Staff Software Engineer, Backend

About Engine 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 30,000 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. We are hiring for Staff Software Engineers, Backend, on multiple teams across our organization. Your application will be considered for any open positions that are a fit. Below the details of the role there is a short description of each team with an opening. Your Mission As a Staff Software Engineer at Engine, you’ll play a vital role in an environment where innovation meets collaboration. Here’s what you’ll take charge of: Design and Implement: Craft innovative software systems and APIs that contribute to the success of Engine’s mission, focusing on scalability, security, and performance. Collaboration: Collaborate with cross-functional teams, including Product and Data Science, to unlock new opportunities and deliver seamless experiences for our customers. Leadership: Mentor mid-to-senior level engineers, and lead efforts to ensure the quality, scalability, and robustness of our software. Ownership: Lead key initiatives that improve efficiency, enhance system performance, and drive customer satisfaction. What You’ll Bring to Engine We’re looking for someone who’s ready to make an impact and grow alongside us: Experience: 8+ years of hands-on experience in designing, implementing, and maintaining highly available and high-performing distributed systems. You have a proven track record of building public-facing (consumer-grade) APIs and managing the complexities of versioning, deprecation, and consumption-based rate limiting. Experience with Node.js, TypeScript, Kotlin (or similar modern backend languages), and AWS is a plus. Skills: You’re a problem-solver with a strong grasp of software design principles, scalability, and system architecture. You thrive in fast-paced, innovative environments and prioritize Domain-Driven Design. Mindset: You’re ready to roll up your sleeves, collaborate, and deliver results that matter. Pricing Team The Pricing team builds the real-time systems that determine what every customer pays across our travel marketplace. We design and operate auction-based pricing engines, models informed by Machine Learning, and customer segmentation strategies — all running at scale across Lodging, Car Rentals, and Flights. Our work directly impacts conversion, revenue, and competitiveness, and the results are immediately measurable IDM Team The Identity Management team owns authentication and authorization for Hotel Engine's customers. We operate the Auth0 tenant, shape the login experience, and partner with enterprise customers to deliver secure, reliable identity integrations — so every traveler, admin, and partner can access the right things, at the right time, with confidence. Lodging Team The Lodging team owns the end-to-end traveler journey, from the first search through checkout and beyond. We build beautiful, intuitive inter