Cirrus Logic

Low power audio and mixed-signal ICs

Embedded Software Engineer

Embedded EngineeringConfirmed live in the last 24 hours

Full-timeNo salary listed

About the Job

Requirements

Strong professional experience developing embedded firmware in C/C++ for microcontrollers and/or digital signal processors.
Hands-on experience with RISC-V and/or Arm Cortex-M/A architecture, including interrupts, memory, caches, and performance characteristics.
Understanding of register-level programming, memory-mapped input/output, concurrency involving interrupt service routines and real-time operating system tasks, race conditions, timing determinism, fixed-point arithmetic, numerical precision, and overflow/underflow management.
Ability to optimize firmware through cycle counting, memory layout, direct memory access usage, cache behavior, and minimizing latency and jitter.
Familiarity with GCC/LLVM-based toolchains, cross-compilation, CMake/Make, Meson, linker scripts, and map files.
Hardware and firmware debugging skills, including JTAG/SWD debugging and root-cause analysis of timing and performance issues.
Expertise with Git and disciplined engineering practices, including code reviews and continuous integration.

Responsibilities

Design, implement, and maintain embedded firmware for digital signal processor cores and microcontrollers using RISC-V and/or Arm.
Build and optimize real-time signal-processing pipelines using fixed-point and/or floating-point arithmetic, potentially including fast Fourier transforms, filters, modulation/demodulation, codecs, feature extraction, or control loops.
Develop firmware using C/C++ and selective assembly where appropriate, focusing on performance, memory, and power optimization.
Work with system-on-chip and board peripherals, including direct memory access, timers, SPI, I²C, UART, I²S/TDM, PWM, GPIO, and relevant bus fabrics.
Bring up new hardware by handling boot flows, clocks, memory maps, interrupt vectors, peripheral initialization, and early validation.
Implement and debug drivers and real-time operating system components, such as Zephyr or equivalent, including task scheduling, synchronization primitives, and interrupt service routine design.
Develop unit-test, hardware-in-the-loop, test-automation, and manufacturing/production diagnostic strategies.
Use JTAG/SWD, logic analyzers, oscilloscopes, trace tools such as ETM/ITM, and cycle-accurate profiling tools when available.
Collaborate with hardware, FPGA/ASIC, systems, and application teams to define requirements and interfaces.
Create architecture notes, interface specifications, timing budgets, work packages, and bring-up guides.
Participate in code reviews and help establish best practices for embedded quality, safety, and maintainability.

Desired Qualifications

Knowledge of Python for test tooling or scripting, and optional assembly.
Experience with Zephyr or embedded Linux, including embedded Linux on Arm.
Experience with JTAG/SWD debuggers, GDB, OpenOCD/J-Link, logic analyzers, oscilloscopes, and trace tools.
Experience with profiling, timing analysis, unit and integration testing, and continuous integration/continuous delivery for embedded systems.
Experience with digital signal processing libraries and techniques such as CMSIS-DSP or vendor libraries, and SIMD/vector optimization patterns.
Familiarity with bootloaders, secure boot, over-the-air update mechanisms, and field diagnostics.
Understanding of digital communications, audio, or signal-processing domains.
Exposure to safety/security standards such as MISRA C/C++, IEC 61508, and ISO 26262.

For over four decades, Cirrus Logic has been propelled by the top engineers in mixed-signal processing. Our rockstar team thrives on solving complex challenges with innovative end-user solutions for the world's top consumer brands. Cirrus Logic is also known for its award-winning culture, built on a foundation of inclusion and fairness, meaningful community engagement, and delivering enjoyable employee experiences at every turn. But we couldn’t do it without our extraordinary workforce – and that’s where you come in. Join our team and help us continue to make Cirrus Logic an exceptional place to grow your career!

We’re looking for an Embedded Software Engineer who thrives close to the hardware and enjoys building high-performance, reliable firmware for DSP architecture and microcontrollers (e.g., RISC V and Arm Cortex M/A). You’ll design and implement real-time embedded software, optimize compute-heavy pipelines, and collaborate with hardware and systems teams to bring products from concept to production.

This role suits someone who can move comfortably between architecture/design, low-level firmware, and performance tuning—especially where latency, throughput, power, and determinism matter.

Key Responsibilities:

Design, implement, and maintain embedded firmware for DSP cores and MCUs (RISC V and/or Arm).
Build and optimize real-time signal-processing pipelines (fixed-point and/or floating-point), potentially including FFTs, filters, modulation/demodulation, codecs, feature extraction, or control loops.
Develop firmware using a mix of C/C++ (and selective assembly where appropriate), with strong focus on performance, memory, and power optimization.
Work with SoC/board peripherals: DMA, timers, SPI, I²C, UART, I²S/TDM, PWM, GPIO, and relevant bus fabrics.
Bring up new hardware: boot flows, clocks, memory maps, interrupt vectors, peripheral init, and early validation.
Implement and debug drivers and RTOS components (e.g., Zephyr or equivalent), including task scheduling, synchronization primitives, and ISR design.
Develop test strategies: unit tests, hardware-in-the-loop tests, test automation, and manufacturing/production diagnostics.
Use debugging/profiling tools: JTAG/SWD, logic analyzers, oscilloscopes, trace (ETM/ITM), and cycle-accurate profiling when available.
Collaborate cross-functionally with hardware, FPGA/ASIC, systems, and application teams to define requirements and interfaces.
Contribute documentation: architecture notes, interface specs, timing budgets, work packages, and bring-up guides.
Participate in code reviews and help establish best practices for embedded quality, safety, and maintainability.

Required Skills and Qualifications:

Strong professional experience developing embedded firmware in C/C++ for MCUs and/or DSPs.
Hands-on experience with RISC V and/or Arm architecture (Cortex M/A), including interrupts, memory, caches, and performance characteristics.
Solid understanding of embedded software fundamentals:
register-level programming, memory-mapped I/O
concurrency (ISRs, RTOS tasks), race conditions, timing determinism
fixed-point arithmetic, numerical precision, and overflow/underflow management
Proven ability to optimize firmware: cycle counting, memory layout, DMA usage, cache behavior, minimizing latency and jitter.
Comfortable with toolchains and build systems:
GCC/LLVM-based toolchains, cross-compilation
CMake/Make, Meson, linker scripts, map files
Strong debugging skills with hardware and firmware:
JTAG/SWD debugging
root-cause analysis of timing and performance issues
Source control expertise (Git) and disciplined engineering practices (code reviews, CI).

Preferred Skills and Qualifications:

Languages: C, C++, (optional) assembly, Python for test tooling/scripts
Architectures: RISC V, Arm Cortex M/A, DSP cores
RTOS/OS: Zephyr, embedded Linux (optional)
Tools: JTAG/SWD debuggers, GDB, OpenOCD/J-Link, logic analyzer, oscilloscope, trace tools
Practices: profiling, timing analysis, unit/integration testing, CI/CD for embedded
Experience with common DSP libraries/techniques (e.g., CMSIS-DSP, vendor DSP libs) and SIMD/vector optimization patterns.
Experience with Zephyr, or embedded Linux on Arm.
Familiarity with bootloaders, secure boot, OTA update mechanisms, and field diagnostics.
Understanding of digital communications, or audio, processing domains.
Exposure to safety/security standards (e.g., MISRA C/C++, IEC 61508, ISO 26262)

This Newbury or London based role is a hybrid remote position and will follow a 2 day in-office work schedule, with in-office days based on business needs and team preference. You must be based within commutable distance of the work location listed on the job posting, or willing to relocate prior to beginning employment with Cirrus Logic.

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Export control restrictions based upon applicable laws and regulations would prohibit candidates who are nationals of certain embargoed countries from working in this position without Cirrus Logic first obtaining an export license. Candidates for this role must be able to access technical data without a requirement for an export license. We are unable to sponsor or obtain export licenses for this role.

At Cirrus Logic, we believe that diversity drives innovation, and we are committed to encouraging an open and collaborative culture where different approaches, ideas, and points of view are respected and valued. We aim to promote a workplace where everyone can contribute irrespective of race, colour, national origin, religion or belief, gender or gender identity, sexual orientation, age, marital status, pregnancy status, or disability.

About the Company

Cirrus Logic

Low power audio and mixed-signal ICs

Cirrus Logic designs low-power, high-precision mixed-signal ICs and software for audio and control, serving mobile, smart home, and wearable markets. Its devices provide audio processing, voice capture, and control features integrated into consumer electronics, focusing on power efficiency. The company differentiates itself by specializing in power-efficient, high-precision audio and mixed-signal technology and by pairing silicon with software, services, and development tools for manufacturers. Its goal is to be a leading supplier of audio and mixed-signal solutions that improve user experiences in mobile, smart home, and wearable devices while maintaining strong governance and ESG commitments.

Company size: 1,001-5,000
Company stage: IPO
Headquarters: Austin, TX
Founded: 1984

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