Senior Web Developer

Yuno is the AI-native operating system of global commerce, powering the financial infrastructure of enterprise merchants, banks, and wallets. Through a single API, Yuno connects them to pay-ins, payouts, fraud prevention, KYC/KYB, and stablecoins globally, integrating 1,000+ payment methods and 460+ integrations in 190+ countries. Global brands including McDonald's, NetEase Games, GoFundMe, and Rappi run their payments on Yuno.

• 5+ years building production applications with React, strong JavaScript and TypeScript skills
• Solid command of modern web stack: Node, CSS, Next.js, Storybook, and Emotion
• Engineering fundamentals including OOP, Git, unit and E2E testing, and CI/CD
• Experience with build and packaging tooling (NPM / yarn), focusing on bundle size and performance
• Experience with AWS (S3, Amplify) and Docker
• Fluent in AI-assisted development tools like Claude Code, Cursor, GitHub Copilot, and leveraging LLMs across design, implementation, debugging, testing, documentation, and code reviews
• Comfortable with autonomy and agile delivery, working end to end in SCRUM
• Advanced proficiency in English, written and spoken

Preferred Qualifications:

• Experience in the payments industry and integrating Payment Service Providers (PSPs)
• Backend experience (e.g., NestJS) and familiarity with backend languages
• Building custom workflows with AI agents, MCP servers, development assistants, or engineering automation platforms

Nice to Have:

• Experience defining AI-driven development practices within an engineering team
• Spanish proficiency

• Create the design system and web components used across third-party applications, ensuring SDK compatibility across browsers, frameworks, and integration environments
• Collaborate with backend and mobile teams to ensure SDK behaves consistently across all platforms and integrations
• Design low-latency, high-availability applications and optimize bundle size, tree-shaking, and build performance for SDK distribution
• Connect user-facing elements with server-side logic and integrate data storage solutions into cohesive, reliable systems
• Write reusable, testable, and efficient code, implementing security and data protection throughout
• Maintain high-quality documentation and developer experience for integrators
• Design automated pipelines for publishing and versioning SDK releases