Sajed Lopez Mendoza

Technologies

Frontend Development

Backend Development

Python

PHP / Laravel

PHP / Native

Java

REST API

Node.js(Express)

.NET

C++

C#

Flask

Software / Applications

Android Studio

Mobile development IDE

EEZ Studio

UI dev for Capacitive LCD

Nextion Editor

UI dev for Nextion LCD

PyCharm

Python IDE

Fritzing

Circuit prototyping tool

VS Code

Web and general coding IDE

Arduino IDE

Microcontroller programming

Visual Studio

Desktop and .NET development

NetBeans

Java development IDE

Fusion 360

3D modeling & printing

Label Studio

AI data labeling tool

LabelImg

Image annotation tool

Thonny IDE

Python IDE for Raspberry Pi

RealVNC

Remote desktop control

Machine Learning / AI

Computer Vision

Object Detection: YOLO, TensorFlow models

Image Segmentation: YOLO

Face Recognition: Haar Cascades, FaceAPI, Dlib

OCR: Tesseract, EasyOCR

Deep Learning

Frameworks: TensorFlow, PyTorch

Architectures: CNNs, RNNs

ML Models

Scikit-learn: Classification, regression

Random Forest: Ensemble modeling for structured data

Linear Regression: Predicting numeric trends

Microcontrollers / Boards

Arduino

ESP8266 / ESP32

Raspberry Pi

Databases

MySQL

SQLite

Firebase

MongoDB

DevOps / Protocols

SSH
Git
WebSocket

Projects

Solar Calculator
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Solar Calculator

<p>Engineering-grade solar system calculator designed for professionals, installers, and advanced users. Supports Grid-Tied, Off-Grid, and Hybrid systems with real-world calculations and safety-first design principles.</p>

Next.jsReactTailwindVercelTypeScript
Live Demo
Smart Cabinet
View Photos (1)

Smart Cabinet

<p>An advanced IoT-enabled secure storage solution with fingerprint authentication and automated mechanisms.</p>

C++ESP-NowArduino IDE
View on GitHub
ToolEase
View Photos (12)

ToolEase

A modern, open-source RFID-based tool leasing and inventory management system for educational, industrial, and makerspace environments.

C++FlutterESP32
View on GitHub
IoT Rice Dryer
View Photos (13)

IoT Rice Dryer

IoT-enabled Rice Dryer system with ESP32 hardware and Android application for remote monitoring and control via Firebase Realtime Database.

C++Android StudioArduino IDEESP32ESP8266FirebaseKotlin
View on GitHub
IoT Smart Fan
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IoT Smart Fan

SmartFan is a comprehensive IoT ecosystem that transforms any standard stand fan into an intelligent, automated climate control system. Built with a dual-ESP architecture (ESP8266 + ESP32) and a modern Android app, it delivers seamless temperature-based automation, real-time monitoring, and cloud integration.

C++JavaAndroid StudioArduino IDEESP32ESP8266
View on GitHub

CNC Jog Trainer

CNC machine training and control system featuring Arduino-based hardware control and Raspberry Pi GUI interface. This project combines robust stepper motor control, limit switch monitoring, and a modern touchscreen-optimized graphical interface for educational and practical CNC operations.

PythonGRBLCustomTkinterArduinoC++
View on GitHub
Creative Gallery
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Creative Gallery

Art and creative portfolio gallery

LaravelPHPBladeHTML5MySQLBootstrap
View on GitHub

Child Presence Detection Alert

AI-powered child detection system

JavaAndroid Studio
View on GitHub

Laong Laan

Heritage / cultural project

JavaAndroid Studio
View on GitHub
Ammonia Auto Control
View Photos (4)

Ammonia Auto Control

Automated ammonia monitoring system

C++LaravelESP32BootstrapFirebase
View on GitHub

Smart Water Guard

Smart water monitoring IoT device

JavaAndroid StudioFirebase
View on GitHub
I Buy It
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I Buy It

E-commerce shopping application

PHPLaravelJavaAndroid Studio
View on GitHub
Baby Cradle
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Baby Cradle

Smart baby cradle IoT project

JavaAndroid StudioFirebase
View on GitHub
Blood Reserve
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Blood Reserve

Blood bank reserve management system

LaravelBootstrapMySQL
MindBlessed Online Clothing Store
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MindBlessed Online Clothing Store

E-commerce clothing store

PHPBootstrap

Dataset Fixer

Tool for fixing and cleaning datasets

Python
View on GitHub

Soil Tester

IoT-based soil testing system

JavaAndroid StudioFirebaseOpenAI API
View on GitHub

Educational Assessment

Assessment platform for education

LaravelPHPMySQLface-api
View on GitHub

Umbrella Holder

An intelligent microcontroller-based dryer for up to 6 umbrellas, featuring PID-controlled heating, automated blower operation via solid state relays, and smart auto-start functionality with IR sensor and door safety interlocks. Designed for reliability and ease of use in public or private spaces.

C++Arduino IDE
View on GitHub

Coconut Dryer

Coconut Dryer is an arduino-based embedded system that provides automated temperature, humidity, and moisture control for efficient drying operations using PID control algorithms and real-time sensor monitoring.

C++Arduino IDEPIDSolar Powered
View on GitHub
IoT Bike Tracker
View Photos (2)

IoT Bike Tracker

An advanced, solar-powered GPS bike tracker with real-time location monitoring and GSM communication.

C++SIM800LNEO-6M GPSSolar Powered
View on GitHub
Finance Fusion
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Finance Fusion

FiFo is a voice-enabled personal budgeting Android app that helps users track expenses, monitor income, and achieve savings goals. It’s simple, speech-powered, and designed to build smarter financial habits through reminders, forecasts, and budget controls.

JavaAndroid StudioSpeech RecognitionText-to-Speech
View on GitHub

Peso Exchanger

Currency exchange application

LaravelPHPFirebaseBootstrap
View on GitHub

About Me

Sajed Lopez Mendoza
QPPD

Hello! I'm Sajed Lopez Mendoza, a developer based in Quezon Province, Philippines.

I started my journey in mobile development and expanded into full-stack web development, machine learning, and real-time embedded systems.

I'm passionate about building smart, efficient solutions - from interactive dashboards and AI-powered applications to IoT systems and hardware prototypes.

  • Age: 30
  • Location: Unisan, Quezon Province
  • Status: Available
  • Contact: +63 961 293 6212

Work Experience

Full Stack Developer – KeySolutions Inc.

Pasig City | Onsite

  • Designed and delivered end-to-end GPS tracking solutions by integrating AVL hardware with backend and frontend systems for real-time vehicle monitoring. Developed and maintained Ubuntu-based backend services for reliable data processing, and built Android and web applications for tracking, visualization, and user interaction. Collaborated across the stack to optimize performance and effectively communicated system capabilities to stakeholders and leadership.

Android Development Trainer – Infinitech Training Center

Lucena City | Onsite

  • Delivered comprehensive training in Android fundamentals and 2D game development using Android Studio, providing structured mentorship, advanced debugging support, and end-to-end project guidance, with a strong focus on hands-on application development, code quality, and successful certification outcomes.

Freelance Developer – QPPD (Quezon Province Programmers/Developers)

Remote / Project-based

All-around development & hardware integration

  • Developed full-stack systems using modern frontend, backend, and database technologies, including real-time web and mobile applications with AI/ML integration. Built embedded solutions with microcontrollers and Raspberry Pi, designed and 3D printed custom enclosures for prototypes, and supported hardware and renewable energy projects through system installation, fabrication, and device maintenance.

Get in Touch

Want to inquire or ask a question? Reach out!