Principal Architect, React Native/Mobile

Engine

About The Position

At Engine, we’re transforming business travel into something personalized, rewarding, and simple. For too long, managing travel and spend has been overwhelming and fragmented — we’re here to change that. We believe the future of travel should be seamless and powered by technology that delights customers at every step. That’s why we’re building a platform that brings together corporate travel, a powerful charge card, and modern spend management in one place. To make this vision real, we’re looking for exceptional, mission-driven people to help redefine how businesses manage and experience travel. More than 20,000 companies already rely on Engine to support over 1 million travelers and billions in annual bookings each year. Cash flow positive with rapid growth, we pair exclusive Engine-only rates, industry-leading rewards, and intelligent automation to help businesses save money while delivering world-class personalization and convenience. Backed by Telescope Partners, Blackstone, and Permira, Engine has been recognized as one of the fastest-growing travel and fintech platforms in North America, with honors including the Deloitte Fast 500 and Built In’s Best Places to Work. While we’re excited to review your application, please note that our team may be leaning into our unlimited PTO policy to enjoy the holiday season. We appreciate your patience as our responses may be a little slower than usual as we recharge! Your Mission: We are looking for a Principal Archiect to serve as the most senior hands-on technical leader on our mobile team. In this role, you’ll shape the long-term mobile vision, drive technical excellence and work cross-functionally to ensure a seamless, unified experience between our mobile and web platforms. You’ll partner closely with product, design, and web engineering teams to define a cohesive mobile strategy, influence roadmap priorities, and establish consistent architecture, patterns, and development standards. You’ll mentor Staff and Senior Engineers, elevate engineering quality, and be the technical voice guiding our mobile investments and platform evolution.

Requirements

8–12+ years of experience building and shipping high-quality mobile applications at scale
Deep expertise with React Native and experience designing large, production-grade applications
Strong understanding of mobile architecture, performance tuning, and platform best practices
Proven ability to lead technical initiatives and influence cross-functional teams
Strong systems thinking and a bias toward scalable frameworks and reusable patterns
Experience mentoring Staff and Senior Engineers and shaping technical culture
Excellent communication skills and the ability to drive clarity and alignment across teams

Nice To Haves

Experience with native iOS (Swift/SwiftUI) and/or Android (Kotlin/Jetpack) development is a strong plus

Responsibilities

Lead technical direction and long-term architectural vision for our mobile applications (built primarily in React Native)
Act as the principal hands-on contributor, setting standards for engineering quality, performance, and scalability
Drive alignment across mobile and web teams to ensure a consistent and unified user experience
Collaborate with product and design leadership to shape strategy, execution plans, and sequencing for major mobile initiatives
Establish scalable patterns, frameworks, and development standards across the mobile organization
Partner with design and platform engineering on system-wide initiatives such as shared components, navigation, and design systems
Champion engineering excellence through architecture reviews, performance optimization, and technical rigor
Identify and mitigate technical risks while fostering innovation and experimentation
Mentor Staff and Senior Engineers, providing technical guidance and helping to grow future leaders
Act as a mobile subject-matter expert across the broader organization

Benefits

Competitive base pay tied to role and experience, with opportunities for bonuses, commissions, and equity.
Check out our full list at engine.com/culture.
Different roles have different needs in terms of the environments that drive success which is why we have a hybrid-hub model. Whether you are in one of our amazing offices or fully remote, we’ll make sure you have what you need to succeed.

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