Freelancer profile translated to English.
Back to original languageAbout Daniel
I am a Full-Stack Developer specializing in SaaS applications with over 15 years of experience developing software for businesses and digital products.
I help startups, SMEs, and entrepreneurs transform ideas into functional, scalable, and production-ready web applications.
My experience covers the entire development cycle: requirements analysis, functional design, architecture, database modeling, frontend and backend development, deployment, and maintenance.
I have participated in the development of business management SaaS platforms, reservation systems, data analysis tools, and integrations with artificial intelligence. I am currently developing Pymwin, a business management platform created entirely by me.
I primarily work with Next.js, React, TypeScript, PostgreSQL, and Supabase.
I can help you with:
• Development of MVPs and SaaS products.
• Custom web applications.
• Architecture and database design.
• API and artificial intelligence integration.
• Evolution and maintenance of existing applications.
• Business process automation.
I am looking for projects where I can contribute technical expertise, product vision, and the ability to build complete end-to-end solutions.
Spanish
Native or bilingual
Catalan
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Pymwin.comFounder & Full-Stack DeveloperMarch 2026 - Today (4 months)Development of Pymwin, a SaaS platform for small business management.Project designed and implemented entirely by me, from functional definition and data model to application development, deployment, and maintenance.• • Full-stack design and development using Next.js, React, TypeScript, and PostgreSQL.• • Database architecture and business logic.• • Management of clients, reservations, scheduling, services, products, and billing.• • Implementation of dashboards and business indicators.• • User experience design and continuous product evolution.• • Deployment and operation in production environments. Technologies: Next.js◦ · React◦ · TypeScript◦ · PostgreSQL◦ · Supabase◦ · Vercel
- CODXFull-Stack DeveloperFebruary 2026 - Today (5 months)Barcelona, Spain• • Design and development of the web application using Next.js, React, and PostgreSQL.• • Exploration of integrations with open banking and financial data analysis.• • Development of functionalities for account aggregation, financial tracking, and economic planning.• • Full-stack architecture and data model design.• • Use of generative AI tools to accelerate development and feature prototyping.
- Leonard AI.comFull-Stack Engineer — SaaS - Leonard AISeptember 2023 - December 2025 (2 years and 3 months)Barcelona, Spain• • Full-stack design and development of the web application using Next.js, React, TypeScript, and Node.js.• • Architecture and management of PostgreSQL database (Supabase) in a multi-tenant environment.• • Integration of conversational AI and intelligent assistants for business support, marketing, and center management.• • Implementation of key modules: online reservations, service management, clients, schedules, revenue, and analytics.• • Deployment and production maintenance on Vercel, optimizing performance and reliability.• • Development of APIs and business logic for internal process automation.
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Education
- CFGS Development of Computer ApplicationsIES Escola del Treball2007CFGS Desarrollo de Aplicacion, Informática
- Computer Systems Administration, InformaticsStucom CFGS2006Administración de Sistemas Informáticos, Informática