Kenny Leong

Software engineer and founder based in New York City

💻 Work Experience

Full Stack Software Engineer @ Altus Marketing LLC (Apr 2022 - Present)
Entrepreneurial experience in software engineering

Delivered exceptional revenue growth of more than $750,000 by leveraging API integrations and e-commerce optimization
Built and deployed web applications for 5+ local businesses, resulting in increased online visibility and customer engagement
Developed a Python script to automate CSV data aggregation, saving an estimated 50 hours of manual work annually
Utilized PostgreSQL to efficiently handle and manage data for a high traffic client with 10,000+ monthly active users
Integrated Express.js for handling 500+ RESTful requests per day, ensuring smooth server interaction and data manipulation
Established a CI/CD pipeline using GitHub Actions, reducing deployment time by 50% and improving team productivity
Adopted Sequelize for Object Relational Mapping (ORM) to define database models that map specific resources in REST API
Optimized application performance through lazy loading and pagination, resulting in a 30% decrease in page load time
Engineered reusable React components for a 20% decrease in development time and increased code maintainability
Implemented input validation and parameterized queries, eliminating the risk of SQL injections and XSS attacks
Incorporated JSON Web Tokens (JWT) for 3 layers of authentication to verify user identities and prevent security vulnerabilities
Technologies used: Sequelize.js, JavaScript ES6, React, TypeScript, Redux, Next.js, REST, Jest, Mocha, Cypress, Python, and Express.js.

Full Stack Software Engineer @ Freelance (July 2019 - Feb 2022)
Entrepreneurial experience in software engineering

Implemented client-side routing using React Router, resulting in improved navigation flow and a 15% decrease in page load times
Collaborated with designers and stakeholders to translate business requirements into technical solutions, delivering projects within budget and strict timeline constraints
Incorporated SEO best practices, resulting in a 70% increase in organic traffic and got client ranked first on Google search results
Integrated third-party APIs and payment gateways into React applications, increasing revenue by 15% for e-commerce clients
Developed a dynamic multi-step form using React Hooks, resulting in a 20% decrease in user drop-offs and higher engagement
Built authentication and protected routes using React Router and JWT tokens to prevent unauthorized access from external parties
Developed an automated email marketing system, resulting in a 25% increase in customer retention and the generation of an additional $50,000 of revenue annually
Designed and developed a user-friendly React-based dashboard to achieve higher responsiveness and increased user satisfaction
Utilized Redux in React app for state management, improving application performance and reducing data fetching time by 40%
Integrated third-party APIs and payment gateways into React applications, enabling seamless transactions and boosting revenue
Technologies used: Flask, JavaScript, React, TypeScript, Redux, Next.js, REST, Jest, Mocha, Cypress, Python, and Express.js.

Full Stack Web Application @ Threadit (Project)
Content sharing and discussion platform.

Implemented a RESTful API using Flask in order to provide a scalable and maintainable web interface for the application
Integrated SQLAlchemy and PostgreSQL for efficient data storage and retrieval for enabling smooth database management
Leveraged Werkzeug for request handling and middleware management, resulting in a 40% improvement in processing time
Utilized React’s virtual DOM and Redux’s predictable state container to efficiently manage and update the application’s UI
Built React-Router to manage client-side routing, enabling seamless navigation across 15 unique URLs within the application
Technologies used: Python, Flask, React, JavaScript, PostgreSQL, Redux, HTML, CSS, and SQLAlchemy.

Full Stack Web Application @ Phantasmal (Project)
Chat application with real-time messaging

Improved user experience (UX) through WebSockets, supporting concurrent chats with sub-second message delivery
Led a team of 3 developers using Git, collaborating on a codebase with 20,000+ lines of code, ensuring efficient version control
Utilized WebSockets for real-time communication, handling hundreds of messages per second with an average latency of 100 ms
Reduced query times to database from 6,000 ms to 12 ms through the use of aggregator functions and indexing foreign keys
Worked in Scrum environment with stand-ups, sprints, and task estimations, delivering 30 features within strict project deadlines
Technologies used: Flask, React, Python, Redux, WebSockets, JavaScript, SocketIO, HTML, CSS, and SQLAlchemy.

🇺🇸 English: Native
🇨🇳 Mandarin: Native
🇨🇳 Cantonese: Native
🇰🇷 Korean: Professional Working Proficiency

App Academy 24-Week Intensive Fullstack Engineering Bootcamp
App Academy - Remote (2022 — 2023)

Stanford University for Python
Code in Place - Remote (2020)

New York University in Economics
New York University - New York, NY (2015 — 2019)