Embedded Software Engineer

Valiant Technologies LLC; Milpitas (CA); On-site; USD 96,000 - 165,000; Full time

Job summary

Valiant Technologies LLC seeks an expert Embedded Software / Firmware Contractor to design, implement, and optimize high-throughput multi-threaded software for embedded Linux on AMD Xilinx FPGA/MPSoC and RFSoC architectures.

You will accelerate workloads with ARM NEON, develop software drivers to interface with FPGA IP, and profile for deterministic performance, delivering production-grade code and thorough hand-off documentation.

Qualifications

• Expert C/C++ for embedded Linux environments.
• Proficient with ARM NEON SIMD intrinsics and assembly.
• Experience with Xilinx Zynq MPSoC/RFSoC platforms and PetaLinux.
• Deep hardware interfacing knowledge: AXI4, PCIe, AXI DMA, memory mapping.
• Strong multi-threaded, real-time POSIX scheduling experience.
• Familiar with cross-compilers, debuggers, build systems and Git workflows.

Responsibilities

• Design and implement high-throughput multi-threaded software for embedded Linux.
• Accelerate workloads using ARM NEON SIMD intrinsics and assembly.
• Develop software drivers/interfaces for AXI DMA and PL IP blocks.
• Profile, diagnose bottlenecks, and tune for deterministic performance.
• Deliver production-grade code with architectural notes and build/test docs.

Skills

C/C++ expert

ARM NEON SIMD

Multithreading

POSIX threads

Embedded Linux

Tools

GCC/Clang cross-compilation

GDB

Vivado/Vitis

CMake

Git

AXI DMA / DMA-BUF

Job description

We are seeking an expert Embedded Software / Firmware Contractor to design, implement, and optimize high-throughput multi-threaded software for embedded Linux on AMD Xilinx FPGA / MPSoC and RFSoc architectures (e.g., Zynq UltraScale+).

The contractor will be responsible for accelerating critical computational workloads (such as signal processing or array arithmetic) using ARM NEON SIMD instructions and interfacing custom C/C++ applications with hardware IP blocks in the FPGA logic.

Scope of Work & Deliverables

• High-Performance Multi-Threading: Architect and implement efficient C/C++ userspace applications utilizing POSIX threads (pthreads), thread isolation, CPU affinity, and lock-free synchronization routines to handle real-time streaming data on embedded Linux.
• ARM NEON Optimization: Vectorize and optimize critical algorithmic loops using ARM NEON intrinsics and assembly to maximize SIMD throughput on ARM Cortex-A processor cores.
• FPGA Hardware Integration: Develop robust software drivers/interfaces (e.g., Linux UIO, AXI DMA, memory-mapped registers) to exchange data between Linux software applications and custom IP blocks in the Xilinx Programmable Logic (PL).
• Profiling & Performance Tuning: Utilize Linux profiling tools (perf, Valgrind, custom execution benchmarks) to diagnose bottlenecks, optimize cache usage, and ensure deterministic performance.
• Technical Documentation & Code Hand-off: Deliver well-commented, productiongrade source code along with architectural notes, integration build scripts, and test procedures for internal engineering hand-off.

Required Technical Expertise:

• Core Programming: Expert-level C for embedded Linux environments.
• Vector Acceleration: Hands-on proficiency with ARM NEON SIMD intrinsics and assembly-level optimization techniques.
• Xilinx SoC Platform: Demonstrated experience with Xilinx Zynq UltraScale+ MPSoC/RFSoC platforms (PetaLinux).
• Hardware Interfacing: Deep understanding of AXI4, PCIe, AXI DMA engines, and Linux memory management (DMA-BUF, /dev/mem, UIO).
• Multi-Threaded Systems: Solid background in concurrent programming, memory synchronization, and real-time POSIX scheduling.
• Tooling: Expertise with GCC/Clang cross-compilation toolchains, GDB, Vivado / Vitis, CMake, and Git.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.