Senior iOS Engineer
Senior iOS Engineer – Design Systems (Contract)
Location: Remote (UK-based)
Duration: 6 months (starting October 2025)
£52.40p/h PAYE 15% BONUS
Hours: 40 per week
Are you passionate about building scalable UI systems and mobile infrastructure that impact millions of users? We’re looking for a Senior iOS Engineer to join a high-performing team responsible for a cross-platform design system that powers some of the most visible features in consumer mobile apps today.
This role is part of a team building the core mobile design infrastructure used across multiple apps within one of the world’s leading tech companies. You’ll be contributing to high-priority initiatives like GenAI integration and account services, while also shaping the future of mobile frameworks.
What You’ll Do:
- Build and support reusable UI components that scale across a family of mobile apps.
- Own the native iOS implementation of design system elements — working in Swift/Objective-C with integrations via PHP/Hack.
- Collaborate with designers, PMs, and infrastructure teams to build visually stunning, high-performance components.
- Deliver high-quality code for new screens, dialogs, carousels, and animations.
- Support ongoing migrations and legacy infrastructure; participate in experimentation and rollout strategies.
- Optional on-call support rotation (once every 6 weeks – standard business hours).
What We’re Looking For:
Must-Have Skills:
- 7+ years of professional experience in iOS development.
- Strong knowledge of PHP or Hack and experience interfacing iOS with backend components.
- 7+ years’ experience with React.
Nice-to-Have:
- Experience in mobile infra or UI component libraries.
- Prior experience at a large tech company or working on cross-app systems.
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