Justin Khoo
Founder at ProofJump
Sunnyvale, California, United States
Summary
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SeniorJustin Khoo is a seasoned founder and email engineering specialist with 11+ years building tools that simplify and scale email campaign production. As founder of ProofJump and previous founder of Campaign Workhub, he designs zero-setup SaaS that reduces QA time by up to half and collapses messy review cycles into a single, auditable dashboard. His background spans hands-on engineering and product roles—from early web and voice application work to consulting for eBay and building innovative email UX at Advenix—giving him a rare blend of systems-level thinking and email-specific expertise. Justin also publishes and researches modern responsive and interactive email techniques through FreshInbox, staying at the cutting edge of deliverability and dynamic content. Clients praise his products for turning error-prone workflows into predictable, repeatable campaigns, and he’s built ProofJump specifically to capture feedback and verify fixes without spreadsheets or overflowing inboxes. Based in Sunnyvale, he combines startup grit with practical engineering experience to solve a niche but costly marketing problem.
11 years of coding experience
11 years of employment as a software developer
Stackoverflow
3,261reputation
149kreached
3answers
7questions
Github Skills (8)
angularjs-service6
datetime6
javascript6
fileinputstream6
dataframe6
jetty6
angularjs6
java6
Github contributions (2)
freshinbox/tabs-for-email
Nov 2014 - Sep 2015
Contributions:3 commits, 2 pushes in 10 months
freshinbox/php-email-pixel
Jul 2021 - Aug 2021
Contributions:9 commits, 8 pushes, 1 branch in 20 days
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