Justin
Dhillon
CS student at Western University shipping LLM tooling at Sun Life Financial, running fraud-detection on IBM Z at 10K+ TPS, and leading a 450+ student tech community.
Fraud Detection Accuracy
RiskGuard on IBM LinuxONE
Transactions / Second
Real-time on IBM Z
Event Attendance
Western Cyber Society
Students Mentored
IBM Z workshops
Tech Stack
Languages
Web & Backend
AI & Data
Infrastructure
Projects
RiskGuard
Real-time credit-card fraud detection deployed on IBM Z. Processes 10,000+ transactions/sec at sub-50ms latency. An ONNX-optimized LightGBM model trained on 590K transactions with 431 engineered features — 97% accuracy, 30% throughput gain over baseline.
Shrek's Swamp
Full-stack Java desktop game with MVC architecture — Swing frontend decoupled from a backend engine handling real-time pet state, inventory, and JSON persistence with parental time controls.
EcoCoin
TerraHacks full-stack app rewarding users with crypto tokens for attending eco-friendly events. Firebase + Firestore auth, Mapbox geolocation, Node.js API — built end-to-end in 24 hours.
DataQuest
ML pipeline on a 100K+ record financial dataset. Applied PCA, advanced feature engineering, and statistical outlier detection across 500K+ data points — 15% accuracy gain, 30% faster training.
Experience
Software Engineer Intern
Sun Life Financial · Toronto, ON
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 alerts — eliminating manual triage.
- Wrote post-deployment regression scripts that caught production-breaking regressions before they reached users.
- Collaborated with IBM engineers on Watsonx for Z integration for enterprise Gen AI rollout.
- Hands-on with IMS, JCL, REXX, COBOL, SQL, and DB2 — batch processing and performance tuning at scale.
IBM Z Student Ambassador
IBM · Western University
- Selected as one of IBM's campus representatives for enterprise computing and mainframe technologies.
- Built RiskGuard through the program — 97% fraud accuracy and 10K+ TPS on IBM LinuxONE.
- Ran hands-on workshops for 50+ students on COBOL, JCL, Python, and IBM Z fundamentals.
- Earned IBM Z Xplore Advanced certification; presented at IBM Toronto and the Toronto Tech Expo.
President
Western Cyber Society · London, ON
- 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 across all projects and partnerships.
- Organized flagship events — IBM Night, Recruit Ready, and a club-run career fair.
- Secured new sponsorships, expanding the network beyond IBM to include Sun Life Financial.
VP of IBM Technical
Apr 2024 – Apr 2025- Spearheaded IBM Night, introducing 100+ students to mainframe computing and driving a 40% increase in certification completions.
- Managed a team of 10 developers across 2 projects integrating REST APIs with Docker, DB2, and IBM LinuxONE.
Executive Advisor
Canadian Tech Summit · Western University
- Provided executive oversight for a 250+ attendee undergraduate tech conference.
- Organized sponsorships and managed speaker, venue, and day-of logistics end to end.
- Arranged post-event coffee chats between winning teams and company executives.
BSc Honours Computer Science
Western University · London, ON
Minor in Software Engineering
Let's Build
Something Together
I'm actively looking for Fall 2026 internships in software engineering, AI/ML, or backend systems. If you have an interesting role — I'd love to hear about it.
Say Hello →