9849-2776 Yuzhe.c85@gmail.com

Zak Chen

Computer Science Bachelor - National Taiwan Ocean University




Agile Coach / Senior Developer (2021/11 – Current)
  • Develop enterprise data warehousing solution on top of Clickhouse
  • Develop native ANSI SQL support for ByteHouse
  • Build up Agile culture over the department and mentor and lead development cycle
  • Develop metadata service in Data Warehousing Product ByteHouse
Key Achievement:
Bytehouse Metadata Service
Design and drive the development of metadata API in Bytehouse, which is a multi-tenant, multi-partner integratable solution on top of Clickhouse
Dataset Automator
Dataset Automator is a service that is horizontally scalable that is capable to generate TB level test data inside pipelines


Data Team Lead (2019/01 – 2021/10)
  • Build and maintain data pipelines that generates over 300 GB data
  • Lead and inspire members in the team
  • Build Keyword-Based user interest pipeline which generates billions cookies per day
  • Setup, monitor and run operation for more than 1000+ instances over 20+ services
  • Solution architecting for AI data pipeline
  • Lead the development process of data pipelines
  • Coach Agile Process over several teams
Key Achievement:
WebKIT(Web Keyword, Interest, Topic)
WebKIT pipeline tags keywords upon billions of cookies over 12 regions everyday on Spark-job based infrastructure, Appier uses it to perform AI prediction, user segmentation and advertisement campaigns.
At the service level, there's a Cassandra cluster which has ~300 GB throughput per day
Demographic Pipeline
The demographic pipeline generates gender, age and geolocation production over billions of cookies, it has involved 12 sub-attribution pipelines and runs on Airflow.
Web Crawler service
Design and maintain web crawler, which serves 10+ millions of requests to perform crawling, caching and proxy service management.


Lead Engineer (2018/04 – 2019/01)
  • Mentor/Lead a medium size of developers(5-7).
  • Leading development process.
  • Handle DevOps for on-premise applications.
  • Guide other member with system architectural advices.
Key Achievement:
Key Client Solution Architecting
Deploy Evie to key clients, such as related to government and banks, to design the infrastructure and private cloud arrangements


Squad Technical Leader (2016/02 – 2018/04)
  • Manage Technical development progress.
  • Business level feature/solution design and implementation.
  • Review and maintain code base.
  • Risk/Technical debts controlling.
Key Achievement:
Product Data Center System:
Build up the system receiving external data-sources and internal product information editing, crawl external website and parse useful product/hierarchy list for business usage and leverage.
Full Stack Engineer (2015/06 – 2016-01)
  • Design API data flow and define components.
  • Setup API build stable environments.
  • RoR projects contribution.
Key Achievement:
Product HIVE Service:
The business is highly dependended on updated product database. In this position, I designed a system to import product data from partner everyday.


Full Stack Engineer (2014/04 – 2015/06)
  • Project requirements understanding and features implementation.
  • System architecture analysis and design.
  • Task arrangement and negotiation with team members.
  • Solution provider and trouble shooting.
  • Skilled in Go language.
Key Achievement:
Continual development for long term project:
Due to company's business model, I took a complex project and implemented new feature and refactored for performance, meeting with other team members located in US.
Customized Cloud Computing:
Implement protocol-level function for translation between different machine that were provided by different manufacturers.

Summers Advertising

Technique Director (2012/01 ~ 2014/04)
  • Advanced web technique applying (in projects)
  • Complex systems design, estimating, and tests.
  • Total system architecture survey.
  • Development tasks arrangement.
  • Project schedule management.
Key Achievement:
  • Study and lead Ruby on Rails into Summers Advertising, and begun key value in company.
  • Support Microsoft sales’ department in Taiwan to implement Windows 8 application event. Developing and directing the application named “青春台灣食玩誌”. (http://apps.microsoft.com/windows/zh-tw/app/4745ef6e-9b32-4322-a613-1215dce3255b)
Web Developer (2010/11 – 2012/01)
  • Innovative ideas creating in web design.
  • New web technique research.
  • Create website engineering framework.
Key Achievement:
  • PHP MVC model framework.
  • Implement components to be business valuable parts.

Bamboocat Digital - PHPBB’s Traditional Chinese supporter

Project Engineer (2009/07 – 2010/08)
  • Website projects engineering.
  • Custom request analysis.
  • Website planning proposal.
Key Achievement:
The EAR system is the event record system which records emergency event or accident in fab or machines. In this system I overcome problems like cross fab or cross department authentication. This system has 7 stage approval and many types of formula.