Frontend Engineer - React & TypeScript (On-site Krakow)

BELVEDERE; Kraków; On-site; PLN 100,000 - 145,000; Part time

Job summary

BELVEDERE is looking for a Frontend Engineer to join their Krakow team on a 6-month on-site contract. You will design and implement user-facing features using React and TypeScript, ensuring high-quality, accessible, and performant web applications.

You will collaborate with product, design, QA and DevOps to deliver responsive, maintainable frontend code and take ownership from backlog refinement through production release.

Qualifications

• 6-8 years of professional experience developing modern web applications.
• Strong knowledge of JavaScript and TypeScript.
• Practical experience with React and Redux Toolkit.
• Good understanding of HTML, CSS, responsive design and browser fundamentals.
• Experience building reusable components and maintainable frontend applications.
• Experience integrating frontend applications with RESTful, GraphQL or equivalent APIs.
• Understanding of client-side state management and asynchronous application behaviour.
• Experience writing automated tests for frontend applications using Playwright.
• Understanding of unit, component, integration and end-to-end testing approaches.
• Familiarity with source control and collaborative development workflows.
• Experience participating in code reviews.
• Understanding of clean code, modularity, maintainability and separation of concerns.
• Awareness of accessibility, web performance and secure frontend development practices.
• Ability to diagnose and resolve frontend defects using browser and development tools.
• Ability to work independently on defined, moderately complex functionality.
• Understanding of modern frontend rendering approaches.
• Familiarity with frontend build tools and package-management ecosystems.
• Ability to document technical decisions and implementation details clearly.

Responsibilities

• Design and implement responsive frontend features using React and TypeScript.
• Translate product requirements and UX designs into working software.
• Integrate frontend applications with backend services and RESTful or GraphQL APIs.
• Write clean, reusable code following established engineering standards.
• Create and maintain unit, component, integration and end-to-end tests using Playwright.
• Participate in code reviews and provide constructive feedback to colleagues.
• Break down moderately complex requirements into manageable technical tasks.
• Handle loading, validation, error and empty states consistently.
• Apply accessibility standards and inclusive design practices.
• Monitor and improve frontend performance within assigned areas.
• Investigate defects and address root causes rather than symptoms.
• Contribute to backlog refinement, estimation and sprint planning discussions.
• Support releases and verify functionality behaves as expected in production.
• Maintain technical documentation for areas you work on.
• Share knowledge through pairing, technical discussions and demonstrations.
• Support onboarding and development of newer team members.

Skills

JavaScript

TypeScript

React

Redux Toolkit

RESTful APIs

GraphQL

Playwright

HTML/CSS

Web performance

Testing

Tools

Playwright

Job description

BELVEDERE is looking for a Frontend Engineer to join their Krakow team on a 6-month on-site contract. You will design and implement user-facing features using React and TypeScript, ensuring high-quality, accessible, and performant web applications.

You will collaborate with product, design, QA and DevOps to deliver responsive, maintainable frontend code and take ownership from backlog refinement through production release.