Kirill Bytin

Front-End Web Development · Full-Stack Web Development · Spain · Remote

Professional Summary

Innovative and solution-oriented Front-End specialist with over 8 years of React-based development, focusing on design systems. Skilled in Scrum and Agile, with strong unit and integration testing practices. Uses AI tools (Cursor, ChatGPT) to accelerate development and expand test coverage. Improved Core Web Vitals on a B2B e-commerce platform (LCP 3.6 s → 2.1 s, CLS 0, TBT −50 %). Provides guidance on Google Analytics and web-speed optimisation. Fluent in English, Russian and Ukrainian; experienced in remote teams and looking to grow into full-stack work.

Technology Summary

AI & Productivity: ChatGPT, Cursor IDE, own agents
Languages: JavaScript (ES6+), HTML, CSS
Frameworks & Libraries: ReactJS, Redux, GraphQL (Apollo), jQuery, MeteorJS
Testing: Jest, Testing Library, TestCafe
Databases: MongoDB, PostgreSQL
CSS & Styling: Pug, Stylus, Sass, PostCSS, CSS-in-JS
Version Control: Git
CI/CD & Deployment: Netlify
Bundlers & Task Runners: Webpack, GulpJS
SSG & Headless CMS: GatsbyJS, GraphCMS
E-commerce: WordPress, Prestashop
Data Viz: HighCharts

Experience

Krusche & Company GmbH — Frontend Developer (Remote) • 09/2019 – Present

Develop and maintain a server-side-rendered B2B e-commerce platform (React, Redux, Node.js) that replaced a static catalogue site with a dynamic storefront.
Work in a distributed Scrum team: daily coding, reviews, and shared monorepo workflows.
Improved Core Web Vitals (LCP 3.6 s → 2.1 s, CLS 0, TBT −50 %) and set up Google Analytics.
Added internationalisation and multi-domain support while keeping a single codebase.
Introduced a design-system-first approach, reducing UI rework and speeding feature delivery.
Implemented AI-assisted workflow (Cursor, ChatGPT, custom agents) that auto-generates test scaffolds, raised coverage by 18 %, and helped close 3–6 tickets per sprint (team avg 2–4).
Maintain unit, integration, end-to-end and Storybook tests in CI.

Akvelon — Senior JavaScript Developer (Remote) • 05/2019 – 09/2019

Led UI redesign and creation of a company-wide UI library.
Migrated codebase from class to function components and from Apollo HOCs to hooks.
Implemented new GraphQL features and related UI.
Reviewed pull requests and supported team members.

AgileEngine — Senior React Developer (Remote) • 08/2018 – 05/2019

Full-stack development in MeteorJS, migrating Blaze/jQuery templates to React.
Planned and executed feature implementations across front-end and back-end.
Authored extensive documentation and introduced Jest and Cypress testing.

Choicely.com — Software Development Engineer (Remote) • 02/2016 – 02/2018

Developed UI for a voting platform and embeddable widgets, focusing on HighCharts/HighMaps visualisations, GatsbyJS static pages, and Redux-based state management.

Freelance — Front-End / Full-Stack Developer 01/2009 – 02/2016

Delivered numerous client projects ranging from e-commerce to media websites, emphasising performance, SEO and UX.

Earlier Career 2000 – 2009

Held various non-IT roles in sales, finance and entrepreneurship, developing strong communication and management skills.

Education

V. N. Karazin Kharkiv National University — B.S. in Finances & Banking, 2004

Courses & Continuing Education

FreeCodeCamp (2016) · JavaScript 30 · Flexbox IO · Learn Redux · ES6 IO · React for Beginners · Egghead.io courses