Frontend Developer (React Js / Next Js)

Uvation, Inc.; Polska; On-site; PLN 180,000 - 240,000; Full time

Job summary

Uvation, Inc. in Poland is seeking a skilled Frontend Engineer to build reliable, responsive user interfaces from approved designs and API contracts. You will deliver features independently, diagnose browser issues and contribute maintainable, well-tested code.

You will work with React, Next.js and TypeScript, focusing on performance, accessibility and component reusability. A strong understanding of modern front-end tools, testing with Vitest or Jest, and collaborating with design systems will

Qualifications

• Strong experience with React, Next.js, TypeScript and hooks-based component development.
• Good understanding of component lifecycle, effects, memoisation and techniques for preventing unnecessary re-renders.
• Experience with Next.js, Vite or a comparable modern front-end build framework.
• Experience with Zustand, Redux Toolkit or a similar state-management library, including correct and efficient use of selectors.
• Strong HTML5, CSS3 and SCSS skills, including responsive layouts, semantic markup and scoped styling.
• Working knowledge of accessibility fundamentals, including keyboard navigation, focus management and appropriate ARIA usage.
• Experience using a design system such as IBM Carbon, Material UI or an equivalent component library.
• Ability to implement interfaces accurately from Figma designs or other visual specifications.
• Experience integrating REST APIs and handling loading, error, empty and partial-data states.
• Experience with polling, request cleanup and defensive handling of incomplete or unexpected API responses.
• Working knowledge of environment configuration, package management and front-end build processes.
• Experience writing unit and component tests with Vitest or Jest and React Testing Library.
• Strong browser DevTools debugging skills and experience resolving cross-browser issues.
• Working knowledge of Git branching, pull requests, code reviews and collaborative delivery workflows.
• Ability to write clean, reusable and maintainable front-end code.
• Good knowledge of secure client-side development, including environment variables and safe logging.

Responsibilities

• Build reliable, responsive user interfaces from approved designs and API contracts.
• Deliver features independently, diagnose browser issues and contribute maintainable, well-tested code.
• Collaborate with design systems and ensure accessibility and performance best practices.
• Write tests and participate in code reviews to maintain code quality.

Skills

React & Next.js

TypeScript

Hooks-based components

Performance optimization

Accessibility basics

Design system usage

REST API integration

Testing (Vitest/Jest, RTL)

Git workflows (PRs, reviews)

Cross-browser debugging

Secure client-side development

Environment/config management

Code maintainability & reusability

Tools

Next.js

Vite

Zustand/Redux Toolkit

Job description

Job Overview

This role is responsible for building reliable, responsive user interfaces from approved designs and API contracts. The developer should be able to deliver features independently, diagnose browser issues and contribute maintainable, well-tested code.

React and Next.js | 4 to 6 years

Must Have Skills

• Strong experience with React, Next.js, TypeScript and hooks-based component development.
• Good understanding of component lifecycle, effects, memoisation and techniques for preventing unnecessary re-renders.
• Experience with Next.js, Vite or a comparable modern front-end build framework.
• Experience with Zustand, Redux Toolkit or a similar state-management library, including correct and efficient use of selectors.
• Strong HTML5, CSS3 and SCSS skills, including responsive layouts, semantic markup and scoped styling.
• Working knowledge of accessibility fundamentals, including keyboard navigation, focus management and appropriate ARIA usage.
• Experience using a design system such as IBM Carbon, Material UI or an equivalent component library.
• Ability to implement interfaces accurately from Figma designs or other visual specifications.
• Experience integrating REST APIs and handling loading, error, empty and partial-data states.
• Experience with polling, request cleanup and defensive handling of incomplete or unexpected API responses.
• Working knowledge of environment configuration, package management and front-end build processes.
• Experience writing unit and component tests with Vitest or Jest and React Testing Library.
• Strong browser DevTools debugging skills and experience resolving cross-browser issues.
• Working knowledge of Git branching, pull requests, code reviews and collaborative delivery workflows.
• Ability to write clean, reusable and maintainable front-end code.
• Good knowledge of secure client-side development, including environment variables and safe logging.

Good to Have Skills

• Experience with animation libraries such as GSAP, Framer Motion or React Spring.
• Experience with charting libraries such as Recharts, Chart.js, D3.js or High charts.
• Hands-on experience with three.js, React Three Fiber, WebGL or the HTML Canvas API.
• Familiarity with performance profiling, bundle analysis, lazy loading and dynamic imports.
• Experience with internationalization libraries such as react-i18next or next-intl.
• Experience with end-to-end testing tools such as Playwright
• Familiarity with error boundaries, front-end monitoring and CI/CD pipelines.
• Familiarity with Azure DevOps
• Experience working in an Agile team using Jira and Confluence.