Senior Mobile Application Engineer (React Native) (m/w/d)

Location: Berlin, BE, de

Company Description

Cint is a pioneer in research technology (ResTech). Our customers use the Cint platform to post questions and get answers from real people to build business strategies, confidently publish research, accurately measure the impact of digital advertising, and more. The Cint platform is built on a programmatic marketplace, which is the world’s largest, with nearly 300 million respondents in over 150 countries who consent to sharing their opinions, motivations, and behaviours.

We are feeding the world’s curiosity!

Job Description

We're looking for an experienced and passionate Senior Mobile Application Engineer to join our team. You will be responsible for the full lifecycle development of our next-generation, customer-facing mobile applications for iOS and Android, built primarily with React Native.
You will be instrumental in delivering a fast, beautiful, and stable cross-platform experience by using modern development practices and the latest features of the React Native ecosystem.

What You'll Do: Key Responsibilities

• Design and Development: Lead the development of high-quality, high-performance customer-facing mobile applications for iOS and Android using React Native, TypeScript, and related frameworks (e.g., Redux Toolkit, React Navigation).

• End-to-End Ownership: Take ownership of features from concept and technical design through implementation, testing, and deployment to the respective app stores.

• Cross-Functional Collaboration: Work closely with Product Managers, UX/UI Designers, and Backend Engineers to define scope, refine requirements, and integrate necessary APIs to create a seamless user experience.

• Platform Expertise: Leverage a deep understanding of the mobile application lifecycle and platform-specific requirements to ensure near-native performance and adherence to App Store and Google Play Store guidelines. This includes working with native modules when necessary.

• Quality and Performance: Implement robust unit, integration, and UI tests (e.g., with Jest, Enzyme, Detox) and proactively monitor, debug, and optimize application performance, focusing on metrics like startup time and crash-free sessions.

• DevOps and Delivery: Manage the continuous integration and continuous deployment (CI/CD) pipelines, including build processes, code signing, and the entire store submission process (e.g., using Fastlane, EAS, or similar tools).

• Modern Practices: Champion the adoption of modern React Native architecture (e.g., Fabric and TurboModules), superior state management, and best practices like modular architecture and component-driven development.

Qualifications

Education & Core Experience

• Education: A Bachelor's degree in Computer Science, Software Engineering, or a related technical field, or equivalent practical experience.

• Mobile Development Track Record: Proven, significant experience in professional mobile application development, including both native (Swift/Kotlin/Java) and non-native frameworks, with a strong emphasis on React Native.

• App Store Delivery Experience: Hands-on experience managing and executing the entire mobile application development lifecycle, including successful deployment, maintenance, and updates through the Apple App Store and Google Play Store. A portfolio of released applications is a strong plus.

Technical Skills

• Deep proficiency in React Native and the JavaScript ecosystem, including modern features of ES6+ and a strong preference for TypeScript.

• Expertise with mobile state management libraries (e.g., Redux, MobX, Zustand).

• Experience with testing frameworks (Jest, React Testing Library, or similar).

• Strong understanding of version control systems, especially Git.

• Familiarity with modern mobile architecture patterns (e.g., MVC, MVVM) and best practices for performance optimization and memory management.

Desirable Skills (Nice to Have)

• Experience with modern native development (Swift/iOS, Kotlin/Android) for building custom bridges or optimizing performance-critical modules.

• Knowledge of cloud services (e.g., AWS, Firebase) for backend integration.

• Familiarity with accessibility best practices for mobile applications.

• Experience with A/B testing implementation and mobile analytics tools.

• Working knowledge of Agile/Scrum development methodologies.

Additional Information

Our Values

Collaboration is our superpower

• We uncover rich perspectives across the world
• Success happens together
• We deliver across borders.

Innovation is in our blood

• We’re pioneers in our industry
• Our curiosity is insatiable
• We bring the best ideas to life.

We do what we say

• We’re accountable for our work and actions
• Excellence comes as standard
• We’re open, honest and kind, always.

We are caring

• We learn from each other’s experiences
• Stop and listen; every opinion matters
• We embrace diversity, equity and inclusion.

More About Cint

We’re proud to be recognised in Newsweek’s 2025 Global Top 100 Most Loved Workplaces®, reflecting our commitment to a culture of trust, respect, and employee growth.

In June 2021, Cint acquired Berlin-based GapFish – the world’s largest ISO certified online panel community in the DACH region – and in January 2022, completed the acquisition of US-based Lucid – a programmatic research technology platform that provides access to first-party survey data in over 110 countries.

Cint Group AB (publ), listed on Nasdaq Stockholm, this growth has made Cint a strong global platform with teams across its many global offices, including Stockholm, London, New York, New Orleans, Singapore, Tokyo and Sydney. (www.cint.com)

Additionally, in a world of AI, we want our candidates to understand our approach to the use of AI during the interview and hiring process, so we'd appreciate you reading our AI usage guide.