Sebastian Lackner
Manager Product Development Software Architect at CODEFY
Heidelberg, Baden-Württemberg, Germany
Summary
👤
Senior🎓
Top SchoolSebastian Lackner is a software architect and product development manager with 12 years of hands-on experience building secure, system-level software and developer tools. As co-founder of Sysmagine he created SemanticDiff, a change-visualization product that speeds code reviews by hiding irrelevant edits and surfacing refactorings and moved code blocks. He pairs startup product leadership with deep low-level expertise demonstrated by substantive contributions to gocryptfs and the Wine/WineVDM projects, including security hardening and Windows internals work. Based in Heidelberg, he blends pragmatic engineering, security-minded backend development, and academic rigor from his MSc in Computer Science. Colleagues describe him as the kind of engineer who spots costly developer workflow inefficiencies and turns them into product features.
12 years of coding experience
2 years of employment as a software developer
Master of Science - MS Informatik, Master of Science - MS Informatik at Heidelberg University
German, English
Github Skills (24)
filesystem10
wp-api10
fuse10
windows10
linux10
winapi10
c1110
security10
c1710
system-calls10
go10
golang10
ws-api10
server10
wine10
Programming languages (8)
Github contributions (5)
rfjakob/gocryptfs
Nov 2017 - May 2019
Encrypted overlay filesystem written in Go
Role in this project:
Back-end Developer / Security Engineer
Back-end Developer / Security EngineerContributions:86 commits, 49 PRs, 242 comments in 1 year 5 months
Contributions summary:Sebastian primarily contributed to the security and functionality of the gocryptfs filesystem. Their work involved adding new features like generating master keys from `/dev/random` and addressing several security vulnerabilities related to file and directory access, including fixes for long filename handling, directory IV management, and potential race conditions. They also implemented improvements related to the handling of plaintext names, and contributed various bug fixes and testing improvements.
golangfuseencryptedoverlaygo
wine-mirror/wine
Jun 2015 - Feb 2021
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 commits in 5 years 9 months
Contributions summary:Sebastian primarily contributed to the Wine project's backend infrastructure, focusing on system-level interactions and API implementations. Their commits involve modifying core system calls, such as `NtQueryInformationThread`, and making improvements to file handling and the registry. The changes also extend to modifying server-side code and protocol definitions to accommodate the modifications. The user's work enhances Wine's compatibility layer for running Windows applications.
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