Oleksii Denysiuk
<SeniorPHPEngineer />
9+ years building custom PHP, Laravel, and WordPress solutions - plugins, themes, REST APIs, and a production LMS with 400K+ registered users.
About
Senior PHP engineer with 9+ years of experience building custom backend systems, REST APIs, and integrations with CRMs, payment systems, and third-party services. I work across Laravel, Symfony, and WordPress (custom plugins and themes, Gutenberg, Elementor), with JavaScript, TypeScript, and React on the front end. I maintain a production LMS with 400K+ registered users, work closely with design and UX teams on launches, and have migrated sites from Joomla and Wix to WordPress. I also build AI agent workflows into my development process, from code review to test coverage.
Experience
PHP Developer (WordPress & Laravel) / Waverley Software
Jul 2022 - Present- Building and maintaining a custom LMS platform with 400K+ registered users and tens of thousands of monthly active users, combining WordPress with a Laravel-based component.
- Implementing advanced user roles and permissions, progress tracking, and third-party API integrations.
- Worked on the platform's achievement and badge system as part of learner progress tracking.
- Migrated WordPress user accounts between two CRM systems, preserving data integrity across the live platform.
- Introduced an agentic AI workflow for code review (security, performance, accessibility) and automated PHPUnit test coverage, speeding up delivery while keeping manual review in place.
PHP Developer / EvoPlay
Oct 2020 - Jun 2022- Built and maintained hundreds of WordPress sites on shared Nginx server infrastructure, including major news portals.
- Developed the Symfony-based server-side component of internal products used to manage and operate the WordPress site portfolio.
- Optimized site speed, UX, and SEO for high-traffic, conversion-driven websites.
Full-Stack Developer / Freelance (via Upwork)
Oct 2018 - Aug 2020- Delivered custom WordPress and Laravel projects for international clients, working directly with business owners from requirements to launch and support.
- Migrated client websites from Joomla and Wix to WordPress and built custom themes from design files with responsive layouts.
- Debugged cross-browser and front-end issues on existing client sites.
WordPress Developer / Rivo Agency (Rivne)
Aug 2017 - Sep 2018- Built custom WordPress websites for small-business clients, including landing pages and e-commerce stores.
Notable Projects
Charity auction platform on WordPress. Built the custom theme and plugin from scratch, with a CI/CD deployment pipeline.
My own product: an AI-powered test and quiz generation platform for educators, built on Laravel with the Claude API. Runs on dev, stage, and production environments with CI/CD.
Custom WordPress plugin that integrates Firebase and WordPress.
WordPress site for a Ukrainian manufacturer. Led security hardening (XML-RPC, TLS, wp-admin) and an SEO audit; built a custom Yoast metadata migration plugin.
Portfolio site for a book cover designer and illustrator.
Site for a 24/7 towing and vehicle evacuation service in Rivne.
Skills
Backend
WordPress
Frontend
AI-Assisted Development
Services & Tools
Education
Contact
Based in Ukraine (GMT+3), working remotely - comfortable aligning with US East Coast hours. Open to new roles, direct contracts, and freelance work.