Senior Web Developer

New

YunoPayments technology

Listing location: Poland / Portugal / Brazil / Colombia / Argentina / Spain / EcuadorFull-TimeSenior

Salary not disclosed

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Job Details

Languages: English — advanced proficiency, written and spoken; Spanish proficiency (nice to have)
Experience: 5+ years building production applications with React
Required Skills: AWSNode.jsGitJavascriptTypeScriptNext.jsReactCI/CD

Have 5+ years building production applications with React.
Have strong JavaScript and TypeScript skills.
Have a solid command of Node, CSS, Next.js, Storybook, and Emotion.
Know object-oriented programming (OOP), Git, unit testing, end-to-end testing, and CI/CD.
Have experience with NPM or yarn and build and packaging tooling, with attention to bundle size and performance.
Have experience with AWS, including S3 and Amplify, and Docker.
Use AI-assisted development tools such as Claude Code, Cursor, or GitHub Copilot and leverage LLMs across development tasks.
Own tasks end to end and work comfortably in SCRUM.
Have advanced written and spoken English proficiency.
Preferred: experience in payments and integrating Payment Service Providers (PSPs).
Preferred: backend experience, such as NestJS, and familiarity with backend languages.
Preferred: experience 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 and Spanish proficiency.

Create the design system and web components used across third-party applications.
Ensure SDK compatibility across browsers, frameworks, and integration environments.
Collaborate with backend and mobile teams to maintain consistent SDK behavior across platforms.
Design low-latency, high-availability applications and optimize bundle size, tree-shaking, and build performance.
Connect user-facing elements with server-side logic and integrate data storage solutions.
Write reusable, testable, and efficient code, and implement security and data protection.
Maintain documentation and developer experience for integrators.
Design automated pipelines for publishing and versioning SDK releases.

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