Principal Engineer - iOS Architecture

Principal Engineer - iOS Architecture | Remote (UK-based) | Up to £200K + Bonus + Equity | Visa + Relocation to London

Our client is redefining how humans and AI collaborate-building an app that empowers millions of users to unlock creativity, productivity, and learning. With a bold vision and a user-obsessed culture, they're scaling fast and hiring a Principal Engineer - iOS Architecture to lead the charge.

This is a high-impact, hands-on leadership role where you'll shape the technical strategy for a cross-platform app used by millions. You'll architect scalable systems, prototype complex solutions, and guide engineering teams through deep technical challenges.

What you'll do:

• Define and evolve the architecture of a high-performance iOS app (Swift)
• Lead system design across mobile and multi-client environments
• Collaborate with product, design, and engineering to deliver elegant, user-centric solutions
• Prototype and solve deep technical challenges-offline-first, real-time collaboration, event-sourced systems
• Champion best practices in modularity, testing, and code quality
• Mentor engineers and influence technical decisions across distributed teams

What you'll bring:

• Proven experience building and scaling B2C mobile products with millions of users
• Deep expertise in iOS architecture and hands-on Swift development
• Strong system design skills and a track record of architectural decisions that scale
• Ability to lead through influence-mentoring, guiding, and inspiring others
• Bonus: experience with collaborative productivity tools, offline-first architecture, or event-sourced systems

Why this role stands out:

• UK-based with remote-first flexibility
• Up to £200,000 base + bonus + meaningful equity
• Visa sponsorship and relocation support to the London office
• Generous benefits: private medical, parental leave, annual offsite, personal development budget, and more
• Sponsored visits to Hong Kong or London every 2 years
• A passionate, distributed team across Europe and Asia that values ownership, curiosity, and collaboration