Justin Warmkessel
Software Engineer at PayPal
Sunnyvale, California, United States
Summary
👤
Senior🎓
Top SchoolJustin Warmkessel is a seasoned software engineer with 12 years of experience delivering mobile and web applications in startups and enterprise settings. He currently contributes to PayPal's iOS wallet UI, engineering the Order Ahead and In-Store flows to deliver a smooth user experience. Earlier at Y Media Labs, he led architecture and core development for the original ResearchKit-based medical apps announced by Apple, enabling secure health data collection across major studies. He brings full-stack versatility, having built native iOS apps, Node.js backends, and MongoDB-driven dashboards for Goosii, as well as front-end features for high-traffic products. Based in Sunnyvale, CA, and educated at UC Santa Cruz, he thrives in fast-paced environments that blend practical engineering with product impact.
13 years of coding experience
5 years of employment as a software developer
Santa Clara UniversityUniversity of California Santa CruzLynbrook High School
English, Chinese, French
Stackoverflow
116reputation
9kreached
1answer
0questions
Github Skills (59)
paypal10
braintree10
payment-service9
visa9
aws-sdk-ios9
aws-sdk9
storekit9
amazon-web-services9
in-app-purchase9
sdk9
payment9
swift8
adyen8
obsolete8
payment-processing8
Programming languages (7)
Github contributions (5)
jwarmkessel/Motcha
Feb 2023 - Apr 2023
Contributions:13 reviews, 17 PRs, 21 pushes in 2 months
jwarmkessel/ResearchKit
May 2015 - Jul 2015
Contributions:1 push, 1 branch in 2 months
open-source-softwareresearchkitmedicalsoftware-framework
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