Yancong Li
Software Development Engineer Ii @Amazon
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WORK HISTORY
Software Development Engineer Ii @Amazon
Vancouver, BC, CA
Led end-to-end development of OTC Benefits payment method card registration, owning backend verification architecture and expanding scope to include frontend integration to ensure seamless third-party processor onboarding and delivery.• Enhanced the card registration flow within Amazon Payments eXperience (APX) by improving UI layout, security messaging, input validation, and error handling across desktop and mobile platforms.• Implemented key customer-facing capabilities including tokenization failure handling and dynamic expiration date collection, ensuring a secure, resilient, and consistent registration experience.• Designed and delivered a verification SPI and secure service APIs enabling scalable and compliant access to sensitive payment data for external partners, aligned with internal security and privacy standards.• Owned launch-readiness monitoring by creating a centralized dashboard for dial-up tracking and incident response; acted as one of the primary on-call engineers, contributing to a smooth launch with 99.9%+ uptime and zero customer-facing issues.• Integrated as the first internal client of a new plugin-based microservice framework, establishing integration patterns and building partner-response simulation tooling that reduced onboarding delays by ~20%.
EDUCATION
The University of British Columbia
Bachelor of Science (BSc), Computer Science
Udacity
Front-End Web Developer Nanodegree, Computer Software Engineering
ABOUT YANCONG LI
As a Software Development Engineer at Amazon, I build scalable payment systems that power secure and reliable customer experiences at global scale.I recently led the end-to-end development of the OTC Benefits payment method card registration flow, owning the backend verification architecture while expanding scope to frontend integration to ensure seamless onboarding with third-party payment processors.My work focuses on designing secure, extensible platforms for sensitive financial data, including building verification APIs, service provider interfaces (SPI), and integration patterns that allow external partners to interact with Amazon’s payment ecosystem safely and efficiently.I enjoy working on problems where product delivery meets distributed systems design — turning complex regulatory and partner requirements into reliable, scalable software.Highlights of my recent work include:• Launching customer-facing payment registration capabilities including tokenization failure handling and dynamic expiration collection across desktop and mobile• Designing secure service APIs and verification SPI enabling compliant partner integrations• Creating launch-readiness dashboards and acting as a primary on-call engineer to support production dial-up with 99.9%+ uptime and zero customer impact• Serving as the first internal client of a plugin-based microservice framework, establishing integration patterns and simulation tooling that reduced partner onboarding delays by ~20%I’m motivated by building systems that scale globally, adapt to evolving requirements, and deliver measurable impact for customers and partners.Specialties: Backend Systems, Distributed Architecture, Java, AWS, Payment PlatformsAcademic Interests: Data Structures, Algorithms, System Design
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