Patrick Marmaroli
Freelance
Audio Signal Processing, Machine Learning & Fullstack Dev
Based in France, Annecy / Geneva border area
Freelance
Audio Signal Processing, Machine Learning & Fullstack Dev
Based in France, Annecy / Geneva border area
Signal processing engineer with a PhD from EPFL and 15+ years of experience engineering audio products and software. I combine deep expertise in DSP and ML with full-stack delivery — frontend, backend, cloud infrastructure, and databases. Since August 2026, I work full-time as an independent freelancer, providing custom software and R&D consulting spanning audio & acoustic signal processing, machine learning, and enterprise business software, from architecture to deployment — through Hidacs Sàrl for consulting, and Vocametrix for audio technology development dedicated to speech therapy (orthophonie). I run an AI-assisted development workflow that lets me own the entire stack single-handedly, end to end — architecture, implementation, testing, and deployment. Previously Senior Audio Engineer at Microsoft (Teams audio quality), 2022–2026.
Vocametrix OÜ · Tallinn, Estonia
Voice-controlled games and audio analysis tools for speech therapy. Web platform combining pronunciation assessment, pitch tracking, and gamified exercises, backed by a speech processing API suite serving both the platform and external developers.
Hidacs Sàrl · Lausanne, Switzerland
R&D consulting in signal processing, machine learning, and web development — feasibility studies, proof-of-concepts, and prototyping for speech, industrial, environmental, and health applications, alongside full-stack web platform development for enterprise and multi-stakeholder clients. Delivered ERP, e-signature, and timesheet portal systems for multi-partner organizations.
Microsoft · Tallinn, Estonia
Sound quality engineering for Microsoft Teams — audio processing pipelines, quality metrics, and signal analysis at scale.
Development of an anti-spoofing technology using ultrasound for identity verification liveness detection.
EARSENS project — privacy-preserving indoor activity detection using electrodynamic loudspeakers and AI, without microphones. Co-authored publication in Applied Acoustics (January 2023).
HED Technologies · Geneva, Switzerland
Designed and implemented signal processing algorithms (echo cancellation, noise reduction, voice command recognition) and contributed to headphone acoustic design. Led R&D efforts growing the Audio Department from scratch to a 4-engineer team, steering algorithm development from prototype to validated product.
PRONA SA · Yverdon, Switzerland
Developed custom Matlab tools and data processing pipelines for building and environmental acoustic analysis. Conducted normative acoustic measurements and managed multidisciplinary acoustic projects for industrial, institutional, and private clients.
EPFL · Lausanne, Switzerland
Designed audio signal processing algorithms and conducted laboratory and field experiments within European research projects. Collaborated with industrial partners including Phonak (hearing aids), FIAT, and ARMASUISSE. Supervised interns and PhD students.
Swiss Federal Institute of Technology (EPFL) · Switzerland
Bimodal sound source tracking applied to road traffic monitoring.
Université du Sud Toulon-Var · France
Signal processing, psychoacoustics, and trajectography.
ISEN Toulon · France
Lycée Lachenal · Argonay, France