Mario Souza

Firefox extension to enhance Linkedin's Job Search Results UX by purifying it with some AI power. I created this project to learn how to create browser extensions and to help folks looking for jobs providing visa sponsorship.

My team implemented a new invocation pattern that lets functions progressively stream response payloads back to clients. The new invocation allows customers to build functions that return larger payloads and perform long-running operations while reporting incremental progress.

I led the initiative to make it operationally ready for production, by deg and writing tests (integration, smoke, canary), defining and publishing metrics, configuring alarms, building dashboards, updating… Mostrar más

My team implemented a new invocation pattern that lets functions progressively stream response payloads back to clients. The new invocation allows customers to build functions that return larger payloads and perform long-running operations while reporting incremental progress.

I led the initiative to make it operationally ready for production, by deg and writing tests (integration, smoke, canary), defining and publishing metrics, configuring alarms, building dashboards, updating runbooks, etc. Mostrar menos

My team implemented a feature to improve the performance of Lambda functions (primarily Java) during cold starts.

I led the initiative to make it operationally ready for production, by deg and writing tests (integration, smoke, canary), defining and publishing metrics, configuring alarms, building dashboards, updating runbooks, etc.

Participated in a patent (to be published) for an internet traffic optimizer in traffic engineering space.

Led the initiative to influence in the reduction of launching new AWS locations by automating infrastructure provisioning for a fleet of Network Telemetry service. Reduced the launch of the service from weeks to a few days.

We refactored our CI/CD platform to ease the whole process and start giving developers more control over their applications.

The following is a list of some changes we've made so far to the platform:

1. Switched from Web UI to Jenkinsfile.
a. use gitflow when making changes to our pipelines;
b. more control and flexibility over the jobs, since we can write shell and groovy scripts;
c. abstraction of common functionalities.

2. Creation of a base image for our PHP… Mostrar más

We refactored our CI/CD platform to ease the whole process and start giving developers more control over their applications.

The following is a list of some changes we've made so far to the platform:

1. Switched from Web UI to Jenkinsfile.
a. use gitflow when making changes to our pipelines;
b. more control and flexibility over the jobs, since we can write shell and groovy scripts;
c. abstraction of common functionalities.

2. Creation of a base image for our PHP microservices.
a. common logic got centralized into base layers;
b. [almost] empty Dockerfile for all microservices, since they extend the base image;
c. upgrade of common libraries got easier and reliable.

3. Caching of application dependencies.
a. we map a volume outside the container (e.g.: ~/.composer:/root/composer);
b. decreased our build time by a factor of 5... super-fast builds!.

Technologies and tools:
- Docker (Swarm mode, Registry, Compose, Dockerfile)
- Jenkins (Jenkinsfile, Groovy, shell script)
- Consul
- confd
- NGINX
- PHP (FPM, Phalcon, Behat, PHPUnit) Mostrar menos

When I got to TOTVS, the development team was deploying to the development environment using only git push/pull and it was very complicated to tell which version of the software was deployed. We also had to manage testing, releasing and restarting of the application manually.

So, I decided to help us solve those issues by building a CI/CD deployment pipeline with a job template for some phases of the pipeline, such as code pull, test, release, push and deploy of our apps etc. So any… Mostrar más

When I got to TOTVS, the development team was deploying to the development environment using only git push/pull and it was very complicated to tell which version of the software was deployed. We also had to manage testing, releasing and restarting of the application manually.

So, I decided to help us solve those issues by building a CI/CD deployment pipeline with a job template for some phases of the pipeline, such as code pull, test, release, push and deploy of our apps etc. So any developer who wanted to create a new job, didn't have to do much work.

Besides building the whole infrastructure on top of VMWare/CentOS, I've also created a private Docker registry and a shell script to handle [magically] our deploys.

After the release of the project, our deploys to the development environment became more reliable, faster and fun. :)

Technologies and tools:
- Jenkins
- Docker
- VmWare
- CentOS
- Go
- Shell scripting Mostrar menos

Built a system to provision OpenStack's cloud resources - such as compute, database, network, storage - based on events. It was a key component for TOTVS strategy to customers with a hybrid cloud environment, for cost savings purposes.

Technologies and Tools:
- Golang (gin, ginkgo, logrus, streadway/amqp, caarlos0/env)
- RabbitMQ
- MySQL
- Graylog
- Jenkins, Docker
- CentOS 7, RHEL 7

I've contributed to the development of walmart's marketplace onboarding platform for sellers from Brazil.

The main objective of this project was to speed up the onboarding process of new sellers which wanted to sell products in walmart's website, which used to take one to six months, and, after the release of the MVP, has dropped to a few days.

The project was developed using the newest open-source technologies available, with a diversified stack:
- Java 8 (Dropwizard, Spring… Mostrar más

I've contributed to the development of walmart's marketplace onboarding platform for sellers from Brazil.

The main objective of this project was to speed up the onboarding process of new sellers which wanted to sell products in walmart's website, which used to take one to six months, and, after the release of the MVP, has dropped to a few days.

The project was developed using the newest open-source technologies available, with a diversified stack:
- Java 8 (Dropwizard, Spring, Jetty, Oleaster/jUnit/Mockito, Hibernate, Maven)
- Node.js (Kraken.js, Mongoose, Jasmine)
- MongoDB, Oracle Database, Redis, RabbitMQ
- HTML, CSS, Javascript (AngularJS)
- Jenkins, Docker, Rundeck, Chef Mostrar menos

We've made some improvements to the existing project which was written in java (backend) and ruby (web interface), making it more reliable, scalable and modular, to the fast growing of walmart's marketplace in Brazil.

I've contributed to the project setting up and writing unit tests, refactoring the pub/sub module and working close to QA to help writing functional and acceptance tests using cucumber framework.

Technologies and Tools:
- Java (Jetty, Spring… Mostrar más

We've made some improvements to the existing project which was written in java (backend) and ruby (web interface), making it more reliable, scalable and modular, to the fast growing of walmart's marketplace in Brazil.

I've contributed to the project setting up and writing unit tests, refactoring the pub/sub module and working close to QA to help writing functional and acceptance tests using cucumber framework.

Technologies and Tools:
- Java (Jetty, Spring, Hibernate, jUnit, Maven)
- Ruby (Active , Cucumber)
- Python (Tornado)
- MySQL
- Chef, Jenkins Mostrar menos

I've contributed to make our Brazilian platform and integrate with Walmart's global ecosystem.

In this project, I had the chance to work with some of the most organized teams I've ever worked with, which enabled me to get better on planning, writing, executing, validating and measuring the results of the released features.

I also got in touch with XP concepts, such as pair programming, extensive code review, unit testing every piece of code, writing of clean and readable… Mostrar más

I've contributed to make our Brazilian platform and integrate with Walmart's global ecosystem.

In this project, I had the chance to work with some of the most organized teams I've ever worked with, which enabled me to get better on planning, writing, executing, validating and measuring the results of the released features.

I also got in touch with XP concepts, such as pair programming, extensive code review, unit testing every piece of code, writing of clean and readable code, etc.

Technologies and Tools:
- Ruby (Ruby on Rails, RSpec, Bunny)
- MySQL, RabbitMQ
- HTML, CSS, Javascript Mostrar menos

Development of JavaScript-based real-time applications to provide to the s the hottest and latest posts published from the most popular Brazilian blogs from the internet, in a new and rich design.

Developed components:
- hottest posts from our blog network
- latest posts from blogs ordered by category
- real-time web feed

Technologies and Tools:
- Isotope (http://isotope.metafizzy.co/)
- Real-time messaging framework… Mostrar más

Development of JavaScript-based real-time applications to provide to the s the hottest and latest posts published from the most popular Brazilian blogs from the internet, in a new and rich design.

Developed components:
- hottest posts from our blog network
- latest posts from blogs ordered by category
- real-time web feed

Technologies and Tools:
- Isotope (http://isotope.metafizzy.co/)
- Real-time messaging framework (http://framework.realtime.co/messaging/)
- Node.js
- Jasmine (BDD framework)
- Bitbucket
- Sublime Text Mostrar menos

We've developed a background processing application which consumes data of Brazilian professional leagues of football clubs from a service provider, stores it on MongoDB and make use of its aggregation framework to group all the information which is served via an API to the components from iG's Sports website.

Technologies and Tools:
- Node.js (background worker)
- MongoDB
- AWS (EC2)
- Puppet
- Jasmine (BDD framework)
- Sublime Text
- Bitbucket

Client-side quiz application developed using browsers' default Local Storage API, OOP oriented (through Javascript's prototype pattern) and cross-browser.

Technologies and Tools:
- HTML, CSS and Javascript
- Com, Grunt.js
- Sublime Text
- Bitbucket

Client-side application fully-developed using Javascript, Isotope (animation framework) and the RealTime framework to provide to the s a rich experience on the most reading news from iG's Ultimo Segundo portal in real-time, without page refresh.

Technologies and Tools:
- Javascript, HTML and CSS
- Grunt.js, Com
- Isotope (isotope.metafizzy.co)
- RealTime (realtime.co/developers/realtimeframework)
- SublimeText
- Bitbucket

One of the first projects I worked on while working at iG, focused on LGBT audience.

Technologies and Tools:
- HTML, CSS and JS
- jQuery
- Com, Gruntjs
- Bitbucket
- Sublime Text