Available for opportunities

Aaron Leung

Full-Stack Engineer & AWS Solutions Architect - Associate

From biology to bytes — I build scalable systems
and interfaces that solve real problems.

View my work My story ↓
Certified Solutions Architect – Associate
SAA-C03 · Amazon Web Services
M.S. Computer Science · Northeastern University · 3.94 GPA
01

About

From Biology to Software Engineering

My path into software wasn't linear — and that perspective shapes how I build.

I'm a Software Engineer with a background in computer science, cloud architecture, and full-stack development. I hold a Master's degree in Computer Science from Northeastern University and transitioned into tech from a background in Biology, driven by an interest in building scalable systems.

I've strengthened my foundation through a Professional Certificate in Machine Learning and AI from UC Berkeley Executive Education and by earning the AWS Certified Solutions Architect – Associate (SAA-C03).

Most recently, I rebuilt a B2B e-commerce platform supporting 13,000+ products, migrating it from a MERN stack to a serverless AWS architecture using S3, CloudFront, Lambda, API Gateway, and SES. This improved performance, reliability, and scalability while enabling features like global search, shareable filtering, and a persistent cart.

I bring a mix of healthcare and engineering experience, allowing me to approach problems with both technical depth and user-focused thinking, and I'm always looking to keep learning and building.

Problem solver Cross-disciplinary Shipping-focused Cloud-native
02

Experience

Jun 2025 – Apr 2026
ChemStandard ↗

Contract Full-Stack Developer

  • Rebuilt a B2B e-commerce catalogue for a client supplying chromatography products, reference standards, and laboratory accessories, migrating from a Render-hosted MERN stack to a serverless AWS architecture supporting 13,000+ products.
  • Architected a serverless backend using AWS Lambda, API Gateway, and SES for order/contact processing with branded HTML emails, unique order IDs, and DKIM-authenticated domain sending.
  • Deployed a static frontend on S3 with CloudFront CDN, implementing Origin Access Control and ACM SSL, achieving sub-second load times and zero downtime.
  • Implemented global product search, URL-based pagination and filtering for shareable links, and persistent cart state using Zustand with localStorage.
ReactJavaScriptTailwind CSS ZustandS3CloudFront LambdaAPI GatewaySES ACMIAMViteGit
Feb 2018 – Jul 2020
Asian Network Physical Therapy

Physical Therapy Aide

  • Supervised patients in gait and balance training, providing posture guidance to enhance mobility.
  • Audited patient records for accuracy, ensuring efficient billing and supply inventory management.
03

Projects

Full-Stack Web App
↗

Moviewer

Full-stack web application for exploring and searching movies, maintaining favorites and watch lists. Refined through extensive usability studies and iterative user feedback.

ReactNode.jsExpress MongoDBHTMLCSS
Mobile App Prototype
↗

TransitClean

Mobile prototype for monitoring cleanliness metrics across public transit vehicles. Conducted needs assessments, built personas, and iterated through usability testing.

FigmaUX Research
Mobile Game
↗

Memory Beats

Mobile memory game for matching musical intervals, with high-performance audio generation via C++ AAudio. Refined through paper prototyping and iterative user testing.

JavaC++AAudio
Cloud · This Site
↗

Cloud Resume Challenge

Static site on S3 + CloudFront, serverless visitor counter via Lambda and DynamoDB, infrastructure as code, and CI/CD pipeline through GitHub Actions.

S3CloudFrontLambda DynamoDBAPI GatewayGitHub Actions
04

Skills & Education

Languages
PythonJavaScriptJavaCSQL
Frameworks & Tools
ReactNode.jsExpressGit FigmaJupyterMapReduce
Cloud & Databases
AWSMongoDBFirebase
2024
UC Berkeley
Professional Certificate — Machine Learning & AI
2023
Northeastern University
M.S. Computer Science 3.94 GPA
2016
UC Davis
B.S. Biology — Neurobiology, Physiology & Behavior