Senior Biomedical Signal Processing Scientist

About the role

LifeLens Technologies, Inc. is a medical device developer located in Ivyland, PA, pioneering innovative, next-generation treatment devices for personal health monitoring. You will develop and validate algorithms that turn signals from the Company's multi-sensor wearable hubs — including PPG, ECG, and accelerometry — into clinical and consumer health measurements. The role spans offline analysis of high-volume clinical and field recordings and real-time algorithms that run on the device. You will own algorithms from first prototype through clinical validation and regulatory submission, working closely with hardware, firmware, and clinical teams. As the Company expands into consumer products, you will help shape which measurements it offers and how they perform in everyday wear. This is a full-time, on-site position.

Responsibilities

• Designing and validating algorithms that derive physiological measurements from multiple sensors, including PPG, ECG, and accelerometry.
• Conducting offline analyses of large clinical and field datasets to discover, characterize, and quantify signal behavior, failure modes, and algorithm performance.
• Developing methods robust to motion artifact and other real-world conditions.
• Adapting validated algorithms for real-time use on the device, working with firmware engineers on implementation.
• Designing and analyzing validation studies against clinical reference devices, using statistically sound methods of agreement and accuracy.
• Producing verification and validation evidence and documentation to support regulatory submissions.
• Writing efficient, tested, and reproducible code.
• Communicating results to technical and nontechnical audiences.
• Collaborating across engineering disciplines to solve problems, improve existing products, and meet deadlines.
• Mentoring junior team members.
• Other tasks as assigned.

Requirements

Education and experience: PhD with 2+ years of relevant experience, master's degree with 5+ years, or bachelor's degree with 7+ years. Degree in biomedical engineering, electrical engineering, neuroscience, physics, applied mathematics, computer science, or a related quantitative field preferred. Postdoctoral and other research experience counts toward relevant experience.

Core competencies:

• Strong foundation in digital signal processing and time-series analysis.
• Experience developing algorithms for physiological or other noisy real-world sensor signals.
• Expertise in Python, or expertise in MATLAB and willingness to transition to Python.
• Experimental design and applied statistics, including method-comparison analysis.
• Working knowledge of machine learning methods and when they are appropriate.
• Data analysis and visualization skills.
• Ability to own problems from open question to validated result.
• Ability to communicate complex technical concepts effectively.

Supervisory responsibilities: None. Provides technical mentorship to junior team members.

Qualifications

• Experience with PPG, ECG, SpO2, respiration, or other biosignal algorithms.
• Background in neural or cardiac electrophysiology or optical recording (e.g., calcium imaging, fiber photometry, cardiac optical mapping).
• Experience with event detection and point-process analysis in noisy time series.
• Experience with motion-artifact reduction and sensor fusion.
• Experience with real-time or embedded algorithms; working knowledge of C.
• Experience developing medical devices under FDA design controls, such as 510(k) submissions.

Schedule

In office: some flexibility in hours is allowed, but the employee must be available during core business hours of 9:00 am to 5:00 pm and must work at least 40 hours a week to maintain full-time status. This role also requires occasional after-hours and weekend availability. Some travel to support customers at their location may be required.

Benefits

• Health Insurance
• Dental & Vision Insurance
• Paid Time Off
• 401(k)
• Stock option incentive plan
• FSA & dependent care

Pay

The expected base salary range for this position at hiring is $110,000 – $160,000/yr. This salary range reflects the minimum and maximum base pay that LifeLens expects to pay for this position at the time of this posting. Individual base salary for a successful candidate is determined by qualifications, skill level, experience, competencies and other relevant factors.