Mobile Engineer

What you will do:

• Understand the architecture and lead the development of our lending app across Android and iOS platforms.
• Own critical features end-to-end: from requirement analysis, design, coding, testing, deployment, to post-release monitoring.
• Build intuitive, high-performance, and secure app experiences that drive trust and adoption in financial products.
• Work closely with product, design, and backend teams to deliver features that improve loan journeys, repayments, and customer engagement.
• Integrate with native device capabilities, 3rd party SDKs, payment gateways, and regulatory frameworks (KYC, compliance, etc.).
• Optimize app performance for scale such as battery usage, network reliability, and offline-first workflows.
• Mentor junior developers, review code, and follow the best practices in mobile architecture and CI/CD pipelines.
• Bridge the native and cross-platform worlds by building and maintaining robust communication layers between our core Android components, ensuring seamless and performant interactions.
• Stay updated with industry trends (AI/ML-driven personalization, app security, open banking APIs) and bring innovative ideas to Prefr.

You should apply if you:

• Have 5–8 years of proven experience in building and scaling consumer-facing apps (at least 1 end-to-end app on both Play Store & App Store).
• Are proficient in Kotlin/Java (Android) and Swift/Objective-C (iOS), with good exposure to Flutter/React Native for cross-platform features.
• live and breathe performance tuning, with demonstrable experience in debugging and optimizing memory, threading, and rendering issues on Android
• Have experience in fintech or lending apps (preferred), understanding secure data handling, payments, and compliance requirements.
• Thrive on building pixel-perfect UI/UX and delivering smooth, reliable user journeys.
• Have strong problem-solving skills, an ownership mindset, and the ability to lead technical discussions.
• are open to learning new technologies and are excited to grow your skills across the mobile stack.
• Bonus: Experience with AI-first app development (AI-assisted workflows, personalization, or chatbot integration).

Why join Prefr?

• Opportunity to shape the future of app-based lending in India.
• Work with a passionate, fast-moving team that values ownership and innovation.
• Flexible and transparent work culture.
• Competitive compensation and industry-best benefits.

Must Have

• Demonstrated evidence of writing Kotlin (Android) and Swift (iOS).
• Strong understanding of OOP and common design patterns; practical MVVM on both platforms (Hilt/DI on Android; Coordinators/DI patterns on iOS).
• Strong analytical and troubleshooting skills for root-cause analysis (Crashlytics, Logcat/ADB, Xcode logs, Instruments/MetricKit).
• Solid networking fundamentals on both: Retrofit/OkHttp (Android) and URLSession/Alamofire (iOS); auth/refresh, interceptors/middlewares, robust error handling.
• Ability to build modular, extensible features/libraries (Android feature modules; iOS frameworks/SPM/CocoaPods).
• Demonstrated evidence of data/analytics instrumentation (Firebase Analytics/BigQuery or equivalent) and event taxonomy.
• Understanding of RESTful API usage and versioning; collaborate effectively with microservices backends.
• Deep links/app links on Android (HTTP App Links) and Universal Links on iOS; WebView/WKWebView integrations with JS bridges.
• Push notifications end to end: FCM (Android) and APNs (iOS), including deep links and attribution.
• Store operations & compliance on both: Google Play (targetSdk, Data Safety) and App Store (ATS/privacy, review guidelines).

Should Have

• Foster usage of modern language constructs via code reviews (Coroutines/Flows, sealed classes on Android; async/await, structured concurrency on iOS).
• Experience with unit/UI/integration testing: JUnit/MockK/Espresso/Compose tests (Android); XCTest/XCUITest/Quick/Nimble (iOS).
• Understand high-level design and write low-level design docs for mobile features/modules.
• Manage and prioritize multiple tasks in a fast-paced environment; clear communication with product/QA/backend/design.
• Experience with the Firebase suite across both platforms: Analytics, Crashlytics, Remote Config, and Performance.
• Experience with CI/CD: Gradle + Fastlane/Play Publisher (Android); Xcode build systems + Fastlane/TestFlight (iOS); GitHub Actions/Jenkins.
• Experience with monitoring/release health: Crashlytics, Play Console vitals, Xcode Organizer/MetricKit.

Nice to have

• Mobile security hardening: certificate pinning (OkHttp/TrustKit), Play Integrity (Android) / DeviceCheck/App Attest (iOS), anti-debugging/root/jailbreak heuristics.
• Ability to solve problems at scale (heavy WebView journeys, OEM/device fragmentation, performance & memory tuning).
• A/B experiments and Remote Config-driven rollouts.