Middle/Senior React Native Developer

Sigma Software Group

Warszawa

On-site

PLN 180,000 - 260,000

Full time

14 days+

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Job summary

Sigma Software Group in Warsaw, Poland, is seeking a Middle/Senior React Native Developer to build scalable mobile applications for global brands. You will work with a distributed team on iOS and Android, focused on delivering high-quality user experiences and fast, reliable performance.

We value product-minded engineers who own their work, collaborate across disciplines, and contribute to product decisions while growing technically in a fast-growing international project.

Qualifications

3+ years of commercial experience with React Native development.
Strong knowledge of React and React Native.
Experience with TypeScript.
Knowledge of GraphQL.
Experience with GitHub or other version control systems.
Understanding of mobile-first development principles.
Experience working with iOS and Android applications.
Upper-Intermediate level of English.

Responsibilities

Develop and maintain React Native applications for iOS and Android platforms.
Ensure smooth and engaging mobile user experiences.
Collaborate with cross-functional teams to deliver high-quality solutions.
Improve and maintain existing applications with a product-oriented mindset.
Contribute to launching new brands and expanding products into new markets.
Participate in technical discussions and suggest improvements across the development process.
Take ownership of application quality, performance, and stability.

Skills

React Native

React

TypeScript

GraphQL

GitHub

Mobile-first

iOS/Android

English

Tools

GitHub

Job description

Join a fast-growing international project where your work will impact mobile products used by millions of users worldwide. We are looking for a Middle/Senior React Native Developer with strong mobile expertise and a product-oriented mindset to strengthen our distributed team.

At Sigma Software, you will collaborate with experienced engineers to build scalable and high-performing applications for the iGaming domain.

Why join us? We offer the opportunity to work with modern technologies, influence product development decisions, and grow professionally in a collaborative engineering culture.

CUSTOMER

Our Customer is one of Europe’s largest GameTech companies and the owner of one of the biggest mobile gambling platforms with millions of active users worldwide. The company combines enterprise-scale products with a startup-like approach to innovation and product delivery.

PROJECT

You will join a team developing modern mobile applications for globally recognized iGaming brands. The project focuses on delivering high-quality user experiences, supporting new product launches, and expanding existing brands into new international markets. The team follows a mobile-first approach and values ownership, collaboration, and engineering excellence.

Job Description

Develop and maintain React Native applications for iOS and Android platforms
Ensure smooth and engaging mobile user experiences
Collaborate with cross-functional teams to deliver high-quality solutions
Improve and maintain existing applications with a product-oriented mindset
Contribute to launching new brands and expanding products into new markets
Participate in technical discussions and suggest improvements across the development process
Take ownership of application quality, performance, and stability

Qualifications