Native Android / iOS Developer

The core responsibilities for the job include the following:

SDK Engineering:

• Build and maintain native Android (Kotlin/Java) and iOS (Swift/Objective-C) SDKs used by bank, fintech, and startup apps.
• Own SDK architecture, versioning, and backward compatibility across partner and OS versions.
• Optimize SDK size, cold-start latency, and memory footprint.
• Write integration docs, sample apps, and support tooling for partner teams.

Device Security and Anti-Fraud:

• Build and harden root/jailbreak, emulator, debugger, and hooking-framework detection (Frida, Xposed, Cydia Substrate).
• Build device fingerprinting for fraud and risk signals.
• Implement RASP: obfuscation, tamper detection, integrity checks, and anti-repackaging.
• Track emerging bypass techniques and patch proactively.
• Feed device signals into the fraud detection engine, working with the security and ML teams.

Platform and Ecosystem:

• Work fluently across Android (Kotlin, NDK where relevant) and iOS (Swift, Objective-C).
• Integrate biometrics, Android Keystore, iOS Keychain/Secure Enclave, Play Integrity API, and App Attest.
• Define secure SDK-to-server protocols: token exchange, certificate pinning, replay protection.
• Support partner integration, testing, and certification directly.

Quality, Release, and Support:

• Test across a wide matrix of real devices, OS versions, and manufacturers.
• Own crash-free rate, ANR rate, and SDK stability in production.
• Build and maintain CI/CD for SDK builds, testing, and staged rollouts.
• Provide L2/L3 support for partner integration issues.

Requirements:

• 2-6 years of hands-on native mobile development experience (Android and/or iOS). Strong depth in one platform with working knowledge of the other is fine.
• Proven experience building and shipping SDKs (not just apps) consumed by external partners, with an understanding of versioning, backward compatibility, and public API design.
• Solid understanding of device security fundamentals: root/jailbreak detection, anti-tampering, code obfuscation.
• Working knowledge of device fingerprinting techniques and privacy-conscious identity signal generation.
• Familiarity with RASP concepts and implementation: runtime integrity checks, hooking/injection detection.
• Strong grasp of platform security primitives: Android Keystore / Play Integrity API, iOS Keychain / Secure Enclave / App Attest.
• Comfort working across Kotlin/Java (Android) and/or Swift/Objective-C (iOS).
• Experience debugging across a wide range of real devices and OS versions, not just emulators.

Good to Have:

• Experience with obfuscation/protection tooling (ProGuard/R8, DexGuard, iXGuard, or similar).
• Familiarity with the reverse-engineering tools attackers use (Frida, Xposed, Cydia Substrate, jadx, and Hopper), since understanding offense sharpens defense.
• Experience integrating with banking or fintech apps, or working under RBI/PCI-DSS-adjacent constraints.
• NDK/C++ experience on Android, or low-level iOS security work.
• Experience with certificate pinning, mutual TLS, or other secure-transport hardening.
• Contribution to a published SDK/library with real external developer adoption.

Skills

Android, Jailbreak, Kotlin, Obfuscation, Objective-C, Rasp, Root, SDK, Security, Swift, iOS