Leandro Marques Email & Phone Number

Belo Horizonte

I created and maintained web applications built mainly with React as the front end and Elixir with Phoenix as the back end. Some applications also used Python and JavaScript as the backend. Each application provided external APIs built using REST and GraphQL standards, but internally the communication was performed through an Event Driven Architecture, using RabbitMQ as the message broker.We had a strong testing culture and so all applications had extensive test coverage integrated with CI/CD workflows using GitHub.Also built integrations with external systems such as GitHub, Zoom, Slack, and Zendesk.

Belo Horizonte E Região, Brasil

Woking a stack that includes Clickhouse, Elixir, Phoenix, GraphQL and React.We were responsible for creating from the ground a new web platform which provides detailed analysis for homework activities for students, parents, teachers, and coordinators from hundreds of schools in Brazil. The project used as data store Clickhouse, an open-source column-oriented DBMS for online analytical processing. We developed a new GraphQL API, build on top of the Elixir Phoenix Framework, which is consumed by the project front-end. We also built a React component library, intended to be used in various internal projects in the company, including our reports platform.

Belo Horizonte E Região, Brasil

Maintainance and development of AppProva, a platform that helps students prepare for ENEM, Brazil's standardized national exam, which evaluates high school students. The platform allows students to engage in pedagogic activities while providing teachers and schools a variety of analytic report tools which helps them to identify, diagnose and act upon students knowledge gaps.The stack used includes MySQL relational database, Ruby on Rails and JavaScript.We valued processes and practices which helps us to improve software quality, as Code Review, automatic code analysis, TDD and BDD and continuous delivery.I also had a brief experience working a tech lead for a small team.

Belo Horizonte E Região, Brasil

Worked on a stack that included MySQL, Ruby on Rails and JavaScript.Responsible for helping the porting of a health system written in Delphi to the web, using Ruby on Rails as our backend. The system was used in more than 100 cities in Brazil. It was responsible for scheduling medical consultations, issuing and managing exams and so on. We developed internal JavaScript tools aimed at easing the porting process, while also making the user experience as close as possible to the original system.