Senior iOS Engineer
Posted 2 weeks ago by Aquent
£52 Per hour
Inside
Remote
Tottenham, England, United Kingdom
Summary: The Senior iOS Engineer role focuses on developing scalable UI systems and mobile infrastructure for a leading tech company. This contract position involves building core mobile design infrastructure and contributing to high-priority initiatives, including GenAI integration. The engineer will work closely with designers and PMs to create high-performance components that enhance user experience across multiple apps. The role requires extensive experience in iOS development and collaboration with cross-functional teams.
Key Responsibilities:
- 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).
Key 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.
- Experience in mobile infra or UI component libraries (nice-to-have).
- Prior experience at a large tech company or working on cross-app systems (nice-to-have).
Salary (Rate): £52.40 hourly
City: Tottenham
Country: United Kingdom
Working Arrangements: remote
IR35 Status: inside IR35
Seniority Level: Senior
Industry: IT
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).
Must-Have Skills What We’re Looking For:
- 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.
Client Description
Our Client is the largest social media company in the world. They have substantial B2B and B2C advertising and media platforms, as well as a nonprofit initiative. With the mission of bringing people together, they now boast over 2 billion users, and are rapidly developing as they influence the world around us. Aquent is dedicated to improving inclusivity & is proudly an equal opportunities employer. We encourage applications from under-represented groups & are committed to providing support to applicants with disabilities. We aim to provide reasonable accommodation for any part of the employment process, to those with a medical condition, disability or neurodivergence.