Jefferson Otoni Lima | Software Architect | AI | Game Development

Jefferson Otoni Lima

@jeffotoni

Senior Software Engineer, Software Architect, Tech Lead, Open Source Contributor, and Game Developer. Passionate about building intelligent systems and high-performance software. ⭐

Belo Horizonte, MG, BRA
S3WF / helloworldhub
jeff.otoni@gmail.com
@jeffotoni
jeffotoni
jeffotoni
@jeffotoni
@jeffotoni
jefferson.otonilima

Development hours
❤️ +20k
Projects carried out
+200
Lectures held
+60
Hours taught in courses
+500

About Jefferson Otoni Lima

I'm a Senior Software Engineer, Software Architect, and Tech Lead with over 25 years of experience building scalable software, distributed systems, cloud-native applications, and high-performance backend platforms.

My work focuses on Software Architecture, Artificial Intelligence, Intelligent Systems, APIs, Cloud Computing, and Open Source. I'm passionate about designing reliable software, creating developer tools, and building modern solutions using Go and other technologies.

I strongly believe in continuous learning, knowledge sharing, and building software that makes a real impact.

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Senior Software Engineer, Software Architect, Tech Lead, Open Source Contributor, and Game Developer. Passionate about building intelligent systems and high-performance software. ⭐

Projects

779 contributions in 2022 ❤️

2,055 contributions in 2021 ❤️

2,768 contributions in 2020 ❤️

3,404 contributions in 2019 ❤️

2,136 contributions in 2018 ❤️

3,231 contributions in 2017 ❤️

Pong • Game Development (Go + Ebitengine)

A classic game built in Go using Ebitengine, highlighting gameplay architecture, rendering loop and input control in a language not originally designed for games.

github.com/jeffotoni/pong

Tetris • Game Development (Go + Ebitengine)

A modern Tetris implementation in Go with Ebitengine, focused on smooth controls, piece logic and score flow in WebAssembly.

github.com/jeffotoni/tetris

Snake • Game Development (Go + Ebitengine)

A classic Snake implementation in Go using Ebitengine, with score progression and responsive gameplay running in WebAssembly.

github.com/jeffotoni/snake

Mario • Platformer Prototype (Go + Ebitengine)

Early platformer prototype built in Go with Ebitengine. Version v0, still under active development.

github.com/jeffotoni/mario

Quick - High-performance Go Web Framework

Go framework focused on performance, simplicity and extensibility, inspired by the best APIs from the Go ecosystem.

Includes chainable middlewares, templates with nested layouts, cache with TTL, structured logger, upload API and a dedicated Quick CLI.

github.com/jeffotoni/quick

⚡ gocache - High-Performance

GoCache is a high-performance, sharded in-memory cache for Go applications, built for speed and efficiency.

Optimized for concurrent read/write operations, combining sharding, lock optimizations and expiration management.

github.com/jeffotoni/gocache

View 120+ Open Source Repositories on GitHub

Site: Meetups

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Site: Go Bootcamp - In person

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Site: https://www.letsgophers.com/

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Channel: https://www.youtube.com/@jeffotoni

Upcoming episodes...

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The Universe of Go Language

Talk delivered in person at Go BH Event 2023. The Universe of Go Language covers history, job market, and language pillars in an overview format.

ZEROHERO PROJECT | jeffotoni

In this hands-on live session, we build a REST API from scratch. I hope it helps as a learning base for many Gophers.

FIRST STEPS IN GO | jeffotoni

In this hands-on live session, we create Go packages and explore how to structure Go projects in practice.

ORGANIZING YOUR GO PROJECT | jeffotoni

In this hands-on live session, we create Go packages and discuss practical ways to organize Go projects.

DevOps Bootcamp - 3rd edition - Jeff Otoni - Go (Golang)

A roundtable with three major IT professionals and market references. Topic: Go - getting started and why to use it.

Sensedia Tech Show #2: Exploring Apache Kafka and Golang

Watch the second episode of Sensedia Tech Show with guest Jeff Otoni.

Meetup Golang Campinas | Using RPC and gRPC in Go

Jefferson Otoni Lima shows how, when, and why Golang microservices should communicate using gRPC.

Engtalks: Episode 2 - Google Cloud PUB/SUB

Is your system slow? Learn how to solve this bottleneck with Google Cloud PUB/SUB.

Engcast #03 - How to improve productivity with Go Lang for Microservices

In this episode, Mafê Luvizotto talks with Jefferson Otoni and André Farina about how companies can improve productivity using Go Lang for microservices.

Engcast #8 - API - Principles, concepts, and how to build

Another #Engcast episode. MaFê Luvizotto, Raphael Rossi, and Jefferson Otoni discuss APIs: principles, concepts, and how to build them.

Meetup DigitalOcean 08/10

Q&A | ZEROHERO

In this compilation video, I answer interesting questions asked during the ZEROHERO Project live session.

Installing and Configuring Go | ZEROHERO

In this video, I teach how to install and configure Go on your machine so we can start working with the language.

Engcast #16 – Quality in software development

In this episode, we discuss how to ensure software quality, covering the importance of code, investment, teams, and testing.

Engcast #15 - What is Data Science and how to work in this area?

In this episode, we discuss what data science is and how to become a data scientist, plus how it relates to AI and Machine Learning.

Engcast #14 - What's new in Go 1.18?

In this episode, with guests André Farina and Guilherme Caruso, we discuss the Go 1.18 release and its main updates.

Engcast #13 - How to take advantage of so many opportunities for developers?

This time, we discuss how to choose among opportunities in a heated IT market. Which factors should you evaluate?

Engcast #12 - Applications of Machine Learning models in time series

Machine Learning in time series provides a complementary approach to statistics, enabling inferences that improve understanding and forecasting.

Engcast #11 - Why is Golang growing so much in the API ecosystem?

In this episode opening season 2, Jefferson Otoni, Leonardo Nascimento, and Vinicius Barreto discuss why Go has grown among developers and become a strong option for building simple, fast, and scalable APIs.

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First Steps in Go

By: jeffotoni

The goal of this post is to introduce why the Go language emerged, present part of its syntax, and show areas where Go is most applied. For everyone who wants to improve...

Is Go Object-Oriented?

By: jeffotoni

Object orientation in Go has become a recurring topic in discussion lists, meetups, and groups. When the subject is OOP in Go, it usually sparks debate...

Why We Love Go! ❤️

By: jeffotoni

Go was designed by Google in 2007 to improve programming productivity in a multicore era, networked machines, and large codebases. The designers wanted to address criticisms of other languages in use...

GoLang — Simplifying Complexity "The Beginning"

By: jeffotoni

There are countless programming languages, and each one was created with a purpose: solving problems. Languages are tools, and we need to know when to use each one...

A Bit About Goroutines in Go!

By: jeffotoni

Goroutines are lightweight and take advantage of available processing power. They exist in the Go runtime space, not directly at the operating system level. A goroutine is a function/method that...

Types of Applications Using Go ❤️

By: jeffotoni

Go is a general-purpose language. It was launched in 2009 to help solve problems in network-layer development, scalability, performance, and productivity...

For DigitalOcean Fans ❤️

By: jeffotoni

Docker is a containerization tool used to provide applications with a filesystem that stores everything needed to run, ensuring the software has a reproducible runtime environment...

On the Road to Go 2.0

By: jeffotoni

Go is on version 1.12.7 and moving toward 2.0. This post presents part of that path being built by the community and the Go development team. We are all on this journey...

Are "getters" and "setters" from Java common in Go?

By: jeffotoni

The concepts of getters and setters are fundamental in object-oriented programming (OOP) and closely tied to encapsulation, one of its pillars. Encapsulation involves...

Proxies and API Gateway: A Deep Journey Through Time and Code

By: jeffotoni

Since the beginning of the web digital era, the way systems communicate has gone through many transformations. In the last decade, especially from the mid-2000s onward, we have experienced...

How singleton pattern works with Golang

By: jeffotoni

I always have to implement Singleton Pattern in my projects, but in Golang there are some peculiarities that we have to take care of. In this article, I will present two ways to implement Singleton using Golang...

Singleton Pattern in C and Threads

By: jeffotoni

I often run into the need to implement the Singleton Pattern, but how does that look in C? There are important points to watch for. I will present two approaches: "Not Thread Safe" and "Thread Safe"...

Workloads: CPU-Bound and IO-Bound

By: jeffotoni

Concurrency in Go is very powerful and also simple to code; that was the intention of the engineers who created Go. Many problems are solved more efficiently with concurrency, and that is Go's strength...

In-Memory Cache Using Go ❤️

By: jeffotoni

If there’s one thing that always saves me in my daily work, it’s in-memory caching. When latency spikes and performance needs to soar, a good cache makes all the difference! Over time, I’ve had the opportunity to test various implementations...

GoLang — Simplifying Complexity "The Beginning"

By: jeffotoni

There are countless programming languages and each one was born with a purpose: “solve problems”. Languages are tools and we will have to know how to use them at the right time. Speaking "as a developer"...