PORTFOLIO / 2026

Jaycen John
C. Carreon.

Computer Science Student Aspiring Software Developer

I like turning practical problems into software people can use. My projects include web applications, everyday tools, and research in lossless file compression.

HOLY ANGEL UNIVERSITYPHILIPPINES
Formal portrait of Jaycen John C. Carreon
JAYCEN CARREONCOMPUTER SCIENCE / 2026
SELECTED PROJECTSSCROLL TO EXPLORE

01 / THE WORK

Ideas made useful.

These projects range from a thesis compression system to tools for training, sales, and daily operations.

ByteSize guest compression workspace with file chooser and method optionsLIVE APP SCREENSHOT
FEATURED / 2026THESIS PROJECT

ByteSize

Adaptive File Compression System

Research and software for lossless compression and decompression. The system analyzes recurring patterns, builds an encoded file, and verifies that restoration matches the original bytes.

My contribution: I helped build the Python and C++ compression engine and the Flask interface for compression, restoration, and verification.

PythonC++FlaskSQLite
HoopRoutine Today page with workout and drill guidanceACTUAL APP SCREENSHOT
FEATURED / 2026LIVE APPLICATION

HoopRoutine

Basketball Training & Performance Tracker

A training app for planning workouts, recording drills and sessions, and reviewing progress. Players can choose preset routines or build their own.

My contribution: Designed and built the original React, Express, and PostgreSQL foundation. I directed, reviewed, and tested later AI-assisted features.

ReactExpressPostgreSQLVite
2026LOCAL MVP

InsightFlow

Sales Data, Clearly Explained

A local analytics app that imports CSV and Excel sales data, validates and maps columns, and turns them into filtered views of revenue, products, customers, and orders.

My contribution: I built the application structure, import and validation flow, and analytics dashboards.

ReactTypeScriptFastAPIPostgreSQL
2026LOCAL APPLICATION

CanteenCounter

A Fast Canteen Register

A local point-of-sale prototype for recording orders and viewing end-of-day totals. Confirmed orders queue in the browser during a network interruption and sync when the server returns.

My contribution: I built the register interface, local order API, and admin summary.

ReactExpressSQLite
2026BROWSER APPLICATION

Shoe Mileage Monitor

A Simple Basketball Gear Tracker

Logs play sessions for each pair of shoes, totals usage hours, and shows a rule-based wear reminder. Data stays in the browser on that device.

My contribution: I built the HTML and CSS interface and JavaScript tracking logic.

HTMLCSSJavaScript

EARLIER WORK

Where the foundations grew.

01 / 2024

Sneaker's Haven

A multi-page sneaker and apparel catalog built as an early web design project. It presents products and categories; it does not process purchases.

HTMLCSS
↗
02 / 2024

Hotel Room Rates

A Java coursework exercise using classes, inheritance, input validation, and custom exceptions to calculate room and suite rates.

JavaObject-oriented programming
LOCAL COURSEWORK

02 / ABOUT ME

Curious about the
whole process.

I’m a fourth-year Computer Science student at Holy Angel University. I enjoy turning an early idea into a tool someone can use, from its interface and application logic to the details that make it dependable.

My projects include Java coursework, a basketball training app, tools for small businesses, and lossless compression research. Each has helped me practice a different part of software development.

Let's work together

03 / TECHNICAL SKILLS

Tools I’ve used.

Languages and technologies represented in my coursework and projects.

01

Languages

PythonJavaJavaScriptC++SQLHTMLCSSTypeScript
02

Frameworks & runtime

ReactFlaskFastAPIExpressNode.js
03

Databases & tools

PostgreSQLSQLiteVisual Studio CodeGitGitHub

04 / EDUCATION

Still learning.
Always building.

2023 — PRESENT

Holy Angel University

Bachelor of Science in Computer Science

Fourth-year student · Expected graduation 2027Dean’s List · 2nd year, 1st semester (2024)Dean’s List · 3rd year, both semesters (AY 2025–2026)
2021 — 2023

St. Nicolas College of Business and Technology, Inc.

Senior High School Diploma · STEM Strand

Consistent Honor Student · Grade 11 (2021–2022) and Grade 12 (2022–2023)

PROFESSIONAL SKILLS

Problem solving & debuggingTeamwork & communicationTechnical documentationTime management & adaptability

05 / CONTACT

Let's make
something useful.

I’m interested in opportunities to learn, contribute, and build good software with a team.