Frontend Developer (React) – Junior / Middle
Careerswift · Warsaw, Masovian Voivodeship, Poland
Technology, Information and Media · 2-10 employees
About the role
Develop and maintain modern, responsive web applications while collaborating with designers and backend developers. Optimize application performance, ensure accessibility, and participate in code reviews to maintain high development standards.
What they look for
Requirements
Requires 2-4+ years of commercial experience with React, JavaScript, and TypeScript. Candidates should have strong problem-solving skills and experience with modern frontend tools and API integration.
Benefits
Full description
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.
- Experience with modern CSS solutions (Tailwind CSS, Styled Components, SCSS, Material UI, etc.).
- Knowledge of testing frameworks (Jest, React Testing Library, Cypress) is a plus.
- Ability to work independently and collaborate in an agile environment.
Nice to Have
- Experience with Next.js.
- Familiarity with CI/CD pipelines.
- Experience with Docker.
- Knowledge of accessibility (WCAG) standards.
- Experience working with cloud platforms such as AWS, Azure, or GCP.
- Understanding of modern frontend build tools (Vite, Webpack).
What We Offer
- 100% remote work with flexible working hours.
- Opportunity to work on modern, scalable web applications.
- Supportive and collaborative engineering team.
- Professional growth and learning opportunities.
- Competitive salary based on experience and skills.
- Interesting international projects using modern technologies.
Location: Remote
Seniority Level: Junior / Middle
