About us
xPay is a Y Combinator backed international payments company building an international payment gateway focused on cross-border payments — making it dramatically easier for businesses to move money across borders. Our customers are B2B SaaS companies who need fast, reliable, and cost-effective payment infrastructure to serve global users.These businesses are increasingly moving their international volumes from billion dollar companies to xPay as we expand our footprint across 180+ countries and support 25+ currencies. Since January 2025, we have grown 73× and now process over 1 million transactions every month.
Cross-border payments is a $200 trillion market. Our top customers include Publicly Listed, Series D and Series E companies across various sectors like EdTech and Travelling processing millions through us every month.
The Role
We're looking for a Fullstack Engineer to build the systems and interfaces that power global transactions for thousands of merchants. This is a hands-on role for someone who has thrived in an early-stage or small-team environment and gets energized by shipping features that directly move revenue for businesses across the world.
What You'll Do
Build the core services and interfaces that drive high-scale, global payment flows - owning features end-to-end from API to UI
Work directly with product and design to ship features rapidly from idea to production, and contribute to refining our design system for visual consistency
Design and ship frontend in React, TypeScript, Tailwind, and TanStack/React Query
Design and ship production-grade backend services in Java, Spring Boot, and MongoDB
Improve performance across the stack - from database queries and service latency to frontend rendering - through better patterns and architecture
What We're Looking For
3–5 years of experience as a fullstack engineer, preferably at an early-stage startup or on a small team where you owned outcomes end-to-end
Strong working knowledge of React, TypeScript, Tailwind, and TanStack/React Query — we are not flexible on the frontend stack
Solid backend fundamentals — we use Java, Spring Boot, and MongoDB, but we're flexible here. If you're strong in another stack (Node.js, Go, Python, Kotlin, etc.) and willing to ramp up on ours, we'd love to talk
Comfort moving fluidly between backend and frontend within the same feature — solid instincts for API design, data modeling, and system tradeoffs
Strong sense of UX and visual design, and an eye for polished interfaces
Strong communication skills, curiosity, speed, and willingness to learn in a high-growth environment
Why this role is interesting
Payments infrastructure at global scale - real, complex problems with immediate impact on thousands of merchants
Direct access to founders. Real influence on product and architecture. Clear path to grow into a senior or lead role
Meaningful equity. Early team member - we treat the role that way