Public site for a major regional bank — custom WordPress theme with a Gutenberg block library, right-to-left Kurdish language support, and an OpenAI-powered chatbot integrated into the content model. Delivered via .
Sviatoslav Klymenko.
Web developer building with WordPress, Vue, and modern frontend tooling. Five+ years shipping custom Gutenberg blocks, headless builds, and interfaces tuned for Core Web Vitals.
Fast by default. Block-editor native. Core Web Vitals first.
A developer who cares about performance & craft.
I’m Sviatoslav — a web developer based in Vlore, Albania, with 5+ years of professional experience. I specialize in WordPress, custom Gutenberg blocks, and modern frontend frameworks like Vue.js and React.
My focus is clean, performant code — whether it’s migrating legacy ACF layouts to React-based blocks, building multilingual sites with RTL support, or tightening Core Web Vitals so a marketing team’s investment actually pays off on mobile.
Technologies I work with.
Drag the sphere. The brighter nodes are the tools I reach for first — the ones I’ve shipped in production across multiple years.
Featured work.
Product-design agency site — full refactor of the main website, redesign, new interactive Gutenberg blocks, and modernized theme architecture.
Multi-page site for a safety-and-security company, built from scratch at . Animated product catalog and product landing pages with complex search across categories.
Frontend work on a high-traffic consumer VPN site. Built Vue 3 components for dynamic parts of the WordPress pages and migrated ACF blocks to React-powered Gutenberg.
Low-power semiconductor company’s marketing site. Built at with custom 3D animations and interactive sections using Three.js and GSAP scroll-driven effects.
Portfolio site for a designer — custom WordPress theme, creative editorial layouts, scroll-driven animations.
Full website build from scratch — custom WordPress theme with interactive features and a tailored editor experience.
Custom WordPress Gutenberg block plugin rendering an interactive books list. Built with @wordpress/scripts, React, PHP, SCSS.
Vue 3 + TypeScript SPA for generating and exploring color palettes. Quasar framework, deployed on GitHub Pages.
Vanilla HTML/CSS/JS interactive project. No framework, just browser primitives — deployed on Vercel.
What I do.
Three flavors of engagement, all anchored in the same principle: ship fast sites with editorial freedom baked in.
Custom themes & block libraries.
End-to-end WordPress builds from Figma: custom theme, Gutenberg block library with React, ACF-driven content models, multilingual setup with WPML.
- Theme from scratch
- Gutenberg blocks (React)
- ACF · CPT · Taxonomy
- WPML · RTL support
Vue & React interfaces.
SPAs, headless WordPress front-ends, marketing sites, dashboards. Typed, tested, and tuned for Core Web Vitals — not a framework playground.
- Vue 3 · Pinia · Quasar
- React · TypeScript
- Tailwind · SCSS
- Astro · Webflow
Performance rescue.
Inherit a slow WordPress or headless site? I audit, remove bloat, rebuild the hot paths, and push mobile Lighthouse back into the 90s without an agency contract.
- Lighthouse audits
- Bundle reduction
- Image & font strategy
- Technical SEO
Live performance
across shipped work.
is the clean proof point: a production WordPress site measured at 99 mobile performance with near-zero blocking time. This is the kind of result I optimize for: fast first paint, stable layout, lean JavaScript, and a WordPress editing experience that stays practical for the team behind the site.
Work history.
Supporting and maintaining 7 production websites. Leading migration from ACF to custom React-powered Gutenberg blocks, plus global theme refactoring, security hardening, and PageSpeed/SEO work.
Built Vue 3 components for dynamic parts of WordPress pages. Migrated legacy ACF blocks to modern React-powered Gutenberg. Refactoring and PageSpeed optimization across the product.
Delivered — custom WordPress theme with RTL Kurdish support, Gutenberg + ACF components, OpenAI API integration, and performance tuning.
Full refactor of the main site: redesign, new interactive Gutenberg blocks, modernized theme. SEO and PageSpeed across client sites.
Built and maintained sites on Elementor and WPBakery. Developed aviation-related features with JSON data integration into WordPress.
Built a creative multi-page site from scratch for OIB (Ohorona i Bezpeka) — animated product catalog and landings, SEO and PageSpeed work.
Development and support of designer websites with complex layouts, including . Custom WordPress themes & plugins, PageSpeed optimization, animations (SVG, Three.js, jQuery).
What I’m working on now.
Currently at , leading an ACF-to-Gutenberg migration across seven production sites — shifting editorial work from dev tickets to React-powered blocks, while global theme refactors push Core Web Vitals into the green band.
actively supported
React blocks, same editor UX
LCP, INP, CLS
Have a project in mind?
I take on a small number of engagements each quarter — usually WordPress builds, headless projects, or performance rescues. Tell me about yours.