About Joya Systems

Kernel depth for production driver work.

Joya Systems provides Windows device driver development, Linux custom driver development, macOS driver development, and OS kernel internals consulting.

For more than 20 years, Joya Systems engineers have solved complex Windows driver development and kernel engineering problems. We help companies build, debug, port, and maintain production drivers while keeping deployment, administration, and end user interaction practical.

Check out some of our past driver development projects.

Joya Systems is a boutique kernel engineering consultancy specializing in Windows driver development, Linux kernel development, macOS system extensions, and firmware adjacent systems software. We were founded on the premise that these domains reward depth over breadth. Many firms can write application code; very few can correctly design a Windows file system minifilter, debug a race condition in a production StorPort miniport, or port a security agent from Windows to Linux without introducing new failure modes.

We stay focused on this vertical because the details decide whether a driver ships, survives production load, and avoids driver induced bug checks in the field.

Over the course of dozens of completed driver projects, we have worked across every major Windows driver framework: WDM, KMDF, UMDF, NDIS, WFP, the minifilter model, and StorPort. Our engineers have shipped production drivers for storage vendors, security companies, gaming platforms, medical device manufacturers, and industrial hardware vendors.

What distinguishes Joya Systems from most Windows consulting firms is cross platform kernel capability. The same engineers who write Windows minifilter drivers also write Linux eBPF programs and macOS Endpoint Security extensions. This matters to companies building security products, storage systems, and infrastructure software that must run across platforms, because one firm can own the kernel layer without a handoff between specialists who do not share a common technical vocabulary.

Our team is made up of engineers who write production kernel code, not consultants who manage engineers who write production kernel code. Jose Flores founded the firm after years of working at the deepest levels of the Windows kernel ecosystem, including contributing to the development of one of the industry's most respected kernel-mode debuggers. See our management bios for individual profiles, and our past projects for a representative sample of completed work.