalable. • Involved in various distributed system related projects, including Liveupdate (internal configuration management mechanism), Nead Real-time Indexing, distributed rate limiting, etc. • Work on Solr(an open source search engine) and Couchbase(an open… Show more Search System Team • Build the search engine for http://www.walmart.com/, using Solr as backbone and add some business logic on top of it. Modify Solr core when needed. Strive for making the search system fast, robust, and scalable. • Involved in various distributed system related projects, including Liveupdate (internal configuration management mechanism), Nead Real-time Indexing, distributed rate limiting, etc. • Work on Solr(an open source search engine) and Couchbase(an open source NoSQL database) plugin, which makes Solr to be able to implicitly index any document updates or changes that happen on Couchbase side, achieving real-time/near real-time search engine indexing. This project is also contributed to open source: https://github.com/LucidWorks/solr-couchbase-plugin/ Show less



Oracle

• United States
• Warehousing
• 1 - 100 Employee

• Software Engineer

  • May 2012 - Jun 2014

  Redwood Shore • Key Developer for Oracle Privilege Account Manager (OPAM), the product helping customers to better manage their accounts and passwords over different types of system such as ldap, database, unix etc. • Work on the integration over RESTful API and Linux command line tool, solid understanding in RESTful web services, XML, XSD, SQL, JSON, Linux shell script, and Java EE framework. • Implement plug-in framework, which allows users to embed user-defined programs into OPAM, dynamically… Show more • Key Developer for Oracle Privilege Account Manager (OPAM), the product helping customers to better manage their accounts and passwords over different types of system such as ldap, database, unix etc. • Work on the integration over RESTful API and Linux command line tool, solid understanding in RESTful web services, XML, XSD, SQL, JSON, Linux shell script, and Java EE framework. • Implement plug-in framework, which allows users to embed user-defined programs into OPAM, dynamically loading and executing the programs. • Experience with modifying Java ClassLoader, multi-threading infrastructure, and system load balancing. Show less



Columbia University

• United States
• Higher Education
• 700 & Above Employee

• COMS W6111 Advanced Database System Teaching Assistant

  • Sep 2011 - Dec 2011

  United States

• COMS W4701 Artificial Intelligence Teaching Assistant

  • Feb 2011 - May 2011

  United States



National Taiwan University

• Taiwan
• Higher Education
• 700 & Above Employee

• Workstation Lab Teaching Assistant

  • Aug 2009 - Jul 2010

  Taiwan • Managed unix-like machines (FreeBSD and Linux system) in the internet data center of Computer Science and Information Engineering Department, NTU. • Maintained 30 servers, including mail server, NFS server, web server and backup server. • Over 1500 people using this IDC, including undergraduates, postgraduates, professors, and alumni.

• Object-Oriented Software Design Teaching Assistant

  • Feb 2010 - Jun 2010

  Taiwan

• Introduction of Computer Science Teaching Assitant

  • Sep 2009 - Jan 2010

  Taiwan