Hi, I'm Sean, welcome! 👋

I am a recent grad from McGill University, with a passion for building and learning new tools!

About Me

Hi, I'm Sean Li, a recent graduate from McGill University with a Bachelor of Science in Computer Science. Over the past few years, I've gained valuable experience as a software developer and data engineer intern, working on large-scale distributed systems and optimizing data-driven solutions for major financial institutions like CIBC and BMO. Whether it's building robust backend systems or developing intuitive full-stack applications, I love using technology to solve real-world problems.

Skills

Work Experience

Software Developer Internship @ CIBC

May 2022 - Aug 2022

Accelerated the launch and development of a large-scale distributed backend system for the CIBC Costco credit card, processing over 1 million transactions per month by utilizing Spring Boot and microservices architecture to ensure high availability and scalability.
Enhanced the digital transfers and fund relocation system by establishing Jenkins CI/CD pipelines, using Java, Spring/Spring Boot and Maven for streamlined builds, impacting over 1M+ users.
Analyzed and boosted critical financial transaction modules’ reliability by increasing unit test coverage from 20% to 85% using JUnit and Mockito.
Implemented comprehensive RESTful API documentation using Swagger, increasing developer onboarding efficiency and improving collaboration across development and QA teams.

Data Engineer Internship @ BMO

Jan 2021 - Aug 2021

Reduced PostgreSQL database data redundancy by 35% by optimizing database schemas and queries, enhancing data storage efficiency.
Developed SQL migration scripts, transitioning data from the old IDP database to a new cloud storage platform (AWS), achieving a 30% improvement in data processing speed and zero data loss.
Conducted System Integration Testing (SIT) and User Acceptance Testing (UAT) for BMO credit risk analysis, bolstering system security and reliability.
Spearheaded data migration and masking for the BMO Credit risk team, improving credit risk analysis for 7M+ users using SSIS and PostgreSQL (Netezza).

Projects

Tab.io

React Native

Firebase

Figma

JavaScript

Developed a bill-splitting mobile application. Utilized Figma for UI/UX design, constructed the front-end with React Native, and managed back-end and authentication with Firebase, and Google Cloud Vision to allow photos of receipts.

Algebriz

React

Node

Express

MongoDB

Socket.io

Managed a team of 3 and built the web design and functionality of a full-stack web application, a quiz game that supports real-time connectivity for 30+ players using Socket.io.

ilearnworld

HTML

CSS

JavaScript

MySQL

Led the development of a tutoring platform connecting 100+ students with 30+ recent graduates from top universities (e.g., Stanford, Yale) by utilizing JavaServer Faces (JSF), HTML, CSS, JavaScript, and MySQL for a full-stack, responsive web application.

BMO X Microsoft Hackathon Winner

PowerBI

PowerAutomate

Spearheaded a team of interns to develop a solution that reduced the auditing process by 2 hours per iteration, leveraging Power BI and Power Automate to streamline data reporting and workflow automation.