Zun's Personal Page

About Myself

Working as a SDE at Amazon.com Digital-Storage team.

Well versed in all stages of Software Development Life Cycle including requirement analysis, design, development, testing, deployment and support.
Posed multiple publications while a research assistant for the Information Security Institute at Northeastern University.
Experienced with various methodologies such as Test Driven Development (TDD), Sprints, and Agile / SCRUM methodologies.
Product support, debugging field issues and product enhancement experience
Working experience using RESTful services and consuming web services with Java programming language.
Experience in RESTful API, JSON, XML, and DOM.
Hands on experience with version control tools such as JIRA, GitHub, GitLab.
Team player with exceptional planning and execution skills coupled with a systematic approach and quick adaptability.

Language: Java, C/C++, JavaScript, Python
Framework: Spring MVC, Spring Boot, Spring Data/Cloud, Angular5, Node.js, Bootstrap
Technologies: AWS, HTML/CSS3, SQL/MySQL, NoSQL, REST, Git
Knowledge: Design Patterns, OOP, Data Structure, Agile Development, Software Testing, Functional Programming, Database Management

M.S. in Computer Science @ University of Florida
Gainesville, FL, 08/2016~05/2018

B.E. in Information Security @ Northeastern University (CHN)
Shenyang, Liaoning, 09/2012~06/2016

Software Development Engineer @ Amazon.com, Inc.
Seattle, WA, 04/2019 - Present

Responsible for persisting all subscriptions (Prime membership, Music, Video etc.) across Amazon.
Responsible for persisting all digital orders (Kindle, Audible etc.) across Amazon.
Developing and maintaining large-sclare distributed transaction systems.

Full Stack Engineer @ Marlabs Inc.
Seattle, WA, 04/2019 - Present

Full-Stack development of RESTful APIs to SQL/MongoDB database, implemented customized security authentication to meet client’s requirements, developed front-end by using Node.JS, Angular 5, HTML, CSS3, Bootstrap.

AWS based Serverless Messager Application
Demo Link: https://chat.eastlife.me//

Implemented and deployed a serverless messager web application with AWS services.
Used JavaScript to dynamically modify webpages.
Used IAM to manage permissions and access policies.
Used AWS Lambda and API Gateway to manipulate and vend data in the cloud.
Used DynamoDB to store and retrieve data.
Used Cognito for user login system, and finally speed up with CloudFront CDN.

AWS based E-Commerce Store:

Implemented and deployed a No-SQL E-Commerce web application with AWS services.
Implemented real user email verification, shopping cart, PayPal checkout modules etc.
Used PHP language to modify webpages dynamically, AWS’s S3 to serve static resources.
Used DynamoDB to store and retrieve data and CORS to manage client-side security.
Used IAM to manage permissions and access policies.

Database Driven Web Application:

Implemented a Yelp like Web application basing on Yelp Open Dataset (1 million tuples).
Designed and implemented the user interface and constructed database schema from Entity-Relation Model.
Completed the web app with Angular5 for front-end and embedded SQL queries into Node.js for back-end.
Tested successfully with user login/registration module, advanced search module, comment module, statistical chart module etc.

3D Audio Interface:

Programmed by Java, JavaScript. Implemented a 3D audio interface which can produce 3D sound basing on users’ real-time motion and orientation towards sound source.
Used socket to fetch dynamic data from gyroscope and accelerator on android phone and do the convolution on server side with latency less than 1 second.
Implemented and tested successfully 8 different scenarios which could happen.

OpenGL 3D Face Recognition:

Implemented texture mapping, control mesh fit via ray casting function to a scanned 3D human head object.
Used surface rendering and subdivision to make it smoother and more accurate to get feature points.
Researched on complex situation of dynamic expressions