(Senior) Mobile React Native Engineer (Platform)

About Raisin

For further development and expansion of our successful business, Raisin is looking for highly motivated, smart, and driven engineers to complement our team in Berlin.

What the job involves

As a Mobile Platform Engineer, you will work alongside our development teams to ensure a highly automated software development life‑cycle, as well as enable them to deploy our two React Native apps for the European and U.S. markets.

As part of the Tech Platform tribe, you will work with cutting‑edge technologies and initiatives that shape the vision of our Frontend & Mobile Platform, reducing bottlenecks, deepening domain expertise, and accelerating the delivery of mobile‑first features.

You will take full ownership of your work, from proposal to implementation, and are expected to challenge the status quo as a key work and culture component.

As an experienced Mobile Engineer, you will be providing a significant impact on our customers’ experience with Raisin product by optimizing Mobile applications for performance and scalability.

You will drive internal platform efforts, improving development tools and Mobile application ecosystem according to modern principles.

You will research, assess, develop and maintain new technology solutions for our Mobile platform.

You will provide stable automated solutions for our internal customers to speed up Mobile application testing and delivery.

Nurture teams to strive for test automation and quality assurance throughout the development process.

You will own, maintain and continuously evolve a large‑scale Mobile monorepo, ensuring its scalability, reliability and long‑term sustainability.

You will own, optimise and scale the shared CI pipeline, improving build performance, stability and developer productivity across teams.

Act as a “Mobile First Aid” point of contact, proactively unblocking engineers on platform and build‑related issues.

You will continuously enhance the developer experience by streamlining workflows, reducing friction and introducing improvements across the Mobile toolchain.

Drive architectural decisions together with the team, shaping the evolution of the Mobile platform in alignment with engineering standards and long‑term strategy.

Requirements

We are looking for someone with a strong software engineering experience, who seeks an opportunity to help other engineers solve complex problems using Platform Engineering practices.

• You hold a university degree in Computer Science or related fields or equivalent practical experience.
• You bring 3+ years of experience as a React Native developer, with a strong record of delivering high-quality, performant mobile applications for iOS and Android platforms.
• You can demonstrate proficiency with React Native, React Hooks, Redux, React Navigation, and Type Script, with the ability to build scalable, maintainable codebases.
• You show strong knowledge and experience in managing monorepos and related challenges with the tools like Nx or similar.
• You have hands‑on experience with integration, testing, code signing, and deploying apps through app stores, and familiar with CI/CD pipelines like Git Lab, Fastlane, and Expo EAS.
• You show a strong experience working with RESTful APIs and Graph QL, as well as integrating third‑party SDKs and libraries into mobile applications.
• You are an expert with tools like Datadog or Firebase Crashlytics to monitor performance and debug production issues.
• You have a strong understanding of mobile app security, including secure authentication (OAuth, JWT), encryption, and data privacy compliance.
• You have knowledge of creating and managing native modules for iOS and Android to enable seamless interaction between Native and React Native components.
• You have a strong passion for testing and are familiar with E2E testing tooling like Maestro.
• You feel comfortable and confident participating in technical and architectural discussions.
• You are an open‑minded and creative team player who is eager to contribute to the ongoing improvement of our technology and culture.
• You have great communication skills in English.

We value diversity and the unique experiences each individual brings. If you’re excited about this role but don’t meet every requirement, we still encourage you to apply.