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# Remote Linux Embedded / Systems Software Engineer - Audio & USB HID

- **Company:** ZENOVO LTD
- **Location:** London, UK (Remote available)
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Application Programming Interfaces (APIs), Advanced Linux Sound Architecture, Data Analysis, C++ (Programming Language), Encodings, Codecs, Debian Linux, Software Debugging, Linux, Linux on Embedded Systems, Service Development Studio, Software Engineering, Software Systems, Data Streaming, System Programming, Data Logging, Low Latency, OPUS (Software)
- **Published:** August 10, 2026
- **Apply:** https://uk.indeed.com/viewjob?jk=8cbb2bef0f8cec7c

## About the Role

* Strong C/C++ systems programming
 * Proven Linux/Debian daemon or service development
 * Practical experience with systemd
 * Linux audio (PipeWire, PulseAudio or ALSA)
 * USB device communication (USB HID, hidraw, libusb, composite devices, hot-plug handling)
 * Real-time or near-real-time audio/data streaming
 * Familiarity with Opus or similar low-latency codecs
 * Ability to debug across application, OS, audio and USB boundaries
 * Experience analysing and porting Windows code to Linux

Desirable

 * Embedded Linux
 * BLE / DA14531 or similar
 * Custom USB HID protocols
 * Kiosk / unattended system experience
 * Windows-to-Linux ports
 * Audio latency and codec pipeline debugging

## Description

* Set up the Debian build/test environment and create a production-ready systemd service that starts at boot and recovers from failures.
 * Analyse the existing Windows listener, extract portable C/C++ logic, and replace Windows-specific APIs with Linux equivalents.
 * Capture system audio from the default output using PipeWire or PulseAudio (WASAPI loopback equivalent), handle device hot-swap and idle/silent states with low CPU usage.
 * Encode audio (Opus), chunk into 64-byte HID packets, and implement the required notification/header protocol.
 * Enumerate the composite USB device, locate the correct HID interface, and communicate via hidraw or libusb.
 * Handle USB attach/detach, reconnect, write failures and buffer overruns robustly.
 * Implement the shared command protocol (no API changes) and provide matching stub handlers.
 * Deliver diagnostic logging with parity to the Windows tool (audio level, VID/PID, connection status, errors, etc.).
 * Perform side-by-side validation against the Windows version and Android reference app for audio quality, latency, framing and stability.