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Long Wall

Produces hypersonic testbeds and defense interceptors

FPGA Design Engineer

Full-Time
$135k - $225k/yr
Senior
Bachelor's, Master's
Long Beach, CA, USA
In Person
Hardware EngineeringSilicon & ASIC Design
No H1B Sponsorship

About the job

Requirements
  • A bachelor's degree in Electrical Engineering, Computer Engineering, or a related field.
  • At least 5 years of hands-on FPGA development experience with AMD/Xilinx platforms.
  • Expert-level knowledge of Xilinx FPGA architectures and Zynq System-on-Chip platforms.
  • Strong understanding of digital design principles, timing analysis, and clock domain crossing techniques.
  • Experience with the Xilinx Vivado design suite for synthesis, implementation, and debugging.
  • Demonstrated ability to bring FPGA designs from concept through production.
  • Extensive experience troubleshooting designs and resolving integration issues.
  • Proficiency in hardware description languages, including VHDL and/or Verilog/SystemVerilog.
  • Proven experience with Vivado and Vitis toolchains, including IP integration, timing constraints, and build automation.
  • Experience developing custom IP cores with register interfaces, interrupt generation, and DMA engine integration.
  • Understanding of high-speed serial interfaces and multi-gigabit transceiver architectures.
  • Strong knowledge of streaming video and data architectures, including buffering strategies, flow control, and memory management.
  • Experience implementing high-speed communication protocols, including PCIe Gen 1 through Gen 5 and 1G/10G/25G Ethernet MAC/PHY layers such as SGMII, RGMII, and UXSGMII.
  • Experience designing and optimizing streaming DMA architectures and high-throughput data paths.
  • Experience with multi-clock-domain design, including proper clock domain crossing techniques and metastability mitigation.
  • Ability to collaborate with software engineers on hardware/software interfaces, including memory-mapped register design and interrupt architecture.
  • Strong debugging skills using Vivado ILA, VIO, oscilloscopes, and logic analyzers.
  • Proficiency with Git and continuous integration/continuous delivery workflows for FPGA development.
  • Ability to sit or stand for extended periods.
  • Ability to use a computer to complete assignments.
  • Ability to communicate with individuals and groups in person, by phone, and through telepresence.
  • Ability to lift up to 12 pounds.
  • U.S. person status is required to access information protected under U.S. export control laws, including ITAR and EAR.
  • The employee will typically work in an office environment.
Responsibilities
  • Design, implement, and verify FPGA firmware for AMD/Xilinx-based systems, including SoC and ACAP architectures.
  • Debug and validate firmware through hardware-in-the-loop testing and system integration.
  • Collaborate with hardware engineers to define FPGA I/O requirements and board-level interfaces.
  • Collaborate with software engineers to design CPU driver interfaces for custom IP cores.
  • Create and maintain technical documentation, including design specifications, timing reports, and test plans.
  • Contribute to architecture decisions for FPGA and embedded systems and participate in design reviews.
Desired Qualifications
  • A master's degree in Electrical Engineering, Computer Engineering, or a related field.
  • Develop high-performance data paths and interfaces, including PCIe, Ethernet, and streaming DMA systems.
  • Experience with Versal ACAP systems and Network-on-Chip design requirements and profiling.
  • Experience with Xilinx High-Level Synthesis for algorithm acceleration.
  • Experience with Versal AI Engine development and optimization.
  • Knowledge of AXI/AXI-Stream protocols and custom IP core development.
  • Experience with video processing pipelines, frame buffering, and line buffering architectures.
  • Understanding of driver development concepts and register-level programming interfaces.
  • Familiarity with embedded Linux and Xilinx PetaLinux for Zynq systems.
  • Experience with signal processing algorithms and digital signal processing optimization on FPGAs.
  • Understanding of power optimization techniques for FPGA designs.
  • Python and TCL scripting for design automation and verification.
  • Exposure to functional verification methodologies and simulation tools such as ModelSim and Vivado Simulator.
  • Experience with board bring-up and hardware/software co-design.
  • Experience with hardware-in-the-loop test methodologies and integration.

About the company

Long Wall repurposes its rocket and ground-system heritage to serve U.S. defense needs. Its RSX is a hypersonic flight-test vehicle used to test and replicate missile threats, Ironwood is a containerized ground system for rapid, on-demand launch, and Cyclops is a surface-launched exoatmospheric interceptor designed to attack missiles in midcourse. The company focuses on government and defense applications with U.S.-based manufacturing and an integrated set of launch, test, and intercept hardware. Its goal is to strengthen national security by providing ready-to-use, deployable missile-defense testing and interception capabilities for the U.S. military.

Company Size

51-200

Company Stage

Grant

Total Funding

$659.9M

Headquarters

Long Beach, California

Founded

2025

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Simplify's Take

What believers are saying

  • June 2026 Pentagon hypersonic activity validates demand for responsive test and interceptor systems.
  • Long Wall raised fresh capital in July 2026, extending runway to 2027 programs.
  • The 2025 rebrand aligned hiring and facilities around defense, improving government procurement fit.

What critics are saying

  • No public Cyclops contract was disclosed by December 2025, leaving demand unproven.
  • ABL's 2023 launch failure and 2024 fire destroyed credibility before the defense pivot.
  • SpaceX and Lockheed Martin dominate contracts; Long Wall risks becoming a niche supplier.

What makes Long Wall unique

  • Long Wall's 2025 pivot repurposed RSX and Ironwood for missile defense, not launch.
  • Cyclops targets exoatmospheric interceptors with containerized launch, aiming at low-cost magazine depth.
  • Its 160,000-plus square feet can produce over one hundred Cyclops rounds yearly.

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Benefits

  • Health Insurance
  • 401(k) Retirement Plan
  • Remote Work Options
  • Paid Vacation
  • Paid Holidays
  • Flexible Work Hours
  • Wellness Program
  • Mental Health Support
  • Phone/Internet Stipend
  • Home Office Stipend
  • Conference Attendance Budget
  • Professional Development Budget

Growth & Insights and Company News

6 month growth

-1%

1 year growth

-1%

2 year growth

-13%
Defense Daily
Oct 22nd, 2026
MDA awards Long Wall $75M to complete flight testing of low-cost Cyclops interceptor

The Missile Defense Agency (MDA) has awarded California-based startup Long Wall $75 million to complete flight testing of Cyclops, its low-cost midcourse defence interceptor, the company said Thursday. Long Wall began developing Cyclops in 2024 and announced it in late 2025. The system is a surface-launched, mass-producible exo-atmospheric interceptor. At the time, the company said it aimed to reduce limits on where Cyclops can be fired, giving the military more flexibility.

AAM Nation
Jun 11th, 2025
Heart Aerospace Appoints Brittany Churchill As Vice President Of Operations

Heart Aerospace appoints Brittany Churchill as Vice President of Operations.

TechCrunch
Nov 15th, 2024
After raising nearly half a billion dollars, ABL Space pivots from launch vehicles to missiles

ABL had been developing a small launch vehicle called RS1 and a mobile ground system designed to fit inside a shipping container, with aspirations to bring truly portable, responsive launch to the market for the first time.

Offshore Magazine
Jul 2nd, 2024
ABL providing rig inspection services to Petronas offshore Indonesia

ABL has secured a one-year contract from Petronas to perform rig inspection services for its facilities offshore Indonesia.

SpaceNews
Jun 10th, 2024
Scout Space telescope to hitch a ride on ABL rocket

WASHINGTON - Scout Space, a startup specializing in space domain awareness through in-space observation, announced June 10 it signed a launch services agreement with ABL Space Systems.