Senior iOS Engineer
First seen by Alion on Sep 4, 2026.
Job Summary :
We are looking for a Senior iOS Engineer to design, build, and scale high-quality iOS applications used by millions of users. You will play a key role in shaping mobile architecture, driving engineering best practices, while working closely with product, design, and backend teams.
This role requires strong technical depth in iOS, ownership mindset, and experience building production-grade mobile systems.
Key Responsibilities :
iOS Development & Architecture :
- Design, develop, and maintain high-performance iOS applications using Swift.
- Own end-to-end feature development from requirements to release.
- Define and evolve mobile architecture (MVVM / Clean Architecture / Modularization).
- Ensure app scalability, reliability, and maintainability.
- Drive refactoring of legacy code and reduce technical debt.
Performance, Quality & Stability :
- Optimize app performance: startup time, memory, battery, and UI responsiveness.
- Diagnose and fix crashes, ANRs, memory leaks, and performance bottlenecks.
- Implement strong error handling, logging, and monitoring.
- Ensure high test coverage using unit tests, UI tests, and integration tests.
CI/CD & Release Management :
- Build and maintain CI/CD pipelines for iOS (GitHub Actions, Jenkins, Bitrise, etc.).
- Manage App Store releases, TestFlight builds, and versioning strategies.
- Enforce coding standards, code reviews, and release quality gates.
Integrations & Platform Capabilities :
- Integrate REST/GraphQL APIs and handle complex networking scenarios.
- Work with system frameworks: background tasks, push notifications, deep links.
- Integrate third-party SDKs (analytics, crash reporting, feature flags, payments).
- Implement secure data storage, authentication, and encryption best practices.
Required Qualifications :
- 8+ years of professional iOS development experience.
- Strong expertise in Swift and iOS SDKs.
- Deep understanding of UIKit and/or SwiftUI.
- Experience with modern architecture patterns (MVVM, Clean Architecture).
- Strong knowledge of multithreading, memory management, and app lifecycle.
- Hands-on experience with testing frameworks (XCTest, XCUITest).
- Solid understanding of REST APIs, JSON, and networking best practices.
- Experience working with CI/CD pipelines and App Store releases.
- Strong debugging, problem-solving, and communication skills.
Preferred Qualifications :
- Experience with SwiftUI in production.
- Experience building modular or multi-module apps.
- Familiarity with mobile security and compliance best practices.
- Experience with offline-first apps and data synchronization.
- Exposure to observability tools (Firebase, Crashlytics, OpenTelemetry).
- Experience leading or owning major app features or platforms.
Skills
iOS, SWIFT, Objective C, Mobile UI, Mobile App Designing, Mobile App Integration, UIKit, Multithreading, MVVM