Full-stack developer · API integration · scalable web apps

Building dependable products with clean code and thoughtful engineering.

I help teams build resilient web applications using React, Next.js, Node.js, and cloud-native deployment workflows. My work focuses on readable architecture, fast delivery, and production stability.

Google

Lighthouse Audit

4.89

The Lighthouse performance and reliability audit for this site passed with a near-perfect score.

Projects

Flyspout: Flight & Payment API Integration

Integrated flight booking services using the Duffel API, providing access to 300+ airlines and real-time flight search capabilities. Implemented secure payment processing with Stripe, handled booking workflows, and resolved production issues to improve reliability. Maintained and monitored multiple DigitalOcean environments, achieving over 83% uptime during a 9-month contract engagement.

Node.js

Express.js

Stripe

Duffel API

DigitalOcean

Next.js

GitLab CI/CD

Docker

Cloutchain: Blockchain & NFT Marketplace

Contributed to the development of a blockchain-powered NFT marketplace by building and maintaining automated CI/CD pipelines with GitLab and Node.js. Streamlined deployment processes, reducing manual effort by more than 70%, and collaborated closely with a team of developers to ensure code quality, efficient releases, and stable production environments.

Github CI/CD

Node.js

Next.js

GetStream

AWS EC2

AWS S3

Stripe

Hypersona: OpenSea-like NFT Marketplace

Developed responsive user interfaces using React and Tailwind CSS for an NFT marketplace inspired by OpenSea. Implemented modern UI components, optimized user experience across devices, and contributed to analytics features that tracked user engagement metrics. Assisted in deploying an Android application integrated with AI-powered insights to support product growth and user behavior analysis.

Tailwind CSS

React

Next.js

Node.js

Hiro Clinic: POS Application Technical Support

Provide front-end and back-end backlog support for an existing point-of-sale (POS) application used in clinic operations, built with Angular, Laravel, MS SQL, and Node.js. Handle low- to medium-severity issues and backlog items across the stack to maintain system stability and reliable day-to-day operation.

Angular

Laravel

MS SQL

Node.js

RecordingStudioApp: Java Console Catalog System

College capstone project: a console-based recording studio management system with role-based authentication (admin/user) secured by Argon2 password hashing. Built a layered architecture (controllers, services, repositories) to manage artists, albums, songs, and playlists, backed by a MySQL database with Flyway-versioned schema migrations.

Java

MySQL

birdCARE

College capstone project: a mobile-first web application for bird care and monitoring, with a Next.js frontend and a dedicated Node.js API backend.

Next.js

Node.js

OLFUShare

College capstone project: a resource-sharing platform for Our Lady of Fatima University students, built with a server-side rendered Next.js frontend and a NestJS backend API.

Next.js

NestJS

Tech Stack

Languages

JavaScript PHP Python Java SQL HTML CSS

Frontend

React Next.js Tailwind CSS Mantine

Backend

Node.js Express.js NestJS Laravel RESTful APIs

Databases

MySQL MongoDB

Cloud & DevOps

AWS EC2 AWS S3 DigitalOcean Docker GitLab CI/CD GitHub Actions

APIs & Integrations

Stripe Duffel API GetStream Postman

Tools

Git GitHub GitLab Linux Figma SonarQube SonarLint

Certificates

Foundations of Cybersecurity

Google via Coursera

Completed Foundations of Cybersecurity, covering core cybersecurity analyst skills, the business impact of security attacks, security ethics, and common analyst tooling.

Cybersecurity

Network Analysis

Information Assurance

Security Information and Event Management (SIEM)

Security Controls

Security Strategy

Data Ethics

Cyber Risk

2026 - no expiration date

Play It Safe: Manage Security Risks

Google via Coursera

Completed Play It Safe: Manage Security Risks, focused on identifying threats and vulnerabilities, applying frameworks and controls, and using SIEM tools and playbooks for incident response.

Risk Mitigation

Vulnerability Management

Risk Analysis

Threat Detection

Incident Response

Security Information and Event Management (SIEM)

System Monitoring

Cybersecurity

2026 - no expiration date

Cisco Certified Support Technician Cybersecurity (CCST Cybersecurity)

Cisco

The CCST Cybersecurity certification validates essential work-ready cybersecurity skills for support specialists, technicians, analysts, and auditors. It demonstrates knowledge in cybersecurity fundamentals and positions candidates for the Cisco Certified CyberOps pathway.

Cybersecurity

Cybersecurity Auditing and Analysis

Endpoint Security Concepts

Essential Cybersecurity Principles

Incident Handling

Network Security Concepts

Risk Management

Vulnerability Assessment

2026 - 2031

IT Specialist - Networking

Certiport, a Pearson VUE business

Earners demonstrate foundational networking knowledge and skills, including TCP/IP, networking services, topologies, and troubleshooting in wired and wireless environments.

Basic Networking Infrastructure

Internet Protocol

Local Area Networking

Network Security

OSI Model

Wide Area Networks

Wired and Wireless Networks

2026 - 2031

IT Specialist - Python

Certiport, a Pearson VUE business

Earners demonstrate the ability to recognize, write, and debug Python code to solve problems logically, showing foundational programming proficiency.

Python

Python Programming

2026 - 2031

DICT-ICT018 Basic Level of Software Engineering

Department of Information and Communications Technology (DICT)

Successfully completed the DICT-ICT018 Basic Level of Software Engineering training, gaining foundational knowledge in software development principles, programming concepts, version control, database fundamentals, software development life cycle (SDLC), and best practices for designing, developing, testing, and maintaining software applications.

Gantt Project

Agile Methodologies

Software Development Life Cycle (SDLC)

Software Metrics

User Interface Design

2024 - no expiration date

DICT-ICT013 Intermediate Level of Software Engineering

Department of Information and Communications Technology (DICT)

SSuccessfully completed the DICT-ICT013 Intermediate Level of Software Engineering training, building intermediate-level competencies in Agile methodologies, software architecture, project planning, software metrics, user interface design, and the application of the Software Development Life Cycle (SDLC) to real-world software development projects.

Software Design Patterns

Software Architectural Design

Git

GitHub

Application Frameworks

Secure Development Life Cycle

2024 - no expiration date

DICT-ICT017 Advanced Level of Software Engineering

Department of Information and Communications Technology (DICT)

Successfully completed the DICT-ICT017 Advanced Level of Software Engineering training, gaining advanced knowledge in software engineering principles, programming concepts, database management, version control, and the Software Development Life Cycle (SDLC). Developed practical skills in designing, developing, testing, and maintaining software applications using industry best practices.

SonarQube

SonarLint

Basic Software Quality Assurance

Intermediate Software Quality Assurance

Advanced Software Quality Assurance

Software Project Management

2024 - no expiration date

The Complete Full-Stack Web Development Bootcamp

Udemy

Completed The Complete Full-Stack Web Development Bootcamp by Udemy, gaining hands-on experience in building full-stack web applications using HTML, CSS, JavaScript, Node.js, Express.js, React, SQL, RESTful APIs, Git, GitHub, authentication, and database integration while following modern web development best practices.

HTML

CSS

JavaScript

Node.js

Express.js

React

SQL

RESTful APIs

Git

GitHub

Authentication

Database Integration

2022 - no expiration date

Education

Our Lady of Fatima University

Bachelor of Science - BS, Information Technology

Jul 2019 – Aug 2026

Activities and societies: OLFU Ignite-PSALM Secretary External and Fatima Computing and Multi-media Society Member

Our Lady of Fatima University

Senior High School, STEM - Technology

2017 – 2019

Kodego (917 Ventures)

Diploma - Full Stack Web Development

2022 - no expiration date

Built foundational proficiency across more than 10 technologies, including React, Node.js, PHP/Laravel, MySQL, and Figma, through a structured three-month internship program. Designed and managed relational databases using MySQL, with a focus on schema optimization to improve data retrieval efficiency. Applied UX/UI design principles using Figma and Adobe XD to create user-centered interface mockups, contributing to the design and development of intuitive, responsive web application projects.

JOYSIS TechVoc Inc.

National Certificate III (NC III) in Programming (Java)

Sep 2026 – Present

TESDA-accredited training (240-hour nominal duration) in Java programming, awarded through JOYSIS TechVoc Inc. as a Training for Work Scholarship Program (TWSP) under TESDA.

Feedback

Mary Joie Cruz

CEO and Founder · B612 Designs Innovations Lab, Inc.

“Gerald and his team consistently shows strong ownership of their assigned tasks, ensuring that work is completed reliably with minimal supervision. They are comfortable asking clarifying questions when needed and are honest about what they can and cannot take on, which helps maintain clarity and alignment throughout the work.”

Developer portfolio with a focus on clean engineering, reusable systems, and reliable deployment. Open to remote and collaborative work.

Quick links

Projects Tech Stack Certificates Education Feedback

Contact

geralddiego42@gmail.com github.com/gerald-diego54 linkedin.com/in/gerald-diego