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The Fountain Group

UX / Usability / Human Factor Engineer

The Fountain Group, Mountain View, California, us, 94039

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Seeking a highly skilled

UX / Usability / Human Factor Engineer

to design, develop, and optimize scalable data infrastructure for AI-driven applications for a global leader in technology, innovation, and consumer electronics, specializing in smartphones, wearables, semiconductors, and digital health solutions.

This is an Onsite position in Mountain View, CA

This role bridges

user research, human factors engineering, and regulatory usability documentation

for both

consumer health

and

Software as a Medical Device (SaMD)

applications.

You’ll collaborate closely with product managers, designers, writers, and software engineers to conduct user research, evaluate usability, and translate findings into actionable insights. The ideal candidate combines deep UX research expertise with a solid understanding of medical usability standards such as

ISO 62366 ,

IEC 62304 , and

ISO 14971 .

Key Responsibilities

Plan and execute usability studies

across both consumer and SaMD workstreams, from early concept through validation.

Collaborate cross-functionally

with Product, Design, Engineering, Regulatory, and Quality teams to align study goals and milestones.

Independently conduct end-to-end research activities

— from stakeholder alignment, study design, and participant recruitment to data analysis, insight synthesis, and executive presentation.

Develop usability engineering documentation, including

human factors validation plans, use-related risk analyses,

and

formative/summative testing reports

in alignment with regulatory expectations.

Translate research findings into design recommendations

that improve product usability, reduce risk, and enhance overall user experience.

Work within 2–4 week research sprints; manage multiple concurrent projects and report outcomes to leadership and cross-functional partners.

Support the development of

mobile and wearable health applications , ensuring usability data integrity for regulatory submission.

Mentor peers on research design, data interpretation, and usability methodologies as part of a collaborative UX research team.

Core Workstreams

Consumer Health Applications:

Support design and usability for digital health and wellness features, including functions for tracking activity, heart rate, sleep, and other personal health indicators.

Medical Device / SaMD Applications:

Lead usability engineering for regulated digital health products, focusing on risk-based human factors design and formal usability documentation for submission to health authorities.

Qualifications

Bachelor’s degree

in Human Factors, HCI, Psychology, Biomedical Engineering, or related field;

Master’s preferred .

7+ years of UX Research or Human Factors Engineering experience , ideally within digital health, SaMD, or connected consumer devices.

Proven ability to

independently design, execute, and report usability studies

using qualitative and quantitative methods (usability testing, contextual inquiry, interviews, surveys, etc.).

Strong understanding of

usability engineering principles

per

ISO 62366 , and familiarity with related standards ( ISO 14971, IEC 62304, ISO 82304-1 ).

Demonstrated experience delivering

research insights that influence design direction

and improve user engagement and safety.

Excellent communication skills — able to clearly explain research rationale and findings to technical and non-technical audiences.

Ability to thrive in a fast-paced, collaborative environment with minimal supervision.

(Preferred) Experience conducting usability testing on

mobile devices, wearables, and health-related applications.

(Preferred) Familiarity with FDA human factors guidance for medical device usability validation.

Work Environment

Hybrid role:

Onsite Tuesday–Friday, remote on Fridays.

Part of a collaborative UX Research team reporting to the Digital Health UX Lead.

Three-round interview process including an

onsite presentation round

(case prompt and showcase).

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