Gábor Mezei
Embedded Software Developer at Arm
Budapest, Central Hungary
Summary
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RockstarGábor Mezei is an embedded software developer based in Budapest with six years of professional experience and a decade-long career in embedded and security-focused roles across companies like Arm, Mentor Graphics, and Siemens. He specializes in low-level firmware and secure coding practices, demonstrated by his contributions to the widely used mbed TLS library where he implemented memory zeroization, refactored cleanup paths, and mitigated information-leak and return-value issues. At Arm he continues to apply this blend of systems-level engineering and security hardening to shipped products, while earlier roles ranged from antivirus engine development to telecom and EDA software. He brings a pragmatic focus on resilient, auditable code and a track record of improving real-world cryptographic and embedded codebases. Colleagues describe him as detail-oriented with a penchant for fixing subtle vulnerabilities that often go unnoticed until exploited.
6 years of coding experience
11 years of employment as a software developer
Hungarian, English
Github Skills (10)
c1710
memory-management10
c1110
cryptography10
security10
tls139
libtls9
ssl9
tls129
mtls9
Programming languages (3)
Github contributions (5)
Mbed-TLS/mbedtls
Apr 2020 - Dec 2022
An open source, portable, easy to use, readable and flexible TLS library, and reference implementation of the PSA Cryptography API. Releases are on a varying cadence, typically around 3 - 6 months between releases.
Role in this project:
Security Engineer
Security EngineerContributions:519 reviews, 541 commits, 72 PRs in 2 years 8 months
Contributions summary:Gábor's contributions focused on enhancing the security of the mbedtls library through code hardening. They implemented memory zeroization for plaintext and internal buffers, local variables in PKCS and SHA algorithms to erase sensitive data and prevent potential vulnerabilities related to information disclosure. The user also addressed a return value overriding issue. Furthermore, the user refactored code to ensure proper cleanup before returns, improving the library's resilience against potential glitch attacks and enhancing overall security.
cryptography-libraryapisslcryptographycryptography-api
gabor-mezei-arm/mbedtls-framework
Jun 2024 - Mar 2025
TF-PSA-Crypto and Mbed TLS version-independent build and test framework
Contributions:53 pushes, 7 branches in 9 months
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