Guilherme Oliveira

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Guilherme Oliveira

I'm a passionate developer living and working nowadays in Germany. I have hands-on experience with Golang, PHP Frameworks, JVM (Java and Scala with Play Framework), Databases (MySQL, Postgres), Redis, Javascript Frameworks (AngularJS, ReactJS GruntJS), C++ (Qt), Python ( and much more… Contact me through email, I'm always looking for new challenges and contacts.

About my daily work I use git as my main versioning system and my preferred methodology is Agile based. I don't see myself working without continuous integration or continuous deployment anymore. My favorite stack nowadays is Golang with a microservice architecture focused on small codebases. For cache layer and high performance techniques I use Redis, and for the storage layer I prefer PostgresSQL. API's should follow RESTful standards and authentication must be done following OAuth 2.0 definitions. And all that in a data-driven way which include challenges of receiving, storing and manipulating a huge amount of data, so it is to define A/B testing flows.

From Intern to Leader at Humantech
Graduated as Best Paper 2013
Co-Founder of Five Intl.
Moved to German Market
You tell me!

What I do

I started as a very broad ambitious developer, trying to cover all subjects, but as the years pass, I started to focus on the following topics.

Distributed Systems

Worked with microservers and monolithic architectures, there is a sweet spot between these two architecture that can be bend to provide the best solution for the problem presented.


It is important to make deploy easy for developers. In order to do that without compromising the quality it is indespensible to rely on a good continuous integration system with tests and coverage being triggered automatically.

Open Source

I keep contributing to open source code bases and pushing the companies I work in to become more active in the community.

Agile Teams

It is still a challenge to keep moving forward as the product grows. Keeping the communication direct and fast is one of the most important things inside a development team.

Patience and perseverance have a magical effect before which difficulties disappear and obstacles vanish.


Here are a few projects I worked during my career. There are a lot more, but this ones are legally allowed to be here.


Here you can find some nice comments from collegues I have been working close across the years.

Lars Blumberg

Head of Software Engineering

Guilherme is not only a very carefully and fast learning software engineer. Besides being able to adopt very quickly to new software components, languages, and patterns, he was also an outstanding team colleague. His sharp mind, gentleness and willing to always improve make Guilherme a very valuable team member. I would be very proud if I had the chance to work with him again.

Jonecir Souza

CTO & Consultant

For the past five years, I have been working with Guilherme. Since then, I have gotten to know Guilherme quite well and can thoroughly vouch for his character, professionalism and technical abilities. I have worked with him on close to 15 different IT projects, and I have been constantly impressed with both his technical skills and performance in our field.

André Espeiorin

iOS Developer

Guilherme is a talented language-agnostic programmer. No matter which language, he always begin with the problem itself, this is a rare characteristic nowadays. Also, he has a great team spirit and this makes him easy to fit in any high skilled team.

Edson Mattos

President of Audi C. Inc.

Guilherme is an excellent professional. He is very knowledgeable in everything he does. He always delivers above expectation.

Contact me

Guilherme Oliveira

Software Engineer

Hamburg, Germany