Open to Fall 2026 Internship

Justin Dhillon

$ ▌

CS student at Western University shipping LLM tooling at Sun Life, organizing events that pull 450+ students @ Western University, and building things that ship.

View My Work Download CV
Justin Dhillon
Python AI / ML Mainframe IBM Z
0%

Fraud Detection Accuracy

RiskGuard on IBM LinuxONE

0K+

Transactions / Second

Real-time processing on IBM Z

0+

Tech Summit Attendees

Canadian Tech Summit @ Western

0+

Students Mentored

IBM Z workshops at Western

My Toolkit

Tech Stack

Languages

Python Java JavaScript C++ SQL COBOL

Web & Backend

React Node.js REST APIs Firebase Docker

AI & Data

PyTorch TensorFlow Scikit-learn LightGBM ONNX Pandas NumPy

Infrastructure

IBM Mainframe AWS Linux Git Jira DB2 IMS
What I've Built

Projects

Featured Project GitHub

RiskGuard

Real-time credit card fraud detection pipeline deployed on IBM Z mainframe. Processes 10,000+ transactions per second with sub-50ms latency. Trained an ONNX-optimized LightGBM model on 590,540 transactions with 431 engineered features — achieving 97% detection accuracy and 30% throughput improvement over baseline.

97% Accuracy
10K+ TPS
<50ms Latency
30% Faster
Python LightGBM ONNX PyTorch Nvidia Triton IBM LinuxONE COBOL JCL
RiskGuard fraud detection system
🐸

Shrek's Swamp

Full-stack Java desktop game with MVC architecture — decoupling a Swing frontend from a backend engine handling real-time pet state, inventory, and JSON persistence. Dual-timer system + parental controls with time-based access enforcement.

JavaSwingMVCJSONJUnit
🌿

EcoCoin

Hackathon full-stack web app at TerraHacks rewarding users with crypto tokens for attending eco-friendly events. Firebase backend with Firestore + Auth, Mapbox geolocation, and Node.js API — built end-to-end in 24 hours.

ReactNode.jsFirebaseMapbox
📊

DataQuest

ML pipeline on a 100K+ record financial dataset. Applied PCA, advanced feature engineering, and statistical outlier detection across 500K+ data points — achieving 15% accuracy improvement and 30% faster training time.

PythonScikit-learnTensorFlowPandasPCA
Where I've Worked

Experience

Software Engineer Intern

Sun Life Financial  ·  Toronto, ON

May 2026 – Present
  • Just started — details to come as the role develops.

Mainframe Developer

May 2025 – Apr 2026
  • Built Python automation for SQL ERROR -905 timeout failures, auto-capturing failed statements and routing email alerts to submitting users — eliminating manual triage entirely
  • Wrote post-deployment regression scripts that caught production-breaking regressions before they reached end users
  • Collaborated with IBM engineers on Watsonx for Z integration to support enterprise Gen AI rollout across the mainframe platform
  • Hands-on with IMS, JCL, REXX, COBOL, SQL, and DB2 — applying batch processing and performance tuning at scale
PythonCOBOLSQLDB2JCLREXXIMSIBM z/OS

IBM Z Student Ambassador

IBM  ·  Western University

Apr 2024 – Present
  • Selected as one of IBM's campus representatives for enterprise computing and mainframe technologies at Western University
  • Built RiskGuard as part of the ambassador program, achieving 97% fraud detection accuracy and 10K+ TPS on IBM LinuxONE
  • Ran hands-on workshops for 50+ students covering COBOL, JCL, Python, and IBM Z fundamentals
  • Earned IBM Z Xplore Advanced certification and presented work at IBM Toronto and the Toronto Tech Expo
  • Directly contributed to members landing internship offers by presenting club work to IBM leadership and major Canadian banks
IBM ZIBM LinuxONECOBOLJCLPython

President

Western Cyber Society  ·  London, ON

Apr 2025 – Apr 2026
  • Led Western's largest student-run tech community to 450+ event attendance across the year
  • Managed an exec team of 8 and a $10K annual budget, overseeing all projects, partnerships, and club direction
  • Organized flagship events including IBM Night, Recruit Ready (resume and interview prep), and a club-run career fair — driving consistent student turnout throughout the year
  • Secured new sponsorships and partnerships, expanding the club's industry network beyond IBM to include Sun Life Financial
  • Connected members directly to industry opportunities, contributing to multiple internship offers through direct exposure to company representatives

VP of IBM Technical

Apr 2024 – Apr 2025
  • Spearheaded IBM Night, introducing 100+ students to enterprise mainframe computing and driving a 40% increase in certification badge completions
  • Led hands-on workshops for 50+ students on COBOL, JCL, and IBM Z fundamentals
  • Managed a team of 10 developers across 2 large-scale projects integrating REST APIs with Docker, DB2, and IBM LinuxONE
LeadershipIBM ZDockerDB2REST APIs

Executive Advisor

Canadian Tech Summit  ·  Western University

Sep 2025 – Mar 2026
  • Provided executive oversight for a 250+ attendee undergraduate tech conference at Western University
  • Organized sponsorships, coordinated day-of event logistics, and managed speaker and venue planning end to end
  • Arranged post-event coffee chats between winning teams and company executives, creating direct industry access for students
LeadershipEvent OpsSponsorships

BSc Honours Computer Science

Western University  ·  London, ON

Expected April 2028

Minor in Software Engineering

What's Next?

Let's Build Something

I'm actively looking for Fall 2026 internship opportunities in software engineering, AI/ML, or backend systems. If you have an interesting role or project — I'd love to hear about it.

Say Hello →
LinkedIn ↗ GitHub ↗ Resume ↗