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
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
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
TopRegTech
+1
Aurantis
On-chain compliance platform for digital assets and tokenized real world assets: anti money laundering, market surveillance and post-trade in one product. I am an investing partner and product manager, and I built the website.
97
97/100Lighthouse
TopApp
+3
Naranest: your baby's day, together
App for tracking a baby's feeds, sleep, nappies and growth across several carers, with WHO percentiles and a PDF report for the paediatrician. Verónica and I build it; the iPhone app is coming soon.
99
99/100Lighthouse
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
Game
Tarnix: loot ARPG for iPhone
Loot-driven action game for iPhone built with Godot. One-thumb play in portrait, ten worlds, local co-op over wifi and no data collected.
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.
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.
09/2026 - Current
Investing Partner and Product Manager
AurantisRemote
01/2025 - Current
Senior Fullstack Developer
FenixmocaRemote · Madrid, Spain
10/2024 - Current
Senior Frontend Developer
Freelance · Pet healthRemote · Madrid, Spain
01/2024 - Current
Fullstack Developer
Freelance · HealthcareRemote · Madrid, Spain
05/2024 - 02/2025
Lead Frontend Developer
Freelance · SaaS productRemote · Madrid, Spain
11/2022 - 01/2024
PERN Stack Developer
MetaryRemote · Madrid, Spain
01/2023 - 03/2024
Web Developer
Freelance · Corporate sites and e-commerceRemote · Canary Islands, Spain
09/2020 - 05/2022
Data Scientist Assistant
Butler ScientificsBarcelona, 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.