Linux Kernel Engineer

Job Description:

Pay Range: $50-80

6 month contract

We are seeking a senior level Linux kernel engineer to design and implement a kernel level solution that intercepts VFS read/write operations, pins user memory pages, builds scatter gather DMA tables, and offloads the data to a cryptographic accelerator (hardware engine or user space process). The engineer will collaborate with hardware, security, and software teams to deliver a stable, high performance, and secure off load path that complies with company coding standards and regulatory requirements.

Basic Qualifications
• Minimum?2?years of professional experience developing, building, and debugging Linux kernel modules (C language, kbuild/DKMS).
• Strong knowledge of core Linux internals (process scheduling, memory management, synchronization primitives).
• Proficient in systems level C programming and familiar with kernel coding style and static analysis tools.
• Demonstrated understanding of secure coding practices for kernel space (avoid leaks, race conditions, proper error handling).
• Experience working with SELinux/AppArmor or similar LSM frameworks in a production environment.
• Ability to obtain and maintain the required security clearance (Secret/TS).
• Effective written and verbal communication skills; proven ability to produce clear design documentation and work within cross functional teams.

Desired Skills & Experience
• VFS & kprobe/kretprobe – Implemented handlers for vfsread, vfswrite, or similar VFS entry points.
• Page pinning & Memory Management – Used pinuserpagesfast, getuserpages, and managed pin count cleanup.
• Scatter Gather / DMA engine – Built and populated struct sgtable / struct scatterlist; interfaced with dmamapsg / dmaunmapsg.
• Linux Crypto API – Registered and used symmetric/asymmetric algorithms via the Crypto API, including async request handling.
• Kernel Key Management – Managed cryptographic keys with the kernel keyring (keyctl, requestkey) or integrated external KMS/HSM.
• User Space Communication – Designed netlink, character device, ioctl, or shared memory interfaces for status updates and key exchange.
• Testing & Profiling – Created kernel module unit tests (kselftest/kunit), used perf, ftrace, bpftrace for latency/performance analysis.
• Hardware Crypto Offload – Experience with Intel QAT, ARM TrustZone, FPGA based accelerators, or similar off load engines.
• Up stream Contributions – Submitted patches accepted to VFS, Crypto, DMA engine, or related subsystems.
• Trusted Execution Environments / Secure Enclaves – Worked with OP TEE, Intel SGX, or comparable TEEs.
• DPDK or High Performance User Space I/O – Familiarity with DPDK or similar frameworks for user space data paths.
• Certifications – Linux Foundation Certified Engineer (LFCE), CISSP, GSEC, or specialized hardware security training.
• Regulated Industry Experience – Prior work on aerospace, defense, or ITAR controlled projects with required documentation and audit practices.

Benefits provided: 401K, medical, dental, and vision, sick time as applicable to state law

Butler America Aerospace, LLC. is an equal opportunity employer. Butler evaluates applicants without regard to race, color, religion, sex, age, national origin, disability, veteran status, genetic information and other legally protected characteristics. The Butler America Aerospace, LLC. EEO Policy Statement and “Know Your Rights” Poster is available here: Applicant and Employee Notices.

Butler America Aerospace, LLC. is committed to working with and providing reasonable accommodations to individuals with disabilities. If you need a reasonable accommodation because of a disability for any part of the employment process, please contact the Human Resources Department at accommodationsbutler.com.

Job Ident #: 72338

Company Details

Butler Aerospace & Defense

4960 Corporate Drive
Huntsville, Alabama 35805 USA
butler.com/

Solutions Provider! Butler America combines over 60 years of technical services with 21st-century management tools, culture, and business solutions to match the best talent with the best jobs.

Benefits:
We offer full Medical, Dental & Vision plans.

Supported Manufacturers:
Engineering, Telecom, Skilled Labor,IT, Aviation & Aerospace. BAE, UTC, Sikorsky, Rockwell Collins

Supported Models:
C-130 (all models),T44A, T34C, all models of Sikorsky helicopters.

(Job and company information not to be copied, shared, scraped, or otherwise disseminated/distributed without explicit consent of JSfirm, LLC)

Job Info

Location

Owego, New York, United States

Type

Contractor

Company Details

Butler Aerospace & Defense

4960 Corporate Drive
Huntsville, Alabama 35805 USA
butler.com/