Frontend Developer (React) – Junior / Middle

Company: CareerSwift

Location: Warszawa, mazowieckie (Remote)

Type: Full-time

Remote: Yes

Posted: 2026-08-06

About this role

## Job Description

### About the Role

We are looking for a Frontend Developer (React) to join our growing engineering team. Whether you're a strong Junior ready to take the next step or a Middle-level developer looking for new challenges, we'd love to hear from you.

In this role, you'll work closely with designers, backend developers, and product managers to build intuitive, responsive, and high-performance web applications. You'll contribute to new feature development, improve user experience, and help maintain a scalable and maintainable frontend architecture.

### Responsibilities

  • Develop and maintain modern web applications using **React**.
  • Build responsive, user-friendly interfaces based on UI/UX designs.
  • Collaborate with backend developers to integrate RESTful APIs and GraphQL services.
  • Write clean, reusable, and maintainable code following best practices.
  • Optimize application performance, accessibility, and responsiveness.
  • Debug, troubleshoot, and resolve frontend issues.
  • Participate in code reviews and contribute to improving development standards.
  • Stay up to date with modern frontend technologies and best practices.

### Requirements

Junior Level

  • **2+ years** of commercial experience with **React**.
  • Good knowledge of **JavaScript (ES6+)** and/or **TypeScript**.
  • Understanding of **HTML5**, **CSS3**, and responsive web development.
  • Experience with Git and version control workflows.
  • Familiarity with REST APIs.
  • Basic understanding of component-based architecture.
  • Strong problem-solving skills and willingness to learn.
  • Good English communication skills.

Middle Level

- 4+ years of commercial frontend development experience.
- Strong experience with React and modern JavaScript/TypeScript.
- Experience with state management solutions (Redux, Zustand, Context API, etc.).
- Experience integrating REST and/or GraphQL APIs.
- Solid understanding of performance optimization and frontend best practices.
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