YeisonLapaix

I build web applications with ASP.NET Core, C# and Angular — and I write about what I learn along the way. Currently Senior Full Stack Developer at VirtualMind, working remote from Santo Domingo.

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01The Writing

Updated weekly · C# · Angular · SQL

Field notes from 11+ years of shipping software.

The archive is built from real project scars: async traps in C#, sibling communication in Angular, EF Core performance tricks, and the patterns that earned their keep. No listicles — just posts I wish I had read before the bug ate my week.

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Angular sibling communication
EF Core performance cheatsheet
Async/await review scars
Elasticsearch caching war story
Automating Redtail CRM with .NET
CSV mapping tool in Angular
SOLID in practice
Eleven years: what I believe

02From the blog

Latest field notes · updated weekly

OOP Interview Questions You Should Master

Yeison Lapaix·May 27, 2026·12 min read

OOP Questions You Should Master for Technical Interviews

Many programmers lose interviews not because they can't code, but because they can't clearly explain concepts they use every day. This guide covers the most common OOP interview questions.

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How to Pass Data Between 2 Child Components in Angular

Yeison Lapaix·Oct 20, 2024·5 min read

How to Pass Data Between Two Child Components in Angular

Learn three techniques for passing data between child components in Angular: @Input/@Output, shared services with BehaviorSubject, and an Event Bus pattern.

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SOlucionar Error: 'Cannot Read Property of Undefined' en Angular

Yeison Lapaix·Oct 1, 2024·4 min read

How to Solve the 'Cannot Read Property of Undefined' Error in Angular

Learn why the TypeError: Cannot Read Property of Undefined occurs in Angular and how to fix it using safe navigation, ngIf, and proper lifecycle management.

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Step by Step: Connect to WordPress Using C#

Yeison Lapaix·Jan 5, 2024·4 min read

Step by Step: Connect to WordPress Using C#

Learn how to connect to a WordPress website using C# and the WordPressPCL library -- covering JWT setup, NuGet installation, and code examples for creating and querying posts.

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03Selected work

Featured projects · shipped & live