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Seldrick De Leon, Senior Full-Stack Developer
Open to fun projects · GMT+8

About Seldrick

// Senior Full-Stack Developer

I'm Seldrick De Leon, a Senior Full-Stack Developer with over 10 years of experience building digital systems for businesses across the globe. I'm based in the Philippines and work with US-based and international clients.

Whether it's a custom Shopify store, a server migration, an SEO strategy, or an AI-powered automation pipeline, I approach every project with the same mindset: understand the problem deeply, then build the simplest solution that solves it completely.

background

My Story

I started building websites in my teens, tinkering with HTML and CSS long before I understood what "full-stack" even meant. What began as curiosity quickly became a calling. I realized I didn't just enjoy making things look good on screen; I loved the entire puzzle: the logic, the architecture, the problem-solving.

Over the years, I've built everything from simple marketing sites to complex multi-tenant CRM platforms. I've managed servers for dozens of clients, migrated terabytes of data across cloud providers, and automated countless business processes.

Today, I lead engineering, owning architecture, delivery, and standards across everything I ship. I still take on hands-on client work across web design, SEO, Google Ads, e-commerce, automations, security, maintenance, branding, and funnel creation. I'm currently hired full-time, and always open to a fun project.

"Show up. Work hard. Stay humble. Repeat." That's not just a motto. It's how I approach every project, every client relationship, and every line of code.
journey

Career Timeline

From first lines of HTML to leading engineering: the milestones so far.

01
2011-2014

First Lines of Code

Started learning HTML, CSS, and basic JavaScript. Built first websites and discovered a passion for web development.

02
2014-2016

PHP & JavaScript Deep Dive

Went deep on PHP and JavaScript, then into frameworks on both sides of the stack: front-end first, back-end after.

03
2016-2017

WordPress & CMS Platforms

Deep dive into WordPress and other CMS platforms, including custom themes and plugin development.

04
2017-2019

Full-Stack Developer & Full-Service Client Work

Started working end to end across front-end, back-end, database, and deployment. Broadened past builds in the same stretch, taking on web design, SEO, ads, e-commerce, automations, and ongoing maintenance for long-term clients.

05
2019-2020

Senior Developer & SEO

Became a senior developer, and went deep on SEO: technical audits, on-page strategy, and search performance.

06
2020-2024

E-commerce Expansion

Expanded into Shopify, Liquid templating, WooCommerce, and complex e-commerce solutions.

07
2024-2025

AI & Automation Integration

Integrated AI tools into workflows. Built custom pipelines with n8n, Zapier, and Make.

08
2025-2026

Infrastructure at Scale

Managing complex infrastructure, building multi-tenant platforms, migrating terabytes of data, and pushing into AI-powered development.

09
2026

Engineering Leadership

Took the lead on architecture, delivery, and engineering standards across projects, while continuing to build hands-on every day.

// Powered by coffee// Based in the Philippines// GMT+8 timezone// Dark mode everything// Lifelong learner// Catholic faith// Loves debugging at 2am// Detail-obsessed// Client-first always// Build > Talk// Powered by coffee// Based in the Philippines// GMT+8 timezone// Dark mode everything// Lifelong learner// Catholic faith// Loves debugging at 2am// Detail-obsessed// Client-first always// Build > Talk
principles

Core Values

Client-First Design

Every decision starts with what's best for the end user and the business goals.

Continuous Learning

Tech moves fast. I stay ahead by constantly exploring new tools, frameworks, and techniques.

Clean & Scalable Code

Writing code that's easy to read, easy to maintain, and built to scale from day one.

Transparent Communication

No jargon walls. I keep clients and teams informed with clear updates and honest timelines.

Efficiency & Automation

If a task can be automated, it should be. I build systems that reduce repetitive work.

Integrity & Ownership

I take full ownership of my work and stand behind every line of code I deliver.

Consistency Over Heroics

Show up, do the work, repeat. Steady progress ships more than a burst of effort that burns out before launch.

Lift the Team

Good engineering outlives one person. I document decisions, review generously, and leave the codebase easier for whoever comes next.

off the clock

When I'm Not Coding

Faith

I'm a practicing Catholic with an active interest in apologetics. My faith grounds me and informs how I approach work and relationships.

Learning & Reading

Always reading about new tech, business strategy, or theology. The best developers never stop being students.

Global Perspective

Working with clients across time zones and cultures has given me a broad perspective on how businesses operate worldwide.

"Show up. Work hard. Stay humble. Repeat."
// The Seldrick Way
credentials

Certifications

Foundations of Digital Marketing & E-commerce

Google

Attract and Engage Customers with Digital Marketing

Google

Currently hired · open to fun projects

Let's build something together.

It could be a fun side project, ongoing support, or engineering leadership. If it's interesting, I'm listening.

Fun projects · Ongoing support · Collaborations