Senior iOS Engineer (Contract) | Swift, UIKit, MVVM, Snapshot Testing, ActivityKit | High-Traffic Consumer App | £400/day | Remote (UK) | 6-Month initial Contract, Likely extensions | Outside IR35 at Owen Thomas | B Corp™, United Kingdom, £400 per day

Senior iOS Engineer (Contract) | Swift, UIKit, MVVM, Snapshot Testing, ActivityKit | High-Traffic Consumer App | £400/day | Remote (UK) | 6-Month initial Contract, Likely extensions | Outside IR35

We’re hiring a Senior iOS Engineer (contractor) to join a cross-functional product team delivering high-quality mobile experiences for a widely used, consumer-facing platform.

You’ll be joining a collaborative, quality-driven environment where engineering excellence, performance, and user experience are taken seriously.

This is a 6-month initial contract, ideal for senior engineers who enjoy owning technical decisions, mentoring others, and shipping production-grade features in complex environments.

The Role | Senior iOS Engineer (Contract) | Swift, UIKit, MVVM, Snapshot Testing, ActivityKit | High-Traffic Consumer App | £400/day | Remote (UK) | 6-Month initial Contract, Likely extensions | Outside IR35

This is a hands-on senior role with strong influence across both delivery and technical direction.

You’ll be expected to:

• Contribute to the delivery of new features within a high-traffic mobile application
• Work closely with product owners and stakeholders to shape solutions
• Build and maintain scalable, high-performance iOS applications
• Write clean, well-tested, and maintainable code aligned with best practices
• Participate in architectural discussions and technical decision-making
• Conduct thorough code reviews and uphold engineering standards
• Mentor and support other engineers within the team
• Drive continuous improvement across code quality, performance, and processes

This role suits engineers who take pride in craftsmanship, enjoy mentoring, and thrive in collaborative, product-led teams.

Senior iOS Engineer (Contract) | Swift, UIKit, MVVM, Snapshot Testing, ActivityKit | High-Traffic Consumer App | £400/day | Remote (UK) | 6-Month initial Contract, Likely extensions | Outside IR35

Strong, recent experience with:

• Native iOS development in production environments using Swift
• Building complex UI using UIKit (programmatically, no Storyboards/XIBs)
• iOS architectural patterns (MVVM + Coordinators)
• Performance optimisation and profiling (memory, responsiveness)
• Automated testing:
• Unit testing (XCTest / Swift Testing)
• UI testing (XCUITest)
• Snapshot testing (e.g. Point-Free SnapshotTesting or similar)
• CI/CD pipelines and build tooling (e.g. CircleCI, Fastlane)
• Dependency management (SPM, CocoaPods)
• Strong understanding of SOLID principles and scalable architecture
• Clear communication with both technical and non-technical stakeholders

Nice to Have

• Experience with Live Activities / ActivityKit / Dynamic Island
• Widget development using WidgetKit
• Exposure to Objective-C codebases
• Experience working with or alongside React Native
• Previous experience mentoring engineers or leading technical initiatives

Why This Contract Stands Out | Senior iOS Engineer (Contract) | Swift, UIKit, MVVM, Snapshot Testing, ActivityKit | High-Traffic Consumer App | £400/day | Remote (UK) | 6-Month initial Contract, Likely extensions | Outside IR35

• £400 per day
• Fully remote (UK/EU-based contractors welcome)
• Outside IR35
• High-impact work on a widely used consumer product
• Strong engineering culture with a focus on quality and performance
• Opportunity to influence technical direction, not just deliver tickets
• Collaborative, cross-functional team environment
• Clear scope with meaningful delivery outcomes over 6 months, likely extensions

This is not a greenfield rebuild - it’s a high-quality engineering environment where you’ll work on a real product at scale, contribute to technical decisions, and help shape the evolution of a mature iOS platform.

Please apply HERE and WE will be in touch if it looks like a strong match.

Senior iOS Engineer (Contract) | Swift, UIKit, MVVM, Snapshot Testing, ActivityKit | High-Traffic Consumer App | £400/day | Remote (UK) | 6-Month initial Contract, Likely extensions | Outside IR35