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AI & Data Science Manager · Full-Stack ML Engineer · Available for Select Consulting

Building Production AI, Forecasting Systems, and Scalable Data Products

Hi, I'm Mark—an AI & Data Science Manager and Software Developer. I architect machine learning pipelines, demand-forecasting engines, and full-stack applications that drive commercial decisions.

About Me

Python
SQL
Databricks
Next.js
Streamlit
C++

Production Tech Stack

End-to-end toolkit for machine learning, cloud data pipelines, and full-stack web applications.

Algorithmic Engineering

1,400+ problems solved on Codeforces & AtCoder · Google Code Jam & Meta Hacker Cup Round 2 Finalist · ASEAN Data Science Explorers 2nd Place.

Available for select freelance, consulting, and technical advisory engagements.

Need an AI, forecasting, or full-stack solution?

markkevin.ongyiu@gmail.com

My Work Experience

Research and industry leadership in statistical modeling, machine learning, and commercial data infrastructure.

AI & Data Science Manager at Philippine Batteries Inc. (Ramcar)

AI & Data Science Manager

Philippine Batteries Inc. (Ramcar)Aug 2024 – PresentPromoted to Manager: Aug 2026

Sole data leader for the North America division (promoted from Data Scientist in August 2026), architecting commercial and logistics data infrastructure. Engineered machine learning demand-forecasting models, automated multi-source data pipelines, and built internal full-stack applications (Databricks, Streamlit) to optimize inventory planning and streamline operational decision-making.

Research Intern at Nara Institute of Science and Technology (Japan)

Research Intern

Nara Institute of Science and Technology (Japan)Jan 2024

Conducted macroeconomic nowcasting on GDP using Dynamic Factor Models (DFM) in the Mathematical Informatics Lab, evaluating the impacts of applying advanced regularization techniques (including L1 and L2 regularization) on model accuracy and stability.

Featured Projects & Research

Selected open-source web applications, machine learning research, and systems software.

Explore all 4 projects
Computer Vision · Client-Side AI

Hand Pose Studio

An interactive web application for real-time 3D hand pose estimation and gesture tracking. Runs client-side neural network models directly in the browser with hardware acceleration for high-throughput, low-latency inference.

TypeScriptComputer VisionTensorFlow.jsWebGLGesture Recognition
Systems & Programming Languages

KalamanC

A custom programming language and interpreter engineered from scratch in modern C++. Features an end-to-end compilation pipeline including lexical tokenization, recursive-descent parsing, AST construction, and an evaluation runtime.

C++ParsersASTInterpretersLanguage Design+1 more
Machine Learning · Healthcare ResearchPresented at ICOAIMS 2023 (Malaysia)

Childhood Undernutrition ML Classification

Applied gradient-boosted decision trees (XGBoost), deep neural networks, and synthetic oversampling techniques to classify undernutrition status among school-aged children in the Philippines. Presented at the 4th International Conference on Artificial Intelligence and Data Sciences (ICOAIMS 2023) in Kuantan, Malaysia.

PythonXGBoostNeural NetworksOversamplingHealthcare AI+1 more
Presented at ICOAIMS 2023 (Malaysia)
Econometrics · Statistical ModelingNAIST Mathematical Informatics Lab (Japan)

Macroeconomic GDP Nowcasting with Dynamic Factor Models

Developed high-dimensional Dynamic Factor Models (DFM) for real-time macroeconomic GDP nowcasting at the Nara Institute of Science and Technology (NAIST) in Japan. Evaluated the impact of L1 (Lasso) and L2 (Ridge) regularization on latent factor estimation accuracy and forecast stability.

RPythonDynamic Factor ModelsL1/L2 RegularizationTime Series+1 more