Сергій

SERGIY MALIVANCHUK
FRONTEND DEVELOPER

PROFILE
Frontend developer with 3+ years of experience building scalable web and
mobile applications using React, Next.js (App Router), React Native, and
CONTACT TypeScript.
Experienced in designing frontend architecture, managing server/client
[відкрити контакти](див. вище в блоці «контактна інформація») boundaries, and implementing efficient data fetching and caching strategies.
Skilled in developing responsive and reusable UI components, integrating
[відкрити контакти](див. вище в блоці «контактна інформація»)
REST APIs, and optimizing application performance (Core Web Vitals, code
@mrBlueeSky splitting, lazy loading). Have hands-on experience contributing to backend
Ukraine, Vinnitska oblast, development, implementing API endpoints and working with databases.
Shargorod (ready to Focused on building maintainable, high-performance applications, improving
relocate) user experience, and following best practices in code quality and system
Serhio15210 design.

EDUCATION WORK EXPERIENCE

2019 - 2024 Fitofan 2025 - PRESENT
ONPU, ODESSA Full-Stack Developer
Bachelor's degree in
Developed and maintained a web application using Next.js and
Computer Science
TypeScript
Master's degree in Designed scalable frontend architecture with clear separation of
Cybersecurity server and client components
Built reusable UI components and responsive interfaces
Integrated REST APIs and improved performance with caching and
LANGUAGES efficient state management
Optimized application performance (code splitting, lazy loading,
English (Upper-Intermediate) hydration optimization)
Ukrainian (Native Speaker)
Poland (Beginner/Elementary) Oxios 2022 - 2025
Frontend Developer
MY WORKS Developed and maintained web applications using React.js, Next.js,
Vue3, TypeScript, Redux Toolkit, TanStack Query.
Svist Created responsive and adaptive UI and reusable components.
volve.vision Integrated REST APIs and optimized requests with caching and state
volvevision.com management.
Valikhnovski academy Contributed to mobile development with React Native and Expo,
Valikhnovska academy app implementing new features and ensuring stable performance.
Monolend
Phoenix.Rehabilitation Center Frontend Mobile Developer May 2024 - July 2024
SimplyNomX Audety
remont.live
Added new features and fixed issues in an Android mobile app using
React Native, Expo, TypeScript.
Worked with SQLite for local data storage and optimized app
performance on low-end devices.
Configured GitLab CI/CD pipelines to automate testing and
deployment.

SERGIY MALIVANCHUK
FRONTEND DEVELOPER

SKILLS

Core Frontend Backend & API Development (Basic)
JavaScript (ES6+), TypeScript Node.js, Express
CSS/SCSS/SAAS MongoDB, PostgreSQL
React, Next.js (App Router, SSR, API design & integration
ISR) Redis
Vue / Nuxt (basic)
React Native, Expo

Architecture & System Design Data & State Management
Scalable frontend architecture TanStack Query / RTK Query
Feature-Sliced Design (FSD) Zustand / Context API / Pinia
Client / Server boundaries Server vs client state separation
(Next.js) Caching strategies
State architecture design Zod (schema validation)
Data flow management

Performance Optimization API & Integration
Code splitting & lazy loading REST API
Core Web Vitals optimization GraphQL (Apollo)
(LCP, INP) WebSockets (Socket.io)
Bundle optimization Firebase
Hydration optimization Strapi
Rendering performance

DevOps & Tooling UI / UX Engineering
Git / GitHub Responsive design
CI/CD Material UI / Mantine / Radix UI / Shadcn
Webpack / build tools Forms (React Hook Form, TanStack Form)
Environment configuration i18n