Jemmuel T. Umali

Application Engineer Lian, Batangas, Philippines

Useful software, thoughtfully engineered.

Full-stack software engineer focused on ASP.NET Core and C#. I build secure web applications, REST APIs, and practical tools, with hands-on experience in Azure, Firebase, and modern front-end development.

Explore selected work Freelance projects
03 yearsprofessional experience
ASP.NET Core / C#primary focus
Azure / Firebase / AWS / Supabasecloud platforms
Cartoon portrait placeholder for Jemmuel Umali
Application Engineer
01 / What I bring

Strong fundamentals. A growing toolkit.

I work from the problem outward: understand the workflow, choose a sensible approach, then build software people can rely on.

01

ASP.NET Core & C#

C#, ASP.NET Core Web API and MVC, and REST APIs.

02

Web interfaces

React, Next.js, TypeScript, Tailwind CSS, and semantic HTML.

03

Cloud & data

Azure Functions, Web Apps, Storage, and DevOps; AWS and Docker (starting). Microsoft SQL Server, Firebase Firestore, Firebase Rules & Indexes, MongoDB, Azure Cosmos DB, and Supabase.

04

AI & emerging tech

AI integration, AI agents, agentic programming, and prompt engineering. Exploring Flutter.

How I use AI

A faster tool, not a substitute for engineering. I use AI to move faster during development, but I guide the solution, review suggestions, and test the code. AI supports my workflow; it does not replace my engineering judgment. I don’t vibe-code.

02 / Selected work

Small details. Real-world workflows.

From financial-services automation to point of sale and visitor check-in, I build around the needs of the people using the system.

Project 01 / Financial operations

Less manual work. Clearer flow.

Automation / OCR
Czarina Forex Exchange

Advanced automation system

Co-led development of an operations system with OCR-assisted customer ID detail capture and automated workflows to reduce manual data entry and processing errors.

  • ASP.NET 8 Core MVC
  • Azure
  • SQL
  • OCR
Project 02 / Operations

From stockroom to sale.

Inventory / Distribution
King Grain’s Bigasan · Parañaque

Point of sale & inventory system

A custom system created for King Grain’s Bigasan in Parañaque, bringing sales and inventory workflows into one practical business tool.

  • Point of sale
  • Inventory
  • Business system
Project 03 / Retail operations

A smoother daily close.

POS / Inventory
Double D’Brew · Langaray Branch

POS & inventory web app

Replaced manual processes with transaction handling, inventory tracking, and real-time Firebase synchronization. Added secure login with IP-based and time-based access controls.

  • Vue 3
  • TypeScript
  • Tailwind CSS
  • Firebase
Project 04 / AI integration

Spending insights, made personal.

ChatGPT-4 / Personal finance
College thesis project

Money management for college students

Co-developed a money-management app for college students and integrated ChatGPT-4 to generate personalized spending reports and actionable savings recommendations.

  • AI integration
  • ChatGPT-4
  • Prompt engineering
Project 05 / Visitor experience

A clearer arrival.

Digital logbook / Front end
Pernod Ricard Philippines

Digital visitor logbook interface

Co-developed the digital visitor logbook for Pernod Ricard Philippines, contributing the front end for visitor details, visit purpose, in/out times, and face capture during check-in.

  • Front-end development
  • Visitor check-in
  • Face capture
03 / Where I’ve been
Feb 2023 – Oct 2025

Software Engineer · Elyon Global Technologies Asia Inc.

Built web applications and APIs, contributed to the Czarina Forex Exchange automation project, and worked across .NET, Azure, SQL, and front-end technologies.

Recognition

AI & Agents · Tech Talks Session 1

PSIA Certificate of Participation · Achievement Award · Languages: English and Filipino

Freelance / Select projects

Have a workflow worth improving?

I also take on freelance work for businesses that need a clear, well-built website or a custom system that fits how their team operates.

From a simple web presence to an operational tool, let’s start with the problem your business needs to solve.

  • Business websites
  • POS systems
  • Inventory tools
  • Custom web apps
Email me about your project

0939 609 0612LinkedIn