Stack Developer Software

Yangyang Li

Senior Full Stack Developer

***************@*****.*** Ottawa, ON, Canada linkedin.com/in/yangyangli-ca ABOUT ME

I am a Full Stack Developer with over 5 years of experience designing, developing, and maintaining, high performance web applications using ReactJS, NextJS, TypeScript, Angular, Python, NodeJS and Spring Boot. I am highly skilled in the architectural design and implementation of scalable enterprise web applications, including web development, database design, and system deployment. I am passionate about leveraging my technical proficiency to drive innovation, streamline workflows, and deliver impactful solutions in fast-paced, dynamic environments. I have excellent communication skills, and I am always trying to be nice with people and create quality work. Professional Experience

Penguin Benefits

Senior Full Stack Developer

•Architected and launched a cloud-native parental leave SaaS 01/2024 – Present

Ottawa, ON, Canada

platform using Java (Spring Boot), PostgreSQL, Redis, and React; improved employee planning efficiency and accelerated manager workflows for enterprise clients.

•Led enterprise integration and branding of platform into benefits ecosystems of New York Life, Prudential, and Voya, supporting projected scale of 100K+ employees across 100+ employers by 2025.

•Built a modular benefit calculation engine using Groovy, supporting earnings thresholds, replacement ratios, and duration rules; ensured precise, policy-compliant benefit estimates at scale.

•Migrated auth system from Firebase to AWS Cognito with MFA and SSO, streamlining onboarding and reducing user-related support tickets by 20%.

•Used JMeter to identify and resolve key performance bottlenecks, cutting latency by 35% and boosting SLA from 99.5% to 99.9%.

•Developed a Cypress-based automated and visual regression testing suite, reducing manual QA effort by 70% and accelerating. Full Truck Alliance

Senior Software Developer

•Developed and enhanced the YMM app’s checkout system using Domain- Driven Design and microservice architecture, handling complex financial transactions across carriers, shippers, and platform entities using Angular, NodeJS and Python. Integrated payment and logistics features, scaling daily transactions to 500,000+ orders.

10/2020 – 07/2023

Nanjing, Jiangsu,

China

•Led architectural overhaul by introducing a scenario-based framework, improving development agility by 30% and reducing redundant code. Enabled flexible support for specialized logistics scenarios including cold chain and short-distance delivery.

•Applied the Saga pattern to ensure consistency and fault tolerance in payment workflows, handling cargo updates, order creation, contract generation, and waybill processing across distributed systems.

•Led a 5-person reliability team to govern transaction platform stability, optimizing system topology, tuning SQL, and resolving Redis HotKey/BigKey issues; improved fault tolerance and cut annual downtime to under 20 minutes.

Ximalaya Network Technology

Senior Software Developer

•Contributed to user growth to 32.83M paying users and billions of plays by building monetization features for the Himalaya app using ReactJS and Spring Boot, including “Ad-Watch for Free Listening” and “Limited-Time Freebies” on Album Details pages.

02/2019 – 10/2020

Shanghai, China

•Scaled Album Central Service to handle 100K+ API requests/sec with P99.99 latency of 150ms, supporting commercialization, online education, and live broadcast features across 80M+ audio albums. Gechen Information Technology

Intermediate Software Developer

•Launched a hotel booking platform integrated with Ctrip and thirdparty APIs, supporting real-time pricing and booking; generated ¥300K+ in revenue and 300+ room-nights in the first month.

10/2017 – 01/2019

•Developed a flight ticketing module via Difeng Holiday API integration, enabling search, fare checks, and bookings; broadened company travel offerings and improved user convenience.

Education

Algonquin College of Applied Arts and Technology

Diploma, Computer Programming

09/2023 – 12/2024

Ottawa, ON, Canada

Huazhong University of Science and Technology

Bachelor's degree of Engineering

09/2012 – 06/2016

Wuhan, China

Skills

ReactJS

Python

MongoDB

AZURE

NextJS

NodeJS

PostgreSQL

CI/CD

TypeScript

Spring Boot

RESTful API

Agile Management

Angular

MySQL

Docker

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