Lead/Senior Full-Stack Engineer (PHP/WordPress/JS)

Company The company specializes in lead generation within the iGaming domain, primarily through SEO-driven solutions. They work on long-term client projects and are currently expanding their internal development team. Position Overview We are looking for a Lead / Senior Full-Stack Engineer who operates at a true senior / lead level — not by years of experience, but by depth of expertise and ownership. This role is for someone who : takes full ownership of complex systems makes architectural decisions builds scalable solutions (not just features) sets and raises engineering standards within the team Location & Format Remote EU time zone required Full-time, long-term cooperation Language Requirements English — required for daily communication Strong English is a significant advantage Team & Projects You will join a stable team working on long-term lead generation platforms. This is not a task-execution role . We expect you to: take ownership of complex technical decisions improve architecture and system performance raise the overall engineering bar within the team Tech Stack PHP (Symfony) WordPress JavaScript HTML / CSS Key Requirements WordPress (must-have, advanced level) Experience building complex, large-scale WordPress systems (not content websites) Hands-on experience with WordPress Multisite (production) Strong experience with custom plugin development , including: OOP Composer / autoloading Typed properties Experience with: custom database structures custom caching strategies (not plugin-based) advanced use of WP_Query improving developer & admin tooling 👉 If your experience is mostly theme customization or plugin usage — this role is not a fit. PHP (strong senior level required) 5+ years with modern PHP (8+) Ability to design abstractions, libraries, and internal frameworks Experience with: phpcs / phpcbf custom sniffs OR PHPParser / AST reflection & introspection DTOs, Value Objects, clean architecture principles Frontend / CSS Strong modern CSS skills (must-have) Understanding of browser rendering, layout, and performance Performance & Optimization (critical) Deep understanding of Core Web Vitals Real experience with performance optimization (not just tools/plugins) Ability to identify bottlenecks and design custom solutions Mindset & Approach We are looking for engineers who: think analytically and architecturally deeply understand systems, not just tasks challenge “working solutions” and improve them proactively raise engineering standards 👉 If you mainly execute tasks and rely on predefined solutions — this role is not a fit. AI Usage AI is allowed, but must not be a dependency Strong preference for engineers with deep system understanding AI-generated communication is discouraged Start Date ASAP