Senior iOS Software Engineer

Navan; Greater London; Presencial; GBP 70.000 - 110.000; Jornada completa

Descripción de la vacante

Navan is building the next generation of travel and expense AI-powered technology in the UK. We are hiring an iOS engineer to shape how travelers interact with AI-enabled experiences on iOS, focusing on a Swift-first approach.

You will design UX patterns for conversational interfaces, implement production-grade features using async/await, and collaborate across product, design, and backend in a fast, privacy-conscious environment to deliver high-quality mobile experiences.

Formación

• 5+ years of professional iOS development with Swift
• Strong understanding of Swift and iOS SDK, including concurrency and SwiftUI
• Experience with offline storage, networking (REST/WebSocket) and push notifications

Responsabilidades

• Design and ship innovative UX patterns for conversational interfaces and AI-driven experiences on iOS
• Architect and build Swift-first, production-grade features using async/await, structured concurrency and modern iOS APIs
• Lead implementation of context-aware experiences using behavior, preferences, and app state with a focus on performance and privacy
• Use analytics, A/B tests, and logging to iterate on features and improve quality
• Turn complex AI/ML capabilities into simple mobile interactions
• Collaborate across product, design, and backend in a fast-moving environment

Conocimientos

Swift

iOS Development

SwiftUI

Async/Await

MVVM Architecture

REST/WebSockets

Educación

BS in Computer Science or related field

Herramientas

Claude Code

GitHub Copilot

Descripción del empleo

We’re building the next generation of travel and expense (T&E) technology using AI and large language models. Our mobile platform blends cutting-edge AI with strong product and UX so travelers get an intelligent companion, not just another booking app. The app should understand needs, anticipate requests, and deliver personalized help through conversational UI and rich, immersive interactions.

You’ll work at the intersection of AI and mobile, helping define how travelers interact with this kind of product on iOS.

What You’ll Do

• Design and ship innovative UX patterns for conversational interfaces and AI-driven experiences on iOS
• Architect and build Swift-first, production grade features using async/await, structured concurrency and modern iOS APIs
• Lead implementation of context-aware experiences using behavior, preferences, and app state with an emphasis on performance and privacy
• Use metrics, experimentation, and validation (analytics, A/B tests, logging) to iterate on features and improve quality over time
• Turn complex AI/ML capabilities into simple, intuitive mobile interactions
• Use AI tools (e.g., Claude Code / LLM-based coding assistants) to accelerate development while maintaining a high-quality, well-tested codebase
• Collaborate across product, design, and backend in a fast-moving environment

What We’re Looking For

• 5+ years of professional development experience with strong Swift skills, building high quality iOS apps
• Deep understanding of Swift and the iOS SDK, including:
  • Swift concurrency (async/await, Task, actors), structured concurrency, and modern GCD usage
  • SwiftUI for building production UIs; familiarity with UIKit and interoperability is a plus
  • Experience with Combine or other reactive patterns, and when to prefer them vs. async/await
• Strong grasp of iOS architecture (e.g., MVVM, Clean Architecture, modularization) suitable for AI-powered, stateful, and real-time features
• Solid understanding of JSON, REST, WebSockets, streaming APIs and robust networking layers (error handling, retries, offline support)
• Experience with offline storage, background processing, threading and push notifications
• Curiosity about new interaction models (chat, agents, multimodal UI, etc.)
• Experience using AI development tools (e.g., Claude Code, GitHub Copilot, etc.) as part of your workflow, with good judgment about code quality and security
• Familiarity with LLM-driven features (prompt design, integrating LLM APIs, handling latency, fallbacks, guardrails) and/or conversational UX
• Track record building consumer-facing apps; ideally you’ve shipped to the App Store and iterated from user feedback and metrics
• BS in Computer Science or related technical field

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