Landon Fuller
Senior Security Engineer at Apple
Boulder, Colorado, United States
Summary
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RockstarLandon Fuller is a senior security engineer based in Boulder, Colorado with 23 years of systems and security experience spanning Apple, his own consultancy Plausible Labs, and infrastructure leadership roles. He combines low-level systems expertise—working on projects like libffi (ARM/iOS trampolines) and sslsplit (transparent TLS interception)—with production security engineering at scale. His open-source contributions include OS X compatibility and Mach-O parsing for FreeBSD pkg and enhancements to RxJava’s Scala adapters, reflecting fluency across OS internals, networking proxies, and JVM ecosystems. Known for pragmatic system architecture and hands-on fixes, he often tackles platform-specific edge cases that reveal subtle failure modes few engineers confront.
23 years of coding experience
18 years of employment as a software developer
Github Skills (47)
objective-c10
build-script10
assembly10
ios10
ssl10
tls1210
flow-control10
system-programming10
multiplatform10
package-management10
architecture10
freebsd10
rxjavafx10
work-flow10
cross-platform10
Programming languages (15)
Github contributions (5)
droe/sslsplit
Oct 2014 - Nov 2014
Transparent SSL/TLS interception
Role in this project:
Back-end Developer & System Architect
Back-end Developer & System ArchitectContributions:32 commits in 21 days
Contributions summary:Landon primarily contributed to the core functionality of the `sslsplit` project, focusing on enhancing its capabilities and maintainability. Their work included addressing a crash related to the NAT engine, adding support for group specification when dropping privileges, and integrating the `libproc` library for process information lookup. Furthermore, the user refactored and merged branches, indicating involvement in code consolidation and system design. Their changes suggest expertise in system-level programming and network proxy design.
snisslsplitinterceptionstarttlsfiddler
libffi/libffi
Sep 2010 - Feb 2011
A portable foreign-function interface library.
Role in this project:iOS Developer & System Architect
iOS Developer & System ArchitectContributions:37 commits in 4 months
Contributions summary:Landon primarily focused on adapting the libffi library for use on iOS/ARM platforms. Their contributions included creating an iOS build script, implementing workarounds for the ARM floating-point ABI, and fixing symbol prefixes. A significant portion of their work involved generating and integrating an ARM trampoline table to enable closure support on iOS, addressing restrictions on writable, executable memory.
foreign-function-interfaceportableforeign
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