Senior (iOS) Software Engineer

Navan; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Navan is building the next generation of travel and expense technology. We are seeking a senior iOS engineer to design and ship AI-driven UX patterns on iOS, focusing on performance, privacy, and seamless mobile interactions.

You will work at the intersection of AI and mobile, shaping how travelers interact with cutting-edge features on iOS. You will use Swift, SwiftUI, and modern concurrency to craft context-aware experiences, collaborate with product and backend teams, and leverage AI tooling

Qualifications

• 5+ years of professional iOS development experience.
• Strong Swift skills and iOS SDK mastery.
• Experience with Swift concurrency (async/await, actors).
• Proficient in SwiftUI; UIKit knowledge a plus.

Responsibilities

• Design and ship UX patterns for conversational interfaces and AI-driven experiences on iOS.
• Architect and build production-grade features using Swift and modern iOS APIs.
• Lead implementation of context-aware experiences with emphasis on performance and privacy.
• Use analytics, A/B tests, and logging to iterate and improve features.

Skills

Swift

SwiftUI

async/await

iOS architecture

JSON/REST

Combine

Push notifications

Xcode

Education

BS in Computer Science

Tools

Claude Code

GitHub Copilot

Xcode

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.

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

Navan uses AI-assisted Automated Employment Decision Tool (Metaview) to assist with evaluating resumes against job qualifications for this role. All final decisions are made by human recruiters and hiring managers.

Human oversight: Metaview does not automatically reject candidates or make final hiring decisions. Our recruiters and hiring managers review all outputs and make the final hiring decision regarding every application.

Navan (Nasdaq: NAVN) is the global AI-powered business travel and expense platform that makes travel easy for frequent travelers. From finding flights and hotels, to automating expense reconciliation, with 24/7 support along the way, Navan delivers an intuitive experience travelers love and finance teams rely on. See how Navan customers benefit and learn more at navan.com .

Culture of Excellence

Our team is our competitive edge — a high-performance group of smart, driven people committed to winning together. This dedication to excellence is why we’ve been recognized as a Best Place to Work by Built In (2023–2026), a G2 Best Global Software Company (2025–2026), Forbes Cloud 100 (2022–2025), and CNBC Disruptor 50 (2022–2025). At Navan, we provide an environment where top talent excels, offering the autonomy and fast-paced trajectory needed to build a defining career and do the best work of your life.

Navan offers a comprehensive benefits program designed to support your well-being, financial security, and life outside of work. Our benefits, thoughtfully tailored by country to meet local needs, include healthcare coverage, insurance offerings, and wellness resources for you and your family.

We support long-term financial growth through retirement savings programs and opportunities to participate in our equity plans, so you can share in Navan’s success. To promote balance, we offer flexible time off, country-specific holidays, and paid parental leave for all new parents. Additional benefits include connectivity and commuting support*, mental health resources, and exclusive travel-related perks. Wherever you’re based, our benefits evolve with you.

Workplace Policy

Navan believes in the value of in-person connections, whether that’s sitting down to have lunch with one another, taking a walking 1:1, or collaborating in a room together. The connections forged through face-to-face interactions improve company culture and drive business results. Navan invests in global office spaces — in the U.S., Europe, and Asia, among others — that feel welcoming. In-office perks such as company-provided lunches and happy hours create a strong team environment to help you do your best work. Our employees work from the office four days a week. Please expect this policy for all roles that are tied to an office.

Accommodations

Navan complies with the Americans with Disabilities Act (ADA), as amended by the ADA Amendments Act, and all applicable state or local law. Navan will reasonably accommodate qualified individuals with a disability in connection with applications for employment as required by law.

As part of the recruitment process, certain personal data may be processed using automated tools, including tools that use AI. For details on how Navan collects and uses your personal data, please review Navan's Candidate Privacy Notice here .