Senior Software Engineer (iOS)

Navan; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Parental leave

Commuter benefits

Healthcare

Flexible Vacation

Health and Wellness

Pet Friendly

IATAN discounts

401k

Job summary

Navan is building the next generation of travel and expense tech with AI on iOS. You will design and ship Swift-first features, craft context-aware, privacy-conscious experiences, and collaborate across product, design, and backend to deliver a polished mobile assistant.

The role emphasizes deep iOS expertise, AI-driven UX, and a strong focus on performance, reliability, and user-centric design, with opportunities to explore state-of-the-art tools.

Qualifications

• 5+ years of professional iOS development with strong Swift skills.
• Shipped iOS apps to the App Store or equivalent.
• Experience with AI features and chat/agents interfaces is a bonus.

Responsibilities

• Design and ship conversational UI patterns and AI-driven experiences on iOS.
• Architect and build production-grade Swift-first features using modern iOS APIs.
• Lead context-aware experiences with performance and privacy focus.
• Use analytics and A/B tests to iterate and improve quality.

Skills

Swift

iOS SDK

SwiftUI

UIKit

Async/await

MVVM/CW Architecture

Networking/REST

GCD/Concurrency

AI tools (Claude Code)

GitHub Copilot

LLM APIs

Testing & Debugging

Education

BS in Computer Science or related

Tools

Claude Code

GitHub Copilot

REST/JSON

WebSockets

Job description

• 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
• 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

Benefits

• Parental leave
• Commuter benefits
• Healthcare
• Flexible Vacation
• Health and Wellness
• Fuel for Connection
• Pet Friendly
• IATAN (travel-related discounts)
• 401k (retirement plan)
• Connectivity Allowance
• Learning & Development

Deep understanding of Swift and the iOS SDK, including:Experience with Combine or other reactive patterns, and when to prefer them vs. async/awaitFamiliarity with LLM‑driven features (prompt design, integrating LLM APIs, handling latency, fallbacks, guardrails) and/or conversational UXSwiftUI for building production UIs; familiarity with UIKit and interoperability is a plusSolid understanding of JSON, REST, WebSockets, streaming APIs and robust networking layers (error handling, retries, offline support)Strong grasp of iOS architecture (e.g., MVVM, Clean Architecture, modularization) suitable for AI‑powered, stateful, and real‑time featuresExperience with offline storage, background processing, threading and push notificationsSwift concurrency (async/await, Task, actors), structured concurrency, and modern GCD usage5+ years of professional development experience with strong Swift skills, building high quality iOS appsExperience using AI development tools (e.g., Claude Code, GitHub Copilot, etc.) as part of your workflow, with good judgment about code quality and securityCuriosity about new interaction models (chat, agents, multimodal UI, etc.)Track record building consumer‑facing apps; ideally you’ve shipped to the App Store and iterated from user feedback and metricsBS in Computer Science or related technical field