Product UI & Frontend
Modern interfaces with React and Next.js focused on speed and UX.
- • UI/UX design and design systems
- • Core Web Vitals optimization
- • WCAG accessibility
Ray MartínFullstack Product Developer
Download CV — EN (Hero)
4+
years of experience
10+
projects completed
Performance (CWV)Accessibility (WCAG)Security & Authentication
Next.jsTypeScriptTailwind CSSReact NativeExpoPostgreSQLPrismaZod
Services
Backend & Integrations
Robust APIs, event-driven workers and integrations like Stripe, Sumsub and Magic Link.
- • REST/GraphQL API integration
- • Data modeling and performance
- • Prisma, Supabase and PostgreSQL
- • Stripe payments, billing and webhooks
- • Sumsub eKYC and automated compliance flows
- • Web3 wallets and Magic Link onboarding
Security & Auth
Anti‑abuse protection and secure access without friction.
- • Anti‑bots and validations (invisible captchas)
- • Rate‑limiting and endpoint protection
- • Authentication with Google, Apple, GitHub
- • Secure middlewares and session best practices
DevOps & Delivery
Reliable, observable releases.
- • CI/CD with Vercel and GitHub Actions
- • Edge and smart caching
- • Monitoring and alerts
Experiences
Fullstack Product Developer
2025 - Current
Freelance
Freelance Developer
01/2021 - 12/2024
Freelance
Front end Developer
11/2021 - 12/2022
Metary Platform
Data Analyst
06/2020 - 05/2021
ButlerScientific, S.L.
Front end Developer
05/2019 - 06/2020
Raúl López
Skills
- Product UI & Front-End Systems
- Next React React Native iOS Android HTML CSS JavaScript TypeScript TailwindCSS Responsive Design
- Back-End Development
- Node Expo PostgreSQL Prisma Supabase Docker SQL AdonisJS Express Firebase Stripe Sumsub eKYC Magic Link Web3 / Wallets
- Software
- Vercel Github Expo App's Services Postman Insomnia Zapier Trello Jira Figma Dbngin Heroku Postico
- Languages
- Spanish English French
- Methodologies
- Agile Scrum Kanban Lean Design Thinking
- Career and education
- Responsive Web Design JavaScript Algorithms and Data Structures Tourism Degree ULPGC
Modern UI/UX design with React, Next.js and Tailwind CSS
Server-side development with Node.js, Prisma and Supabase
Development with Next.js, React and Expo
Fully responsive web applications and websites
Database management with PostgreSQL, Prisma and Firebase
REST/GraphQL APIs, Stripe, Sumsub (eKYC), Magic Link and Web3 integrations
Version control with Git and GitHub
Automated deployment with Vercel and Expo
Clear and structured code documentation
Cloud services management (AWS, GCP, Vercel)
Mobile app development with React Native and Expo
Unit, integration and E2E testing
CI/CD automation with GitHub Actions
Web security and vulnerability protection
Web performance optimization and monitoring
WCAG-compliant accessible development
Analytics integration and monitoring
About me
Fullstack product developer leading the entire lifecycle from discovery to launch. I ship with Next.js 14, React, Node.js, PostgreSQL and edge runtimes to build fast, accessible experiences.
I integrate platforms such as Stripe (payments/billing), Sumsub (KYC/AML), Magic Link and custom Web3 wallets to guarantee secure onboarding, compliance and automation.
Still freelancing, partnering with startups and scale-ups to deliver measurable impact through Core Web Vitals, observability and maintainable architectures.
Projects and works
4Pets Website
Animal management platform with web in Next 14/15 and mobile app (Expo/React Native). Robust auth and validation with PostgreSQL, Prisma and Zod. Real-time notifications, live lost-pet mode with geolocation, marketplace and professional dashboards.
88
Performance95
Accessibility96
Best practices100
SEO4Pets Mobile App
iOS and Android app built with Expo and React Native. Access marketplace, veterinary services, real-time lost-pet alerts with live location and push notifications. Integrated with Next web and backend, auth via PostgreSQL/Prisma and validation with Zod.
88
Performance95
Accessibility96
Best practices100
SEOVerónica Moreno's Website
Professional website for Verónica Moreno built with Next.js, TypeScript, React, and Tailwind CSS. Features a multilingual system and fully responsive design, enhancing user experience and SEO performance across all devices.
100
Performance98
Accessibility100
Best practices85
SEOAbanzamed
Custom website for Abanzamed built with Next.js, TypeScript, React, Tailwind CSS, Supabase, and Prisma. Scalable, modern solution optimized for SEO and performance, perfect for healthcare companies seeking a professional digital presence.
96
Performance97
Accessibility97
Best practices100
SEOPandemic
Digital board game Pandemic developed with React.js, Redux, and Tailwind CSS. Delivers an interactive, real-time gaming experience with responsive design, perfect for strategy game enthusiasts online.
98
Performance96
Accessibility96
Best practices100
SEOMetary Platform
Landing page for Metary, a metaverse management platform, developed with Next.js, React, and Tailwind CSS. Integrates a modern content management system for an innovative and SEO-optimized digital presence.
99
Performance92
Accessibility100
Best practices92
SEORay Martín
Personal website developed with Next.js, React, and Tailwind CSS. Features a Firebase content management system, responsive design, and SEO optimization for personal branding.
96
Performance100
Accessibility100
Best practices100
SEOFocus Crea
Corporate website developed with Next.js, React, TypeScript, and Tailwind CSS. Features email capture system and responsive design, optimized for SEO and client conversion.
100
Performance100
Accessibility100
Best practices100
SEOVisa Nómada Digital
Informational website developed in Webflow with custom design and user-focused experience. SEO-optimized to capture leads and improve Google ranking for digital visa services.
95
Performance100
Accessibility96
Best practices92
SEODistribuciones Valeren
Custom ecommerce website built with Webflow, featuring online store integration and tailored design. Optimized for conversions and search engine visibility, ideal for businesses looking to sell online.
74
Performance90
Accessibility81
Best practices100
SEOAsesorae
Webflow site with user integration and custom design. Optimized to attract new clients and enhance the digital presence of professional consultancies.
70
Performance93
Accessibility78
Best practices100
SEOArantxa & Jeannette Wedding
Wedding website developed with Next.js, Tailwind CSS, and TypeScript. Includes invitation and RSVP management, with responsive design and SEO optimization for special events.
100
Performance92
Accessibility100
Best practices100
SEOAsociación Equilibrio
Website for Asociación Equilibrio built with React.js, Tailwind CSS, and Firebase. Features form management and email automation, optimized for SEO and accessibility.
70
Performance83
Accessibility78
Best practices100
SEOAdvance Web
Web tool developed in React, Redux, and Tailwind CSS to analyze and optimize website performance, accessibility, and SEO. Ideal for developers and businesses aiming to improve their online presence.
98
Performance100
Accessibility100
Best practices100
SEOAmentibus Cultui Guild Website
Web platform for the World of Warcraft community, developed with React.js, Tailwind CSS, and Strapi. Integrates CMS, PostgreSQL database, and REST API, optimized for SEO and gaming user experience.
86
Performance99
Accessibility96
Best practices100
SEOInvestment Seeker
Web application built with React, TypeScript, and Tailwind CSS to search, compare, and analyze crypto investment funds. Includes investment calculator and responsive design, SEO-optimized for financial tools.
Tokenomics
Web tool developed in React, TypeScript, and Tailwind CSS to calculate and analyze token and cryptocurrency prices. Includes market cap analysis and SEO-optimized design.
Methodology
01
Discovery
Business, goals and users. Scope and risks.
02
Design
Wireframes and UI; architecture, states and validations.
03
Development
Short iterations, unit tests and reusable components.
04
QA
Functional, accessibility and performance review (CWV).
05
Delivery
Automated deployment and production verification.
06
Maintenance
Continuous improvement, metrics and evolving roadmap.
FAQs
- Do you include anti‑bots and authentication?
- Yes, I integrate anti‑bots, rate‑limits and OAuth (Google, Apple, GitHub) when the project requires it, always prioritizing user experience.
- How long does a typical project take?
- Between 2 and 6 weeks depending on scope, integrations and content.
- What stack do you use?
- React, Next.js 14, TypeScript, Tailwind; Node.js, Prisma, PostgreSQL; Stripe, Sumsub (KYC), Magic Link/Web3 auth plus Vercel and CI/CD.
- Do you offer maintenance?
- Yes, support plans with improvements, monitoring and updates.
Shall we talk about your project?
Focus on performance, accessibility and security to drive business.