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

ABOUT THE ROLE 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 (such as CommBank and Trip.com http://Trip.com), 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. he Hopper app has been downloaded over 120 million times and has become largely popular among younger travelers – with