On behalf our customer GreenWaves People in Action is looking for a

Senior DSP engineer－ optimization of audio algorithm on GAP architecture

GreenWaves Technologies is a fabless semiconductor company founded in 2014 and based in Grenoble, France. They design and market ultra low power processors for energy constrained products such as hearables, wearables, IoT & medical monitoring products.

GreenWaves’ system-on-chips enable companies to develop and bring to market products with new to world features enabled by state of the art machine learning and digital signal processing techniques. The leading edge development tools enable audio and machine learning developers to productively harness the power of GAP processors.

GreenWaves GAP9 processor powers features such as neural network based noise removal and adaptive noise cancellation, multi-channel spatial sound and listening enhancement technologies in next generation earbuds and headphones with market leading energy efficiency.

As a growing, talented and highly multicultural team with sharp personalities, they are proud of what they do and how they do it. Their non-hierarchical culture means living their core values: ownership, collaboration, agility, dedication to customers and engagement. They believe that work is more than just a to-do list. You are empowered to build a leading company and to share its success!

We are looking for talented, enthusiastic, and committed people to be a part of the GreenWaves family starting up in Denmark.

The GAP architecture brings together three main components: the main CPU, the cluster (parallel processor and inference accelerator for neural networks), and the SFU (low latency audio DSP).

GreenWaves are developing an audio integration framework to leverage the performance of this architecture and ease the co-existence of several real time constrained audio applications. In order to prime the audio ecosystem partners they want to make available, together with this audio framework, a number of classic features like voice pickup, beam forming, acoustic echo canceling, noise reduction, vocoders, basic signal processing libraries, etc.

We are looking for an experienced audio DSP engineer to contribute to port and optimize those features onto the various computing resources of the circuit. For this purpose, you will benefit a number of tools and software that GreenWaves Technologies has developed: GCC compiler with support of CPU DSP extensions, inter-core synchronizations, libraries, simulation and profiling tools, etc.

Development is done in C/C++, both in floating point and in fixed point. The quality of the optimized porting will be assessed against performance and energy efficiency metrics.

This position requires numerous interactions with the different teams of the company: SDK, audio signal processing, AI applications, etc.

Required skills:

• Good knowledge of audio processing and signal processing
• Familiarity with code parallelization (e.g. OpenMP) and vectorization (SIMD)
• Good knowledge of computer arithmetic: fixed-point, floating, quantization, bounding of errors
• Code performance analysis and optimization on hardware target
• Proficient in C/C++ programming
• Familiarity with versioning/revision control systems
• Good level of spoken and written English, to be used daily to communicate with colleagues and international partners
• Organizational skills
• Strong team spirit and communication abilities
• Ability to work autonomously and proactively on assigned tasks

Desired skills:

• Good understanding of the audio applications listed above
• Knowledge of parallel architectures, DSP processors, HW accelerators
• Knowledge of compiler intrinsics (front-end and back-end), especially GCC
• Git proficiency

Are you interested?

Please send your CV to

Applications are evaluated continuously