TopFintech
+2
Aurantis
Physical asset tokenization platform in Next.js. Stripe payments, Sumsub KYC, Docuseal contracts, and Supabase CMS.
93
93/100Lighthouse
Ray MartínFullstack Product Developer
I build SaaS platforms, mobile apps, and web products that scale — from idea to production, with a focus on performance, accessibility, and security.
0+
years of experience
0+
projects delivered
Performance (Core Web Vitals)Accessibility (WCAG 2.2)Security & authentication
Next.jsTypeScriptReactNode.jsTailwind CSSReact NativePostgreSQLPrismaStripeSupabaseNext.jsTypeScriptReactNode.jsTailwind CSSReact NativePostgreSQLPrismaStripeSupabase
SupabaseStripePrismaPostgreSQLReact NativeTailwind CSSNode.jsReactTypeScriptNext.jsSupabaseStripePrismaPostgreSQLReact NativeTailwind CSSNode.jsReactTypeScriptNext.js
Trusted by teams building real products
- Animal Platform
- Blockchain
- Fintech
- Healthcare
- Services
- Baby Tech
01 / Projects
Featured projects
Selected recent work
TopSaaS
+3
Naranest - Baby Tracking App
Complete app to track feeding, sleep, diapers, growth, activity, and medical events. Includes Google authentication, multi-user collaboration, dashboard metrics, real-time notifications, and Stripe subscription management. Available as an iOS and Android app with Capacitor.
99
99/100Lighthouse
TopBlockchain
Blockchain investment platform
Investment platform to fund tokenized blockchain projects, with identity verification (KYC/KYB), wallet integration, and an admin panel with CRM.
93
93/100Lighthouse
TopPlatform
Animal health management platform
Animal health management platform with web and mobile app: robust authentication, marketplace, real-time notifications, and geolocation.
95
95/100Lighthouse
TopHealthcare
Healthcare corporate site
Corporate healthcare website, scalable and optimized for SEO and performance.
98
98/100Lighthouse
Community SaaS
+3
Crewstr
The social platform for GTA V roleplayers. Manage characters, vehicles, garages, and crews in one place, with a community feed, Leaflet map, global search, public roadmap, freemium model, and admin impersonation. Built with Next.js 16, Prisma, and PostgreSQL. Available as an iOS and Android app with Capacitor.
90
90/100Lighthouse
Own products
Game
+2
Onzio — Football Manager
The classic football manager reimagined as a card club: open packs, collect players and build your eleven. Next.js 16, React 19, PostgreSQL and Prisma, with server-authoritative gameplay.
99
99/100Lighthouse
Product
+1
WebToApp Kit — Native app to the stores
Open Expo template (free + Pro) your AI agent operates to wrap your web or no-code app and ship it to the App Store and Google Play. Done-for-you service available.
94
94/100Lighthouse
TopSaaS
+2
Rivelko AI
SaaS that turns static forms into conversations: AI generates the form (conversational or classic) from a description or a URL, and it embeds into any site with a single script tag (13KB gzipped widget with Shadow DOM). Hexagonal architecture on Next.js 16 with AI SDK, Prisma, Stripe, and NextAuth. Includes a CRM with Kanban pipelines and deals, tickets, webhooks, and AI-agent access over MCP.
100
100/100Lighthouse
02 / Testimonials
What Clients Say
Feedback from teams I've partnered with to build and ship products.
Ray delivered a complete fintech platform with KYC, Stripe payments, and an admin panel in record time. His attention to detail in security and performance is exceptional.
Working with Ray was an excellent experience. He transformed our idea into a mobile and web app with impeccable UX and impressive load times.
The code quality and architecture Ray implemented for Naranest allowed us to scale seamlessly. Perfect Lighthouse scores from day one.
03 / Services
Services
I build reliable, fast, and accessible experiences with a business-first mindset.
Product UI & Frontend
Fast, consistent interfaces focused on conversion and usability.
UI/UX and design systems
Core Web Vitals optimization
WCAG 2.2 accessibility
3 servicios
Backend & Integrations
Robust APIs, event-driven workers, and scale-ready data flows.
REST/GraphQL API integration
Data modeling and performance
Prisma, Supabase and PostgreSQL
Stripe payments, billing and webhooks
Sumsub KYC/KYB and compliance
Web3 onboarding with Magic Link and wallets
6 servicios
Security & Auth
Secure authentication, fraud prevention, and endpoint protection.
Anti‑bots and invisible validations
Rate limiting and endpoint protection
OAuth with Google, Apple, GitHub
Secure sessions and best practices
4 servicios
DevOps & Delivery
Observable releases with predictable performance.
CI/CD with Vercel and GitHub Actions
Edge and smart caching
Monitoring, alerts, and metrics
3 servicios
04 / Skills
Skills
Technical stack, tools, and methodologies built for high-impact products.
Product UI & frontend systems
Next
React
React Native
iOS
Android
HTML
CSS
JavaScript
TypeScript
TailwindCSS
Responsive Design
05 / Methodology
Methodology
Iterative process to deliver value with clarity, quality, and speed.
Step 01
Discovery
Business, goals, users, and success metrics.
Step 02
Design
Wireframes, UI, and architecture with states and validations.
Step 03
Development
Short iterations, testing, and reusable components.
Step 04
QA
Functional, accessibility, and performance review (CWV).
Step 05
Delivery
Automated deployment, verification, and handoff.
Step 06
Maintenance
Continuous improvement, analytics, and evolving roadmap.
06 / About
About me
StackNext.js · React · Node.js · TypeScript
FocusSaaS · Fintech · Mobile
BasedSpain · Remote EU/LatAm
Fullstack product developer with 7+ years leading the full cycle —discovery, UX, development, and deployment— across 19+ products, with AI-assisted development.
I integrate Stripe payments, Sumsub KYC/AML, and modern auth to ship fast, accessible, and secure platforms.
07 / Experience
Professional experience
Experience across startups, consulting, and product teams with measurable impact.
2025 - Current
Fullstack Product Developer
Fenix MocaRemote
2025 - Current
Fullstack Product Developer
FreelanceRemote · EU & LatAm
01/2021 - 12/2024
Freelance Developer
FreelanceLas Palmas de Gran Canaria, Spain
11/2021 - 12/2022
Frontend Developer
Metary PlatformLas Palmas de Gran Canaria, Spain
06/2020 - 05/2021
Data Analyst
ButlerScientific, S.L.Barcelona, Spain
05/2019 - 06/2020
Frontend Developer
Raúl LópezLas Palmas de Gran Canaria, Spain
08 / Blog
Blog
Tutorials, guides, and best practices for developers.
09 / FAQs
FAQs
Clear answers about scope, timelines, and stack.
Let’s grow your product
Performance, accessibility, and security that build trust and growth.