Efe Gürkan.Security engineering,quietly.
I build calm software around hostile systems — offensive security research, internal tooling, and the boring infrastructure that keeps things boring.
02Selected work
Things I've made, mostly quietly.
A short list. Production over portfolio — most of what I'm proud of lives behind NDAs, but these can stand in the open.
01Personal Growth
App Storev1.0.1
A mobile health app designed to help users quit smoking naturally through motivation and habit tracking. It makes your journey to a healthy, smoke-free life easier and more rewarding.
View all projects01 total
03Writing
Long-form, infrequent.
Notes from the field. Mostly security writeups, the occasional essay on how teams think under pressure.
Read all writing00 pieces
Curriculum Vitae2026 · v3.1
Efe Gürkan
Security engineer · [email protected]
Experience
Senior Security EngineerNorthbound Capital · Internal red team, audit tooling
2023 — Now
Security ResearcherHalfshell · Reversible hardening, Linux internals
2021 — 2023
Software EngineerQuietnet (acq.) · Backend, infrastructure
2018 — 2021
Selected publications
Calm threat models for small teams · USENIX ;login: 49(2)
2025
Reversible hardening as continuous compliance · ACSAC
2024
Skills
RustGoTypeScriptLinux internalsDetection engineeringOffensive securityCryptographyDistributed systems
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05Contact