Otávio is a security researcher focused on low level. Otavio acted in most of RE-related fields: reversing binaries/malwares (Mobile & Desktop), firmwares and protocols; Vulnerability research on IoT field, Hardware Analysis & firmware extraction, python automation and embedded devices development.
Also, in his spare time, he make posts on his blog and develop some tools RE-related:
Blog: https://estr3llas.github.io/
Github: https://github.com/estr3llas
LinkedIn: https://www.linkedin.com/in/otavio8664/