Jeff (Boon Keat) Ong

Principal Full-Stack Software Developer

A Principal Full-Stack Software Developer with background in computer science and marketing communications, specializing in the development of meaningful AI-powered products. A proven leader in deploying cloud-native solutions to optimize performance, build client trust, and accelerate revenue.

Founding Engineer

ARCPX | Workflow Orchestrator

Building the next generation of workflow orchestration tools that empower teams to automate complex processes with AI-powered intelligence. Leading full-stack development, architecting scalable cloud infrastructure, and defining product vision from concept to deployment.

LLM Workflows Context Engineering Cloud Architecture

Experience

Principal Full-Stack Developer

Monks, Amazon, Meta | Toronto, ON | 2018 – Present
  • Designed and implemented scalable RESTful APIs and real-time features for high-traffic B2B applications
  • Championed the adoption of TypeScript and robust CI/CD pipelines to improve code maintainability and deployment velocity
  • Developed and shipped production-grade agentic applications (Python) at scale, ensuring high availability and performance
  • Optimized LLM performance, achieving a 20% reduction in latency and a 20% increase in accuracy through context-window optimization and prompt refinement
  • Streamlined CI/CD workflows by parallelizing application deployments, significantly reducing build times and operational overhead
  • Architected and developed knowledge graph retrieval systems, enhancing the accuracy and retrieval efficiency of RAG-based architectures
  • Hardened agentic application stability by implementing exponential backoff and retry mechanisms to ensure system resiliency
  • Strengthened LLM security posture by integrating pre-trained guardrail services to mitigate prompt injection and data leakage
  • Automated infrastructure management using AWS CDK and CloudFormation, enabling consistent and reproducible cloud-native environments
  • Contributed to the engineering and launch of global-scale web properties, including WhatsApp.com, about.meta.com, and projectaria.com at Meta.

Design Consultant (Contract)

Anomaly | Toronto, ON | Aug 2024 – Sept 2024
  • Launched a Telegram mini app
  • Designed user journey to enhance user engagement
  • Developed UI component library for rapid prototyping

Front-End Engineer (Contract)

MirrorMe3D | Toronto, ON | Feb 2019 – Oct 2023
  • Developed 3D scan analysis application for remote medical monitoring and diagnostics
  • Built interactive tools for analyzing pre- and post-operative facial 3D scans using WebGL, providing advanced visualization and data-driven insights.

Assistant Instructor (Contract)

Trilogy Education | Toronto, ON | Feb 2019 – Oct 2023
  • Tutored students in Web Development, Data Structures, and Algorithms, fostering a strong technical foundation

Web Developer

Cotton Candy | Toronto, ON | May 2018 – Oct 2018
  • Developed Shopify e-commerce themes and plug-ins
  • Awarded a long-term RFP to manage an e-commerce platform with integrated brand experience

UI Developer & Designer

Dig Insights | Toronto, ON | Mar 2017 – May 2018
  • Designed and developed data analysis platforms
  • Shipped scalable applications for sampling and analyzing user data

Front-End Developer

AutoTrader | Toronto, ON | Feb 2015 – Mar 2017
  • Developed e-commerce websites and CMS systems

Highlights

AWS agentic applications with real-time knowledge base

Engineered high-fidelity agentic applications on AWS using a GraphRAG architecture. By architecting a custom knowledge graph from unstructured data, I improved LLM response accuracy by 20%, providing the system with a contextually aware, real-time knowledge base that outperformed traditional vector-only retrieval.

WhatsApp.com migration at scale

Re-engineered Meta’s content management infrastructure, spearheading the migration of complex localized datasets from legacy systems. This architectural overhaul established a scalable foundation for global platform development and multi-region deployment.

AWS Conference

Spearheaded technical development for a humanoid robot featured at AWS re:Invent 2023.

Education

Computer Science

Ryerson (TMU) University, Toronto | 2018

UI Design

BrainStation, Toronto | 2017

Media Communications

Humber College, Toronto | 2014

Sound Engineering

Sound and Music Production, Toronto | 2011