iOS/Android app to track subscriptions (individual and group) with price-sharing features and AI-powered alternative suggestions.
ExpoTypeScriptSupabasePostgreSQLPrismaRecharts
Available for work
Sebastián
Diez.
👋
Full Stack Developer
—Pamplona, Spain
Building fast, elegant web products — from idea to production.
01 / About
Developer with a product mindset.
I'm a full stack developer with 5+ years crafting web applications for startups and tech companies. I specialize in React, Node.js, and TypeScript, and I care about clean architecture, performance, and interfaces that feel exactly right.
Experience
5+ years
Projects
20+
Focus
Web & APIs
Clean architecturePerformance-firstClear communicationOn-time delivery
02 / Experience
Where I've worked.
Oct 2025 — Present
TDN Clínica ↗
Software Developer
Desarrollo de proyecto de I+D BioAncient del Gobierno de Navarra. Desarrollo completo de una aplicación de gestión interna para el personal, pacientes, citas, etc.
Oct 2024 — Jun 2025
RecanorSL ↗
Software Developer
Desarrollo de un SAAS y CRM para talleres de automoción. Creación de modulos para Dolibarr, Prestashop y WordPress.
Jan 2024 — Jun 2025
Sumitomo Electric Bordnetze ↗
Software Developer
Mantenimiento de app web de gestión interna de las plantas de Sumitomo. Desarrollo completo de una app para gestion de personal; bajas, vacaciones, turnos, teletrabajo, etc.
03 / Projects
Things I've shipped.
Vehicle marketplace with a seller admin panel, Stripe payment integration, and an automated onboarding system.
Node.jsTypeScriptDrizzleORMPostgreSQLStripe
Onrecambio
Car parts marketplace with real-time stock, order management, chat, license plate lookup, user management, and admin panel.
NextJSTypeScriptSpringBootJavaMySQLTailwindStripeRedisDocker
Social trading app with real-time charts, broker API integrations, and tools to follow and copy successful traders.
Next.jsTypeScriptSpringBootJavaPostgreSQLDocker
03 / Skills
My toolkit.
Languages
TypeScriptJavaScriptPythonSQLJavaC#
Frontend
ReactNext.jsTailwind CSSZustandTanStack QueryRecharts
Backend
SpringBootFastAPIPostgreSQLMySQLRedisDrizzleORM
Infrastructure
DockerVercelGitHub ActionsSupabase
Tools
GitFigmaPostmanClaude CodeSkills
04 / Contact
Let's build something together.
I'm available for freelance projects, consulting, and full-time positions. If you have an idea or a role that fits, I'd love to hear from you.
© 2026 Sebastián Diez
Pamplona, Spain