Johnny Chang
Member Of Technical Staff at Perplexity
Taipei, United States
Summary
👤
Senior🎓
Top SchoolJohnny Chang is a software engineer with a decade of experience building 0→1 products, AI research prototypes, and highly available distributed systems for fintech and healthcare. He has shipped scalable APIs and cloud-native platforms used by millions—most recently contributing to Galileo Financial Technologies’ backend serving 160M+ customers and previously leading core product development at a fintech startup that reduced cloud costs by 50%. Comfortable across Python, Go, Java/TypeScript stacks and all major clouds, he bridges ML/LLM research and production: at CMU he reimplemented Tree-of-Thoughts and built an LLM-powered code review deployed in classrooms. Johnny’s side projects explore practical AI agents (stock recommendation systems) and an AI chatbot with built-in version control, reflecting a bias for applied research and reproducible experimentation. Based in Taipei with international experience, he combines hands-on engineering with measurable product impact and operational rigor.
10 years of coding experience
6 years of employment as a software developer
Bachelor's degree Mechanical Engineering, Bachelor's degree Mechanical Engineering at National Taiwan UniversityBachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Oregon State UniversityMaster of Science - MS Software Engineering, Master of Science - MS Software Engineering at Carnegie Mellon University
Chinese, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (118)
authentication10
spider10
pip10
scrapyd10
python-development10
django10
openid-connect10
two-factor-authentication10
virtualenv10
user-experience10
template-tags10
django-allauth9
rest9
saml9
python9
Programming languages (9)
Github contributions (5)
hiimdoublej/django-json-ld
Jan 2019 - Feb 2022
a template tag to help render json-ld structured data.
Contributions:2 reviews, 35 commits, 19 PRs in 3 years 1 month
json-ldtemplate-tags
hiimdoublej/Awesome-CV
Feb 2020 - Jun 2026
:page_facing_up: Awesome CV is LaTeX template for your outstanding job application
Contributions:41 pushes in 6 years 5 months
templatelatex-templatejoblatexjob-application
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