About Unravel Health

Unravel Health is developing a handheld saliva-based at-home lab that quantifies multiple hormones and biomarkers in under 90 seconds. Developed on patented biosensor technology, over 8 years it enables daily, non-invasive measurements of up to 16 markers from a 10 µL sample. This is transforming how we understand one of the most fundamental parts of women's health - their fluctuating hormone trends over time.

About the Role

We are looking for a highly experienced and motivated Senior Materials Scientist/Microfluidic Engineer to lead material innovation and process development for our microfluidic cartridge devices.

Responsibilities

• Lead material innovation and process development for microfluidic cartridge devices.
• Hands-on experience in microfluidic device design, prototyping, and testing.
• Develop scalable manufacturing processes with a focus on cost-effectiveness and yield improvement.

Technical Expertise

• Hands-on experience in microfluidic device design, prototyping, and testing.
• Deep knowledge of polymers, composites, coatings, and surface treatments for microfluidic and diagnostic applications.
• Familiarity with microfabrication and assembly techniques (e.g., bonding methods, lithography, laser cutting, 3D printing, or injection moulding).
• Proficiency in characterisation tools (mechanical, thermal, surface, and optical) and statistical methods for quality control.
• Knowledge of fluid dynamics, reagent compatibility, and biofouling mitigation in microfluidic environments.
• Experience with freeze-drying (lyophilisation) techniques for stabilising biological reagents.
• Expertise in long-term reagent storage, stabilisation strategies, and integration into diagnostic devices.
• Experience in working with biosensors (electrochemical, optical, or immunoassay-based).
• Familiarity with CAD software (SolidWorks or AutoCAD) for device design.
• Knowledge of regulatory and quality standards (ISO 13485, medical device development).
• Background in sustainability and recyclability of materials in device design is an advantage.

Qualifications

• PhD (preferred) or Master’s degree in Materials Science, Biomedical Engineering, Chemical Engineering, or a related discipline.
• Strong background in microfluidics, biosensors, or lab-on-a-chip technologies.
• Proven experience in materials integration into functional devices and understanding of system-level performance requirements.

Personal Attributes

• Strong creative problem-solving abilities with high attention to detail.
• Very self-directed
• Excellent teamwork and cross-disciplinary communication skills (working closely with biologists, chemists, and engineers).
• Commercial awareness with focus on device performance, user experience, and cost constraints.
• Proactive, innovative, and motivated to contribute in a fast-paced start-up environment.

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Engineering and Information Technology

Industries

• Health and Human Services