Open to opportunities

Korol Oleksandr

@korololeksandr

Message

I’m a frontend engineer shipping production Next.js apps with React, SEO, and performance gains.

Czechia

Message

What I'm looking for

I’m looking for a remote role (EU/Global) where I can build production-grade Next.js/React features—especially auth, i18n, SEO, and performance—while shipping with strong testing and AI-assisted development.

I’m a frontend engineer with 2.5+ years of experience shipping production Next.js applications. I focus on modern React patterns like App Router, Server Components, and Server Actions, and I build multi-role authentication using OAuth and RBAC.

I’ve shipped features used by 5,000+ daily users and improved load times by 40% through SSR migrations. I also built SEO architecture—JSON-LD, sitemaps, and metadata templates—achieving 100/100 Lighthouse across 10,000+ indexed pages.

My day-to-day workflow is AI-assisted: I use Claude Code and custom MCP integrations to accelerate development while maintaining quality. I set up Jest unit tests and Playwright E2E coverage for critical user flows and run accessibility-focused QA audits.

Across my roles, I’ve migrated apps to Next.js App Router, implemented secure NextAuth-based auth with httpOnly cookies and CSRF protection, and delivered i18n with next-intl alongside Strapi headless CMS integration. I also built role-based admin experiences with full CRUD UI backed by RBAC permissions.

Experience

Work history, roles, and key accomplishments

Current

Frontend Engineer

Current

Abitly.org

Feb 2025 - Present (1 year 5 months)

Shipped production Next.js applications, including SEO improvements (dynamic JSON-LD, nested sitemaps, metadata templates) and delivering full coverage in Google Search Console. Built a multi-role authentication system and led migration to Next.js App Router with Server Components/Server Actions, plus i18n and Strapi headless CMS integration.

Server Components Server Actions NextAuth RBAC Sitemaps Google Search Console Ahrefs Strapi Framer Motion Jest Playwright SEO Lighthouse

Fullstack Engineer

Hands-On-Code

Apr 2024 - Feb 2025 (10 months)

Migrated user-facing features from client-side rendering to Next.js SSR, improving page load speed and Lighthouse SEO scores. Implemented authentication with NextAuth (GitHub OAuth), cookie-based httpOnly sessions, and CSRF protection, and built a role-based admin panel with CRUD UI governed by RBAC permissions.

Next.js Client Side Rendering Migration NextAuth OAuth Cookie Based Sessions CSRF RBAC CRUD SEO Lighthouse

Frontend Engineer

FICT Advisor

Aug 2023 - Apr 2024 (8 months)

Implemented parallel data fetching with React Query to eliminate request waterfalls and improve load times on critical pages. Resolved production issues across complex entity relationships and migrated session data from local storage to secure cookies for improved security.

React Query Waterfall Elimination Complex Entity Relationships Secure Cookies

Education

Degrees, certifications, and relevant coursework

Igor Sikorsky Kyiv Polytechnic Institute

Bachelor's in Software Engineering, Software Engineering

2023 -

Expected to earn a Bachelor's degree in Software Engineering at Igor Sikorsky Kyiv Polytechnic Institute (Faculty of Informatics & Computer Engineering) from 2023–2027.