• Sole engineer behind lupa.art, the all-in-one AI creative platform.
• Handling everything from product and frontend to infrastructure and scaling it to a large user base.

• Built an AI-based Tax Residency Certificate validation system with the AI SDK, turning a 2-minute manual review into near-instant processing across 100+ monthly uploads.
• Automated Amazon Business invoice ingestion via the Payhawk API, saving the finance team ~8 hours/month on 200+ invoices.
• Shipped a WhatsApp tenant communication system on the Wati API for payments, check-ins, check-outs and contract terminations.
• Created a real-time cleaning scheduling system integrated with the Connecteam API to coordinate property managers and cleaning staff.
• Drove agile improvements (retros, tech talks, workflow tweaks) and onboarded & mentored two full-stack developers.

• Led the creation of the frontend for internationalizing the Battery-as-a-Service.
• Maintained a series of back-office apps made with React, Redux and implemented new features for internal users to manage our BaaS, fleet & general management. Progressively migrated the back-office apps to a Vue.js frontend using hexagonal architecture.
• Improved the build time of our React apps by 90%.

• Kickstarted & led the development of a CRM that cross-matches the offer; all the properties from the main real estate agencies, with the demand; our database of customers integrated with the Hubspot and Witei API’s. Developed a complete calendar system that syncs with Google Calendar using domain-wide delegation.
• Implemented a solid testing infrastructure to the marketplace, containing unit tests, integration tests & end-to-end tests using Jest, React Testing Library & Cypress.
• Developed a compact Next.js app within a tight time-frame, with no design as reference, to show it to investors to demonstrate what we’re capable to achieve with our systems.
• Successfully transitioned marketplace frontend from Styled Components to TailwindCSS, enhanced the site's accessibility, resulting in an improved PageSpeed score.
• Created a Python script to extract the facade length & street width of all the streets of Spain. This was a big achievement because no company or public dataset has this data.
• Developed a Python script to generate a csv of all the cadastre of Barcelona & Madrid with phone numbers, names, and business info for the CEO of the company to generate more revenue thanks to buildings without horizontal division.
• Delivered two landing pages each sprint following the design guidelines & using Atomic Design and making it pixel-perfect.
• Developed an MVP with Next.js & TailwindCSS where it shows an accurate & complete report page about profitability, assumptions about uses/activities, legal terms, financials, historical of the property, etc. for any address or cadastral reference of Spain. Key achievement that was also shown to investors.

Twitch chat client for desktop used by multiple famous streamers. I developed the website and the backend for the subscription system and the badge feature. Reached +230k page views & +50k downloads in the first 2 years

Lead developer at Havanic, creating multiple .io games that reached millions of players such as Balz.io or Popsplit.us. Integrated payments with Stripe, real-time communication with uWebSockets & implemented the main engine graphics with PIXI.js