Mar – Jun 2019 · 4 months
Original design (patented)
Designing the device and defining a method for the simultaneous measurement of a patient's parameters — the basis of the European patent filing.
Selected work
Portfolio
One flagship project that defines my profile — documented end to end — and the student startup where the maker mindset began.
01 — Flagship
Pneumoscope — an AI-powered connected diagnostic device
The Pneumoscope is a connected diagnostic device — a smart, digital stethoscope — designed to capture several physiological signals at once (digital lung auscultation, pulse oximetry and contact thermometry) and to surface AI-assisted detection of respiratory pathology at the point of care.
As Head of R&D at Geneva University Hospitals (HUG), I owned the device end to end: from the original patented design through electronics, miniaturization and a 3D-printed enclosure, to a CE-mark compliant Class IIa medical device produced at industrial scale.
2019 – 2025
EU MDR · Class IIa CE
European patent (granted 2025)
Nature Digital Medicine
Clinical across 5 countries
1.5M CHF funding
That's me, building a Pneumoscope by hand — from the first component to a finished, CE-mark compliant device. I take hardware all the way.
↳ Retrospective
From concept to industrialization — 29 steps, 2019 → 2025
Every stage of the journey, exactly as it happened — design, electronics, prototypes, clinical trials, regulatory testing and industrial production.
V1 · 2019 – 2021
Proof of concept
Proving the idea: from the patented concept to a working 3-in-1 prototype and a first companion app.
Jul – Sep 2019 · 3 months
Electronics PoC (audio + oximeter)
Rapid prototyping to benchmark existing electronic-stethoscope and pulse-oximeter solutions.
Oct – Nov 2019 · 2 months
First functional prototype (one sensor)
Miniaturizing the electronics to embed them in a compact, portable case.
Dec 2019 · 1 month
Testing case finishing
Testing different techniques and methods for the 3D-printing finishing of the housing.
Jan – Dec 2020 · 12 months
Second prototype (2 sensors)
Optimizing the electronic design to include a transmission pulse oximeter, with hepia's electronics & optoelectronics labs.
Jan – Jun 2021 · 6 months
Designing acoustic characteristics
Optimizing and characterizing the acoustic signal, with hepia's acoustics & electronics labs.
Jun – Sep 2021 · 4 months
Optimization & adding a 3rd sensor
Optimizing the electronics and adding the contact thermometer, with hepia's electronics lab.
Sep – Dec 2021 · 4 months
3rd prototype (3-in-1)
Validating the technical feasibility of a 3-in-1 device: digital stethoscope, contact thermometer and pulse oximeter.
Jan 2020 – Dec 2021 · 2 years
First App (PoC)
A proof-of-concept app communicating over BLE with the Pneumoscope, plus a mock-up of the final app design tested with end-users.
V2 · 2022 – 2024
MVP
An industrial-grade redesign with end-users, a clinical-grade prototype and a first clinical trial.
Jan 2022 – Mar 2023 · 14 months
Designing the Pneumoscope MVP
Designing a tool that meets user and technical requirements, based on the patented design. (with BUREAU 141)
Jan 2022 – Dec 2023 · 2 years
Co-development with end-users
Interviews, rapid prototyping and user tests to validate design, ergonomics and functions with doctors, nurses and pharmacists. (with BUREAU 141)
Aug – Oct 2022 · 3 months
Audio optimization (2nd iteration)
Optimizing the acoustic signal against the specs of 3M™ Littmann® CORE & 3200 digital stethoscopes.
Nov 2022 – Dec 2023 · 13 months
Industrialization of the electronics
A complete redesign of the electronics to meet industrial and regulatory standards.
Jan – Apr 2023 · 4 months
Electronics implementation
Redesigning the inside of the case to fit the new electronic board.
May – Jun 2023 · 2 months
Photo shooting
Producing communication material for product and business development. (with BUREAU 141)
Jun – Dec 2023 · 6 months
Product pre-testing (CT & CE)
Pre-testing prototypes in lab with EMC and electrical-safety tests to meet medical standards.
Jan – Apr 2024 · 4 months
First medical-compliant prototype
Producing prototypes for the first Pneumoscope clinical trial to validate hardware performance.
Jun 2023 – Apr 2024 · 10 months
Second App (MVP)
Updating the app to include the DeepBreath AI model and an offline mode for clinical studies.
May – Aug 2024 · 4 months
Clinical trial #1 — HUG, Geneva
Setting up Pneumoscope packs for the clinical study at Geneva University Hospital on 250 patients.
2024 · Results
Results of clinical trial #1
Two senior doctors blindly rated the quality of 100 recorded lung sounds. The Pneumoscope was preferred over the 3M™ Littmann® CORE, and the AI model reached a strong AUC.
64% preferred vs Littmann COREAI · 0.89 AUC
V3 · 2024 – 2025
Product
Industrialization: plastic injection, CE testing, a granted patent and clinical trials across Africa.
Apr – Jun 2024 · 3 months
Housing industrialization
Optimizing the housing design for plastic injection and assembly.
Jul – Oct 2024 · 4 months
Pneumoscope housing elements
Designing and rapid-prototyping housing elements to facilitate production and final assembly.
Nov – Dec 2024 · 2 months
Plastic injected part (FOT)
First-Out-of-Tool plastic-injected part, in biocompatible material.
Sep 2024 – Mar 2025 · 7 months
App beta version (Product)
The final app for the B2B segment (design freeze for CE), meeting user and medical requirements.
Jan – Feb 2025 · 2 months
Clinical study in Congo — setup
Producing and setting up 8 full Pneumoscope packs for the clinical study in the DRC.
29 January 2025
European patent — granted
The European patent protecting the design and method behind the Pneumoscope was granted.
WO2022253723A127 countries
May – Dec 2025 · 7 months
Clinical studies in Africa
Producing and setting up 17 Pneumoscope study packs and training doctors to prepare clinical trials in 4 African countries (Ethiopia, Mozambique, Gabon, Congo).
Jun – Dec 2025 · 6 months
Product testing for CE marking
Testing the device in an accredited lab (Eurofins) for CE marking: EMC/radio, biocompatibility and electrical safety.
Mar – Dec 2025 · 10 months
Product industrialization
Producing the first industrialized batch (100 units) with industrial partners.
/ Document
Full development retrospective
The complete 2019–2025 story as a PDF, with every step and visual.
Open PDF / PatentWO2022253723A1
The granted European patent behind the design and method.
View patent / PublicationDeepBreath — Nature Digital Medicine
Automated detection of respiratory pathology from lung auscultation, across 5 countries.
Read paper
02 — Origin
3Dfunlab — where the maker mindset began
While still a microsystems-engineering student, I co-founded 3Dfunlab, a Geneva 3D-printing and rapid-prototyping startup. The mission was to make 3D printing genuinely accessible — and to do it responsibly, with a strong social and environmental focus.
It was my first taste of taking a hardware idea all the way: building the machines, printing for clients, and selling B2B. The venture drew coverage in the Geneva and Swiss business press, was featured live, in prime time, on Swiss national television (RTS — T.T.C.), and was presented at an international youth-entrepreneurship event at the Palais des Nations.
3Dfunlab is secondary to the Pneumoscope — but it's the origin of the builder-and-entrepreneur instinct that defines how I work today.
Co-founder & CTO
2012 – 2016
Hardware & 3D printing
Geneva
Live prime-time TV · RTS
▶ Watch on RTS — T.T.C. “Spéciale innovation” (live, prime time)
RTS · T.T.C. (Toutes Taxes Comprises) — I appeared live, in prime time on this national-TV “Spéciale innovation” show to demo 3Dfunlab's 3D printer.
United Nations · UNCTAD — Global Entrepreneurship Programme, Geneva 2013.