Looking for a job

Cesar Siancas

@cesarsiancas

Senior WordPress and PHP developer, 15+ years. WooCommerce, custom plugins, and Laravel SaaS. Toptal Top 3%. Working with US and EU teams.

Thailand

Message

What I'm looking for

Looking for a senior role, full-time, part-time, or contract, owning real engineering work: custom WordPress plugins and themes, WooCommerce, API integrations, performance, or PHP and Laravel backends. I value clean, documented code and clear async communication. Remote from Bangkok, overlapping with US and EU hours. Available now.

I started my career building business systems in C#, .NET, and SQL, then moved to PHP and WordPress, where I've spent the last 12 years. Most of that time has been long engagements with agencies and product companies, where I owned the codebase instead of picking up one-off tickets. I've been a vetted Toptal engineer for about six years.

Some of the work I'm proudest of:

WooCommerce modernization: I took ownership of an eCommerce company's main store and four landing sites, refactored the legacy code onto a Sage-based architecture, and made the store more than 50% faster. I also built a custom API integration with their Acumatica ERP that removed a lot of manual data work.

Rosh Review: I split their WordPress site into a multisite platform with several child sites, and built the main theme with Tailwind CSS and the Tonik starter theme.

TestGorilla: I made their corporate site multilingual, automated part of the translation workflow with XLIFF files, and stabilized deployments across several environments.

Lead pipeline integrations: for an agency client, I connected a WordPress site to LeadConduit, BlueShift, and Zapier so leads from every source reached one tracked pipeline.

Outside client work, I built and run NextTurn, a multi-tenant queue management SaaS on Laravel, Livewire, and Paddle billing. I also maintain two open source Beaver Builder plugins on WordPress.org, including a module creator with a REST API that AI agents can use to build modules.

What I'm looking for: senior roles where I own real engineering work, such as custom plugins, WooCommerce, integrations, performance, or PHP and Laravel backends. I work well with distributed teams, communicate clearly in English and Spanish, and overlap with US and European business hours from Bangkok. Open to full-time, part-time, and contract roles.

Experience

Work history, roles, and key accomplishments

Senior WordPress Developer

Mellow Fellow Fun LLC

Apr 2025 - May 2026 (1 year 1 month)

Managed and optimized a portfolio of 5 WordPress eCommerce websites, increasing performance by 50%+ through refactoring and modern architecture. Engineered custom API integrations with ACUMATICA ERP and delivered responsive landing pages.

WordPress WooCommerce SAGE API Integration Performance Optimization Responsive Design

Senior WordPress Developer

Keystroke Learning

Feb 2025 - Apr 2025 (2 months)

Refactored custom plugins for scalability and maintainability, developed WooCommerce integrations for course sales, and improved site performance and stability.

WordPress WooCommerce Plugin Development Performance Optimization

Senior WordPress Developer

FreezerFit LLC

Dec 2024 - Apr 2025 (4 months)

Implemented BuddyPress integration for social features, resolved bugs, and applied design updates to improve UI consistency and usability.

WordPress BuddyPress Bug fixing UI UX

Senior WordPress Developer

TGH B.V.

Dec 2024 - Jan 2025 (1 month)

Implemented BuddyPress integration, resolved bugs, and applied design updates to enhance stability and user experience.

WordPress BuddyPress Bug fixing UI UX

Senior WordPress Developer

LaGrande Marketing

Oct 2018 - Sep 2024 (5 years 11 months)

Handled all aspects of WordPress development including custom themes, maintenance, performance optimizations, and technical SEO improvements.

WordPress Custom Theme Development Technical SEO Performance Optimization

Senior WordPress Developer

TestGorilla B.V.

Aug 2022 - May 2023 (9 months)

Updated WordPress theme and plugins for multilingual support, developed custom scripts for SEO and performance, and automated translation workflows using XLIFF.

WordPress Multilingual Technical SEO XLIFF Automation

WordPress Senior Developer

Orderly Health

Feb 2022 - Jun 2022 (4 months)

Developed the main website using Beaver Builder, created custom modules, and integrated contact forms with Salesforce.

WordPress Beaver Builder Salesforce Custom Modules

Senior WordPress Developer

Pocketmade

Aug 2021 - Dec 2021 (4 months)

Maintained and extended custom WordPress themes and plugins, established GTM and Google Analytics, and managed integrations with LeadConduit and BlueShift.

WordPress Google Tag Manager Google Analytics API Integration LeadConduit Blueshift Zapier

Senior WordPress Developer

Praxent

Jan 2021 - May 2021 (4 months)

Managed SEO-related technical issues, created Gutenberg blocks, and optimized theme structure for a Gutenberg-based site.

WordPress Gutenberg Technical SEO Theme Development

Senior WordPress Developer

Bridgecrew

May 2020 - Mar 2021 (10 months)

Constructed a responsive theme from scratch using Tonik starter theme with ACF blocks, and managed site maintenance and bug fixes.

WordPress Tonik ACF Responsive Design Bug fixing

Senior WordPress Developer

RoshReview

Oct 2020 - Dec 2020 (2 months)

Created a multisite environment, developed the primary theme using Tailwind CSS and Tonik, and executed technical SEO improvements.

WordPress Multi Site Tailwind Tonik Technical SEO

Senior WordPress Developer

The Dancel Group, Inc

Sep 2020 - Nov 2020 (2 months)

Engineered a custom plugin for scheduling social media posts, integrated with WooCommerce and subscription plugins, and built a custom theme using ACF.

WordPress Plugin Development WooCommerce ACF Social Media