Available for opportunities
Iloilo City, Philippines

Hi, I'm AJ
Backend Engineer

I engineer high-performance systems for startups and enterprises, specializing in the PERN stack and Flutter.

AJ Aparicio
🚀 Builder
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About Me

Crafting Digital Experiences

I build robust, user-centric applications where architecture meets utility. As a Full-Stack Engineer, I turn complex requirements into clean, type-safe code, prioritizing stability and speed.

Leading development cycles and managing production DevOps has fast-tracked my growth. I thrive on integrating AI and IoT into practical workflows—solving real problems, from logistics to education.

backend

NestJSNode.jsPythonREST APIsMicroservices

frontend Mobile

FlutterNext.jsReactTailwind CSS

database

PostgreSQLPrismaTypeORMOptimization

dev Ops

DockerCI/CDLinuxCloud

ai Iot

OpenAI APIComputer VisionRaspberry PiSensors
2+
Years Experience
15+
Projects Completed
20+
Technologies
10+
Happy Clients
Career Journey

Professional Experience

Allutional

Backend Engineer

Engineered high-availability server-side apps with Express.js and Node.js. Managed deployment pipelines, enforced architectural standards, and optimized backend logic to consistently meet sprint goals.

Inertia Ltd.

Junior Software Developer

Led full-stack web and mobile development. Collaborated on feature planning and executed rigorous QA protocols to ensure bug-free, stable releases.

Self-Employed

Freelance Developer

Delivered bespoke software solutions across industries. Managed the full lifecycle from concept to handoff, focusing on operational efficiency and client satisfaction.

Yaichi

QA Tester & Planner

Aligned business logistics with technical feasibility. Executed critical QA testing to catch edge cases, preventing costly errors in cross-border shipping logic.

Featured Work

Project Showcase

A collection of projects that showcase my skills in full-stack development, AI integration, and IoT solutions.

BayloCentral
Next.jsNestJSPostgreSQL+1

BayloCentral

Lead Full-Stack & DevOps

A digital marketplace for MSMEs. I architected the full-stack infrastructure and containerized DevOps, enabling local merchants to expand beyond physical stores.

SnapScore
FlutterOpenAI APIPython

SnapScore

Lead Backend & Mobile

AI-powered grading app. I integrated OpenAI's vision to convert physical test images into structured data, automating grading for educators.

Falsisters
FlutterReactNestJS

Falsisters

Lead Developer

Retail ecosystem with mobile POS and web admin. I built a real-time sync engine to eliminate stock discrepancies instantly across devices.

Floodwatch
Raspberry PiPythonNode.js

Floodwatch

IoT & Fullstack Developer

IoT disaster response system. I bridged hardware and software, processing sensor data to visualize flood in real-time.

GeoTraizer
Next.jsPrismaPostgreSQL

GeoTraizer

Lead Full-Stack Developer

A map-focused and visualized project management system for Iloilo Province, developed for the PGENRO provincial office. I built the fullstack system from development to deployment.

ClickClick
FlutterExpress

ClickClick

Lead Developer

A photobooth application for Windows with an Express backend for soft copy online service delivery.

Nexlock
Next.jsFlutterNestJS+2

Nexlock

Lead Full-Stack & IoT Developer

An IoT-enabled locker system allowing users to rent, lock, unlock, and checkout lockers from their mobile. I developed the entire ecosystem including server, mobile app, and admin web application.