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ILLIA KYRYCHENKO
Frontend Engineer

[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | Telegram | LinkedIn | Github

SUMMARY
Frontend Engineer with 2.5+ years of commercial experience building B2B and FinTech products with React,
Next.js, and TypeScript. Led a full-codebase migration from JavaScript to TypeScript (90%), aligning typing
conventions with the existing backend standarts; noticeably reduced runtime type errors post-migration.
Introduced testing from zero, reaching 71% statement / 72% line coverage and improving release confidence. Built
two business-critical features: a merchant-facing payment iframe enabling checkout integration, and a recurring
financial statement system (web + PDF) that users return to monthly - both built in direct collaboration with
backend and design.

WORK EXPERIENCE

Ficus Technologies | Frontend Engineer Oct 2023 – Mar 2026

Merchant Portal Mar 2024 – Mar 2026
Single-handedly migrated 90% of the production codebase from JavaScript to TypeScript, aligning typing
conventions with the existing backend standarts
Introduced unit testing from zero: defined the strategy and tooling (Jest, React Testing Library), reaching 71%
statement / 72% line coverage and raising confidence in releases
Built a payment iframe integration enabling merchants to embed checkout directly on their own websites,
using cross-origin isolation to keep the payment flow secure and unaffected by merchant-side code
Migrated a landing page application from HubSpot to Next.js and built a custom admin panel that enabled
non-technical users to manage content independently
Audited third-party dependencies with Snyk and resolved version conflicts to remediate known security
vulnerabilities
Designed and implemented complex statement rendering functionality, taking responsibility for the full
frontend solution across both web and PDF formats

ReserveNow Oct 2023 – Mar 2024
Interacted with designers and back-end developers to implement the functionality and look of the responsive
interfaces
Optimized web interfaces for SEO using semantic and meta tags, and correct content structure. Ensured web
interface accessibility for people with disabilities
Built a B2B sports-venue booking platform, a dashboard used to manage organizations, rental objects,
personnel, and reservations.
Created PixelPerfect, responsive webpages based on Figma grid layout design using HTML, CSS, SASS, and JS

EDUCATION
Bachelor Degree in Information Systems and Technologies
National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"
2021 - 2025

SKILLS
Languages: JavaScript, TypeScript
Frameworks & State: React, Next.js, Redux, Zustand, TanStack Query
UI & Styling: Ant Design, Styled Components, Tailwind CSS
Testing: Jest, Vitest, React Testing Library
Performance: Lighthouse, PageSpeed Insights, Chrome DevTools, Core Web Vitals, Bundle Analysis
Forms/Utils: Ant Design Forms, Yup, Day.js, Lodash
Backend/API: Node.js, Express.js, MongoDB, REST API