Senior Frontend Developer (React + React Native)

Solid Company; Polska; Hybrid; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Salary + bonus

Remote work options

Private medical care

Life insurance

Training budget

Modern offices

Job summary

Solid Company is seeking a senior frontend engineer to design and implement sophisticated user interfaces using React and React Native. You will collaborate with backend teams, UX/UI designers, and product owners to deliver scalable, reusable components and libraries.

The role emphasizes performance optimization, code reviews, and mentoring juniors within an international team. Remote work options and flexible hours are available, with strong emphasis on modern tech and professional development.

Qualifications

• 5+ years of React web app experience.
• 3+ years of React Native mobile apps experience.
• Strong knowledge of JavaScript ES6+, HTML5, CSS3.
• Experience with Redux or other state management.
• CI/CD and Git experience.
• Unit/integration testing with Jest/Enzyme/Testing Library.
• RESTful APIs and GraphQL integration.
• Frontend security best practices.
• Experience with Agile/Scrum.
• Excellent communication and English (B2).

Responsibilities

• Design and implement advanced UIs with React and React Native.
• Create and maintain reusable components and frontend libraries.
• Collaborate with backend, UX/UI, and product teams to deliver quality solutions.
• Optimize performance and scalability of applications.
• Conduct code reviews and mentor junior teammates.
• Contribute to system architecture and technology selection.

Skills

React

React Native

JavaScript

HTML5

CSS3

Redux

Git

CI/CD

Testing (Jest/Enzyme)

REST/GraphQL

Frontend security

Agile/Scrum

English (B2)

Communication

Tools

Lighthouse

Sentry

Job description

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).

Additional advantages:

• 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).

Kogo poszukujemy?

Responsibilities:

• 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.

We offer:

• 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.