- Jumped from previous job writing iOS apps into cutting edge AR backend server in C++ day one- Found critical security exploit in ZeroMQ library and disclosed it responsibly: https://github.com/zeromq/libzmq/issues/3558- Being the one person DevOps for AR team, adopt infrastructure as code, helped launching and deploying AR backend server for Pokemon Go Shared AR Buddy Feature, since launch till 2021, had zero incidence- Designed and built anonymization data pipeline in Java based on Kafka for POI scan AR mapping feature, processing data in million and million of data scale in sandboxed environment- Built an operator for running Redis clusters on Kuberneter cluster in Go lang

- From a Python shop, delivered a notification latency monitoring system in the very first week written in Ruby - Migrated administrator dashboard from the monolithic RoR repo to a standalone RoR app - Coordinated with other staff and developed internal tools for improving their productivities - Sole developed a shopping cart system integrated with fulfillment service along with administration dashboard - Implemented Salesforce integration from backend RoR to front-end Ember.js - Jumped in iOS team on demand and lead developed a major feature (visitor stamp), delivered in short period - Fine tuned the the iOS UI down to pixel level, added awesome physical UI animation with UIKit Dynamics - Introduced ReactiveCocoa to iOS project, refactored legacy code and wrote the very first UI automation tests, unit tests and integration tests for the iOS projects - Implemented image processing system for making company logo images become stamp images

BalancedPayments is a payment processing company for marketplaces, it processed 370 million per year. What I contributed - Explore new cutting-edge technologies like Docker / Ansible / AWS Elastic Beanstalk, established the best practice and bring them back to the team - Upgraded credit card data vault server to next level design for reducing the PCI scope - it's like a heart surgery as hundred million dollar transactions and credit card security rely on it. - Lead developed an open source recurring payment system - Designed and implemented dispute filing portal, automatic submit files to different credit card processor upstream, saved co-worker from manual processing hell

Now.in is a free online radio platform I founded when I was studying in university. I started the project at 2006, the website goes online at 2009. I did many outstanding achievements with a very limited budget and a one-person army in after-school time: - 50K Alexa global rank - 300K members (radios) - 100 million total pageviews - 15K simultaneous online audience - 1.5Gbps total outbound bandwidth - 100 different country users - 13 languages supported I developed the whole ecosystem on my own, including: - Streaming servers with high scalability and availability - Dashboard for monitoring and managing streaming servers - Internationalized & localized website application - High performance web-based chatroom - Realtime web-based music information pushing server - Cross platform desktop GUI application for broadcasting - RESTful API service for mobile Apps - Flash radio player - Utility tools Except the iOS app and Android app. For running the website, I also do: - Continuous integration and testing - Hosting service purchase - Server deployment - Server administration - Server migration - Customer service In this huge project, a very wide range of different technologies are used, only list some major ones: - Amazon S3 - Amazon EC2 - Amazon CloudFront - Amazon SES - Bootstrap - CentOS - Flask - Genshi - Git - HAProxy - jQuery - Jenkins - MySQL - Mercurial - Nginx - Puppet - Python - Pyramid - Redis - SQLAlchemy - SCSS - Supervisor - Twisted - uWSGI - wxPython - ZeroMQ

Plurk Inc. is a Canadian based startup, its product - Plurk.com is a microblog which has multi-million users; it is very popular in Taiwan and some Asia countries. I worked for Plurk.com as a part-time developer in telecom manner when I am studying in university for master degree, there I contributed Celebrity verification program LiteComet - High performance C++ Ajax/Comet server under BSD license Loso - Hidden Makov Model based Chinese segmentation system under BSD license

I worked as a software contract engineer.