Senior Frontend Developer (React + React Native)

ipracujzdalnie.pl; Warszawa; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Remote work option

Flexible working hours

Private medical care

Life insurance

Training budget

International environment

Modern offices

Job summary

ipracujzdalnie.pl seeks a Senior Frontend Developer (React + React Native) to design and implement advanced user interfaces in Warszawa. You will create reusable components, collaborate with backend and design teams, and optimize performance for scalable deployments.

You will work in an agile environment, mentor juniors, and participate in architecture decisions. Fluency in English (B2) is required, with remote work options and flexible hours.

Qualifications

• 5+ years creating web apps with React.
• 3+ years mobile apps with React Native.
• Strong knowledge of JavaScript, HTML5 and CSS3.
• Experience with Redux or state management.
• Familiar with Git and CI/CD workflows.
• Experience with REST and GraphQL APIs.
• English at least B2.

Responsibilities

• Design and implement advanced UIs with React and React Native.
• Create and maintain reusable frontend components and libraries.
• Collaborate with backend, UX/UI designers, and product owners.
• Optimize performance and scalability of applications.
• Perform code reviews and mentor junior developers.
• Participate in system planning and technology selection.

Skills

React

React Native

JavaScript ES6+

HTML5

CSS3

Agile/Scrum

English B2

Tools

Redux

Git

Jest

CI/CD

Job description

Our client is a modern, international technology company specializing in creating innovative solutions for the e-commerce and fintech industry, which values creativity, commitment, and teamwork.

Senior Frontend Developer (React + React Native)

location: Warszawa

Tasks

• Designing and implementing advanced user interfaces using React and React Native,
• Creating and maintaining reusable components and frontend libraries,
• Close collaboration with backend teams, UX/UI designers, and product owners to deliver high-quality solutions,
• Optimizing applications for performance and scalability,
• Conducting code reviews and mentoring junior team members,
• Participating in planning system architecture and technology selection.

Job Requirements

• Minimum 5 years of experience in creating web applications using React,
• Minimum 3 years of experience in creating mobile applications using React Native,
• Excellent knowledge of JavaScript (ES6+), HTML5, and CSS3,
• Experience with Redux or other state management tools,
• Familiarity with CI/CD tools and experience working with version control systems (Git),
• Ability to write unit and integration tests (Jest, Enzyme, Testing Library),
• Experience with integrating RESTful APIs and GraphQL,
• Knowledge of best practices related to frontend application security,
• Ability to work in agile methodologies (Agile, Scrum),
• Very good communication and interpersonal skills,
• Fluent in English (minimum B2 level).

Good To Have

• Experience with TypeScript,
• Knowledge of other frontend frameworks and libraries (Vue.js, Angular),
• Experience in conducting technical training and workshops,
• Familiarity with tools for analyzing and monitoring application performance (e.g. Lighthouse, Sentry).

We Can Offer You

• Attractive salary and bonus system,
• Possibility of remote work and flexible working hours,
• Private medical care and life insurance,
• Access to the latest technologies and tools,
• Budget for training, conferences, and professional development,
• Friendly and supportive work atmosphere in an international environment,
• Modern offices in convenient locations.