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I'm Jose Marrero, a Senior Frontend Engineer with 9+ years of experience building modern, responsive, and accessible web applications. I'm proficient in React, Next.js, Angular, Vue.js, and TypeScript, delivering scalable design systems, reusable component libraries, and pixel-perfect UIs. I'm passionate about frontend performance optimization and developer experience—lazy loading, code splitting, caching, and SSR—reducing load times by up to 40%. I collaborate with UX designers using Figma and Adobe XD to deliver accessible, responsive experiences, and I have hands-on experience with automated testing (Jest, Cypress, Playwright, Selenium) and CI/CD deployments, ensuring WCAG-compliant accessibility.…I'm Jose Marrero, a Senior Frontend Engineer with 9+ years of experience building modern, responsive, and accessible web applications. I'm proficient in React, Next.js, Angular, Vue.js, and TypeScript, delivering scalable design systems, reusable component libraries, and pixel-perfect UIs. I'm passionate about frontend performance optimization and developer experience—lazy loading, code splitting, caching, and SSR—reducing load times by up to 40%. I collaborate with UX designers using Figma and Adobe XD to deliver accessible, responsive experiences, and I have hands-on experience with automated testing (Jest, Cypress, Playwright, Selenium) and CI/CD deployments, ensuring WCAG-compliant accessibility.

Jose Marrero

Front-End Developer, Web Developer, UI Designer, +2

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I'm Jose Marrero, a Senior Frontend Engineer with 9+ years of experience building modern, responsive, and accessible web applications. I'm proficient in React, Next.js, Angular, Vue.js, and TypeScript, delivering scalable design systems, reusable component libraries, and pixel-perfect UIs. I'm passionate about frontend performance optimization and developer experience—lazy loading, code splitting, caching, and SSR—reducing load times by up to 40%. I collaborate with UX designers using Figma and Adobe XD to deliver accessible, responsive experiences, and I have hands-on experience with automated testing (Jest, Cypress, Playwright, Selenium) and CI/CD deployments, ensuring WCAG-compliant accessibility.…I'm Jose Marrero, a Senior Frontend Engineer with 9+ years of experience building modern, responsive, and accessible web applications. I'm proficient in React, Next.js, Angular, Vue.js, and TypeScript, delivering scalable design systems, reusable component libraries, and pixel-perfect UIs. I'm passionate about frontend performance optimization and developer experience—lazy loading, code splitting, caching, and SSR—reducing load times by up to 40%. I collaborate with UX designers using Figma and Adobe XD to deliver accessible, responsive experiences, and I have hands-on experience with automated testing (Jest, Cypress, Playwright, Selenium) and CI/CD deployments, ensuring WCAG-compliant accessibility.

Available to hire

I’m Jose Marrero, a Senior Frontend Engineer with 9+ years of experience building modern, responsive, and accessible web applications. I’m proficient in React, Next.js, Angular, Vue.js, and TypeScript, delivering scalable design systems, reusable component libraries, and pixel-perfect UIs.

I’m passionate about frontend performance optimization and developer experience—lazy loading, code splitting, caching, and SSR—reducing load times by up to 40%. I collaborate with UX designers using Figma and Adobe XD to deliver accessible, responsive experiences, and I have hands-on experience with automated testing (Jest, Cypress, Playwright, Selenium) and CI/CD deployments, ensuring WCAG-compliant accessibility.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Frontend Engineer at Fiction Kin

November 2, 2023 - October 29, 2025

Led development of scalable frontend architectures using React, Next.js, and Angular, delivering SaaS apps with 30% faster load times. Designed and maintained a TypeScript + Storybook component library, improving cross-team development efficiency. Optimized rendering performance with server-side rendering (Next.js), code-splitting, and lazy loading, reducing time-to-interactive by 45%. Partnered with UX designers in Figma and Adobe XD to implement responsive, accessible, and pixel-perfect designs. Integrated complex GraphQL and REST APIs into frontend workflows, improving data visualization and interactivity. Delivered production-ready apps via Vercel, AWS Amplify, and GitHub Actions.

Software Engineer at Gradient Health

September 1, 2023 - September 1, 2023

Led frontend development with React, Angular, and Next.js, building responsive dashboards and health care portals used by thousands of providers. Improved frontend performance by 35% through advanced caching, bundle optimization, and accessibility compliance (WCAG 2.1). Enhanced UI consistency by building design systems in React + Material UI, reducing redundant styling by 50%. Developed real-time user interfaces integrating GraphQL APIs with health care datasets for accurate provider search. Implemented automated testing suites with Cypress, Jest, and Playwright, ensuring 90% coverage across key frontend features.

Frontend Engineer at Atlassian

December 1, 2019 - December 1, 2019

Built enterprise-grade frontends with React and Angular integrated with Java/Spring Boot and .NET Core backends. Designed responsive dashboards and reporting tools with D3.js, Plotly, and Chart.js. Modernized legacy apps into TypeScript + React frontends, improving maintainability and developer velocity. Deployed apps with Jenkins, GitHub Actions, and Docker, supporting global enterprise rollouts.

Web Developer at Colletty

February 1, 2018 - February 1, 2018

Built patient-facing apps with React, Angular, and Bootstrap/Tailwind, improving UX scores by 25%. Designed responsive layouts and accessibility-first practices, ensuring compliance with health care standards. Collaborated with backend engineers to consume REST APIs and streamline user data entry flows. Improved performance and SEO with SSR and optimized asset delivery.