Sergey

SERGEY DUDKA
[відкрити контакти](див. вище в блоці «контактна інформація») | linkedin.com | Dnipro, Ukraine | [відкрити контакти](див. вище в блоці «контактна інформація»)

SUMMARY:

Experienced Senior Frontend Developer with 8+ years of expertise in building and optimizing
high-performance web applications. Proven ability to enhance Core Web Vitals, improve site speed through
bundle optimization and efficient loading strategies, and develop real-time UIs using WebSockets. Skilled in
React, TypeScript, and modern JavaScript frameworks, with a strong track record of contributing to
significant redesigns and maintaining shared component libraries across multiple international deployments.
Eager to leverage these skills to drive user experience improvements for your team.

EXPERIENCE:

Senior Frontend Developer in Motorsport Network – 06/2018 – 05/2026 (7y 11m)
-​ Spearheaded the development and maintenance of a shared component library for Motorsport.com
and Autosport.com, ensuring consistent UI and functionality across multiple editorial setups and
edition-specific configurations, while optimizing bundle sizes for over 13 regional deployments.
-​ Enhanced Core Web Vitals (LCP, CLS, FID) across all editions by refining CSS delivery order,
implementing deferred loading for non-critical scripts, and substituting blocking third-party tags with
asynchronous wrappers, resulting in improved ranking signals in Google Search Console across
various markets.
-​ Engineered a real-time race data user interface utilizing WebSockets, delivering live leaderboards,
lap times, and sector updates without requiring page reloads during F1, MotoGP, and NASCAR
events.
-​ Overhauled the frontend architecture and optimized performance for landing pages and main
editorial sites, including Motorsportnetwork.com and Drivenlifestyle.com. Redesigned animation
layers using GPU-composited properties to eliminate scroll-related frame drops on Apple devices.
Developed custom, hand-coded animations and engineered a JavaScript-driven asset pipeline for
dynamic script and image lazy-loading. Optimized bundles and compressed images, resulting in
superior site productivity, faster load times, and a seamless user experience.
-​ Implemented Google Tag Manager (GTM) and ad integrations across numerous editions, including
placements with Spring Media and Stroer for the German market, configuring custom event tracking,
viewability measurement, and audience segments for the commercial team.
-​ Deployed a user survey targeting over 50,000 visitors using Survey (Alchemer), developing the
embed code, configuring conditional question flows, and delivering structured results to product and
editorial teams.
-​ Contributed to a 6-month redesign of Automotive (Motor1.com / Rideapart.com / Insideevs.com) by
migrating component markup to Tailwind CSS, preserving shared logic to maintain a unified
codebase for the entire automotive division.

Senior Fullstack Developer in DEKA - 09/2016 – 06/2018 (1y 10m)
-​ Architected and developed the complete e-commerce platform for deka.ua from inception,
encompassing database schema design, backend development on the CMS Bitrix, and storefront
implementation for over 20,000 SKUs, including product listing, filtering, cart, and checkout
functionalities.
-​ Optimized performance by refactoring inefficient ORM queries into optimized, hand-written SQL with
appropriate indexes, decreasing the average response time on the main product listing from several
seconds to under 200ms, crucial for a large catalog with high SKU and filter usage.
-​ Constructed a high-performance faceted filter system for the product catalog, replacing slow
full-table scans with pre-aggregated index lookups to ensure rapid filtering even with tens of
thousands of SKUs.
 -​ Developed an SEO administration tool empowering third-party specialists to manage meta tags,
canonicals, and structured data independently, significantly reducing developer-requested SEO
modifications.

Junior Backend Developer in KTTSOFT – 02/2016 – 09/2016 (8m)
-​ Developed and launched websites and online stores for small business clients, managing the entire
process from initial setup and theme customization to plugin integration and fundamental SEO
configuration.

SKILLS:

Frontend: TypeScript, JavaScript, React, React Router, Zod, Prisma, Tailwind CSS, Bootstrap, D3.js,
Chart.js, HTML5, CSS3, jQuery

Backend: Node.js, Next.js, Express.js, REST API, MongoDB, PostgreSQL, MySQL, PHP

Performance: Core Web Vitals (LCP, CLS, FID), bundle optimisation, deferred/async loading, lazy images,
caching, GPU compositing

Real-time: WebSockets, live data UI, polling fallback

Analytics: GTM, advertising integrations (Spring Media, Stroer)

Tools: Docker, Git, Webpack, NPM, Cursor AI, VSCode + Windsurf,

EDUCATION:

Dnipro University of Technology – Computer Engineering – 2014 – 2018