Senior iOS and Android Developer, Banking App

Client Our client is building a modern, cross-border financial platform designed to make banking seamless, secure, and fully mobile. The product supports users across multiple regions and covers key financial operations such as identity verification (KYC), money transfers, card management, and transaction tracking. Join a great company, not merely an individual project Project overview We are looking for a Senior iOS and Android Developer to take ownership of mobile applications across both platforms and contribute to a high-performance, security-critical fintech product. In this role, you will be responsible for the full lifecycle of features, from understanding business requirements to implementation, monitoring, and continuous improvement. Position overview We are looking for a Senior iOS and Android Developer to take ownership of mobile applications across both platforms and contribute to a high-performance, security-critical fintech product. In this role, you will be responsible for the full lifecycle of features, from understanding business requirements to implementation, monitoring, and continuous improvement. You will work on complex financial flows where reliability, performance, and user experience are essential, and help shape scalable mobile architecture. We are looking for a person willing to work in the time zone: GMT+5:30. Technology stack iOS: Swift, SwiftUI, UIKit, Combine, CoreData, Keychain Android: Kotlin, Jetpack Compose, XML, Coroutines/Flow, Room, DataStore Architecture: MVVM, Clean Architecture, Repository pattern Networking: URLSession / Alamofire, Retrofit / OkHttp Analytics: Mixpanel, RudderStack CI/CD: GitHub Actions, Fastlane Testing: XCTest, XCUITest, JUnit, Espresso Responsibilities • Develop and maintain core mobile features across iOS and Android • Build and evolve applications using modern frameworks (SwiftUI, Jetpack Compose) • Ensure high standards of security (authentication, biometrics, encryption, session handling) • Design and maintain scalable architecture (MVVM, Clean Architecture, separation of concerns) • Optimize performance (startup time, responsiveness, memory usage, crash-free rate) • Implement analytics and monitoring to track user behavior and system reliability • Collaborate closely with product, design, backend, and cross-platform teams • Deliver consistent product features across platforms with platform-specific excellence • Proactively identify issues, improve UX, and ensure high-quality releases Requirements • 4+ years of experience in mobile development (iOS and/or Android) • Strong proficiency in Swift and/or Kotlin • Experience with SwiftUI and/or Jetpack Compose • Solid understanding of MVVM, Clean Architecture, and scalable app design • Experience building security-sensitive applications (authentication, biometrics, secure storage) • Strong focus on performance optimization and debugging • Experience with CI/CD pipelines (e.g., GitHub Actions, Fastlane) • Hands-on experience with analytics tools (e.g., Mixpanel, RudderStack) • Strong attention to detail and user experience • Ownership mindset and ability to make technical decisions Nice to have • Experience in fintech, banking, or regulated environments • Experience with UIKit ↔ SwiftUI or XML ↔ Compose migrations • Familiarity with modularized or multi-module projects • Understanding of accessibility and localization best practices • Ability to collaborate on backend/API design and troubleshoot integrations What We Offer: • Vacation days: Up to 26 business days per year. • 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types • Health and life insurance (Luxmed) • MyBenefit platform with Multisport option • Internal psychological support service • English language classes from the first working day • Access to external learning platforms: O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training • Flexible workplace: work from the office, from home, or choose a hybrid option • Tech Skills Mentoring Program • Opportunities to develop as a public speaker, mentor, or technical interviewer • Fully paid idle (bench) when not involved in a project • Certification reimbursement (AWS, GCP, Microsoft, etc.)