Systems and kernel software engineer specializing in operating system internals, low-level concurrency, and mission-critical flight software architecture.
I build execution runtime... Show moreSystems and kernel software engineer specializing in operating system internals, low-level concurrency, and mission-critical flight software architecture.
I build execution runtimes, microkernel primitives, and line-rate packet engines from first principles focusing on deterministic real-time scheduling, memory safety, and hardware capability enforcement.
Key Technical Focus & Active Work:
• Flight Software & Space Systems:
Ported NASA's Core Flight System (cFS) natively to Exploidus OS (custom capability microkernel) with zero portable core patches. Implemented native OSAL/PSP syscall mappings, a deterministic 100 Hz minor-frame scheduler (SCH), double-buffered Table Services (TBL) for live GNC PID parameter hot-reloading, and BLAKE3 capability-gated effector actuation. Co-authored the Community Security Architecture Proposal v0.1 presented on NASA cFS Discussion #1168.
• Operating System Development:
Architected Exploidus OS, a security-oriented x86-64 microkernel featuring intent-based preemptive scheduling (INTENT_COMPUTE), userspace atomic futex primitives (SYS_FUTEX), and ExFS (crash-consistent filesystem with provenance records).
• High-Throughput Linux Networking & eBPF:
Engineered aegis-filter / xdp-guard (pure Rust), a line-rate Layer-4 ingress defense engine operating at the NIC driver layer (XDP_DROP) to mitigate multi-million PPS volumetric floods before sk_buff kernel memory allocation. Published on crates.io.
• Open Source Contributions:
Identified and resolved an inherited 1-bit specification discrepancy in the CCSDS File Delivery Protocol (CFDP) Metadata PDU closure-requested flag within NASA's F Prime framework (PR #6143, verified by NASA core maintainers).
Core Stack:
C (C99/C11), C++20, Rust, x86-64 Assembly, Linux Kernel Internals, Microkernels, eBPF/XDP, Futex, QEMU, GDB.
Code & Repositories:
• Personal GitHub: https://github.com/rahadbhuiya
• Exploidus Labs: https://github.com/Exploidus
• Research Site: https://exploidus.com Show less
rahadbhuiya
@rahadbhuiya
Rahad Bhuiya
Linux Kernel & eBPF Engineer | Rust Systems | NASA cFS | sched-ext Contributor
About
Systems and kernel software engineer specializing in operating system internals, low-level concurrency, and mission-critical flight software architecture.
I build execution runtime... Show more
I build execution runtime... Show more
Top Skills
linux kernel
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rust
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eBPF
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C
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C++
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Python
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x86 Assembly
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Flight Software
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State Estimation / Sensor Fusion
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Robotics Operating System (ROS)
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Operating Systems
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Real-Time Operating Systems (RTOS)
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Kernel Programming
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Virtual Memory / Memory Management
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Computer Architecture
Experience
Founder & Open Source Systems Developer
Exploidus
May 2026 - PresentUpstream: VSCode CLI (#341565) · NASA F Prime CFDP fix (#6143, #6226) · Subsurface (#5055, #5071)
Security: CNSL — correlated SIEM, kill-chain, STIX 2.1, MITRE ATT&CK, Kubernetes, OT/ICS
Kernel/eBPF: xdp-guard (XDP firewall, Rust/Aya) · aegis-filter (eBPF+UKF, no_std, ROS 2) · scx_intent (sched-ext PR #3845)
Aerospace: cfs-adversarial-testbed (eBPF/NASA cFS) · cfs-on-exploidus (cFS OSAL port)
Systems: Exploidus OS · browser_engine (Rust) · Yolish (C) · HuddleCluster
Contributions
Articles
- Porting NASA's Core Flight System (cFS) to our Custom OS — cfs-on-exploidusNov 01, 2026
- How a single 1-bit shift bug stayed hidden in NASA's communication protocol for years.Oct 10, 2026
- Building aegis-filter: Why Standard Kalman Filters Fail in Adversarial EnvironmentsOct 09, 2026
- Building a Line-Rate Linux Kernel Firewall in Pure Rust with Aya and eBPF/XDPOct 03, 2026
- Writing a Programming Language & Native x86-64 Compiler from Scratch in C: The Story of YolishSep 26, 2026
Comments
- @[grinch]
Thanks for the great question, @grinch!
The PSP integrati...Nov 02, 2026
- Great write-up! Separating classification from authorization is spot o...Oct 14, 2026
- @[Goofy]
Thanks for reading!
In quantitative terms, the difference ...Oct 10, 2026
- @[Mike Dabydeen]
That math on the ~16.7M /24 prefixes is precisely ...Oct 08, 2026
- @[Mike Dabydeen]
@Mike Dabydeen Spot-on analysis, thank you for the ...Oct 07, 2026
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