Sr. Software Engineer, iOS

About the role

Navan is transforming business travel and expense management with AI and large language models. This role focuses on developing the next generation of our mobile platform, which acts as an intelligent travel companion. You will contribute to creating a conversational user interface that understands user needs and provides personalized assistance. The position requires deep collaboration with cross-functional partners to define product direction and technical feasibility for AI features. You will play a key role in shaping the user experience of cutting edge mobile applications. This role is centered on delivering high performance and secure mobile solutions for enterprise grade travelers. Your work will directly influence how users interact with complex AI systems through a simple and intuitive mobile interface.

Key facts

What you'll do

• Design and implement innovative user experiences for AI driven conversational interfaces on iOS.
• Build production ready features using Swift, async await, structured concurrency, and modern iOS APIs.
• Lead the development of context aware experiences, considering user behavior, preferences, and application state, with a focus on performance and data privacy.
• Utilize metrics, A B testing, and analytics to refine features and enhance quality.
• Translate complex AI and ML functionalities into simple and intuitive mobile interactions.
• Accelerate development using AI coding tools while maintaining a high-quality, well tested codebase.
• Collaborate with product, design, and backend teams in a fast paced environment.
• Architect and maintain a robust networking layer to handle streaming APIs and WebSockets for real time interactions.
• Implement intelligent offline support and background processing to ensure reliability in varying connectivity conditions.
• Optimize application performance, memory usage, and battery efficiency for a seamless user experience.
• Integrate and configure third party AI SDKs and LLM APIs while managing latency, error handling, and fallback strategies.
• Champion data privacy and security best practices across the mobile stack and user workflows.
• Conduct code reviews and mentor junior engineers to uphold code quality and architectural standards.
• Iterate on features based on user feedback, product analytics, and emerging interaction models such as chat and multimodal UI.

Requirements

• 5 or more years of professional development experience building high-quality iOS applications with strong Swift skills.
• Deep understanding of Swift and the iOS SDK, including Swift concurrency (async/await, Task, actors), structured concurrency, and modern GCD.
• Experience with SwiftUI for production UI development; familiarity with UIKit and its interoperability is a plus.
• Knowledge of Combine or other reactive patterns and when to apply them versus async/await.
• Strong grasp of iOS architectural patterns (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 (including error handling, retries, and offline support).
• Experience with offline storage, background processing, threading, and push notifications.
• Curiosity about new interaction models such as chat, agents, and multimodal UI.
• Experience using AI development tools (e.g., Claude Code, GitHub Copilot) in your workflow, with good judgment regarding code quality and security.
• Familiarity with LLM driven features (prompt design, integrating LLM APIs, handling latency, fallbacks, and guardrails) or conversational UX.
• Proven track record of building consumer facing applications, ideally having shipped to the App Store and iterated based on user feedback and metrics.
• Bachelor of Science degree in Computer Science or a related technical field.

Nice to have

• Experience with large scale language models and production AI integrations.
• Knowledge of cloud platforms and backend services used to support mobile applications.
• Familiarity with accessibility standards and inclusive design principles.

Practical notes

The anticipated salary range for this position is $113,400 to $252,000 USD, which may include base salary and target incentive compensation. Actual compensation will be determined by factors such as location, skills, experience, and market demands. Employees are expected to work from the office four days a week. Navan offers comprehensive benefits including healthcare, insurance, wellness resources, retirement savings, equity plans, flexible time off, and paid parental leave.