Freelancer profile translated to English.
Back to original languageAbout Aitor
I'm Aitor, a full-stack developer based in Gijón, Asturias, specializing in Next.js, TypeScript, and Supabase. I focus on building modern, scalable web products oriented towards real results.
What sets me apart from other developers is that I don't just write code; I co-founded and single-handedly developed Atresir, a B2B SaaS booking management platform for the hospitality sector, currently in production with paying clients in Spain, Iceland, and Austria. This means I understand the complete product lifecycle: architecture, development, deployment, maintenance, and continuous evolution.
How I can help you:
- Developing web applications with Next.js and TypeScript.
- Integrating databases with Supabase and PostgreSQL.
- Designing modern interfaces with Tailwind CSS.
- High-performance landing pages and corporate websites with Astro.
- API integrations and automations.
- Deployment on Vercel and performance optimization.
Real projects delivered:
I have developed websites for local businesses like Bar Pasodoble and Rinconcito Mexicano, and I currently maintain Atresir as an active SaaS product with features such as dynamic booking management, capacity overlap logic, and a multi-client administration panel.
My working style:
I work with an agile workflow based on incremental deliveries, clear communication, and documentation. I use modern AI-assisted development tools that allow me to deliver quickly without sacrificing quality.
I am available for one-off projects, ongoing collaborations, or technical consulting. If you have a project in mind, tell me what you need.
English
Native or bilingual
Spanish
Native or bilingual
Remote only
Primarily works remotely
Experience
- Atresir S.L.Full-Stack DeveloperTELECOMMUNICATIONSDecember 2025 - Today (6 months)Gijón, SpainAtresir - Booking SaaS System for RestaurantsMulti-tenant booking management platform designed for restaurants of all sizes. It allows customers to book online 24/7 and restaurants to manage tables, schedules, and statuses in real-time from a comprehensive administration panel.My role:Full-stack development, architecture, database design, and deployment. Own project in the commercialization phase with real clients in production.Technology Stack:Next.js 16 (App Router, Turbopack), React 19, TypeScript, Tailwind CSS, Supabase (PostgreSQL + Row Level Security + RPC), Resend (transactional emails with React Email), Telegram Bot API, next-intl, @dnd-kit, Zod, Vercel.Main Features:
- Public booking form with selection of date, time, number of guests, and preferred area. Best-fit table auto-assignment algorithm combining up to 4 tables. System with 5 booking statuses (confirmed, arrived, completed, no-show, cancelled) with controlled transitions and automatic table unassignment/reassignment.
- Administration panel with unified day/week view, interactive visual timeline of tables with drag & drop for reassignment, global search by name, phone, or email with pagination, and automatic polling every 30 seconds with visual notification of new bookings.
- Seasonal schedule management with multiple schedules, per-shift zones, special days, and temporary closures. Customer editing and cancellation of bookings via email with secure tokens. Automatic confirmation, reminder, and cancellation emails with JSON-LD, ICS file, and Google Calendar button.
- Full internationalization in 4 languages (Spanish, English, Icelandic, German) with 866+ keys, automatic browser language detection, and manual selector. Real-time notifications via Telegram with webhook for bot self-configuration.
- SICO S.L.Junior Full-Stack Developer InternSeptember 2025 - November 2025 (2 months)Gijon, AS, Spain• • Developed and maintained web applications with C#/.NET and Angular, applying SOLID principles and layered architecture in a real production environment.• • Implemented version control workflows with Git and contributed to CI/CD pipelines, improving deployment consistency and reducing manual errors.• • Contributed to the development of a hospital linen traceability system, integrating business logic with REST APIs.
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Education
- Higher National Certificate in Web Application DevelopmentTunivers Formación S.L.2025CFGS Desarrollo de Aplicaciones Web
- Backend Development and APIsFreeCodeCamp2025Backend Development and APIs