Senior Web Developer

About the role

Yuno is looking for a Senior Web Developer to join its Core Checkout Team. You will help build and maintain the payment infrastructure that powers global brands, delivering high‑performance SDKs and web components for merchants worldwide.

Key responsibilities

• Integrate user‑facing elements created by front‑end developers with server‑side logic.
• Write reusable, testable, and efficient code for low‑latency, high‑availability applications.
• Implement security, data‑protection measures and integrate data‑storage solutions.
• Create design systems and web components for third‑party applications.
• Ensure SDK compatibility across browsers, frameworks, and integration environments.
• Optimize bundle size, tree‑shaking, and build performance for SDK distribution.
• Collaborate with backend and mobile teams to keep SDKs consistent across platforms.
• Maintain high‑quality documentation and improve developer experience for SDK integrators.
• Design and maintain automated pipelines for publishing and versioning SDK releases.

Required profile

• Minimum 3 years of professional experience with React.
• Advanced written and spoken English for international collaboration.
• Strong knowledge of JavaScript, React, Node.js, CSS, Git and NPM.
• Experience with unit testing, end‑to‑end testing and CI/CD pipelines.
• Ability to work autonomously and follow Scrum processes.

Required skills

• TypeScript, OOP, Yarn
• NestJS, Next.js, Storybook, Emotion
• AWS services (S3, Amplify)
• Docker, Bitbucket
• AI‑assisted development tools (Claude Code, Cursor, GitHub Copilot, ChatGPT or similar)
• Large Language Model (LLM) integration for design, debugging, testing and documentation