Jason Park
jason.hyunjoon.park@gmail.com
|
206-234-1484 |
linkedin.com/in/jasonhjpark
|
Irvine, CA
Senior Fullstack Software Engineer with 15 years of experience leading and scaling distributed systems at Stripe,
Amazon, and startups. Proven ability to drive technical innovation, enhance developer experience, and build
high-performance systems that improve reliability, security, and business impact at scale.
Experience
Senior Fullstack Software Engineer @ Stripe, Remote (Irvine, CA)
6/2022 - 2025
●
Tech Lead
for a project that scaled Stripe’s fraud protection system, expanding supported payment methods
by
50x
. Led the initiative from ideation to technical design and development, culminating in a
successful
alpha/beta launch screening $10MM+ in transactions per day
and
reducing fraud rates by 30%+
on
major payment methods.
(Java, Ruby, TypeScript, React, GraphQL, gRPC)
●
Designed and integrated a
vision ML-based web app
, specifically a
card image verification application
,
into the Stripe ecosystem. The application screened fraudulent attempts using fake cards, significantly
enhancing security. Conducted a
full UX/UI overhaul
and ran
A/B tests
that
increased engagement by
20%
.
(Node.js, TensorFlow.js, TypeScript)
●
Awarded org-level recognition
for entirely rewriting frontend developer experience setups. Replaced all
manual dev steps with scripts/commands; moved all system variables to env variables via commands.
Reduced dev ramp up time from days to minutes
.
Senior Software Engineer @ Amazon, Seattle/London
11/2016 - 6/2022
●
Spearheaded cross-functional initiatives to optimize website latency, generating
$30MM+ in annual revenue
gains. (JavaScript, performance profiling, Java)
●
Reduced API service traffic by
60%
and cut hardware costs by
$3M+
annually through strategic caching
optimizations. (Java, Memcached)
●
Led a team of
5 engineers
in enhancing the retail website experience for non-Prime customers, overseeing
architecture, technical designs, and backend service deployment
, significantly improving engagement.
Full Stack Developer as Freelance, Seoul (S.Korea)
3/2015 - 10/2016
●
Developed two API services and two content management systems for mobile apps used by multinational
clients.
(Node.js, React.js)
●
Built
three educational JavaScript-based online games
for UK local councils.
●
Designed and deployed
a local community platform
using
Node.js, React.js, GraphQL, Redis, AWS.
Full Stack Developer @ LateRooms.com, Singapore
8/2014 - 2/2015
●
Modernized the
account management service
on a Node.js stack, improving user acquisition rates.
●
Enhanced system architecture to support multiple brands, increasing code reusability.
IT Consultant @ Avanade, Singapore
5/2012 - 8/2014
●
Led a team of
10 engineers
in delivering a
1000+ manday project
for the
Inland Revenue Authority of
Singapore (IRAS)
, designing an online corporate income tax filing system on the
.NET stack
.
Education
University of Auckland, Auckland (New Zealand)
●
Master of Engineering (Hons.) in Software Engineering
2008 - 2009
●
Bachelor of Engineering in Software Engineering
2004 - 2007
Awards
●
Amazon - 9th place (out of 234 teams) in Fraudulent Returns Detection ML competition
2021
