Cover Photo

JOHN JESTER HAGUPIT SALEN

Web Developer Embedded Systems App Developer

Bridging the Gap Between Digital & Physical

Web Development, Mobile Apps, and IoT. I deliver seamless, high-performance solutions that bridge the gap between software and hardware.

THE STORY BEHIND JOHN JESTER SALEN

My mission is to deliver comprehensive solutions that are beautifully designed, efficiently coded, and physically intelligent.

My development journey began on Java Console programming, which instilled a deep understanding of core programming logic, algorithms, and efficient code architecture. This foundational discipline is the backbone of every project I undertake. I expanded this logic into the functional domains of Web Development and Mobile Application Development , focusing on creating seamless user experiences. Finally, my curiosity led me to Embedded Systems and IoT, completing the spectrum.

ACADEMICS

BACHELOR OF SCIENCE IN COMPUTER SCIENCE

MAGNA CUM LAUDE

  • 2 Consecutive Best Software Developer
  • 2 Consecutive Computer Programmer of the Year
  • 2 Consecutive Team Leader Awardee

ELECTRONIC PRODUCT ASSEMBLY AND SERVICING

EPAS NCII PASSER

COMPUTER SYSTEM SERVICING

CSS NCII PASSER

AWARDS AND RECOGNITION

WORLDSKILLS COMPETITION

WEB TECHNOLOGIES

Gold Medalist

Provincial Level

Gold Medalist

Regional Level

6th Place

National Level

ELECTRONICS

Gold Medalist

Provincial Level

Gold Medalist

Regional Level

Gold Medalist

National Level

Philippine Representative

ASEAN Level

PROJECTS

I build things that connect the physical world to the digital one.

Turning ideas into working prototypes — from sensors and circuits to full-stack apps and cloud-connected devices.

POULTRY MANAGEMENT SYSTEM

A complete IoT solution for modern poultry farming: real-time monitoring of water levels, feed schedules, temperature/humidity sensors, and remote control via a cross-platform mobile app. Keeps birds healthy and reduces manual labor.

IOT

APP

FIREBASE

FISH MONITORING SYSTEM

A comprehensive solution for modern fish farming: real-time monitoring of water quality (pH, temperature, dissolved oxygen, turbidity), automated feeding schedules, and remote management through a mobile app. Improves fish health, reduces mortality, and optimizes resource usage.

IOT

APP

FIREBASE

AGRICULTURE MONITORING SYSTEM

A complete IoT solution: real-time monitoring of temperature, humidity, water levels, feed, and air quality, with automated controls and mobile app alerts to maintain optimal conditions.

IOT

APP

FIREBASE

JSAFE SMS PHONE LOCATOR

A lightweight, no-internet-required phone locator that uses simple SMS commands to track location. Ideal for lost phones, family safety, or vehicle tracking. Works offline via GSM/SMS network — perfect for rural areas or low-data situations.

IOT

APP

MEDAPP

A user-friendly cross-platform app that helps patients stay on top of their medications. Features customizable schedules, local alarms/notifications, dosage tracking, refill reminders, medication history logs, and family sharing options. Simple, reliable, and completely offline-capable — perfect for daily health management without any hardware.

IOT

APP

EARTHQUAKE MONITORING SYSTEM

An off-grid IoT device for detecting earthquakes using sensitive accelerometers. Powered by solar panels and DC backup, it triggers immediate local alerts via buzzer and siren. Data (vibration intensity, timestamps) is transmitted to a web app for recording, visualization, and historical analysis — ideal for remote areas or early warning systems.

IOT

TELL NO ONE

A privacy-focused web platform where users create a personal link to receive fully anonymous messages, questions, or confessions. No login required for senders — just visit the link and type away. Perfect for honest feedback, fun Q&A, secrets, or social media stories. Messages are stored securely, with moderation tools to filter spam/toxicity.

WEB

EXPRESS JS

MONGGO DB

MABINI INVENTORY SYSTEM

A full-featured inventory system designed for efficient tracking of products, stock levels. Includes real-time dashboards, low-stock alerts, transaction history, user roles, and reporting tools.

WEB

EXPRESS JS

MONGGO DB

LGU CMS

A custom-built CMS website for a Local Government Unit of LABO CAMARINES NORTE. Features easy content updates for news, announcements, services, officials directory, transparency reports, events calendar, and citizen feedback forms. Admin dashboard allows non-technical staff to manage pages, upload documents, and publish updates quickly — promoting transparency and better community engagement.

WEB

WORDPRESS

MYSQL

LGU MAIN SYSTEM

A centralized web-based system that enables LGUs to monitor, manage, and streamline key operations across departments. Features real-time dashboards for tracking projects, budgets, services, citizen requests, compliance reports, and performance metrics. Includes role-based access for officials and staff, document management, transparency tools, and reporting — empowering efficient governance and data-driven decision-making.

WEB

DJANGO

MYSQL

Get in Touch

Have a project idea, collaboration opportunity, or just want to say hello? Feel free to reach out—I'm always open to interesting conversations.

Send Me a Message

Messages are sent directly to my inbox via Formspree (free & secure). No spam, I promise.

Reach Me Directly

👨‍💻 I'm most responsive on email and Facebook Messenger.

Expect a reply within 24–48 hours!