Showcase

Building blocks, libraries, and products where engineering decisions become visible.

This is work that shows how Posseth Software thinks about API design, security defaults, performance, and maintainable implementation.

Project

SafeWebCore

Security headers middleware for ASP.NET Core with strict A+ baseline and nonce-driven CSP.

Many .NET teams struggle with fragmented header configuration. CSP, HSTS, COOP/COEP, Permissions Policy and Referrer-Policy are set differently per project, often incomplete or overly permissive. Result: weak A+ scores, XSS risks, and maintenance pain as browsers tighten rules. Without nonce support for inline scripts/styles in Razor Pages, true CSP requires unsafe-inline.

.NET 10 ASP.NET Core Razor Pages Security Headers CSP A+ C# 14 Vanilla JS
View project

Project

SharpCoreDB

High-performance embedded database for .NET 10 with SQL, encryption, and file-based storage.

Full database servers (SQL Server, PostgreSQL) are too heavy for many scenarios: edge devices, offline apps, config stores, audit logs, embedded tooling. At the same time, plain JSON/CSV files are insufficient for queries, transactions, concurrency and reliable storage. Teams keep rebuilding the same wheel: file locking, parsing, indexing.

.NET 10 C# 14 SQL Embedded Database Span<T> ArrayPool<T> Channel<T> AES Encryption
View project