How to Type Data Added by Express Middleware in TypeScript
Learn how to type data added by Express middleware in TypeScript with declaration merging, runtime checks, and route-specific boundaries.
Accepting new clients
You run the business.
I handle the software.
I'm Samuel Fajreldines, a senior software engineer. Growing U.S. businesses hire my team to become their software department, not a vendor they rehire every quarter. I set the technical direction, my team builds and ships, and I stay accountable for everything that goes out.
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TypeScript
8 articles · practical guides & tutorials by Samuel Fajreldines
In-depth TypeScript articles, hands-on guides and tutorials by Samuel Fajreldines — 8 expert posts on TypeScript for software engineers.
Articles in TypeScript
How to Use TypeScript Project References in a Monorepo
Configure TypeScript Project References to split packages, emit declarations, and verify build order with tsc -b before adding another build tool.
How to host a remote MCP server in TypeScript with HTTP
Host a remote MCP server in TypeScript with Streamable HTTP, host protection, authentication, stateless scaling, independent verification, and limits.
Contract tests for MCP servers in TypeScript
Test a TypeScript MCP server with a stdio client, Vitest, and Inspector. Catch broken schemas, missing tools, and errors before CI.
Mastering TypeScript Decorators: How to Use and How to Create
A comprehensive guide to leveraging TypeScript decorators for building cleaner, more maintainable, and flexible applications.
Understanding TypeScript Utility Types: Partial, Omit, and More
Discover how to leverage TypeScript's utility types like Partial, Omit, Pick and Record to write cleaner, safer and more efficient code.
Using Generic Classes in TypeScript: A Guide for Backend Development
Learn how to leverage generic classes in TypeScript for backend development to create scalable and type-safe applications.
Understanding TypeScript Abstract Classes: A Comprehensive Guide
Learn how to leverage TypeScript abstract classes to create a solid architecture for your applications.