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Full Stack Developer
KC

About

Full stack developer with production experience across enterprise logistics and large-scale government education systems. Currently leading development of the Flying Tigers Express Business Portal. Co-founder and technical lead at Sanct, where I architected DepEd MPS, a regional score-monitoring platform supporting 50,000+ students, 200,000+ encoded scores, and 2,000+ educators.

Education

C

Cebu Institute of Technology - University

2022 - 2026
Bachelor of Science in Computer Science
M

Mater Dei College

2020 - 2022
STEM Engineering - Senior High

Work Experience

F

Flying Tigers Express

September 2025 - Present
Full Stack Developer
  • •Lead development for the Business Portal. Built key features, including bulk shipment import, partner dashboards, and waybill generation workflows.
  • •Architected the Business API integration layer — REST endpoints for bookings, batch tracking, webhook registration, rate limiting, and sandbox isolation — enabling programmatic shipment management for enterprise clients.
  • •Implemented Business Team Wallet on the backend and customer app: wallet activation, Xendit-backed top-ups, shared balance across team members, and default booking payment method configuration.
  • •Built centralized activity logging with entity-scoped metadata (shipments, businesses, invoices, tickets, API keys) and an Admin Ops global activity view with category filters, search, and human-readable formatting.
  • •Integrated third-party logistics workflows (e.g. Lalamove, Consegnia) via integration batches and webhook handlers, plus partner-facing webhook management in the Business Portal.
S

Sanct

December 2023 - September 2025
Co-Founder & Technical Lead
  • •Co-founded Sanct, a DTI-registered startup that designs and builds websites and web platforms for clients. Led the technical side, from system architecture to delivery.
  • •Built and delivered multiple client websites, including a real estate website and our biggest project, DepEd MPS.
  • •Technical lead for DepEd MPS, a Mean Percentage Score monitoring platform for DepEd Region X, owning system architecture and engineering delivery for regional score encoding, section management, and school/division performance review.
  • •Defined the technical roadmap and led the engineering team in shipping features aligned with how DepEd divisions and schools work, from educator score entry to division-level oversight and reporting.
  • •Architected a scalable system for high-volume education data, now supporting 50,000+ students, 200,000+ encoded scores, and 2,000+ active educators, and expanding to other regions in the Philippines.
  • •Set engineering standards around role-based access, encode-time data validation, and division/school aggregation, prioritizing security, data integrity, and maintainability for government use.
S

Symph

April 2023 - September 2023
Full Stack Developer Intern
  • •Contributed to the development of LessonPlanner, an AI-driven platform designed to automate and simplify lesson planning for educators.
  • •Built features for SnapProduct, a generative AI tool that transforms standard product photos into professional, photoshoot-ready images.
  • •Collaborated within cross-functional teams to develop, maintain, and enhance features across the full stack for various client and internal products.
  • •Maintained and optimized multiple ongoing web applications, ensuring code reliability and a smooth user experience across different project environments.
F

Freelance

2021 - 2022
Full Stack Developer
  • •Designed and built websites and small web applications for individual and small-business clients, handling requirements gathering, development, and deployment independently.
  • •Delivered a mix of marketing/portfolio websites, web apps with backend and database integration, and e-commerce sites, working directly with clients from scope to launch.
  • •Managed the full project lifecycle solo — client communication, UI implementation, backend/API setup, and post-launch fixes — building early experience in end-to-end ownership later applied in production roles.

Skills

React
Next.js
Angular
AngularJS
Vue.js
Node.js
Express.js
NestJS
Django
FastAPI
MongoDB
MySQL
PostgreSQL
Supabase
Firebase
React Native
Expo
Android Studio
Swift
Flutter
GCP
AWS
Vercel
Railway
GitHub Actions
CI/CD
My Projects

Check out my latest work

I've worked on a variety of projects, from simple websites to complex web applications. Here are a few of my favorites.

WildChats

WildChats

WildChats is a real-time chat application built for Cebu Institute of Technology - University (CIT-U) students, also known as Wildcats! This platform enables seamless communication among students, faculty, and organizations, providing a modern and secure chatting experience.

React + Vite
MongoDB
Node.js
Express.js
TailwindCSS
DaisyUI
Socket.io
Website
Source
AgriVision

AgriVision

AgriVision is a mobile application that utilizes deep learning and computer vision to detect lettuce diseases from images.

React Native
NativeWind
MERN Stack
Machine Learning
Source
ShrimpSense

ShrimpSense

Monitor, predict, and optimize shrimp farming with data-driven insights and real-time analytics. ShrimpSense ensures optimal water quality, disease prevention, and farm efficiency using AI-powered technology.

Next.js
TailwindCSS
ShadCN UI
Website
Source
HealthBook - App

HealthBook - App

Welcome to Healthbook — a cutting-edge digital health tracker designed to manage and monitor your complete medical history all in one place! Whether it's vaccination records, prescriptions, or family health details, Healthbook is your go-to app for simplifying your healthcare management.

React Native
NativeWind
Appwrite
Expo
Website
Lersch Grossman Algorithm Visualizer

Lersch Grossman Algorithm Visualizer

A lerch grossman algorithm visualizer built using Java and JavaFX. This aims to provide a visualizer for this specific algorithm using JavaFX for mining Engineers.

Java
JavaFX
Website
TeknoLost

TeknoLost

A lost and found mobile application developed as part of my 2nd-year project at CIT-U. Build using Android Studio, Java and Firebase for backend. The app aims to streamline the process of reporting and recovering lost objects.

Java
Android Studio
Firebase
Website
Research

Conference presentations

Research on computer vision and language models for real-time athletic form correction.

May 2026
12th International Conference on Education and Training Technologies (ICETT), Seoul, South Korea

Personal Back Squat Form Correction System Using Mediapipe Pose Estimation and QLoRa-Fine-Tuned Language Models

  • •Developed an AI-driven system that utilizes computer vision and fine-tuned LLMs to provide real-time feedback and correction for athletic form.
  • •Presented this research at the 12th International Conference on Education and Training Technologies (ICETT) in Seoul, South Korea, in May 2026.
Contact

Get in Touch

Want to chat? Just email me at karlchristianajero@gmail.com and I'll respond whenever I can.

LinkedIn