Kallel R.

Back-end and Systems Engineer

Mid-Level Back-end Developer
2/1/2023 - 10/1/2023

Designed and built automated interaction systems with external platforms for buying and selling miles and air tickets using Node.js, Puppeteer.js, Python Selenium, and PyAutoGUI. Developed an algorithm for calculating the preference of which robot would perform the requested process based on success rate, received requests, queue requests, and recent robot failures. Conducted successful pentesting of a mobile application to obtain legitimate access tokens for use in projects requiring logins.

Back-end Developer
2/1/2022 - 10/1/2022

Developed APIs and front-end clients utilizing Node.js, Vue.js, and TypeScript, alongside MySQL. Managed deployment processes on AWS for private clients. Achievements include automating deployment on AWS using Docker, docker-compose, and GitHub actions, resulting in reduced development costs and increased project delivery speed.

Back-end Developer
2/1/2021 - 12/1/2021

Handled back-end projects for various clients, including small businesses and public agencies, primarily utilizing Node.js, Heroku, and PostgreSQL for API implementation. Achievements include planning and developing an internal platform for the Court of Justice of the State of Sergipe, significantly enhancing process efficiency and reducing the time required for the preparation of dispatches and judicial decisions.

Software Developer
8/1/2019 - 12/1/2020

Developed and implemented data collection and automated data cleaning solutions using Node.js, Puppeteer.js, AWS Lambda, EC2, and MongoDB for compliance and KYC. Achievements include implementing a system to check criminal backgrounds, legal proceedings, and traffic contingencies in public sources, resulting in a 20% increase in the detection of fraudulent and/or malicious profiles. Successfully migrated the automated data collection project from AWS Lambda to EC2, enhancing speed and reliability while also reducing costs.

Developer at PDIAP - Digital Platform for Registration and Project Administration
2/1/2017 - 12/1/2017

Developed advanced programming skills in JavaScript utilizing Node.js, AngularJS, and Express, while effectively managing and maintaining non-relational databases like MongoDB. Created comprehensive documentation of the platform to ensure seamless knowledge transfer and ease of understanding. Implemented rigorous software version control practices using GitHub, supporting collaborative development and maintaining code integrity. Delivered user support to assist with technical issues, conducted detailed log analysis to troubleshoot and optimize system performance, and performed security testing to safeguard against vulnerabilities.

Mathematics at Federal University of Santa Maria
2021 - 2025

Computer Science at Federal Institute of Southern Rio Grande
2014 - 2017

Introduction to Hacking and Pentest at Solyd | Treinamentos e cursos online
8/1/2019

Roadsec at Flipside
9/1/2017

17th International Free Software Forum - Internet of Things or People at Associação Software Livre.Org
7/1/2016