Lead Human Factors Engineer for at-home blood testing device development. Focus on FDA submissions, usability improvements, and cross-functional collaboration within a startup environment.
Responsibilities
System-Wide Root Cause Analysis
Lead a rapid, structured investigation into Liberty’s sample-success failures across usability, sampling, workflow, error recovery, hardware, firmware, image processing, and environmental factors.
Distinguish between use-related issues and device/system behaviour; provide evidence-based conclusions.
Coordinate with engineering, product, and clinical teams to ensure no root cause domain is missed.
Usability & Human Factors Activities
Conduct task analyses, use-error analyses, and critical-task identification per ISO 62366-1.
Diagnose and mitigate usability issues through improvements to instructions, UI/UX, sampling workflow, and training materials.
Design and run formative evaluations; support summative usability validation for 510(k).
Produce FDA-compliant HF deliverables, including URRA, formative reports, and the Human Factors Engineering Report.
Design & Workflow Mitigation
Recommend pragmatic changes to device behaviour, software, workflow cues, and instructions to increase success rate.
Collaborate with engineering to test changes related to mechanical tolerances, optical/imaging readiness, and sample adequacy.
Validate mitigations through evidence-based testing and statistical analysis.
Regulatory-Ready Documentation Preparation
Prepare (or contribute significantly to) the human-factors components of the 510(k), including structured justification for risk controls and mitigation choices.
Ensure usability and system-behaviour evidence is correctly linked within design controls.
Requirements
5+ years in Human Factors Engineering, usability engineering, systems engineering, biomedical engineering, or equivalent medical-device problem-solving role.
Experience supporting or delivering 510(k) submissions, especially for consumer-use or home-use devices.
Strong grounding in ISO 62366-1, FDA HF guidance, and ISO 14971 risk management.
Demonstrated ability to lead cross-functional root-cause investigations that span usability and system behaviour.
Experience running human-factors testing (formative/summative) and synthesising evidence into regulatory-ready documentation.
Comfortable working in a fast-paced, ambiguous startup environment.
Benefits
A fun and collaborative environment where you get to join a start-up transforming the delivery of cancer care
We give you the tools and the tech you need to get you going
Regular company events and social activities
38 Days Holiday annually (Inclusive of Bank Holidays)
A flexible work environment - our culture is built on trust
Monthly training budget
Professional development and career progression - we want you to achieve your greatest potential here
Collaborations with world-leading research institutions, healthcare providers and companies
Job title
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