iOS Engineer (up to £150k)

Dex; Greater London; On-site; GBP 85,000 - 100,000; Full time

Job summary

Dex is building a native iOS app to complement its AI workspace for major financial institutions. You will own the entire iOS stack from architecture and offline behavior to testing and release, shaping how the product feels on iPhone and iPad.

You will collaborate with Design, Product, and web engineering to translate surface ideas into polished mobile experiences while maintaining a coherent design system and scalable architecture for a growing team.

Qualifications

• Built and shipped native iOS apps in Swift/SwiftUI.
• Strong knowledge of mobile interaction patterns and offline behavior.
• Experience designing scalable iOS architecture for growing teams.
• Maintained an iOS design system for long-term maintainability.
• Able to adapt complex web surfaces to native experiences with cross-functional teams.

Responsibilities

• Rebuild existing web products as native iOS experiences, deciding what translates directly and what needs reshaping for mobile.
• Define the entire iOS architecture, including interaction patterns, offline behavior, notifications, and performance standards.
• Own the iOS design system, ensuring coherence and maintainability as the product scales.
• Set up and maintain testing, observability, and release pipelines for a production-grade native application.
• Collaborate with Design, Product, and web engineering teams to adapt existing surfaces without losing core intent.

Skills

Swift

SwiftUI

iOS architecture

Design system

Cross-functional collaboration

Job description

The Role

This company builds the AI workspace that the world's largest banks and regulated institutions run their document-heavy work inside. They're growing rapidly, backed by leading investors, and transforming how major financial institutions produce and validate client-ready work.

They've shipped everything on the web, but now need a native iOS app — not a wrapper, but a proper, performant experience for iPhone and iPad. You'll own the entire iOS architecture, from interaction patterns and offline behavior to testing and release. This isn't just implementing features; it's defining the mobile future for a product used by global teams.

The Work

• Rebuild existing web products as native iOS experiences, deciding what translates directly and what needs reshaping for mobile.
• Define the entire iOS architecture, including interaction patterns, offline behavior, notifications, and performance standards.
• Own the iOS design system, ensuring coherence and maintainability as the product scales.
• Set up and maintain the testing, observability, and release pipelines for a production-grade native application.
• Collaborate directly with Design, Product, and web engineering teams to adapt existing surfaces without losing their core intent.

What You Bring

• You've built and shipped native iOS applications in Swift and SwiftUI, with clear ownership of end-to-end delivery.
• You have strong judgment on mobile interaction patterns and offline behavior, understanding caching, syncing, and graceful degradation.
• You've designed iOS architecture that has scaled with a growing team and product, beyond a single, isolated app.
• You've owned and maintained an iOS design system, prioritizing its long-term maintainability.
• You're comfortable adapting complex product surfaces from web to native, working closely with cross-functional teams.