Kostiantyn Samusiev

Kostiantyn Samusiev

Frontend Developer — Landing Pages & Paid-Traffic Funnels

Kyiv, Ukraine

#OpenToWork

About

Frontend developer with 4+ years building landing pages, marketing funnels, and e-commerce front ends in HTML, CSS, and JavaScript. Works where frontend meets paid acquisition: pages judged on conversion rate and cost per lead, not just on delivery. Hands-on with WordPress, Shopify, OpenCart, and the GA4 / Google Tag Manager tracking stack behind them.

What I'm looking for

Remote Frontend Developer roles where frontend meets paid acquisition: landing pages, marketing funnels, and conversion-focused builds on WordPress, Shopify, or similar stacks. Strongest in hand-coded HTML/CSS/JavaScript, fast and lightweight markup built for speed and conversion rather than app-framework overhead. Especially interested in performance marketing, affiliate, iGaming, and e-commerce teams that value speed-to-launch and data-driven iteration.

Experience

Frontend Developer

Apr 2024 – Present

• Build landing pages and pre-landers for paid-traffic campaigns using reusable components and page templates, owning each page from design handoff to production across multiple products and geos. • Set up campaign tracking on Google Analytics 4, Google Tag Manager, AdsBridge, and Voluum, giving media buyers per-creative conversion and cost-per-lead data instead of channel-level totals. • Run A/B tests on page structure, offer placement, and CTAs, analyzing conversion data pulled from AdsBridge to decide which variant to scale. • Use LLM tooling to generate landing page copy and ad creative variants for those tests, shortening the cycle from campaign brief to live test. • Optimize Core Web Vitals (LCP, INP) through image compression, critical CSS, and deferred scripts.

Google Analytics 4Google Tag ManagerA/B testing

Marketing Agency (client under NDA)

Frontend Developer

Apr 2023 – Apr 2024

• Built and maintained SEO-oriented satellite and landing sites for iGaming affiliate campaigns, handling responsive HTML/CSS/JS markup across multiple offers. • Produced animated HTML5 display banners in standard IAB ad sizes for the same campaigns, from Photoshop/Illustrator source files to production-ready creative. • Delivered new site and banner sets on tight campaign turnarounds.

HTML5CSS3JavaScript

iGaming / Affiliate Marketing (client under NDA)

Frontend Developer

Jan 2022 – Mar 2023

• Built a library of genre-specific landing page templates (fantasy, horror, sci-fi, and others) used to launch Kickstarter and store advertising campaigns for board game clients. • Shipped 16 user-facing features alongside 6 developers, 6 designers, and 2 product managers, maintaining 20+ pages of production markup. • Integrated payment methods into client stores' checkout flow to support online purchases. • Built and maintained 6 WordPress sites, covering testing, deployment, and updates. • Set up Google Analytics and Google Tag Manager to report page and audience behavior back to clients, and used the same data to drive layout and content changes.

WordPressGoogle AnalyticsPayment integration

TipTop Tabletop (board game marketing agency)

Private Training Center

Instructor

Jan 2016 – Jan 2022

Six years living and working abroad; retrained into frontend development in 2021.

TrainingInstructionFrontend development

Private Training Center

Education

Khmelnytskyi National University

M.S. · Computer Systems and Technologies

2015

Certifications

Modern JavaScript

Udemy

2021 – No expiry

CMS WordPress + WooCommerce

Udemy

2021 – No expiry

Interactive HTML, CSS and JavaScript

HTML Academy

2021 – No expiry

Skills

PolylangElementorVoluumAdsBridgeMeta PixelGoogle Analytics 4A/B testingGoogle Tag ManagerShopifyWordPressBootstrapjQueryCore Web VitalsBEMResponsive developmentPHPSassCSS3HTML5JavaScript

Languages

Ukrainian (Native or bilingual proficiency)Russian (Native or bilingual proficiency)Chinese (Limited working proficiency)