Cesar Aguirre

Software engineer, lifelong learner, language enthusiast & avid reader — Get my free 7-day email course to refactor your coding career: bit.ly/csarag-lessons

Colombia 🇨🇴 (not Columbia) Joined on Jul 23, 2019 https://bit.ly/imcsarag

Work

Content, Courses & Training for .NET teams — Helping teams to write maintainable & performant code

Pinned

Cesar Aguirre

Oct 14

Four Lessons My First Job as a Software Engineer Taught Me About Coding and Life

#career #careerdevelopment #beginners #softwareengineering

4 min read

Cesar Aguirre

Sep 9

It Seems the C# Team Is Finally Considering Supporting Discriminated Unions

#csharp #dotnet #beginners #tutorial

4 min read

Cesar Aguirre

Aug 19

I Applied at a FAANG and Failed — Three Interviewing Lessons

#career #interview #careerdevelopment #beginners

2 min read

Cesar Aguirre

Aug 5

I Don’t Use "Pushy" Questions in Code Reviews Anymore. This Is What I Do Instead

#codereview #career #beginners

3 min read

Cesar Aguirre

Jul 29

My Least Favorite Part of C# Evolution: Inconsistency

#csharp #beginners #dotnet

3 min read

Cesar Aguirre

Dec 16

Don't Ask Anyone To "Be Your Mentor"— Do This Instead

#career #careerdevelopment #beginners #mentorship

2 min read

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Cesar Aguirre

Dec 9

Two Alternatives to Assertion Messages — and Two Ideas if You Do Want To Keep Them

#csharp #dotnet #beginners #testing

2 min read

Cesar Aguirre

Dec 2

Learn To Talk to Non-Tech People in Your Team

#career #careerdevelopment #softwareengineering #beginners

2 min read

Cesar Aguirre

Nov 25

The Power of Function Composition — to Find If an Array Is Special

#techtalks #dotnet #csharp #beginners

3 min read

Cesar Aguirre

Nov 18

Using Lambda Expressions Doesn't Make Your C# Code Functional

#csharp #dotnet #beginners

3 min read

Cesar Aguirre

Nov 11

14 Career Lessons After 10+ Years (and Lots of Trial and Error) as a Software Engineer — Rapid Fire Edition

#career #careerdevelopment #softwareengineering #beginners

3 min read

Cesar Aguirre

Nov 4

Two New LINQ Methods in .NET 9: CountBy and Index

#csharp #beginners #tutorial #dotnet

2 min read

Cesar Aguirre

Oct 28

TIL: How To Use the Specification Pattern in C# To Simplify Repositories

#todayilearned #csharp #aspnet #dotnet

3 min read

Cesar Aguirre

Oct 21

Three Post-Mortem Lessons From a Failed Software Project

#career #coding #management #careerdevelopment

3 min read

Cesar Aguirre

Oct 7

Want to Ace Your Next Take-Home Coding Exercises? Follow These 13 Short Tips

#interview #career #beginners #coding

3 min read

Cesar Aguirre

Sep 30

How to Handle the Startup Class When Migrating ASP.NET Core Projects

#csharp #dotnet #beginners #aspnet

3 min read

Cesar Aguirre

Sep 23

How to Promote Primitive Values To Value Objects

#csharp #beginners #tutorial #ddd

3 min read

Cesar Aguirre

Sep 16

AI Won't Take Our Coding Jobs Yet. But in 2034, Coding by Itself Won't Be Enough

#career #programming #ai #coding

3 min read

Cesar Aguirre

Sep 2

For Cleaner Domains, Move IO to the Edges of Your App

#csharp #dotnet #beginners #eventdriven

4 min read

Cesar Aguirre

Aug 26

A Business Case Against Massive Unrequested Refactorings

#career #refactoring #management

3 min read

Cesar Aguirre

Aug 12

5 Unit Testing Best Practices I Learned from This NDC Conference Talk

#chsarp #dotnet #beginners #testing

5 min read

Cesar Aguirre

Jul 22

New Developers Looking for a Mentor: Here's a (Free) Mentorship Session in 8 Lessons

#career #careerdevelopment #mentorship #beginners

5 min read

Cesar Aguirre

Jul 18

Looking For Feedback on One of Your Posts? Leave a Comment!

#discuss #writing #watercooler #learning

2 min read

Cesar Aguirre

Jul 15

Once You Touch It, You Own It!

#career #softwareengineering #beginners #projectmanagement

1 min read

Cesar Aguirre

Jul 8

Testing DateTime.Now Revisited: Using .NET 8.0 TimeProvider

#csharp #dotnet #beginners #testing

4 min read

Cesar Aguirre

Jul 1

Four Lessons I Wish I Knew Before Becoming a Software Engineer

#career #careerdevelopment #beginners #softwareengineering

3 min read

Cesar Aguirre

Jun 24

The Clean Coder, a Better Book Recommendation

#career #careerdevelopment #books #beginners

1 min read

Cesar Aguirre

Jun 17

Job Security is a Myth: Three Lessons on Layoffs

#career #careerdevelopment #beginners

2 min read

Cesar Aguirre

Jun 12

TIL: How to declutter sites with uBlock Origin filters

#todayilearned #productivity #design #browser

2 min read

Cesar Aguirre

Jun 10

Don’t Be a Hero. It's a Trap

#career #careerdevelopment #beginners

1 min read

Cesar Aguirre

Jun 3

Why Do Some Software Projects Fail?

#career #careerdevelopment #beginners

1 min read

Cesar Aguirre

May 13

This is how I'd start an Ultralearning project to become a Software Engineer

#beginners #programming #tutorial #productivity

3 min read

Cesar Aguirre

Apr 16

How to Test Logging with FakeLogger

#csharp #dotnet #beginners #testing

4 min read

Cesar Aguirre

Mar 18

Let's refactor a test: PaymentProxy

#csharp #tutorial #dotnet #unittest

3 min read

Cesar Aguirre

Mar 11

Let's refactor a test: AccountController

#csharp #tutorial #dotnet #unittest

4 min read

Cesar Aguirre

Aug 14 '23

NullReferenceException & LINQ XOrDefault methods

#beginners #tutorial #cshap #coding

5 min read

Cesar Aguirre

Jul 19 '23

What NullReferenceException is and how to avoid it

#beginners #csharp #coding #tutorial

4 min read

Cesar Aguirre

Jun 5 '23

I'm banning Get, Set, and other method and class names

#csharp #beginners #cleancode #coding

4 min read

Cesar Aguirre

Apr 3 '23

Writing tests for logging messages

#csharp #beginners #dotnet #testing

4 min read

Cesar Aguirre

Mar 6 '23

How to write good unit tests: Use simple test values

#csharp #beginners #dotnet #testing

4 min read

Cesar Aguirre

Dec 19 '22

Four lessons I learned after working with Hangfire

#csharp #dotnet #tutorial #adventofcode

3 min read

Cesar Aguirre

Dec 14 '22

How to replace BackgroundServices with a lite Hangfire

#csharp #dotnet #tutorial #adventofcode

4 min read

Cesar Aguirre

Dec 12 '22

TIL: How to replace keywords in a file name and content with Bash

#todayilearned #bash #tutorial #todayisearched

3 min read

Cesar Aguirre

Dec 7 '22

TIL: Always check for missing configuration values inside constructors

#todayilearned #csharp #dotnet

3 min read

Cesar Aguirre

Dec 1 '22

TIL: How to write tests for HttpClient using Moq

#csharp #beginners #adventofcode #dotnet

4 min read

Cesar Aguirre

Sep 12 '22

Three LINQ Set Methods: Intersect, Union, and Except

#csharp #beginners #tutorial #dotnet

4 min read

Cesar Aguirre

Aug 8 '22

NCache and Full-Text Searching

#tutorial #dotnet #csharp #ncache

7 min read

Cesar Aguirre

Aug 1 '22

Peeking Into LINQ DistinctBy Source Code

#beginners #csharp #tutorial #dotnet

4 min read

Cesar Aguirre

Jul 6 '22

How To Use LINQ GroupBy Method

#csharp #beginners #dotnet #tutorial

4 min read

Cesar Aguirre

Jun 1 '22

Five Common LINQ Methods in Pictures

#beginners #csharp #dotnet

3 min read

Cesar Aguirre

May 4 '22

Three Common LINQ Mistakes and How To Fix Them

#csharp #tutorial #beginners #dotnet

3 min read

Cesar Aguirre

Apr 20 '22

Working with ASP.NET Core IDistributedCache Provider for NCache

#tutorial #dotnet #csharp #ncache

10 min read

Cesar Aguirre

Feb 7 '22

Domain Modeling Made Functional: A jump into the functional world

#beginners #csharp #books #review

2 min read

Cesar Aguirre

Jan 11 '22

The Art of Readable Code: Takeaways

#csharp #beginners #books #review

3 min read

Cesar Aguirre

Dec 6 '21

Unit Testing Best Practices: Organization & Test Data

#csharp #beginners #testing #tutorial

2 min read

Cesar Aguirre

Nov 8 '21

Don't duplicate logic in Asserts: The most common mistake on unit testing

#csharp #beginners #testing #tutorial

3 min read

Cesar Aguirre

Oct 11 '21

Five cool C# features: Before and After

#beginners #csharp #tutorial

4 min read

Cesar Aguirre

Oct 4 '21

Unit Testing Best Practices: 6 tips for better names

#beginners #csharp #testing #codequality

2 min read

Cesar Aguirre

Sep 27 '21

Simplify your unit tests with auto-mocking and TypeBuilder

#showdev #csharp #beginners #testing

5 min read

Cesar Aguirre

Aug 30 '21

How to create custom assertions in C# with MSTest

#beginners #csharp #testing #tutorial

2 min read

Cesar Aguirre

Aug 2 '21

How to write better assertions: 5 Best Practices

#csharp #testing #beginners #tutorial

4 min read

Cesar Aguirre

Jul 5 '21

How to create test data with Object Mothers

#beginners #csharp #testing

3 min read

Cesar Aguirre

Jun 7 '21

What are fakes, stubs and mocks?

#beginners #csharp #testing

3 min read

Cesar Aguirre

May 3 '21

4 naming conventions to better name your tests

#tutorial #csharp #testing #beginners

2 min read

Cesar Aguirre

Apr 5 '21

4 common mistakes when writing your first unit tests

#csharp #tutorial #beginners #testing

4 min read