Senior Scientist, R&D - Assay Development

Hims & Hers is the leading health and wellness platform, on a mission to help the world feel great through the power of better health. We are redefining healthcare by putting the customer first and delivering access to care that is affordable, accessible, and personal, from diagnosis to treatment to delivery. No two people are the same, so we provide access to personalized care designed for results.

By normalizing health & wellness challenges and innovating on their solutions, we’re making better health outcomes easier to achieve.

Hims & Hers is a public company, traded on the NYSE under the ticker symbol “HIMS.” To learn more about the brand and offerings, you can visit  and  For information on the company’s outstanding benefits, culture, and its talent-first flexible/remote work approach, see below and visit

Hims & Hers is seeking a Senior Scientist, R&D to join our growing laboratory organization. This individual contributor will report to the Director of R&D and work closely to develop and validate diagnostic assays supporting both traditional and at-home testing programs, and support assay implementation into clinical operations. The ideal candidate is bench-strong, with hands‑on experience across the full assay development lifecycle - from feasibility and optimization through verification and validation;

and thrives in a fast‑moving, early‑stage environment

This is an on-site laboratory role based in Central New Jersey.

Assay Development and Validation

• Design and execute immunoassay development, optimization, and verification studies including ELISA, chemiluminescent, and multiplex formats

• Perform method validation experiments including precision, accuracy, linearity, interference, and stability testing per established protocols

• Apply Design of Experiments (DOE) and statistical methodologies to assay optimization and troubleshooting

• Support LC-MS/MS method development and validation for clinical chemistry and hormone analytes

• Evaluate performance characteristics of capillary versus venous specimens, investigate interference, and develop strategies to extend sample stability

• Develop and revise SOPs to support consistent, reproducible laboratory operations

• Prepare validation summaries, protocols, and technical reports in compliance with quality and regulatory standards

Laboratory Execution

• Perform hands‑on laboratory testing using specimens collected via at‑home devices such as Tasso and Your Bio Health, including whole blood, plasma, serum, and other biological matrices

• Operate LC-MS/MS instrumentation (SCIEX 4500MD or equivalent) including sample preparation, method validation, and data review

• Support testing on automated chemistry and hematology platforms including Roche Cobas Pro and Sysmex systems, including CBC and whole blood analyte workflows

• Support liquid handling automation workflows for sample processing and high‑throughput laboratory operations

• Troubleshoot assay performance issues across immunoassay, clinical chemistry, mass spectrometry, and molecular diagnostic platforms

Data Analysis

• Analyze experimental data and perform statistical evaluation of assay performance including precision, bias, and total allowable error modeling

• Prepare figures, tables, and technical summaries for internal review and scientific communication

• Contribute to peer‑reviewed publications and scientific conference presentations

Quality and Regulatory Collaboration

• Partner with the Quality team to ensure study designs and documentation meet CAP, CLIA, and applicable regulatory requirements

• Support investigation and resolution of sample rejection issues to improve overall laboratory quality metrics

• Support laboratory inspection readiness and audit preparation activities

• Collaborate with Clinical Laboratory Operations during assay transfer and implementation

• PhD in Clinical Chemistry, Biochemistry, Analytical Chemistry, Molecular Biology, or related field with 4+ years; OR Master’s degree with 7+ years; OR Bachelor’s degree with 10+ years of relevant bench experience in a diagnostic or clinical laboratory setting

• Demonstrated hands‑on experience in immunoassay development including singleplex…