Сергій

SERHII VASYLIEV
Senior WordPress / PHP Engineer —
Performance & Content Automation
Kyiv, Ukraine • [відкрити контакти](див. вище в блоці «контактна інформація») • [відкрити контакти](див. вище в блоці «контактна інформація»)
[відкрити контакти](див. вище в блоці «контактна інформація») • github.com/Aberfort

PROFILE
Senior WordPress/PHP Engineer with 10 years of commercial experience building custom WordPress platforms,
plugins, and automation tools for high-traffic content and SEO operations. Specialized in performance engineering
(Core Web Vitals), ACF/Gutenberg architecture, and content-automation systems that remove manual work from
editorial and SEO teams. Comfortable owning a feature from architecture through CI/CD deployment and production
support.

WORK EXPERIENCE
2026 – Present Independent Plugin Developer, SEO Content Control Center
• Designed, built, and shipped a free WordPress.org plugin solo, passing the official
plugin review (security, sanitization/escaping, i18n, WordPress Coding Standards).
• Built a full-site SEO scan engine (PHP OOP, REST API, AJAX) that audits a 100-page
site in under 2 minutes, replacing hours of manual SEO checks.
• Tested on production sites with 200–500 posts and pages before public release.

Aug 2024 – Aug 2026 Senior WordPress Developer, Sharkscode
• Led performance engineering across the company’s site portfolio (page caching,
preload strategy, Critical CSS), bringing mobile LCP under 2.2s and mobile PageSpeed
to 80+ on key sites.
• Designed and built SC Autoparser, a multilingual content-import and
scheduled-publishing pipeline that replaced manual publishing for the content team
across all sites.
• Built reusable ACF/Gutenberg component libraries and private plugins shipped via
GitLab CI/CD with versioned releases, unifying deployments across internal and client
sites.
Dec 2023 – Aug 2024 WordPress Developer, 7Dxperts
• Delivered 15+ custom WordPress sites from Figma designs, from requirements through
launch and post-release support.
• Built reusable ACF block libraries that let clients assemble a new landing page in hours
instead of a full day, without a developer.
• Launched multilingual WPML sites (up to 5 languages) that passed Core Web Vitals at
go-live.
Nov 2021 – Dec 2023 WordPress Developer, Boosta
• Developed and supported a network of 20+ high-traffic iGaming affiliate sites in close
collaboration with the SEO team.
• Built internal SEO plugins (bulk import with WPML, meta/schema management,
internal linking) that scaled publishing from dozens to hundreds of pages per week.
• Raised mobile PageSpeed from 50 to 85+ on key sites, supporting the SEO team’s
organic growth.

Aug 2019 – Sep 2021 WordPress Developer, Intellectsoft
• Built 30+ campaign and event landing pages for Intellectsoft and its clients, often on
1–3 day deadlines, integrated with HubSpot, GTM, and analytics.
• Created reusable templates that cut landing-page launch time from 3–4 days to 1 day.

Aug 2016 – Aug 2019 WordPress Developer, White Label Agency (US Clients)
• Converted Figma/PSD designs into 25+ custom WordPress themes for US agency and
small-business clients, passing agency QA with minimal revisions.
• Maintained 15+ client sites long-term, handling core and plugin updates, security
hardening, and backups.

EDUCATION
2010 – 2015 Specialist Degree (equivalent to Master’s) in Computer Systems and Networks
• Poltava National Technical University named after Yuri Kondratyuk, Poltava, Ukraine.
• Coursework: computer networks and protocols (TCP/IP, HTTP, DNS), relational
databases and SQL, algorithms, operating systems, information security.

SKILLS
WordPress Custom Plugins & Themes • Hooks/Actions/Filters • REST API • ACF • Gutenberg
Blocks • CPT/Taxonomies • WP-CLI • WP-Cron • Action Scheduler • WPML •
Yoast/Rank Math
PHP & Backend PHP (OOP) • Laravel • REST APIs • MySQL • PostgreSQL • Redis • Background
Queues • Third-Party API Integrations
Frontend JavaScript • React (Gutenberg Blocks & Interactive Components) • HTML5 •
CSS3/SCSS • Tailwind • Vite • Webpack
Performance & SEO Core Web Vitals • Page & Object Caching • Preload Strategy • Critical CSS • Asset
Optimization • Technical SEO Automation
Infrastructure Docker • Linux • GitHub/GitLab CI/CD • Nginx • Composer • NPM • Versioned Release
Pipelines
AI-Assisted Dev Claude Code • Codex

LANGUAGES
Ukrainian — Native • English — B1 (technical documentation, written communication) • Russian — Fluent