iOS Engineer - Contract Opportunity (Inside IR35)

Location: London, UK (3 days onsite)
Contract Duration: Initial contract until December 2026
Rate: Up to £500/day Inside IR35

Overview

We are seeking an experienced iOS Engineer to join a high-performing mobile engineering team delivering enterprise-scale digital products used by millions of customers globally. This role offers the opportunity to work on modern, customer-facing mobile applications within a collaborative Agile environment.

The successful candidate will contribute to the development of scalable, high-quality iOS applications while working closely with product, design, QA, and engineering teams.

Key Responsibilities

• Design, develop, and enhance native iOS applications using modern development practices
• Collaborate with cross-functional teams to deliver intuitive and high-performing mobile experiences
• Write clean, maintainable, and testable Swift code
• Integrate mobile applications with RESTful APIs and Back End services
• Participate in code reviews and contribute to engineering best practices
• Support CI/CD processes and automated build pipelines
• Troubleshoot and resolve performance and production issues
• Contribute to continuous improvement initiatives across the engineering function

Required Experience

• Strong commercial experience developing native iOS applications
• Proficiency in Swift and exposure to Objective-C
• Experience with modern iOS architectural patterns such as MVVM and modular architectures
• Knowledge of unit and UI testing frameworks including XCTest/XCUITest
• Experience working with CI/CD tooling such as GitHub Actions, CircleCI, or similar
• Familiarity with REST APIs and mobile integration patterns
• Comfortable working in Agile delivery environments
• Strong communication and stakeholder collaboration skills