Hi, I'm Jeffrey

Business Analytics Undergraduate

Specialising in Machine Learning

Passionate about developing data-driven solutions that solve real-world problems

Experience

Data Analyst Intern - Regional Marketing Analytics

May 2025 - Aug 2025

Shopee

Collaborated with CRM and business teams to build data pipelines and dashboards for marketing insights across 8 Southeast Asian markets. Developed ETL workflows using Presto, Spark SQL, and Apache Airflow to automate campaign reporting. Conducted A/B test backtesting and fraud detection analysis, successfully flagging >70% of negative GMV rounds.

Software Engineer Intern

Jan 2025 - May 2025

Qumo AI

Built onboarding flows and dashboards using Next.js, TypeScript, and Tailwind. Developed reusable UI components with validation and role-based access. Integrated FastAPI and LangChain with Google Vertex AI for thematic analysis on survey responses.

Software Engineer

Nov 2024 - Dec 2024

forYouths

Developed mentor and mentee onboarding flows using React and Next.js. Integrated Supabase for authentication and secure data storage. Enhanced UX with responsive layouts and accessible UI components.

Machine Learning Technical Analyst

Aug 2024 - May 2025

NUS Fintech Society

Built a feature-engineering pipeline using TF-IDF and campaign metrics. Deployed XGBoost model with 80% accuracy and feature-importance insights. Integrated real-time predictions into a React/TypeScript application.