08/15/2026 updated
100 % available
Full-Stack Product Developer | Web Apps, APIs, Automation & AI
Tarragona, Spain
Worldwide
Desarrollo de Aplicaciones con Java (IFCT034PO) - Campus ImpúlsateAbout me
Full-stack product developer based in Madrid. I turn ideas and blocked digital products into reliable web apps, integrations and automated workflows - built to be shipped, tested and handed over clearly.
SupabaseApplication Programming Interfaces (APIs)Software as a ServicePostgreSQLNode.jsShopifyTypeScriptWeb Application DevelopmentWorkflowsReact.jsFull Stack Development
I build and recover web products where the result has to work across UI, API, data, integrations and deployment.
Core work
• React, Next.js, Node.js, TypeScript and Python
• Web applications, SaaS dashboards, authentication and multi-tenant flows
• Supabase, PostgreSQL, APIs, webhooks and third-party integrations
• Make.com automation and AI/LLM product features
• Shopify and WordPress storefronts, landing pages and conversion-critical journeys
• Production bug investigation, root-cause fixes and acceptance tests
Selected evidence
• Built Sofia, a multi-tenant product spanning React, Node.js, Supabase, authentication, dashboards, external APIs and AI workflows.
• Validated an Airtable-to-Supabase migration with 210 automated tests.
• Restored an API, Railway and Telegram delivery path end to end.
• Delivered six paid improvements on a live web product after an initial production issue.
I work in defined milestones: agree the acceptance result, build the smallest reliable path, test it in the target environment, and document the handover. Available remotely from Madrid. Languages: Spanish, English, French and Catalan.
Experience
Professional experience0 - 5 years
Freelancer since2026
Languages
GermanBasic knowledgeEnglishFluentFrenchFluentSpanishNative speaker
Project history
Paid production recovery for a live commerce site: repaired Tawk.to chat, restored Buy/Sell/Accounts form-to-chat delivery, fixed admin USD/EUR price drift, and verified the result in preview and live.
Built a multi-tenant product spanning React, Node.js, Supabase, authentication, dashboards, external APIs and AI workflows. Defined milestones, delivered working product increments, and validated key flows.
Built operational automations around Google Sheets using Make and n8n: connected data flows, automated repetitive steps, and maintained workflows for practical day-to-day use.