Open to roles & freelance
Alex
Denysiuk.
Senior PHP Engineer
Laravel / WordPress / React
9+ years building custom PHP, WordPress and Laravel solutions - plugins, themes, REST APIs, and a production LMS with 400K+ registered users.
9+
Years in PHP
400K+
LMS users served
100s
WordPress sites built & run
4
Years on a US product
PHP ✱ Laravel ✱ WordPress ✱ Gutenberg ✱ React ✱ REST APIs ✱ WooCommerce ✱ AI Agents ✱ PHP ✱ Laravel ✱ WordPress ✱ Gutenberg ✱ React ✱ REST APIs ✱ WooCommerce ✱ AI Agents ✱
01 / About
About
I'm Alex (short for Oleksii), a 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.
02 / Experience
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.
03 / For clients
Hire me.
Need a senior developer without the agency overhead? I work directly with business owners, agencies, and product teams - from scoping to launch and ongoing support.
Custom WordPress
Custom themes and plugins, Gutenberg blocks, ACF and custom post types, WooCommerce, and migrations from Joomla or Wix.
Laravel apps & APIs
Backend systems, REST APIs, admin panels, and integrations with CRMs, payment systems, and third-party services.
Speed, SEO & accessibility
Core Web Vitals, technical SEO audits, accessibility fixes, and security hardening for existing sites.
AI features
Claude and OpenAI API integrations, content generation, and AI-assisted workflows built into your product.
04 / Work
Selected work
-
payand.help
Charity auction platform on WordPress. Built the custom theme and plugin from scratch, with a CI/CD deployment pipeline.
WordPress · Custom theme · Custom plugin · CI/CD
-
examia.pro
My own product: an AI-powered test and quiz generation platform for educators, built on Laravel with the Claude API.
Laravel · Claude API · CI/CD
-
marynesterchuk.com
Portfolio site for a book cover designer and illustrator.
-
evakuator1234.com
Site for a 24/7 towing and vehicle evacuation service in Rivne.
Under NDA
There's more I can't show here.
A good part of my work - client platforms, internal tools, and product features - is covered by non-disclosure agreements, so it stays off this site. I'm happy to walk you through it privately on a call: the problem, the architecture, my part in it, and the results, without exposing client names or code.
Case file #0427 · Confidential
Client: confidential client
Project: internal platform
Stack: Laravel · WordPress · React
Scope: custom features and integrations
Result: shipped to production
05 / Skills
Skills
Backend
- PHP
- Laravel
- Symfony
- REST API Design & Integration
- MySQL & DB Optimization
- CRM & Payment Integrations
- Firebase
- Roles & Permissions
- PHPUnit
WordPress
- Custom Plugins & Themes
- Gutenberg & Elementor Pro Blocks
- Block Themes (FSE)
- ACF / CPT
- WooCommerce
- WP-CLI
- Security Hardening
- Site Migrations (Joomla, Wix)
Frontend
- JavaScript (ES6+)
- TypeScript
- React
- jQuery
- SCSS / Sass / Less
- Responsive Design
- Cross-Browser Testing
- Core Web Vitals & Technical SEO
- Accessibility
AI-Assisted Development
- Claude API & OpenAI API
- Claude Code
- MCP
- Agentic Code Review
- AI-Assisted E2E (Playwright)
Services & Tools
- Git
- GitHub Actions (CI/CD)
- Docker
- Composer
- HestiaCP / cPanel
- Nginx
- Cloudflare
- AWS
- GCP
06 / Education
Education
Master of Computer Science - RSHU
Bachelor of Computer Science - RSHU
07 / Contact
Contact
Based in Ukraine (GMT+3), working remotely - comfortable aligning with US East Coast hours. Open to new roles, direct contracts, and freelance work.
GitHub
Location
Ukraine (Remote), GMT+3