Mar Jayson San Agustin

Software Developer | AI Integration

I help build incredible products and digital experiences for mobile and the web.

// About

In 2014, as a computer science student juggling a part-time gig in graphic design, I ventured into the world of desktop app design using Photoshop. Little did I know that this venture would serve as the catalyst for a profound shift in my career, leading me towards my true calling in programming and web development.

Today, I'm privileged to apply my skills across diverse projects, working with startups and established industry leaders, and this journey fuels my personal growth, reaffirming that coding applications is where I truly find my passion and fulfillment in the dynamic realm of software development and design.

When I step away from working, you'll frequently find me enjoying leisurely walks, engaging in online chess matches, immersing myself in enlightening documentaries. , and building exciting personal projects to solve personal and interesting challenges.

// Projects

  1. featuredUnionbank of the Philippines
    Website

    Unionbank of the Philippines is a leading financial services company in the Philippines. With Ascendion, I help the company build their web based features: suchs as time deposit, send international (SWIFT), credit cards management and application.

    ReactNextJSTypeScriptAgileScrum FrameworkJava
  2. featuredSHV Energy
    Website

    SHV Energy is a global company that provides energy solutions worldwide. With Merkle, I help the company migrate their legacy customer facing ecommerce platform to a modern solution

    ReactNextJSTypeScriptSitecoreStorybook
  3. featuredChloe by People Science
    Website

    Chloe by People Science is a platform that allows the company to study complex ideas, natural medicine, and wellness. With ISBX Philippines, I contributed as a software developer to deliver their data gathering engine using React Native, TypeScript, NodeJS and friends.

    ReactNextJSTypeScriptAgileScrum FrameworkJava
  4. featuredMyCure
    Website

    MyCure is a platform that streamline clinic operations with the enterprise-grade clinic management system. I help the team build their user onboarding integrated with analytics and payment processing. I also help them build their appointment booking system, HIPAA-compliance, virtual clinic, and patient portal.

    VueNuxtJavaScriptNodeJSStripeGoogle Analytics
  5. personalAI-Powered Chat Agent • Retrieval Augmented Generation (RAG)
    July 2024DemoGithub

    An opensource project I created showcasing a simple AI chatbot powered by vector embedding, ollama local models, shadcn, reactjs, and nextjs

    NextReactTypeScriptTailwindCSSshadcn/uiPlaywrightOllamaVector Embeddings
  6. personalTracker Apps • Habits, Spending and Workout Tracker
    August 2022Demo

    I have created and deployed a personal tracker system to track habits, spending, calorie intake and workouts. This system was inspired by Atomic Habits book. Perfect for anyone who wants to try `Identity-First` approach in habit building.

    ReactNextJSTypeScriptTailwindCSSShadcn/uiNestJSPostgreSQLTypeORMdrizzlebetter-authdigital-ocean
  7. personalTeam Collaboration Platform
    September 2023Github

    In my free time, with the help of an internet tutorial, I practiced my skills by creating this instant messaging platform, empowering users with seamless collaboration, secure file sharing, and dynamic video/audio messaging. With advanced member management, robust authentication, and customizable light/dark modes.

    ReactNextJSTypeScriptTailwindCSSshadcn/uiSocket.ioPrismaMySQL
More OpenSource Projects

// Experience

  1. Merkle
    July 2025 — Present

    Web Stack Engineer

    • Help with migration of e-commerce solutions with cutting edge technologies.

    • Resolving production bugs in migration.

    ReactJavaScriptTypeScriptNextJSSitecoreStorybookSCSS
  2. Ascendion (formerly Collabera Digital)
    Nov 2023 — June 2025

    Software Developer

    • Contributed to the development of a customized Grafana panel plugin using React, TypeScript and NodeJS for AI-powered insights of data projected at Grafana visualizations for our banking client: Metrobank Philippines.

    • Collaborated closely with cross-functional teams to develop various internal projects and proof of concepts using ReactJS, TypeScript and NextJS for our banking client: Metrobank Philippines.

    • Actively participated company-wide AI-powered features explorations such as retrieval augmented generation (RAG), vector embeddings, NextJS, ReactJS, and large language model utilization focusing on usage of transactional data and vast enterprise knowledge for our banking client: Metrobank Philippines.

    ReactJavaScriptTypeScriptFigmaMaterial DesignGrafanaAzure OpenAI
    Aug 2022 — Nov 2023

    Web Application Developer

    • Develop from scratch the web user interfaces and experience focusing on critical features such as time deposit, credit cards and send international (SWIFT) features for our banking client: Unionbank Philippines.

    • Resolved production bugs in credit cards and online transfers for our banking client: Unionbank Philippines.

    ReactJavaScriptTypeScriptFigmaAnt DesignAgileScrum Framework
Full Résumé