[Job-28772] Senior iOS Developer, Brazil

We are tech transformation specialists, uniting human expertise with AI to create scalable tech solutions.With over 8,000 CI&Ters around the world, we’ve built partnerships with more than 1,000 clients during our 30 years of history. Artificial Intelligence is our reality. We are looking for a Senior Mobile Engineer to act as a technical reference for two native mobile applications — one iOS and one Android — that form the core of our agricultural field-monitoring platform. Beyond feature delivery, you will support the team as an advisor on mobile architecture topics, help investigate critical bugs, and conduct performance profiling on both legacy codebases. KEY RESPONSIBILITIES -Technical Reference — Be a go-to engineer for both the iOS and Android applications. -The iOS app is built in Swift (UIKit/SwiftUI, MVVM + Clean Architecture, Realm, Moya, gRPC, Coordinator pattern). -The Android app follows the same architectural model in Kotlin (Room, DataStore, Retrofit, gRPC, Koin, WorkManager, Coroutines). -Contribute to architectural evolution and help standardize patterns across both platforms. -Advisory — Provide technical guidance to peers and product teams on architecture patterns, feasibility assessments, and implementation approaches. -Participate in design reviews and technical planning sessions. -Bug Investigation and Performance Profiling — Investigate critical bugs including crashes, memory leaks, ANRs, database corruption in Realm/Room, and offline sync failures. -Profile performance using Instruments on iOS and Android Studio Profiler/Perfetto on Android. Help triage and prioritize technical debt. -Mentorship and Standards — Conduct code reviews focused on quality and maintainability. -Support junior and mid-level engineers. C ontribute to engineering standards around linting, CI/CD (CircleCI, Fastlane, GitHub Actions), release management, and feature flagging (Rollout.io) REQUIRED QUALIFICATIONS -5+ years in mobile development with solid experience in both iOS (Swift) and Android (Kotlin). -iOS: Swift, UIKit, SwiftUI, Combine, Realm, Moya, gRPC, CocoaPods/SPM. Android: Kotlin, Jetpack libraries, Coroutines/Flow, Room, Retrofit, gRPC, Koin, WorkManager, Gradle. -Solid understanding of MVVM, Clean Architecture, repository pattern, and modularization. -Experience with performance profiling on at least one platform (Instruments, Android Profiler, Perfetto, LeakCanary). -Debugging skills for complex bugs involving crash reports, offline sync, and database issues. -Experience with CI/CD for mobile. Understanding of REST, gRPC/Protocol Buffers, and offline-first strategies. -Good communication skills. PREFERRED QUALIFICATIONS -Experience with Kotlin Multiplatform (KMP), SQLDelight, or shared module architecture. -AgTech or field-data-collection apps with offline-heavy workflows. -Geospatial data handling (Mapbox, MapKit, Google Maps SDK). -App security (obfuscation, jailbreak detection, Keychain, OAuth 2.0/OIDC). -Localization at scale. BDD-style testing (Quick/Nimble) or MockK/JUnit 4. SonarCloud, Datadog, or Sentry experience. If you like it, just apply and good luck! #LI-GV1 We are looking for a Senior Mobile Engineer to act as a technical reference for two native mobile applications — one iOS and one Android — that form the core of our agricultural field-monitoring platform. Beyond feature delivery, you will support the team as an advisor on mobile architecture topics, help investigate critical bugs, and conduct performance profiling on both legacy codebases. KEY RESPONSIBILITIES -Technical Reference — Be a go-to engineer for both the iOS and Android applications. -The iOS app is built in Swift (UIKit/SwiftUI, MVVM + Clean Architecture, Realm, Moya, gRPC, Coordinator pattern). -The Android app follows the same architectural model in Kotlin (Room, DataStore, Retrofit, gRPC, Koin, WorkManager, Coroutines). -Contribute to architectural evolution and help standardize patterns across both platforms. -Advisory — Provide technical guidance to peers and product teams on architecture patterns, feasibility assessments, and implementation approaches. -Participate in design reviews and technical planning sessions. -Bug Investigation and Performance Profiling — Investigate critical bugs including crashes, memory leaks, ANRs, database corruption in Realm/Room, and offline sync failures. -Profile performance using Instruments on iOS and Android Studio Profiler/Perfetto on Android. Help triage and prioritize technical debt. -Mentorship and Standards — Conduct code reviews focused on quality and maintainability. -Support junior and mid-level engineers. C ontribute to engineering standards around linting, CI/CD (CircleCI, Fastlane, GitHub Actions), release management, and feature flagging (Rollout.io) REQUIRED QUALIFICATIONS -5+ years in mobile development with solid experience in both iOS (Swift) and Android (Kotlin). -iOS: Swift, UIKit, SwiftUI, Combine, Realm, Moya, gRPC, CocoaPods/SPM. Android: Kotlin, Jetpack libraries, Coroutines/Flow, Room, Retrofit, gRPC, Koin, WorkManager, Gradle. -Solid understanding of MVVM, Clean Architecture, repository pattern, and modularization. -Experience with performance profiling on at least one platform (Instruments, Android Profiler, Perfetto, LeakCanary). -Debugging skills for complex bugs involving crash reports, offline sync, and database issues. -Experience with CI/CD for mobile. Understanding of REST, gRPC/Protocol Buffers, and offline-first strategies. -Good communication skills. PREFERRED QUALIFICATIONS -Experience with Kotlin Multiplatform (KMP), SQLDelight, or shared module architecture. -AgTech or field-data-collection apps with offline-heavy workflows. -Geospatial data handling (Mapbox, MapKit, Google Maps SDK). -App security (obfuscation, jailbreak detection, Keychain, OAuth 2.0/OIDC). -Localization at scale. BDD-style testing (Quick/Nimble) or MockK/JUnit 4. SonarCloud, Datadog, or Sentry experience. If you like it, just apply and good luck! #LI-GV1 We are looking for a Senior iOS Developer who enjoys challenges to work on the evolution of a 100% native application, building new features and enhancing existing ones. The project operates end-to-end in the client’s solution, providing an environment filled with various challenges. Your mission: Develop features and architectural components. Ensure the quality of the team's delivery through code reviews, static analyzers, and automated tests. Participate in business rituals, and assist in the technical detailing of the solution. Support the structuring of Continuous Delivery by promoting technical discussions and raising important points for the solution. Assist the team in their individual career progression. Work with a focus on results, serving as a reference for the team. You will be responsible for: Developing features and architectural components. Ensuring the quality of the team's delivery through code reviews, static analyzers, and automated tests. Participating in business rituals, and assisting in the technical detailing of the solution. Supporting the structuring of Continuous Delivery by promoting technical discussions and raising important points for the solution. Assisting the team in their individual career progression. Working with a focus on results, serving as a reference for the team. We are looking for individuals who: Have good communication skills to ensure alignment among all team members and the client. Are quality-focused regarding code and good programming practices. Are critical thinkers and seek continuous improvement. Enjoy learning and are willing to contribute to the development of other team members. The requirements for the challenge are: iOS development using Swift. Experience with UIKit and SwiftUI. Solid foundational knowledge of good practices for a modular structure. Experience with development using the MVVM and other design pattern. Advanced English. If you like it, just apply and good luck! #LI-JM2 Our benefits: -Health and dental insurance-Meal and food allowance-Childcare assistance-Extended paternity leave-Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass;-Profit Sharing and Results Participation (PLR);-Life insurance-Continuous learning platform (CI&T University);-Discount club-Free online platform dedicated to physical, mental, and overall well-being-Pregnancy and responsible parenting course-Partnerships with online learning platforms-Language learning platformAnd many more! More details about our benefits here: https://ciandt.com/br/pt-br/carreiras At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. See which data needs to be included in the report by clicking here.This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it. We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side. Apply To This Job