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Felipe TrejosSoftware Engineer_

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Stampr

Stampr

Digital loyalty for small businesses: stamp cards that live in Apple and Google Wallet, no app and no hardware, ready in minutes. Signed wallet passes with push updates, a merchant dashboard for customers, devices, notifications and billing, a barista PWA for stamping at the counter, and a Square integration so card payments add stamps on their own. Stripe billing and an internal ops console. Three Next.js apps on a shared package, in English, Spanish and Catalan.

Leafy Wallet

Leafy Wallet

An offline-first wallet built on MongoDB. Balances, activity and an AI assistant (a local Ollama model routed through LangGraph) run entirely on-device and sync to Atlas the moment the connection returns. Offline sends queue and replay against a real payment platform, and semantic search over transactions works with or without a network.

Damm × Engineering Hub '26

Damm × Engineering Hub '26

Winner of the Damm × Engineering Hub '26 hackathon. Commercial forecasting tool that turns UK sales history, targets, and the promo plan into SKU forecasts, ranks commercial gaps, explains drivers, and recommends actions via an LLM scenario engine.

autOScan

autOScan

A grading platform for C lab submissions. It compiles and runs every submission against the lab's tests, flags banned functions, copied code and AI-generated work, and drafts feedback that professors and TAs can edit and send. Policies per lab, classes and assignments in one shared workspace, so a whole course gets graded with the evidence in front of you.

InterhackBCN '26

InterhackBCN '26

Winner of InterhackBCN 2026. Damm's delivery-route planner that turns a fleet, a list of clients, and their delivery windows into optimized truck routes with pallet layouts and full-day timelines.