Geyslan Gregório
Runtime at GCern
Brazil
Summary
🤩
Rockstar🎓
Top SchoolGeyslan Gregório is a seasoned runtime and open-source engineer with over 13 years of professional experience and more than two decades coding in C, Assembly and Go on Linux. Currently at Aqua Security, he helps advance Tracee and libbpfgo—projects that leverage eBPF for runtime security and forensics—contributing both kernel-space eBPF C code and Go userland tooling. He has a strong track record in eBPF, networking and container security, having built eBPF managers, maintained KubeArmor libbpf, and improved observability across cloud-native stacks. An active open-source maintainer and Arch package maintainer, he combines academic rigor (an SBSeg-published shellcode paper with honorable mention) with practical DevOps and test automation skills. He also brings uncommon cross-domain experience from enterprise roles including decomposition of monoliths into Go microservices at Coinbase and earlier large-scale operations management in banking. Curious and multidisciplinary, he persistently explores low-level systems, kernel internals, and higher-level backend and infrastructure engineering.
13 years of coding experience
10 years of employment as a software developer
Estácio de Sá UniversityGraduate Studies - Latu Sensu, Labor Law and Labor Procedure Law, Graduate Studies - Latu Sensu, Labor Law and Labor Procedure Law at Centro Universitário Internacional UNINTER
Portuguese, english (oopt c1), japanese (kanas - some vocabulary)
Stackoverflow
1,122reputation
1.3mreached
8answers
3questions
jekyll
top-5%
Github Skills (37)
shellcode10
github-ci10
docker10
assembly10
ebpf10
meta10
libbpf10
linux10
dockers10
bpf10
cicd10
x8610
go10
x86-6410
assembler10
Programming languages (11)
Github contributions (5)
aquasecurity/libbpfgo
Jul 2021 - Jan 2023
eBPF library for Go. Powered by libbpf.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 releases, 247 reviews, 21 commits in 1 year 5 months
Contributions summary:Geyslan primarily contributed to the `libbpfgo` library, focusing on enhancing and extending its functionality. Their work included adding new helper functions, getter methods, and self-tests related to map pinning and other core eBPF operations. They also made improvements to the codebase, such as changing function signatures, to align with the libbpf API and improve the overall usability of the library. Further enhancements included optimization of the ringbuffer test.
bpfgolangebpflinuxlibbpf
aquasecurity/tracee
Jul 2022 - Jan 2023
Linux Runtime Security and Forensics using eBPF
Role in this project:DevOps Engineer
DevOps EngineerContributions:1189 reviews, 23 commits, 613 PRs in 6 months
Contributions summary:Geyslan's commits primarily center around enhancing the repository's build and testing infrastructure. They added a daily tests workflow, including the creation of `test-daily.yaml` and `libbpfgo.sh` scripts. Furthermore, the user integrated badges into the `README.md` to reflect the status of the daily tests. Other commits involve improvements to the logging mechanism, ensuring proper visibility into errors and refining the overall structure of the project.
bpfgolangsecurity-toolssecurityruntime
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.