Senior Android Engineer

Employer: Klarna

Location: Warsaw (hybrid work: 2-3 days in the office)

Rate: 170 - 195 PLN per hour

Cooperation model: B2B or Employment Contract

Start date: ASAP

Duration: long-term agreement

Recruitment process: 1 timed Abstract and Logical Reasoning Test (up to 15 minutes); 1 short interview (up to 30 minutes)

Do you want to play a key role in revolutionizing the future of finance? Join Klarna - a global leader in deferred payments, with over 85 million active users and 2.5 million transactions processed daily! As a pioneer in modern payment solutions, Klarna is developing innovative methods that streamline the shopping experience, enhance transaction security, and expand the availability of purchasing options. 

We're seeking individuals eager to achieve remarkable results and share their bold vision to redefine the future of payments and fintech. Send us your CV - we can’t wait to meet you!

Your role is:

-> To build and maintain a high-performance mobile SDK used by thousands of merchants and millions of end users, with a focus on native Android integrations for Passkeys, Keychain/Keystore, biometrics, and other platform APIs used by our React Native app;

-> To replace slow JavaScript views with optimized native implementations where appropriate, always prioritizing performance, security, and best practices; 

-> To integrate with third-party partners to deliver smooth and performant native experiences for ID scanning, NFC passport reading, and similar authentication flows, ensuring proper handling of camera access and permissions on both iOS and Android; 

-> To collaborate closely with cross-functional teams to drive innovation, maintain quality, and ensure seamless end-to-end mobile experiences—optionally contributing to React Native layers as well; 

-> To work with resilient financial systems and cutting-edge payment solutions, embracing Agile practices, clean and testable code, and a culture of learning, growth, and continuous improvement.

Your skills and experiences:

-> At least 6 years of experience in Android development with a strong proficiency in Kotlin; 

-> In-depth knowledge of the Android ecosystem and building frameworks;

-> Proven track record of writing clean, testable code and thorough documentation for Android frameworks;

-> Knowledge of release and sign management of Android applications, Continuous Integration (CI), and Continuous Delivery (CD);

-> Ability to take ownership and drive the development of impactful new features and products; 

-> A passion for collaborating with high-performing talented teammates to solve technical challenges;

-> Strong educational background in Computer Science, Information Technology, or a related field;

-> Language proficiency: Advanced English (minimum B2 level).

Nice to have:

+ Experience with Java, Groovy, JavaScript; 

+ Knowledge of platforms: Android SDK /Android Jetpack, React Native;

+ CI/CD experience: Fastlane, Jenkins;

+ Understanding of APIs: REST, GraphQL;

+ Acquaintance with backend: Node.js, AWS;

+ Familiarity with Datadog, Docker, Kafka.

Our client offers:

+ Great opportunity for personal development in a stable and friendly large multinational company;

+ Start-up mentality, small agile teams;

+ Global Reach: Impact millions with seamless shopping and payments;

+ Career growth and additional education.