Wei-shiun Tsai - Software Development Engineer In Test (SDET) at Esgyn Corporation

Wei-shiun Tsai

Software Development Engineer In Test (SDET) at Esgyn Corporation

San Francisco, California, United States

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Summary

👤

Senior

🎓

Top School

Wei-shiun Tsai is a seasoned SDET with 12+ years of experience building and validating large-scale database and data warehousing systems, currently testing EsgynDB in the San Francisco Bay Area. He combines low-level systems knowledge from kernel and NonStop migrations with full-stack test automation skills, spanning C/C++, Java, Python, JDBC/ODBC and Maven-based frameworks. At HP and in open source he designed testing frameworks for Trafodion and ported Phoenix tests, contributing to the Apache Trafodion project by hardening its test infrastructure and SQL validation. He is comfortable managing multi-node clusters and AWS, running endurance and scalability suites, and resolving cross-environment issues such as time zone discrepancies. Known as a quick learner and lone-US QA lead at Esgyn, he also authored deep technical documentation and diagnostic tools for complex database tuning. His background blends hands-on systems engineering with pragmatic test strategy, making him adept at turning obscure failures into repeatable, automated checks.

12 years of coding experience

20 years of employment as a software developer

Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at National Taiwan University

Master of Science - MS, Computer Science, Master of Science - MS, Computer Science at Stanford University

Github Skills (9)

javas10

apache10

sql10

java10

test-automation10

testing10

maven9

cprogramming-language5

c-language5

Programming languages (1)

C++

Github contributions (2)

apache/trafodion

Nov 2013 - Jan 2015

Apache Trafodion

Role in this project:

Back-end & Test Automation Engineer

Contributions:13 commits, 2 PRs in 1 year 2 months

Contributions summary:Wei-shiun primarily focused on enhancing the testing infrastructure and adapting the code to support the Apache Trafodion database system. Their contributions involved modifying existing test files, updating build configurations (Maven), and adding new test cases to validate SQL syntax and features like "LIMIT n" and transaction handling. They also addressed time zone discrepancies in tests, demonstrating a focus on ensuring test accuracy across different environments. In addition, the user was involved in updating the code based on Trafodion implementation changes, such as changes in catalog names.

dbmsapachebig-datasparknetwork-server

WEISHIUN/incubator-trafodion

Aug 2015 - Jul 2017

Contributions:5 pushes, 3 branches in 1 year 11 months

javaincubatingapache

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