Fullstack Software Engineer - Commerce/Partner Success (100% Remote - Japan)

Full-Stack Software Engineer

As a Full-Stack Software Engineer within Hopper Technology Solutions (HTS), you will architect the travel commerce engines powering our rapid expansion into APAC markets. This role is critical to building and localized world-class travel portals for major financial institutions and consumer brands, directly impacting how millions of users in the region experience travel. You will join a high-velocity team responsible for adapting Hopper's market-leading fintech and e-commerce stacks to meet the specific regulatory and consumer demands of the world's fastest-growing travel market.

What Would Your Day-To-Day Look Like

• Design and operate full-stack solutions and APIs optimized for high-scale B2B commerce partnerships across APAC.
• Collaborate closely with product and engineering teams to localize portal features, ensuring seamless integration with regional payment and distribution standards.
• Leverage LLMs and AI tooling to generate production-grade code that accelerates the delivery of partner-specific requirements.
• Develop and maintain gRPC and REST-based microservices that power real-time travel inventory and fintech ancillaries.
• Work autonomously to resolve complex technical challenges while maintaining strong asynchronous alignment with global stakeholders.
• Iterate quickly on engineering improvements that enhance the scalability and performance of our B2B travel ecosystems.

An Ideal Candidate Has

• Extensive experience with React and TypeScript used to build highly localized, performant web interfaces for complex e-commerce environments.

• Proficiency in Scala and distributed systems or a strong desire to apply functional programming to large-scale backend architectures.

• Commercial mindset that prioritizes regional product-market fit and the unique user behaviors found in APAC digital ecosystems.

• Adeptness with AI-driven workflows , including the use of LLMs for development and the implementation of agentic AI systems to enhance partner support.

• Hands-on knowledge of GCP and cloud-native practices , specifically in managing the latency and data residency requirements of international partnerships.

• Strong technical agility and the ability to fearlessly navigate unknown codebases to deliver high-impact features under tight commercial deadlines.

Perks and benefits of working with us:

• Well-funded and proven startup with large ambitions, competitive salary and upsides of pre-IPO equity packages.

• Hopper provides a monthly allowance for our employees in Japan to help reduce costs related to EHI premiums and out of pocket medical expenses.

• Unlimited PTO.

• Work-from-home stipend.

• Access to co-working space on demand through FlexDesk.

• Please ask us about our very generous parental leave, much above industry standards!.

• Carrot Cash travel stipend.

• Hopper provides a cash benefit for employees to put towards retirement.

• An entrepreneurial culture where pushing limits and taking risks is everyday business.

• Open communication with management and company leadership. Small, dynamic teams = massive impact.

More About Hopper

At Hopper, we are on a mission to become the leading travel platform globally – powering Hopper's mobile app, website and our B2B business, HTS (Hopper Technology Solutions). By leveraging massive amounts of data and advanced machine learning algorithms, Hopper combines its world-class travel agency offering with proprietary fintech products to bring transparency, flexibility and savings to travelers globally. We have developed several unique fintech solutions that address everything from pricing volatility to trip disruptions – helping people travel better and save more on their trips.

The Hopper platform serves hundreds of millions of travelers globally and continues to capture market share around the world. The Hopper app has been downloaded over 120 million times and has become largely popular among younger travelers – with 70% of its users being Gen Z and millennials.

While everyone knows us as the Gen Z and Millennial travel app, Hopper has evolved to become much more than that. In recent years, we've grown into a travel fintech provider, commerce platform, and global travel agency that powers some of the world's largest brands.

Through HTS, our B2B division, the company supercharges its partners' direct channels by integrating our fintech products on their sites or powering end-to-end travel portals. Today, our partners include leading travel brands like Capital One, Nubank, Air Canada, and many more.

Here are just a few stats that demonstrate the company's recent growth:

Billions of dollars worth of travel and travel fintech are sold through Hopper and HTS' channels every year.

Our fintech products – including Cancel for Any Reason and Flight Disruption Assistance – have exceptionally strong CSAT because the terms are always clear, and customers receive instant, no-questions-asked resolutions.

Almost 30% of our app customers purchase at least one fintech product when making a booking; and consumers are 1.6x more likely to repurchase if they add fintech to their booking vs if they booked just travel.

Given the success of its fintech products, Hopper launched a B2B initiative, HTS (Hopper Technology Solutions), which represents more than 75% of the business.

Through HTS, any travel provider (airlines, hotels, banks, travel agencies, etc.) can integrate and seamlessly distribute Hopper's fintech or travel inventory on their direct channels. As its first HTS partnership, the company partnered with Capital One to co-develop Capital One Travel, a new travel portal designed specifically for cardholders. Other HTS partners include Air Canada, Uber, CommBank, Nubank, Flair Airlines and many more.

Hopper has been named the #1 most innovative company in travel by Fast Company Hopper has been downloaded over 120 million times and continues to have millions of new installs each month. Hopper is now the #3 largest online travel agencies in North America and 70% of our app customers are Gen-Z and millennials travelers.

Hopper has raised over $750 million USD of private capital and is backed by some of the largest institutional investors and banks in the world. HTS is primed to continue its growth as the leading travel ecommerce provider in a $1 trillion online shopping category. The Hopper app and website will also continue to be the preferred travel provider for Gen Z and Millennials.

Come take off with us!