Find Me


Zero Cho, a.k.a 傑洛 / 卓建安

Work Experiences

Iago Education Inc.

Co-founder 2022/08 - now

Robinhood Markets, Inc.

Engineering Manager 2020/08 - 2022/07

  • Lead Retirement, Original Content Team

Web Engineer 2018/07 - 2020/08

  • Consumer Web Team (Trading UI, Gold, International Expansion, etc…)

Twitter, Inc.

Senior Software Engineer 2016/08 - 2018/06

Software Engineer 2014/06 - 2016/08

  • Desktop Web: Full-stack Scala/JavaScript
  • Web-Tools: Deploy/Testing infrastructure
  • Twitter Lite: Data-minded mobile web (React/Redux)

Software Engineering Intern 2013/05 - 2013/07

  • Web Core team (FE/BE framework)
  • Winner of Hackweek’13
  • Implemented pop-up notifications from microservice to frontend


Contractor 2012/01 - 2012/08

  • Mobile and web platforms research
  • Prototyped Android Custom UI components
  • Prototyped HTML5/Javascript Game

MediaTek, Inc.

Software Engineering Intern 2011/07 - 2011/08

  • Android System Team
  • Developed GDB/Python extensions for kernel dump forensics


Developer 2008/08 - 2011/09

  • Individually developed web editors for Ticket and Wide
  • Maintained PDF framework in Cocoa and its Ruby DSL wrapper
  • iOS application development
  • Mac OS X / Linux System Administration

NCU eecesnmg

Leader 2007 - 2010

  • System Network Management Group, Department of Electrical Engineering & Communication Engineering, National Central University
  • Lead the group for the major system transition (FreeBSD 4 to ArchLinux)
  • Experiences of major system failure recovery (Hard disk failure due to power outage)


Georgia Institute of Technology

Atlanta, GA, USA MS CS 2012/08 - 2014/05

National Tsing Hua University

Taipei, Taiwan MS CS 2010/09 - 2012/06

National Central University

Taoyuan, Taiwan BS Communication Engineering 2006/09 - 2010/06

  • Overall GPA: 3.1/4.0
  • Major GPA(Computer Science): 3.7/4.0

Exam Scores

  • TOEFL-iBT Total: 107 (R: 29, L: 28, S: 23, W: 27)
  • GRE V 149/42%, Q 163/88%, AWA 3.5/29%


Journal Papers

Chih-Lin Hu and Chien-An Cho, “User-provided multimedia content distribution architecture in mobile and ubiquitous communication network”, Journal of Network and Computer Applications, Vol. 34, pg. 121-136, January 2011 [Paper]

Chih-Lin Hu, Chien-An Cho, Chang-Jung Lin and Chen-Wei Fan, “Design of mobile group communication system in ubiquitous communication network”, IEEE Transactions on Consumer Electronics, Vol. 56, pg. 88-96, Feburary 2010 [Paper]

Chih-Lin Hu and Chien-An Cho, “A Novel Mobile Content Delivery Scenario with Simple Double-Key Secure Access Control,” International Journal of Security and Its Applications, Vol. 3, No. 1, pp. 1-16, January 2009. [Recommended by UMC’08] [Paper]

Conference Papers

Chih-Lin Hu, Chien-An Cho, Chang-Jung Lin, Chen-Wei Fan, “A location tracking and messaging system for mobile group communication in IP networks,” International Conference on Consumer Electronics (ICCE), 2010 [Paper]

Chih-Lin Hu, Chien-An Cho and Po-Jung Wang, “Secure Mobile Content Delivery Architecture in Hybrid Network Environment,” accepted by the 2008 International Symposium on Ubiquitous Multimedia Computing (UMC’08), Hobart, Australia, Oct. 13-15, 2008. [Rate: 22% (46/201)] [Paper]


Chih-Lin Hu, Chien-An Cho and Po-Jung Wang, “System and method of mobile content sharing and delivery in an integrated network environment,”, US Patent App 13/338,489 [ref]

Chih-Lin Hu, Chien-An Cho, Chen-Wei Fan, Chang-Jung Lin, “System and method of mobile group positioning,”, US Patent App 12/654,050 [ref]


eBay GaTech Hackathon ‘13

eBay 2nd Prize

  • Facebook graph search for eBay items

Taipei Fun App Contest ‘11

Taipei City Government 1st Prize

Embedded System Contest ‘11

Ministry of Education, Taiwan Honorable Mention

  • Augmented Reality Home Controller

Telecom Value-Added Contest ‘10

Chunghwa Telecom Honorable Mention

  • Home automation system integrated with MOD and sensor network

WWDC Scholarship ‘09

Apple Inc.

MobileHero Android Software Contest ‘09

Ministry of Economic Affairs. Taiwan 2nd + Google Prize

  • KerKerInput, an Android Chinese Input Method framework

Telecom Value-Added Contest ‘09

Chunghwa Telecom 1st Prize

  • SLIMA, A location-based photo blogging system with timeline

ICSCA Contest ‘09

Ministry of Education, Taiwan 1st Prize

  • ICSCA: Internet Communication Softwares and Creativity Application
  • Inter-vehicle Communication System on Android

Software Creativity Contest ‘08

Ministry of Education, Taiwan Honorable Mention

  • JudgeOnRails, online program grading system for school

School Projects Contest ‘07, ‘08, ‘09

National Central University, Department of EE/CS, Taiwan Honorable Mention

  • MBS, Adaptive media streaming service for Wireless network ‘08
  • MobileSync, Data synchronization and access method for hetrogeneous network ‘07
  • RoomRider, in-door room map conduct and positioning using Zigbee ‘07