Liujie (Jacky) Hao

About

Hi! My name's Jacky and I'm a finance nerd turned software engineer. Some of the things I love: spending the whole day hiking the Sedona Red Rocks, cooking up a hot bowl of beef noodle soup on a chilly night, playing a few sets of tennis on the local hard courts, and breathing life into an imagination by building a full-stack web application using React, Redux, PostgreSQL, and Express / Flask. Let's solve some big problems together, or just talk hobbies!

Check out my resume here.

Contact me at jacky.hao18@gmail.com

Skills

• JavaScript
• Python
• PostgreSQL
• React
• Redux
• Express
• Sequelize
• Flask
• SQLALchemy
• Node.js
• HTML / CSS
• Docker
• Git

Projects

Leverage is a Robinhood-inspired web application in which users can trade stocks alongside their friends.

• Integrated an external financial data API, IEX Cloud, to fetch JSON-encoded responses for populating stock and company details in order to provide users with up to date asset and portfolio value information.
• Designed a backtracking algorithm to backfill historical stock price data during periods of stock and market inactivity in order to render seamless time series data utilizing Recharts, a React charting library.
• Established a self-referential many to many relationship in the SQLAlchemy object-relational mapper to create association tables for capturing the social features of the application, such as friends and friend requests.

Whereabouts is a choose-your-adventure web application in which users can explore and share about randomly generated locations.

• Utilized the Google Maps API in conjunction with a geographical coordinate randomization algorithm to present users with maximum radius bound locations to visit and share with their followers.
• Connected the Flask backend to AWS S3 for photo storage and organization to manage user image uploads, reduce server loads, and enhance scalability.
• Normalized state shape in Redux and used slice reducers to organize the state tree to more intuitively dispatch thunks to render data on the frontend.

Court Reserve is an Airbnb-inspired web application for booking tennis courts to allow users to play when and where they want.

• Implemented a search feature using Redux and database query operations in the Sequelize object-relational mapper to allow users to filter for tennis courts in their particular cities.
• Secured user permissions through the use of JSON Web Token-based authentication and custom middleware functions to verify user identity.

Contact

• AngelList
• LinkedIn
• GitHub

Elements

i = 0;

while (!deck.isInOrder()) {
    print 'Iteration ' + i;
    deck.shuffle();
    i++;
}

print 'It took ' + i + ' iterations to sort the deck.';