9 Mothers · 2 days ago
Digital Signal Processing Engineer (Acoustic)
Austin, TX
Full-time
Onsite
Senior Level
$150K/yr - $250K/yr9 Mothers is a funded startup building autonomous machines for defense markets. They are seeking a Senior Acoustic DSP & Real-Time Beamforming Engineer to design algorithms that turn raw multichannel audio into reliable bearings and alerts, optimized for low-latency execution on edge hardware.
Defense & Space
No H1B
U.S. Citizen Only
Responsibilities
Build the DSP Pipeline: Design and implement the full pipeline, including framing/STFT, filtering, coherence features, and noise/wind handling
Implement Beamforming & DoA: Compare and deploy approaches like MUSIC, ESPRIT, and MVDR, selecting the best strategy based on real-world field metrics
Hardware Partnership: Translate physical constraints (mic spacing, SNR limits) into algorithm decisions to ensure hardware and software are perfectly synced
Create Evaluation Infrastructure: Curate datasets and build replay harnesses and error taxonomies to answer "why did it fail" with data-driven certainty
Edge Optimization: Optimize for compute limits on CPU/GPU with deterministic behavior and robust fallbacks for high-stakes environments
Qualification
Required
Demonstrated success delivering real-world multichannel audio, radar, or sonar systems validated on messy, imperfect data
Strong beamforming/DoA fundamentals and sensitivity to calibration errors (phase errors, channel mismatch)
Proficiency in Python and C++/Rust with the ability to productize, profile, and optimize code
A mindset that iterates from measurements: logging → hypothesis → change → field verification
This position requires access to export-controlled information under ITAR. Only U.S. persons are permitted to access such information
Must be willing to submit to a background check
Preferred
Embedded deployment experience (NVIDIA Jetson)
Acoustic tracking, temporal smoothing, or multi-source handling
Prior defense startup experience
Company
9 Mothers
Cost effective C-UAS. AI detection, tracking and defensive systems.
Founded in 2024
2-10 employees
Funding
Current Stage
Early StageCompany data provided by crunchbase