A complete appointment scheduling and biometric check-in system designed for Barangay (community-level government) service management in the Philippines. Residents book appointments online, verify via SMS OTP, and check in at a physical kiosk using AS608 fingerprint biometrics.
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.
Fish Dryer v2 is a multi-microcontroller industrial control system that automates fish drying using PID-based temperature regulation, real-time weight monitoring, and an LVGL-powered touchscreen HMI. Designed for off-grid operation with solar power integration.
Oneverter is a modern, user-friendly desktop application built with Python and CustomTkinter that provides comprehensive file conversion capabilities for everyday use. It features a unified single-window interface for seamless navigation between different converter tools.
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Oven Controller
Compact, menu‑driven oven controller with temperature & humidity sensing, scheduling, and PID‑based heating.
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.
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.
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.
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.
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.
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.
