What Contalia is and what it's for
Accounting ERP with VeriFactu-compliant invoicing (AEAT).
Accounting and invoicing software designed to comply with the Spanish Tax Agency's VeriFactu regulation.
The problem it solves
The VeriFactu regulation requires SMEs and freelancers to issue invoices with a specific format and traceability. Existing solutions are expensive or overly complex.
How I approached it
Built on .NET 10 and Blazor with a domain layer focused on regulatory compliance: invoice chaining, immutable records and compliant export. Persistence in PostgreSQL.
Highlights
- Compliance-oriented data model (chaining and traceability)
- .NET 10 + Blazor stack for a single web codebase
- Focused on SMEs/freelancers: simple outside, rigorous inside
Tech stack
.NET 10 · Blazor · PostgreSQL
See the full Contalia case study. Want something similar for your business? Let's talk.
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