Image of Christianto Liu

Christianto Liu

Full Stack Developer

Engineering Manager at Copper

San Francisco Bay Area

Section title

Christianto Liu's Email Addresses & Phone Numbers

Christianto Liu's Work Experience

Tophatter

Full Stack Developer

2015 to October 2017

BlinkPal

Founder and Full Stack Developer

March 2013 to August 2015

Taipei City, Taiwan

TSMC

Technical Manager

October 2011 to March 2013

Hsinchu County/City, Taiwan

Christianto Liu's Education

Cornell University

Master’s Degree, Electrical and Computer Engineering

Cornell University

Doctor of Philosophy (Ph.D.), Electrical and Computer Engineering

Caltech

Bachelor’s Degree, Electrical Engineering

About Christianto Liu's Current Company

Tophatter

Implemented engineering solutions for an online auction marketplace on a Rails/MySQL stackCustomer Acquisition Funnel (Q4 2015—Q2 2016)- Fixed pay flow on mobile web and helped achieve a 3x increase in web revenue by Q3 2016- A/B tested various web user registration strategies to improve registration rate- Implemented buyer credits at various steps in the funnel to improve...

About Christianto Liu

📖 Summary

Full Stack Developer @ Tophatter Implemented engineering solutions for an online auction marketplace on a Rails/MySQL stackCustomer Acquisition Funnel (Q4 2015—Q2 2016)- Fixed pay flow on mobile web and helped achieve a 3x increase in web revenue by Q3 2016- A/B tested various web user registration strategies to improve registration rate- Implemented buyer credits at various steps in the funnel to improve buyer conversion rateInternationalization (Q3 2016—Q1 2017)- Localized the server and web client to 4 languages and 10 currencies- Implemented shipping subsidy to improved international buyer conversion rate- Helped grow international revenue 7x by Q1 2017Infrastructure (Q3 2016)- Reduced bandwidth usage by 50-75% by designing and implementing an online image resize service using ThumborCustomer Experience (Q2 2017)- Implemented a new return policy that handles each shipping region separately- Implemented a new auto-refund policy that triggers based on thresholds set by each seller- Created a web signup flow that allows users to skip registration and start bidding immediatelyBrand (Q3 2017)- Created an A/B testing framework for first-time visitors based on session cookies- Updated graphic assets and color schemes for web, Android, and iOS clients- Created mailer templates that are responsive to desktop and mobile clientsData Analytics (Q4 2015 - Current)- Implemented tracking on server side that interface with 3rd party vendors such as Google and Facebook to track user conversion and purchases From 2015 to October 2017 (2 years) Founder and Full Stack Developer @ BlinkPal Designed a real-time, video-based dating platform on a Rails/MySQL stack that enables users to join online speed dating events and interact via video chatBack End- Designed and implemented RESTful APIs for access to user data and system content- Implemented Faye message server to enable real-time messaging between users- Created Sidekiq jobs to send data to clients at scheduled times in the background- Used Memcached to cache data and reduce database access for better performance- Designed a two-step, token-based authentication system for API accessFront End- Created an admin website to launch online speed dating events- Implemented JavaScript version of OpenTok API for real-time video on web browsersInfrastructure- Setup AWS EC2 servers for development and production environments synchronized via SVN- Setup Multi-AZ RDB for high database availability- Tested server reliability and throughput using JMeter- Improved server performance by moving static content to AWS S3 and through page caching From March 2013 to August 2015 (2 years 6 months) Taipei City, TaiwanTechnical Manager @ TSMC - Led development efforts among 3 internal teams and vendors for InFO-WLP packaging- Engaged with customers weekly to provide program updates and discuss action items- Authored and presented InFO-WLP packaging at a global conference- Reported to the managing director on 3D Integrated Circuits (IC) market trends From October 2011 to March 2013 (1 year 6 months) Hsinchu County/City, TaiwanSenior Hardware Engineer @ Achronix Semiconductor - Joined as the first employee in this ultra-fast FPGA (programmable logic) company- Led 3 FPGA projects from design to testing (Memory, multiplier, and switchbox designs)- Developed an objected-oriented Python program for IC verification, extraction, and simulation- Implemented Python scripts for functional verification, timing, and power analysis of IC From March 2006 to February 2010 (4 years) San Francisco Bay AreaEngineering Manager @ Copper San Francisco Bay AreaSenior Software Engineer @ Copper From November 2017 to January 2020 (2 years 3 months) San Francisco Bay Area


Christianto Liu’s Personal Email Address, Business Email, and Phone Number

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Frequently Asked Questions about Christianto Liu

What company does Christianto Liu work for?

Christianto Liu works for Tophatter


What is Christianto Liu's role at Tophatter?

Christianto Liu is Full Stack Developer


What is Christianto Liu's personal email address?

Christianto Liu's personal email address is l****[email protected]


What is Christianto Liu's business email address?

Christianto Liu's business email addresses are not available


What is Christianto Liu's Phone Number?

Christianto Liu's phone (**) *** *** 162


What industry does Christianto Liu work in?

Christianto Liu works in the Computer Software industry.


Who are Christianto Liu's colleagues?

Christianto Liu's colleagues are Brian Gibb, Kyle Linde, George Nursall, Brett Celani, Jack James, Sean Cox, David Randolph, Justine Seastres, Liz Anderson, and Melville Cheryeth


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Christianto Liu's Personality Type

Extraversion (E), Intuition (N), Feeling (F), Judging (J)

Average Tenure

2 year(s), 5 month(s)

Christianto Liu's Willingness to Change Jobs

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