Jefferson Fernandes

- Developed an A/B Test application for Shopify which helps merchants to compare the performance of different versions of their products. - Developed a content editor where the user can select and customize any visual element of their storefront Stack: React JS, Node JS, Mongo DB, and Heroku

- Developed an API to integrate a logistics startup software with a 3rd party API for validating documents with OCR Stack: Ruby on Rails, SQS (queues), and SNS (pub/sub) - Mentored new engineers in the team defining code quality standards and doing code reviews - Developed a platform in which retail sellers integrated with multiple e-commerce platforms Stack: Node.JS API running as Serverless on AWS Lambda and PostgreSQL - Planned, developed, and maintained the AWS infrastructure with Terraform

- Developed a data visualization software for the marketing team of a publishing company to assist them in creating custom views on their customer dataset Stack: Ruby on Rails and Elasticsearch, and the data transformation with Apache Pig running on AWS - Managed a team for maintaining several Ruby on Rails small projects (with less than 40 hours per month) with three engineers - Developed a quiz app for a newspaper company Stack: Angular JS and Ruby on Rails

In this position, my first one with web development, I worked on several small projects in Ruby on Rails.

In this position, I worked with Microsoft Dynamics AX (Microsoft certified) ERP coding in X++ and working with SQL Server.

In this position, I worked with Visual Basic .NET and Oracle mainly in integrations with government agencies generating financial and tax reports from an ERP System.

Internship in Software Development. Worked mostly with Visual Basic .NET and Oracle.