Full-Stack Platform
Gaudia
Queue Management System
TypeScriptReactNode.jsGraphQL+3
View details Hey, I'm Pietro Maltese.Friends Everyone calls me Piero.I'm a Software Engineer.
Selected Work
A collection of projects I've built.
AI / SaaS
Ocarina
AI Document Processing
HonoReactPostgreSQLOpenAI+3
View details PWA / Enterprise
Cadidro
Field Management System
ReactHonotRPCPostgreSQL+3
View details About
London-based full-stack engineer who loves shipping products end-to-end.
Along the way, I've been lucky to work with excellent professionals who fueled the passion I've always had for computing and programming.
I've hopped between backend and frontend, built mobile experiences, explored UI/UX and embedded systems, and spent time with realtime systems, SQL/NoSQL data stores, microservices, event-driven architectures, serverless, and observability.
Get in touch
PWA / Enterprise
Cadidro
Field Management System
A mobile-first Progressive Web App designed for field technicians performing hydraulic maintenance work. The app operates fully offline, allowing operators to record interventions, capture photos, and log GPS coordinates even in areas with no connectivity.
ReactHonotRPCPostgreSQLDrizzlePWATailwind
Screenshots
Key Features
- Offline-first architecture with bidirectional sync
- Geolocation capture for each intervention
- Photo attachments with categorization
- Role-based dashboards (Admin, Operator, Client)
- Multi-format exports (PDF, CSV, Excel, KMZ)
- Calendar view of interventions
- Conflict resolution for sync operations
- Installable PWA with service workers
Technical Implementation
Frontend
React 19 with TanStack Router and Zustand state management
Offline Storage
Dexie (IndexedDB) with custom sync manager
Backend
Hono framework with tRPC 11 for type-safe APIs
Database
PostgreSQL with Drizzle ORM and soft-delete support
Storage
AWS S3 for photo storage with Sharp image optimization
Deployment
Serverless on Vercel with edge functions
Challenges
Implementing reliable offline-first sync with conflict resolution was complex. I built a checkpoint-based incremental sync system with soft-delete support that handles network interruptions gracefully.
Outcome
The app allows field operators to complete their work regardless of connectivity, with automatic background sync when back online. Reports that previously required manual compilation can be generated and exported on demand.