Go on My name is Elton Minetto

Avoiding supply chain attacks in Go

Sun, 05 Apr 2026 19:00:43 -0300

If you’ve been following the news in recent weeks (March/April 2026), you must have read about two major “supply chain attacks” that occurred. You were probably affected in some way by the problem with the LiteLLM and Axios projects.

Go should be more opinionated

Thu, 19 Jun 2025 10:00:00 -0300

One of the perks of being a Google Developer Expert is the incredible opportunities it provides. A few weeks ago, I had the opportunity to meet Robert Griesemer, co-creator of Go, in person, as well as Marc Dougherty, Developer Advocate for the Go team at Google. At a happy hour after Google I/O, Marc asked me and another Go GDE from Korea for feedback on the language. My response was that I didn’t have any specific feedback about the language but that:

Creating an MCP Server Using Go

Thu, 01 May 2025 11:00:00 -0300

In November 2024, Anthropic published a blog post announcing what may be its most significant contribution to the AI ecosystem so far: the Model Context Protocol.

First impressions with the Turso database

Sun, 23 Mar 2025 18:00:00 -0300

Turso is one of those projects that you look at and think, “How has no one done something like this before?” I’ve been following the project since its launch, but only now have I been able to dedicate some time to testing, which I describe in this post.

Creating an API with authentication using Encore.go

Sat, 22 Feb 2025 07:10:00 -0300

This text is the second part of a series of posts about the Encore.go framework :

Creating an API with a database
Creating an API with authentication (<— you are here)
Communication via Pub/Sub
Deploy

In the first part, we created a simple API that validates a user given the correct parameters. Now, let’s use this functionality to increase the project’s complexity: add a new API that requires authentication to be accessed.

Getting Started with Encore.go

Sat, 25 Jan 2025 07:10:00 -0300

Encore.go has been on my radar for quite some time, when its beautiful website and examples caught my attention in a news article on Hacker News. But my excitement really increased after this post was published in December 2024. It announced that the framework would become an independent project, separated from the Encore Cloud tool. This decision can make the framework more attractive to companies and developers who want to use it in their existing environments. I have nothing against Encore Cloud, which seems to be a very interesting and robust solution, but this freedom of choice favors adoption in companies of different sizes.

Using CloudEvents in Go

Thu, 28 Nov 2024 07:00:43 -0300

Adopting an event-driven architecture (EDA) to increase scalability and reduce coupling between components/services is relatively common in complex environments.

Resilience in communication between microservices using the failsafe-go lib

Sat, 24 Aug 2024 09:00:43 -0300

Let’s start at the beginning. What is resilience? I like the definition in this post:

The intrinsic ability of a system to adjust its functioning prior to, during, or following changes and disturbances, so that it can sustain required operations under both expected and unexpected conditions

JSON vs FlatBuffers vs Protocol Buffers

Mon, 05 Aug 2024 21:00:43 -0300

When we think about communication between services/microservices, the first option that comes to mind is good old JSON. And this is not without reason, as the format has advantages, such as:

Using test helpers in Go

Thu, 15 Feb 2024 20:00:43 -0300

Recently, in a code review, the great Cassio Botaro gave me a handy tip: refactor some tests to use the test helpers feature from the testing package.

Running WebAssembly code in Go

Mon, 11 Dec 2023 08:00:43 -0300

This post is the second part of a series about WebAssembly and Go. In the first post, we saw how to run Go code in a web browser. In this one, we will import a WebAssembly function and run it in a Go application.

WebAssembly: using Go code in the browser

Fri, 17 Nov 2023 08:00:43 -0300

Occasionally, a technology emerges that significantly impacts developers’ daily lives—things like Linux, Git, Docker, and Kubernetes, among others. WebAssembly is a technology that has the potential to appear on this select list.

New in Go 1.21: Toolchains

Wed, 18 Oct 2023 21:00:43 -0300

The version 1.21 of the language implemented an essential new feature. According to the documentation:

Writing tests for a Kubernetes Operator

Thu, 05 Oct 2023 07:30:43 -0300

In the last post, we saw how to create a Kubernetes operator using operator-sdk. As that text was quite long, I decided to write this second post to focus on the application’s testing part.

Creating Kubernetes Operators with operator-sdk

Fri, 08 Sep 2023 08:30:43 -0300

If you develop APIs or microservices, especially in medium to large environments, you probably use Kubernetes.

GDE in Go

Wed, 23 Aug 2023 08:30:43 -0300

I came across an exciting project called Google Developer Experts. According to the official website, this is a group of “experienced Google technology experts, influencers, and thought leaders.”

[Go] How to work with dates in tests

Fri, 30 Jun 2023 08:30:43 -0300

Working with dates in any programming language presents some challenges. In this post, I will show how to work with dates when writing unit tests for a Go application.

Choosing dependencies using deps.dev

Wed, 19 Apr 2023 08:30:43 -0300

Choosing a project’s dependencies is something we sometimes overlook, but it can have a very relevant impact. The following image illustrates the idea:

Go Cloud Development Kit

Tue, 10 Jan 2023 09:00:19 -0300

In this post, I will talk about an exciting project maintained by the team that develops the Go language: the Go Cloud Development Kit, also known as the Go CDK.

Introduction to Cuelang

Tue, 08 Nov 2022 13:00:19 -0300

I bet that at that moment, you are thinking:

“Another programming language”?

Calm down, calm down, come with me, and it will make sense :)

Creating an API using Go and sqlc

Sat, 22 Oct 2022 13:00:19 -0300

When writing a Go application that handles data in a database (in this post, I will focus on relational databases), we have a few options:

Accelerate your local development environment with Tilt

Wed, 31 Aug 2022 13:00:19 -0300

We spend hours and hours developing applications on our machines, with more and more requirements and complexity. In addition, any modern application has multiple containers, microservices, deployments in different environments, various stacks, etc. So any tool that can make our flow more agile is handy.

Error handling of CLI applications in Golang

Wed, 06 Jul 2022 17:56:34 -0300

When developing some CLI applications in Go, I always consider the main.go file as “the input and output port of my application.”

Using Golang stdlib interfaces

Tue, 07 Jun 2022 20:03:34 -0300

In this post, I’ll show you how to use two of the most exciting features of the Go language: its standard library (the stdlib in the title) and its interfaces.

Testing Generics in Go

Fri, 11 Mar 2022 08:27:10 -0300

It’s finally (almost) among us!

Finally, after years of hearing that joke “what about Generics?” this long-awaited feature will be available in version 1.18 of the language, scheduled for release in March 2022.

Accessing Postgres via REST using pRest

Tue, 31 Aug 2021 22:48:39 -0300

In this post, I’m going to talk about a handy Open Source tool called pRest.

Microservices in Go using the Go kit

Tue, 16 Feb 2021 08:33:24 +0200

In one of the chapters of the book Microservice Patterns: With examples in Java the author mentions the “Microservice chassis” pattern:

Profiling Golang applications using pprof

Wed, 08 Apr 2020 08:33:24 +0200

In the last few weeks, Codenation has been experiencing very significant growth. Confirming the sentence of the great Bruno Ghisi who says that “on the scale everything breaks”, features that always worked perfectly become problematic.

Processing parquet files in Golang

Tue, 10 Dec 2019 10:54:24 +0200

In this post, I will talk about a relatively new data file format, and how to use it in Go.

Using Golang as a scripting language

Thu, 08 Aug 2019 10:54:24 +0200

Among the technical decisions we made during the development of [Codenation] (https://codenation.dev), one of the right ones was to choose Go as the main language.

Object Calisthenics in Golang

Sat, 01 Jun 2019 10:54:24 +0200

Jeff Bay introduced the term Object Calisthenics in his book [Thought Works Anthology] (https://pragprog.com/book/twa/thoughtworks-anthology). It is a set of good practices and programming rules that can improve the quality of our code.

Data Migration with Golang and MongoDB

Wed, 23 Jan 2019 10:09:24 +0200

One item addressed by the twelve-factor app method is the automation of administrative processes, such as script execution and data migration. This is exactly what I will talk about in this post: how we automate the migration of data using Go and MongoDB.

Monitoring a Golang application with Supervisor

Wed, 28 Nov 2018 10:54:24 +0200

Dear reader… If you are reading this post a few years after his publication date you must understand that in 2018 we were very excited about things like micro services, Docker, Kubernetes and related technologies.

Golang: using build tags to store configurations

Mon, 25 Jun 2018 08:54:24 +0200

One of the 12 factor, a methodology for building software-as-a-service apps, is:

Store config in the environment