Builder Showcase
Projects
Things I've built — from smart locker infrastructure to AI-powered platforms.
Wildflower Smart Locker
ActiveCreator
Autonomous, solar-powered, portable smart locker
The world's smartest smart locker: autonomous, solar-powered, and portable. Can be placed inside or outside any shop, bar, or restaurant. Has its own internet connection and can be opened or closed remotely from anywhere in the world. Everything developed internally — from PCB board design to firmware to the web platform.
Arca Delivery
Creator
Customer-facing parcel delivery platform with Stripe and TIPSA
Customer-facing web platform for Barcelona parcel delivery. Customers get shipping quotes, pay via Stripe Checkout, and place delivery orders fulfilled through TIPSA. Admin back-office for managing orders, rate cards with territory-based pricing, and TIPSA courier integration. Magic link authentication.
DeliveryMap
Creator
Delivery operations admin with barcode scanning and route mapping
Phoenix/Ash delivery management system. Imports bulk package data from Excel (supporting Olimpost, DHL formats), resolves addresses via Google Places API, and displays packages grouped by address on Google Maps. Tracks delivery status, barcode scanning (via Rust NIF), and billing/revenue. Serves a JWT-authenticated REST API for the Ninja PWA driver app.
Ninja PWA
Creator
Offline-capable mobile app for delivery drivers
Mobile-first Progressive Web App for delivery drivers in the field. Connects to the DeliveryMap backend API for authentication, package data, and delivery lists. Features offline support via service workers and IndexedDB, Google Maps navigation, and real-time package status updates.
Arca Lens
Creator
AI-powered shipping label recognition
Shipping label recognition application using OpenAI GPT-4o vision API to extract structured data from label photos — recipient info, sender info, addresses, and tracking numbers. Integrates with Google Drive for automatic label processing and Google Places API for address validation. State machine workflow: upload → extraction → validation → finalization.
Arca Grants
Creator
NEOTEC grant application management tool
Internal collaboration tool for preparing a NEOTEC 2026 grant application. Embeds and renders Markdown documents at compile time — requirements, scoring criteria, business plan sections, and 9 evaluated idea briefs. Role-based access with super admin gating. Built to organise and refine the grant narrative around the lead idea: PULSE/DeliveryOS, an open logistics operating system.
Arca.bot Cloud Platform
Creator
Real-time smart locker management and device communication
Phoenix/Ash cloud backend at arca.bot for managing smart lockers. Admin dashboard for lockers, pods, hosts, digital keys, health reports, and alarms. Real-time device communication via Phoenix Channels — lockers connect over WebSockets to receive commands (unlock, lock, activate) and publish telemetry. Includes theft alarm notifications via Slack, remote WiFi configuration, and QR-code-based digital key management.
Arca Locker Firmware
Creator
Nerves firmware for Raspberry Pi smart locker hardware
Embedded Elixir firmware running on Raspberry Pi 3 inside the smart lockers. Controls door locks, LED lights, NFC/barcode readers, buttons, and accelerometers via GPIO/I2C/UART. Implements a locker state machine, motion-based theft detection, and cellular failover. OTA firmware updates via NervesHub. Offline-capable logging with automatic sync on reconnect.
Last-Mile Delivery Platform
Creator
Logistics operation scaling to 1,000 parcels/day
Built a logistics company delivering parcels for Amazon in Barcelona. Scaled from 30 parcels/day to 1,000 parcels/day, becoming one of Barcelona's largest last-mile delivery operations. Now transitioned to a TIPSA agent.
Things I build for fun, for my family, and for learning.
Inkwell
Live markdown preview daemon with desktop app
A markdown preview tool that runs a lightweight background daemon, watching files and pushing real-time rendered HTML updates to a browser or native Tauri desktop app over WebSocket. Supports GitHub Flavoured Markdown with syntax highlighting, Mermaid diagrams, and dark/light themes. Installable via Homebrew. Auto-starts on first use, auto-shuts down after inactivity.
zimakki.com
Personal portfolio with AI-powered chat
Personal brand website and portfolio built with Phoenix, Ash Framework, and LiveView. Features a database-driven career timeline, project showcase, blog, and an AI-powered chatbot whose system prompt is dynamically generated from the timeline database — so the AI always reflects the latest career data.
MiaMaths
Multiplayer maths racing game for kids
Real-time multiplayer maths game built for my daughter when she was learning her times tables. Players compete in races answering multiplication, division, and long multiplication problems — first to 10 correct answers wins. Free, browser-based, no install needed.
Viola Dooble
Real-time multiplayer card-matching game
Fast-paced multiplayer card-matching game inspired by Dobble/Spot It!, supporting up to 8 players. Mobile-first design with real-time gameplay via LiveView.
7A Reading Counter
Reading tracker to encourage kids to read more
An application for kids to track the books they read and the number of words, encouraging them to read more. Built for my daughters.
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