Christopher Lim — Portfolio

01. Experience

Two Sigma

Incoming SWE Intern

Jun 2026 – Aug 2026 · New York, NY

Excited to explore quantitative finance this summer.

Incoming

Stripe

SWE Intern

Jan 2026 – May 2026 · San Francisco, CA

Publishing a new feature to update customer information during checkout sessions to production for 100k+ users. Building concurrent, high-throughput, low-latency APIs handling $6B+ volume in Stripe Payments. Storing, verifying, and fetching sensitive customer and merchant data in SQL relational databases.

Ruby SQL APIs Payments

Amazon Web Services

SDE Intern

Sep 2025 – Nov 2025 · Seattle, WA

Publishing a new EBS cloud archive service to production for 100k+ users. Designed a distributed transaction metering system to generate customer bills from real-time EBS usage data. Developed an alarmed testing framework monitoring EBS copy, archive, and restore across 30+ regions. Proactively fixed critical bugs including a KMS race condition and stuck backup jobs. Published 50+ code reviews, 10k+ lines of code, 3 design docs, and 100% unit test coverage.

Java Distributed Systems EBS Billing

Capital One

SWE Intern

Jun 2025 – Aug 2025 · McLean, VA

Published a feature to reserve workspaces in Capital One Cafés for 35k+ mobile app customers. Integrated cross-platform features in large Swift and Kotlin codebases for iOS and Android. Collaborated with design and product to translate Figma designs into production-ready UI. Self-initiated a second project: an AI chatbot to find ATMs, check balances, and initiate deposits.

Swift Kotlin iOS Android

02. Projects

3D Physics Engine

An interactive real-time environment allowing users to launch and rotate thousands of objects. Implements advanced collision detection using spatial partitioning trees and linear programming.

C++ OpenGL Simulation

Bible Verse Generator

A from-scratch transformer model that generates original Bible verses or continues stories in biblical style. Designed and trained end-to-end using the full text of the Bible — not a ChatGPT wrapper.

Python PyTorch NLP

Aaushi.info

Modernized an outdated backend architecture and UI to the Wikipedia stack with safe data migration. Built a diagnostic system that identifies diseases from patient records using a medical relational database.

Lisp PHP Python

03. About Me

Hello! I'm Christopher, a junior at the University of Maryland pursuing an Honors BS in Computer Science & Mathematics with a 3.95 GPA. My coursework spans algorithms, real analysis, quantum computing, and advanced numerical optimization.

I've had the privilege of interning at Capital One, Amazon Web Services, and Stripe, with Two Sigma coming up next. I love working on systems that operate at massive scale — from distributed billing pipelines processing real-time cloud usage, to concurrent payment APIs handling billions in volume.

Here are some technologies I've been working with recently:

Python
Java
Ruby
C / C++
JavaScript / TypeScript
SQL
AWS
PyTorch

Christopher Lim.

I build things that scale.