Essence & Value

Native APIs. True Control. Real Understanding.
SToFU Systems builds software that uses native system APIs across platforms to unlock performance, precision, and behavior impossible at higher levels.

  • Windows Native API (ntdll, Zw/Nt syscalls)
  • Linux syscalls, libc, ld.so, /proc, ptrace, io_uring
  • macOS: XNU internals, Mach ports, IOKit, syscall bridges
  • Embedded: direct memory access, RTOS primitives, custom HALs

When performance, stealth, or deep integration is critical — native APIs are the only real interface.

What You Get?

Architecture-Level Engineering. Platform-Specific Power.
SToFU delivers code that speaks the OS's internal language.

  • System call-level execution pipelines
  • Behavioral control via syscall interception, trampolines, patching
  • Fast, low-overhead implementations
  • OS-internal extension: monitoring, redirection, control
  • Reverse-compatible, real-world resilient logic

Why SToFU? What's Next?

We Code With Purpose. We Build for Growth.

  • 10+ years of engineering in critical systems
  • Deep expertise in architecture, security, performance
  • Battle-tested teams with product mindset, system-level thinking
  • Transparent sprints, predictable delivery, zero dead weight

Send your spec or challenge and:
→ Receive a system design + execution plan in 24h
→ Build software that scales and integrates deep