Justin
Dhillon
CS student at Western University, Software Developer Intern at IBM, shipping AI knowledge tooling and 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, achieving 97% accuracy, 30% throughput gain over baseline.
Ayori
Building an evidence layer for IBM Z teams that connects expert sessions, runbooks, and COBOL/JCL into a searchable knowledge graph. Retrieves relevant context for source-backed answers and declines to answer when evidence is missing.
JStack
Currently building a portable collection of Markdown skills for coding agents: planning, critiquing plans, implementing changes, and reviewing code. The same workflow works across Claude Code, Codex, and IBM Bob.
Shrek's Swamp
Full-stack Java desktop game with MVC architecture and a 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, all 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, producing a 15% accuracy gain and 30% faster training.
Experience
Software Developer Intern
IBM · Markham, ON
- Delivered 3 merged pull requests and opened 5 additional pull requests across two internal web apps during my first month.
- Shipped profile and access-control improvements for an internal support platform, linking people across 11 UI locations and standardizing role labels, avatars, and product visibility.
- Expanded profile workflows with access-filtered ticket metrics, pagination, filtering, sorting, membership details, and administrative actions across the web and API layers.
- Diagnosed and resolved a grading-job timeout caused by inconsistent missing-answer handling and a race in background status updates; 703 tests passed.
- Reproduced Android WebView upload failures in an emulator and validated a targeted fix that restored document uploads while continuing to reject unsafe file types.
Software Engineer Intern
Sun Life Financial · Toronto, ON
- Developed and shipped an internal AI knowledge-capture platform preserving institutional knowledge from 5+ developers across 30+ completed projects.
- Extended an open-source Zowe MCP server for Sun Life's environment, adapting mainframe operations for LLM-powered developer workflows.
- Designed an AI initiative evaluation system presented at Sun Life's 2026 internal hackathon; AI leadership identified the concept for potential internal implementation.
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 for 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, achieving 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, including 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 Winter 2027 and Summer 2027 internships in software engineering, AI/ML, or backend systems. If you have an interesting role, I'd love to hear about it.
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