Jon Chan Email & Phone Number

Greater Toronto Area, Canada

• Freelance work / non-OSS projects::
• hsa-db: a web-scraping + quant calculation + database tool for large stock market datasets from BlackRock and Yahoo Finance. Stack: Python, BeautifulSoup4, NumPy, SQLite
• discord-role-inviter-bot: a Discord bot that parses a spreadsheet of user data, then sends out unique (single-use) Discord invites directly into specific server roles. Stack: Node, discord.js, SheetJS, Nodemailer
• music-revision: batch music file operations. Trims blank audio from ends (i.e., beginning and end) of songs, adds volume gain tags, and sets normalized filenames and metadata based on acoustic fingerprints. Stack.
• surge: a Chromium browser extension with a modular system containing various independent web+browser automation and media functionalities. Stack: Vite, Chrome MV3 API, JavaScript, Firebase, Node, Express, Playwright.
• linkedin-post-comment-gen: a Chromium browser extension that uses a LLM to auto generate comments for posts using post content and metadata, and allows editing/posting them within the native LinkedIn UI. Stack: Vite.

Toronto, Ontario, Canada

• Implemented e-commerce platform APIs using Node, Express, Ramda, SQL, and OpenAPI specification
• Worked on product info content generation feature using Node, SQL, ChatGPT API, and BullMQ
• Scaled monolithic features by converting them into AWS serverless pipelines using AWS SAM, S3, SQS, EventBridge, SFN+ASL, Lambda, ElastiCache Redis, and RDS PostgreSQL
• Worked on serverless pipeline task progress tracking system using Node, SQL, SSE, and Svelte
• Implemented custom real-time data validations in a 3rd party embeddable spreadsheet importer using Node, Express, SQL, and OneSchema
• Implemented Figma designs into e-commerce platform frontend and HTML email templates using Svelte and MJML

Greater Toronto Area, Canada

• Designed and implemented multiple full-stack responsive SPA web apps, E2E, using Node, Express, Python, Java, Svelte, Bootstrap, SQL, Firebase, and 3rd party APIs, serving 200k+ requests monthly
• Implemented operation queuing system using WebSockets and Promises after load/stress testing, optimizing resource usage and completely eliminating server overloads from parallel operations
• Implemented OAuth2 user login using Passport and automatic email sending/verification system using GCP Gmail API, Nodemailer, and WebSockets
• Converted vanilla JavaScript and Handlebars frontend to the Svelte framework
• Ported Firebase-based core app to a SQL-based version for end users to self-host; from identifying the requirements comprehensively to implementing transformative changes in the backend and frontend, containerizing the.
• Wrote flexible SQL queries in Node which accepted variable amounts and/or values of parameters, queries dealing with string vectorization for full-text search, and query functions that handled extremely large datasets.

Hbsc, Computational Cognition, Computer Science, Statistics

High School Diploma

• Undergrad Award in Tech Ed • Undergrad Award in Biology • Coach for Junior Badminton Team • Violin player in Strings • Vending machines.