Jiafang Liu

About Jiafang Liu

Software Development Engineer – Tech Lead in Amazon Access Team Apr 2022 – PresentSoftware Development Engineer with 7.5 years of experience in designing, building, and optimizinglarge-scale systems. Strong in backend architecture, AWS, and with cross-functionalproduct development, with hands-on Large Language Models (LLMs) Claude4.5 to automate amazon product classification. founded and built the Amazon Access engineering teamfrom the ground up — now a 10-member team of SDEs, all hired externally. Personally onboarded,mentored, and guided engineers on design and coding best practices. Focused on enhancing customerexperiences for benefits programs (HSA/FSA, InComm, Optum, SNAP EBT) through scalable, AI-integrated solutions.

Experience

1. Software Development Engineer

   Amazon

   May 2019 — Present

   Amazon Benefits Search Led integration of health benefit programs (HSA/FSA, InComm, Optum and SNAP EBT) into Amazon.com search for 500M+ customers. Architected solution across 11+ teams, supporting search refinements, keywords-based search, and store page for eligible products.2. Product Matching SystemDesigned 6 services mapping external product identifiers (UPC/GTIN/EAN) to Amazon ASINs, powering benefits eligibility labeling and fund usage across search, detail page, cart and checkout. Built feedback pipeline integrating internal labeling tools, LLM-based validation(Claude 4.5), and external partner data to improve classification accuracy.3. Payment Card Membership serviceCollaborated with Payments team to launch membership service linked to customer payment cards, enabling dynamic badge rendering, card-specific email notifications, and adaptive search refinements based on card type and payment eligibility in purchase.Customer ServiceLed implementation of benefit payment workflows in Amazon’s Customer Service system, supporting checkout life cycle including ordering, shipping, cancellation, and refunds. Promotion based Benefits platformSpearheaded benefits platform launch in Washington State and Baltimore City. Generated 150M+ revenue for Amazon.(amazon.com/wasnap and amazon.com/bmoresnap). Developed 11 backend services, integrating with 20+ services to manage customer/product eligibility, benefits allocation, and refunds.(amazon.com/benefitsBalance)Software Development Engineer – Payment team May, 2020 – Apr,2022 Led developing a business supplementary credit card application system. Utilized React for frontend and StepFunctions for backend to manage the card application

Education

• The George Washington University - School of Engineering & Applied Science

  Master of Science - MS

  2016 — 2018

• Anhui University of Finance and Economics

  Bachelor's degree

  2012 — 2016