Senior React + React Native Developer (only Poland)

We are looking for a Senior React + React Native Developer:

Tech Level: Senior

English Proficiency: Upper-Intermediate

Employment type: Full time

Candidate Location: a European location

Working Time Zone: a relevant European time zone

Start: 2025-06-02

Planned Work Duration: Long-term

Customer Description:

Our Client is a leading global consulting firm considered to be among the most prestigious ones in the world.

Large enterprise clients across industries rely on our Client’s proven platform and services.

🧩 Project Description:

The platform is the go-to solution for company data. It is a feature-rich, fast-performing web application that feeds on multiple company data microservices to deliver them in a summarized and clean fashion, and minimize single points of failure.

Among its capabilities are: customized permissions for user-specific layouts, data export to various commonly used formats, and screen adaptability for mobile and tablet.

It is a self-service hosted web application supported by a concierge desk that provides access to reliable financial, investor, operating and employee data, value creation analyses and performance benchmarking for tens of thousands of public and private companies.

Project Phase:

Active development

Project Team:

A cross-functional team with engineers and analysts

Soft Skills:

• Good communication skill

Hard Skills / Must Have:

• 6+ years of hands-on experience with React.js and building production-grade web apps

• 4+ years of experience with React Native for iOS and Android development

• Strong skills in TypeScript and modern JavaScript (ES6+)

• In-depth knowledge of React Hooks, Context API, and state management tools (Redux, Zustand)

• Proficiency in creating and styling UI with HTML5 and CSS3, including experience with CSS-in-JS libraries like Styled Components or Emotion

• Solid experience working with and customizing charting libraries such as charting libraries

• Strong understanding of rendering performance in chart-heavy UIs (virtualization, debouncing, lazy loading)

• Experience with mobile-specific challenges: navigation, push notifications, offline-first architecture, permissions

• Familiarity with RESTful and GraphQL APIs; experience with GraphQL client libraries

• Knowledge of testing tools: testing frameworks

✨ Hard Skills / Nice to Have (Optional):

• Kotlin / Swift

Responsibilities and Tasks:

• Develop and maintain scalable web and mobile applications using React and React Native

• Participate in designing frontend architecture and technical planning

• Integrate with RESTful and/or GraphQL APIs, implement offline mode and data synchronization

• Conduct code reviews and mentor junior developers

• Optimize app performance and handle bug fixing and troubleshooting

• Collaborate closely with designers, backend engineers, and QA teams

• Contribute to sprint planning and decision-making on technical challenges

🧪 Technology Stack:

React + React Native










📩 Ready to Join?
We look forward to receiving your application and welcoming you to our team!