Engineering

Rafael Zeffa

Senior Software Engineer

  • Londrina, Brazil

  • Technologist in Information Systems, Universidade Norte do Paraná
  • 11
    Years of Experience

Professional Bio

My mother bought our first computer when I was 13. I started using the internet and wanted to create a website for bands that I liked, so I learned HTML. From then on, i never stopped learning new things. I love to be challenged every day and am thrilled when people use the software I develop to make their lives easier. My favorite technology is JavaScript because it runs fast, and it runs on both the client-side and the server side. As a full-stack developer, it’s amazing to use the same language on back-end and front-end, and it has thousands of great libraries and frameworks. I'm open-minded and hardworking, and when I'm not programming, I enjoy playing soccer, which I like to do every week with my wife and son.

Latin America
Londrina, Brazil

Technology Expertise

  • Expert label
    Expert
  • Intermediate label
    Intermediate
React.js (Expert)
Node.js (Expert)
Javascript (Expert)
GraphQL (Expert)
Java (Expert)
HTML5 (Expert)
PostgreSQL (Expert)
Angular.js (Intermediate)
PHP (Intermediate)
Ionic (Intermediate)
CSS (Intermediate)
MySQL (Intermediate)
DevOps (Intermediate)
AWS (Intermediate)

Featured References

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Employment History

FullStack Labs February 2021 - Present

Senior Software Engineer

At FullStack Labs, I'm responsible for delivering client solutions using React, Node.js, and more.

Clevertech July 2019 - January 2021

Full Stack Developer

Clevertech provides development of custom software, MVP's, and SaaS platforms, as well as business & systems integration. As a Full Stack Developer, I worked on:

  • The eCommerce platform for Ace of Air, a sustainable wellness brand. I worked in a distributed Agile team architecting and building the company's eCommerce platform from scratch. I implemented the business logic for order placement, payment, taxes, shipping, inventory, and warehouse management. I was also responsible for integrating third-party services like Stripe, TaxJar, and UPS. The platform was built with Node.js, React, React Native, GraphQL, Apollo, PostgresSQL, Redis, AWS, and Kubernetes.
X-Brain October 2016 - July 2019

Tech Lead / Full Stack Developer

X-Brain is a Brazilian software consultancy. As a Tech Lead and Full Stack Developer, I worked on:

  • Conexão Claro Brazil, and app for managing telecommunication services sales. I led a small team of developers and drove internal adoption of the new stack and Agile methodologies and introduced a code-quality pipeline, including unit/integration tests, code review, continuous integration, and continuous delivery. These improvements helped the team to be more efficient and reduced the number of defects in production. The app was built with Node.js, React, Java, Spring-Boot, MongoDB, Oracle, Redis, Elasticsearch, RabbitMQ, Jenkins, and Docker.
Veltec Technological Solutions April 2015 - October 2016

Full Stack Developer

Veltec is the main supplier of onboard technologies for vehicles' telematics, focused on accident prevention and reducing fleet operation costs. As a Full Stack Developer, I worked on:

  • Vfleets, an online platform to monitor vehicles through graphic indicators, driver rankings, GPS monitoring, and more. I built services to collect data from different sources to create real-time dashboards and developed UI components. The platform uses Java, Spring Boot, Angular, TypeScript, PostgresSQL, Redis, AWS, and RabbitMQ.
Latin America
Latin America

Portfolio

Vfleets

Vehicle fleet mgmt.

Java, Angular, TypeScript

Conexão Claro Brazil

Telecommunications sales

Node.js, React, Java

Ace of Air

Sustainable wellness

Node.js, React, React Native

Thought Leadership

Employment History

FullStack Labs February 2021 - Present

Senior Software Engineer

At FullStack Labs, I'm responsible for delivering client solutions using React, Node.js, and more.

Clevertech July 2019 - January 2021

Full Stack Developer

Clevertech provides development of custom software, MVP's, and SaaS platforms, as well as business & systems integration. As a Full Stack Developer, I worked on:

  • The eCommerce platform for Ace of Air, a sustainable wellness brand. I worked in a distributed Agile team architecting and building the company's eCommerce platform from scratch. I implemented the business logic for order placement, payment, taxes, shipping, inventory, and warehouse management. I was also responsible for integrating third-party services like Stripe, TaxJar, and UPS. The platform was built with Node.js, React, React Native, GraphQL, Apollo, PostgresSQL, Redis, AWS, and Kubernetes.
X-Brain October 2016 - July 2019

Tech Lead / Full Stack Developer

X-Brain is a Brazilian software consultancy. As a Tech Lead and Full Stack Developer, I worked on:

  • Conexão Claro Brazil, and app for managing telecommunication services sales. I led a small team of developers and drove internal adoption of the new stack and Agile methodologies and introduced a code-quality pipeline, including unit/integration tests, code review, continuous integration, and continuous delivery. These improvements helped the team to be more efficient and reduced the number of defects in production. The app was built with Node.js, React, Java, Spring-Boot, MongoDB, Oracle, Redis, Elasticsearch, RabbitMQ, Jenkins, and Docker.
Veltec Technological Solutions April 2015 - October 2016

Full Stack Developer

Veltec is the main supplier of onboard technologies for vehicles' telematics, focused on accident prevention and reducing fleet operation costs. As a Full Stack Developer, I worked on:

  • Vfleets, an online platform to monitor vehicles through graphic indicators, driver rankings, GPS monitoring, and more. I built services to collect data from different sources to create real-time dashboards and developed UI components. The platform uses Java, Spring Boot, Angular, TypeScript, PostgresSQL, Redis, AWS, and RabbitMQ.