John Holdun
Staff Software Engineer at The RealReal
Los Angeles, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJohn Holdun is a Staff Software Engineer in Los Angeles with 15 years of experience building and stabilizing web products across startups and agencies. He leads small teams to deliver top-of-funnel features and migrations, currently introducing Web Components and guiding a Next.js/React migration at The RealReal. A pragmatic polyglot, he’s shipped backend services that handle millions of rows and improved observability and performance at scale. At Postlight he worked across the stack on APIs and CMS projects for clients like the MTA and Axios, and contributes to open-source tooling such as the postlight/parser to make web content extraction more reliable. He combines hands-on coding with engineering-led knowledge sharing and mentoring, and brings an unusual creative bent from studying dramatic writing that helps him translate vague problems into clear product solutions.
15 years of coding experience
12 years of employment as a software developer
Half a BFA, Dramatic Writing, Half a BFA, Dramatic Writing at New York University
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (8)
parserator10
javascript10
nodejs10
parser10
webscraping10
jestjs9
html8
css6
Programming languages (6)
Github contributions (5)
postlight/parser
Apr 2019 - Oct 2022
📜 Extract meaningful content from the chaos of a web page
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 releases, 44 reviews, 14 commits in 3 years 7 months
Contributions summary:John primarily contributed to the Postlight Parser project by addressing bugs, enhancing existing features, and maintaining the codebase. They fixed an issue related to the Content-Type header and added specific date formats to extractors, improving the parser's ability to handle different website structures. The user also refactored code by inlining test fixtures, and updated the dependencies.
chaosrollupmercury-parserjestmercury
johnholdun/puthtml
Jan 2015 - Feb 2016
Contributions:8 PRs, 8 pushes, 8 branches in 1 year 2 months
javascriptserve
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