John Quinn
@johnquinn
Senior software engineer specializing in scalable, low-latency systems and frontend-first product delivery.
United StatesWhat I'm looking for
I am a Senior Software Engineer with 8+ years building large-scale, high-performance systems at TikTok and Amazon, focused on event-driven architectures, microservices, and real-time data platforms using React, TypeScript, Java, Python, Node.js, and AWS.
I have delivered measurable business outcomes — cutting detection latency by 85% for seller-fraud detection, boosting homepage engagement by 15% and repeat purchases by 8%, and improving page-load times to sub-second across high-traffic experiences. I design and deploy scalable cloud infrastructure, implement automated testing, and optimize frontend performance for large user bases.
I am a strong collaborator and mentor who partners with product, data science, and Trust & Safety teams to drive data-driven solutions, improve reliability, and ship production-grade features with an emphasis on observability, automation, and accessibility.
Experience
Work history, roles, and key accomplishments
Senior Software Engineer
TikTok
Sep 2024 - Present (1 year 9 months)
Developed the Seller Risk Platform for TikTok Shop with event-driven services and dashboards, cutting detection latency by 85% and improving analyst productivity 3x while reducing manual review time by 40%.
Architected and delivered modern homepage and Buy Again experiences, increasing homepage engagement 15% and repeat purchases 8% while optimizing front-end performance to sub-second page loads.
Implemented large-scale enhancements to Amazon's global commerce platform, reducing median page-load time by 40% and lowering bounce rate while delivering sub-150ms backend latencies for key services.
Education
Degrees, certifications, and relevant coursework
North Carolina State University
Master's Degree, Computer Engineering
2015 - 2017
Completed a Master's Degree in Computer Engineering focused on advanced computing and systems from 2015 to 2017.
Beihang University
Bachelor's Degree, Electrical and Electronics Engineering
2011 - 2015
Earned a Bachelor's Degree in Electrical and Electronics Engineering from 2011 to 2015 with coursework in electronics and systems.
Tech stack
Software and tools used professionally
Availability
Location
United StatesAuthorized to work in
Job categories
Skills
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