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Tristan Warner-Smith

@tristanwarnersmith

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Lead mobile engineer specialising in native iOS development, AI-driven apps.

United Kingdom

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What I'm looking for

I seek hands-on leadership roles building native mobile products with strong engineering practices, collaborative teams, and opportunities to apply AI and real-time features.

I am a pragmatic, passionate mobile engineer with extensive experience designing and building native iOS and cross-platform mobile apps. I champion continuous learning, early adoption of modern tools, and strong UI/UX sensibilities to deliver polished, user-focused products.

As a hands-on engineering leader, I have grown and mentored teams, introduced engineering best practices, and led greenfield and large-scale refactors across iOS, Android and backend integrations. I emphasise collaboration, pair/mob programming, and agile processes to increase velocity and quality.

Technically, I have led projects using Swift, SwiftUI, Swift Concurrency, Combine, Kotlin Multiplatform, ARKit and real-time media tooling such as LiveKit, plus backend work with TypeScript, Python and GraphQL. I have driven architecture improvements including modularisation, dependency injection, and CI/CD automation.

I focus on building reliable, testable systems and developer workflows—improving code consistency, test automation, and release ownership—while delivering engaging product experiences, accessibility, and measurable quality improvements.

Experience

Work history, roles, and key accomplishments

Current

Founding iOS Engineer

Current

Stealth AI Edtech Startup

Dec 2025 - Present (1 month)

Led greenfield development of a native iOS AI conversational companion for children’s education, delivering real-time voice conversations, interactive drawing activities, and modular domain architecture to enable testability and reuse.

Swift SwiftUI LiveKit AsyncStream Xcode Cloud SVG CAShapeLayer

Lead Engineer

Reveri Health

Apr 2022 - Dec 2025 (3 years 8 months)

Grew and led the mobile engineering team, introduced Swift Concurrency and SPM modularisation, and delivered near-real-time conversational AI experiences by linking mobile clients to backend agents.

Swift SwiftUI Combine KMP LiveKit OpenAI SPM CI CD

Apps Lead Engineer

Fuel3D

Mar 2020 - Apr 2022 (2 years 1 month)

Founding mobile engineer who led design and development of AR face measurement and virtual glasses shopping apps using SwiftUI and ARKit while establishing CI/CD, testing, and accessibility practices.

Swift SwiftUI ARKit Combine Redux TDD CI CD Accessibility

Senior iOS Engineer

Expedia Inc - Hotels.com

Apr 2018 - Apr 2020 (2 years)

Implemented REDUX and CLEAN architecture to improve testability and maintainability, delivered multi-month Travel Guides feature using VIPER and TDD, and improved cross-team agile processes.

Swift Objective C Redux VIPER TDD Fastlane Design Patterns

App Team Lead

EveryLIFE Technologies

Jan 2016 - Jan 2018 (2 years)

Led a cross-platform team delivering iOS, Android and Xamarin apps from prototype to production, improved quality and reduced crash rates while driving agile practices and API design.

iOS Android Xamarin Kotlin Swift C++API Design Automated Testing

Senior Mobile Developer

Compsoft Plc

Jan 2007 - Oct 2016 (9 years 9 months)

Technical architect and lead across mobile and web projects, refactored large JavaScript codebases to TypeScript, and delivered award-winning iOS apps for major clients while owning full product lifecycle.