Андрій

ANDRII HALCHYSHAK
Frontend | Mobile Developer

[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | Lviv
LinkedIn | GitHub
SUMMARY

Frontend Developer with practical experience in building responsive, high-performance web and mobile
applications using React, TypeScript, Next.js, and modern state management tools (Redux Toolkit / RTK
Query, Zustand). Adept at translating UI/UX wireframes into clean, scalable, and reusable component
architectures. Passionate about clean code standards, seamless REST API integration, and optimizing web
performance for an exceptional user experience.

KEY SKILLS
Languages: JavaScript (ES6+), TypeScript, HTML5, CSS3/SCSS
Frameworks & Libraries: React, Next.js, React Native, Expo
State Management & Data Fetching: Redux Toolkit, RTK Query, Zustand, REST APIs, Axios
Styling & UI: Tailwind CSS, NativeWind, Framer Motion, CSS Modules
Forms & Validation: React Hook Form, Zod
Tools & Workflow: Git, GitHub, Vite, Webpack, Postman, Figma, Clickup, Jira
Testing & Quality: Vitest, React Testing Library, ESLint, Prettier
Backend Basics & Databases / Services: Node.js / Express.js, Firebase

WORK EXPERIENCE

Insiders, Frontend Developer, Full-Time Jan 2026 - Present
Engineered and maintained modular, scalable client-side features using React, Next.js,
TypeScript, and Tailwind CSS, improving interface responsiveness and cross-browser
consistency.
Architected predictable global state management and client-server caching workflows with
Redux Toolkit and RTK Query, cutting redundant API requests and latency.
Integrated complex RESTful APIs, implemented robust form validation pipelines with Zod /
React Hook Form, and ensured data integrity across user flows.
Collaborated closely with backend developers and designers in an agile environment,
contributing to code reviews, Git branching strategies, and UI component libraries.

SamTech, Frontend Developer, Part-Time Dec 2025 - Jan 2026
Built and launched a high-performance B2B web platform from scratch using Next.js and
TypeScript, ensuring strict type safety and modular architecture.
Implemented Server-Side Rendering (SSR) and Static Site Generation (SSG) to optimize page
loading speeds, SEO visibility, and overall Core Web Vitals.
Integrated third-party analytics and RESTful APIs to manage corporate client inquiries,
streamlining business workflow and request handling.

EDUCATION

Software Engineering Sep 2024 - May 2028
Sambir Professional College of Informatics and
Information Technologies