Serzh 

Serhii Zvarych
Software development engineer

Experience 5+ years of commercial work experience

Frontend Engineer 02.2024 – 07.2025
Startup Insider
Participated a major project with complex functionality. Conducted a comprehensive UI redesign, transitioning
styles to SCSS, and developed numerous new responsive pages and routes. Enhanced the application by updating
approximately 60% of its logic and establishing robust client-server communication. Implemented unit tests and
Contacts improved performance, focusing on SEO optimization utilizing Next.js features. Debugged extensively and refined
state management and API request logic, covering authentication, account settings, and media file management.
Stack: Next.js, Typescript, Redux, RTK query, Vitest, SCSS

[відкрити контакти](див. вище в блоці «контактна інформація»)
Software Development Engineer 10.2021 – 12.2023
[відкрити контакти](див. вище в блоці «контактна інформація») IT-company ZenwayCode
@Serzhj1 Engineered a fast, responsive and optimized frontend featuring spam protection, ensuring smooth and secure user
interactions, connected with backend.
[відкрити контакти](див. вище в блоці «контактна інформація») Stack: Next.js, Typescript, Tailwind, Zustand
Contributed to a streaming platform, optimizing media data handling and caching strategies for improved
[відкрити контакти](див. вище в блоці «контактна інформація») application performance. Streamlined code through refactoring efforts.
Stack: RN Expo, TS, Nativewind, RTK, Graphql
Kyiv, Ukraine Developed a 3D online game interface using iframe technology. Managed custom game events on the frontend,
implementing related logic and connectivity solutions.
Stack: React, Typescript, Context, WebSockets, iframe
Engineered a Progressive Web App (PWA) and web application, introducing reusable and optimized React
components. Designed authentication mechanisms for multiple user roles with JWT tokens and enhanced backend
Education logic. Integrated React Hook Form for data validation across routes, focusing on user account features, settings, and
CRUD operations for data management. Developed responsive designs.
Stack: React, Typescript, Redux, node.js, Styled Components or other styling lib
Focused on the frontend, creating reusable React styled components. Integrated React Hook Form for effective data
Kyiv National University of Trade handling and validation during data transfer to the backend. Implemented new responsive pages.
and Economics Stack: React, Typescript, Redux, Styled Components

Bachelor of International Trade and
Law faculty, Law, Financial Law. Software Development Engineer 09.2019 – 09.2021
2017 - 2021 State Enterprise INFOTECH
Migrated the project from JavaScript to TypeScript, significantly refactoring the codebase and achieving over 90%
coverage of frontend components with unit tests. Enhanced client-server communication and implemented push
notifications for a React Native application. Developed a cohesive app theme while creating new features, logic, and

Languages reusable components for both web and mobile applications.
Stack: React, React Native, Typescript, WebSockets, Redux, RTK, Jest & Enzyme

English ─ B1 - B2 Stack
Deutsch ─ A1 - A2
Ukrainian ─ C2 (mother language) Next.js, React, React Native, Expo, TypeScript, JavaScript
Russian ─ C2 Redux, RTK, MobX, Zustand
Tailwind CSS, SCSS, Styled Components, other styling libraries
Unit testing with Jest, Enzyme, Vitest
Node.js, Express, Apollo GraphQL, Python, Php, Nest, WebSocket
Mac OS, Linux, Windows

About me
I have 3+ years of experience working in English-language environment. I consider a pleasant work
environment in the team to be important. I value and support friendly, respectful, constructive
interactions. I perform tasks clearly and structurally. Programming brings me satisfaction, interest and
inspiration. In commercial collaborations, it leads to good productivity and a mutual interest in the
growth of the team and company.