Contract iOS Developer

Two Circles; London; Hybrid; GBP 125,000 - 150,000; Full time

Job summary

A leading company is seeking an iOS Contract Engineer for a 6-month project based in London with a focus on building modern, scalable applications for top sports brands. The role offers a vibrant hybrid environment that ensures collaboration and is ideal for someone with deep technical expertise and a passion for high-quality mobile application development.

Qualifications

• Proven expertise in Swift and SwiftUI with multiple apps shipped.
• Strong understanding of scalable app architectures like MVVM-C.
• Comfortable working in CI/CD environments.

Responsibilities

• Build and maintain high-quality iOS applications using Swift and SwiftUI.
• Contribute to architectural decisions focused on scalability and performance.
• Collaborate with cross-functional teams to ship new features.

Skills

Swift

SwiftUI

UI/UX Design

Scalable app architectures

Agile development practices

CI/CD environments

Testing (unit, integration, UI)

Tools

Bitrise

CircleCI

GitHub Actions

Azure DevOps

Job description

6 Month Contract - Outside IR35

About Us:

As part of our exciting growth journey, we’re expanding our Mobile Engineering team and are on the lookout for a talented iOS Contract Engineer to join us on a hybrid basis at our London office.

This is a rare chance to work on high impact greenfield products for some of the biggest and most iconic sports brands in the world. You’ll be at the forefront of building modern, scalable apps from the ground up, helping shape the future of fan engagement across global sport.

As a contractor, you’ll bring deep technical expertise and strong delivery focus. Contributing high-quality code, collaborating closely with our in-house teams, and helping us hit key milestones.

You’ll be embedded in a passionate, cross-functional team and supported to do your best work while working on fast-moving, purpose-driven projects that reach millions of fans worldwide.

• Build and maintain high-qualitynative iOS applicationsusingSwift and SwiftUI, with a focus on fast delivery and maintainable architecture.
• Work closely with internal teams and client stakeholders to developend-to-end mobile featuresthat align with product goals and timelines.
• Contribute to architectural decisions in collaboration with senior engineers — with a strong emphasis onscalability,testability, andperformance.
• Collaborate withincross-functional squads(designers, PMs, QA, backend) to ship new features to live apps used by sports fans worldwide.
• Ensure a high standard of quality throughcode reviews,testing, andengineering best practices.
• Join a hybrid working environment, with2 days per week in our London officeto enable strong collaboration on fast-moving projects.

What We’re Looking For

• Proven expertise inSwiftandSwiftUI, ideally with multiple apps shipped to the App Store or in production use.
• Strong understanding of scalable app architectures (e.g.MVVM-C,TCA,modularisation,dependency injection).
• Passion for delivering high-qualityUI/UXthat adapts well across screen sizes and device types.
• Comfortable working inCI/CD environments, using tools likeBitrise,CircleCI,GitHub Actions, orAzure DevOps.
• Hands-on experience withagile development practices, and a pragmatic approach to testing including unit, integration, and UI testing.

Nice To Have

• Experience working onsports, media, or gamification apps, particularly those with high user engagement or real-time data.
• Familiarity withlive data integration, streaming APIs, or event-based user experiences.
• Personal passion or understanding ofsports.