★Programming Java, C/C++, JavaScript, Swift, Objective-C, Python, SQL, Scheme ★Tech Stacks Node.js, RESTful, GraphQL, WebSocket, iOS/Android, React/React Native, MySQL, Cassandra, Solr, Sequelize ORM, Kafka, Object-oriented programming, Agile development

2019 — NowGoogleSenior Software Engineer

2019 — Now

San Francisco Bay Area

YouTube Premium, Commerce, Nitrate

2017 — 2019Qventus, IncSoftware Engineer

2017 — 2019

Mountain View, California

Built a RESTful server (Java) and a GraphQL server (Node.js). Features JWT

authentication, OAuth SSO, mobile push notification, WebSocket API, real-time data/message

delivering.

Lead engineer of a high performance cross-platform mobile app (React Native). Integrated with

GraphQL, Apollo cache, React Redux, Firebase Cloud Messaging, Jest etc.

Implemented a real-time chat micro-service using Pubsub (Message Queue) & GraphQL Subscriptions

(WebSocket). Supports cross-platform communication (Web, iOS, Android)

Optimized Sequelize ORM generated SQL query with subquery and indexing.

2016 — 2016RealstaxMobile Engineer Co-op

2016 — 2016

San Francisco Bay Area

Responsible for development, testing, release and support of mobile apps (iOS: Swift, Android: Java) Worked closely with UI/UX designers and clients to implement features and provide feedback

Refactored the iOS app from MVC to MVVM for better modularization, and adopted ReactiveX/RxSwift to optimize async operations and event/data streams

2015 — 2015LyricFind Inc.Full-stack Software Developer Co-Op

2015 — 2015

40 Eglinton Ave. E, Toronto.

Developed and maintained components for LyricFind API: front-end development (JavaScript, jQuery, HTML5), server-side development (Java, SQL), adding new features and application logics, maintaining data persistence and bug fixing

Migrated all API data from old databases to the newly developed Solr database, created SQL scripts to maintain the data integrity and indexed data to support faster Solr data search

2014 — 2014IBM CanadaDB2 Developer Co-Op

2014 — 2014

Markham

Contributed to development of tools to covert row-organized tables to column-organized tables in IBM DB2 with BLU Acceleration to allow optimized in-memory computing (C++, SQL)

Created scripts to perform functional testing for “DB2 Cloud” on Amazon EC2 platform (Perl, SQL)

Education

University of Waterloo

Experience+

Education

Bachelor of Computer Science