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Senior Scientist - Assay Development

Job in Stevenage, Hertfordshire, SG1, England, UK
Listing for: Talentmark
Full Time position
Listed on 2026-08-13
Job specializations:
  • Research/Development
    Research Scientist, Biotech Research
Salary/Wage Range or Industry Benchmark: 80000 GBP Yearly GBP 80000.00 YEAR
Job Description & How to Apply Below
Senior Scientist – Assay Development

On-site| London/Stevenage | Permanent

Talentmark is working with an innovative, early-stage diagnostics company developing next-generation at-home testing technology.

We are looking for a Senior Scientist – Assay Development to take ownership of assay development and help shape the company's scientific direction. This is a hands-on leadership role, taking assays from initial design and optimisation through to validation and commercialisation.

Key Responsibilities
Lead the design and development of quantitative immunoassays.
Drive optimisation of sensitivity, precision, reproducibility and stability.
Design and execute assay development and validation studies.
Maintain robust documentation aligned with regulatory and technical-file requirements.
Establish high standards for data integrity, experimental rigour and statistical analysis.
Manage external scientific collaborators and advisors.

Your Background:

You are an experienced assay development scientist with a strong track record of taking assays from concept through to validation.

Essential Experience
PhD in Biochemistry, Analytical Chemistry, Bioengineering, Biomedical Science or a related discipline.
Industry experience in diagnostics or assay development (5 yrs+)
Strong hands-on expertise in immunoassay development, particularly ELISA, with a good working knowledge of enzymatic assays.
Experience translating laboratory immunoassays into point-of-care, lateral-flow, biosensor or microfluidic cartridge formats.

Experience with low-concentration analyte measurement
Proven experience developing diagnostic assays through validation and commercial release.
Practical experience working with human biological samples (blood, saliva or urine).

Desirable Experience
Experience developing steroid or peptide hormone assays.
Familiarity with freeze-drying / lyophilisation for reagent stabilisation.
Knowledge IVD technical-file preparation for CE, UKCA or FDA submissions.
Experience building or leading a laboratory/science team.
Experience working with aptamer technology.

What's on Offer
The opportunity to take diagnostic assays from concept through validation and towards market.
A senior, hands-on role within an ambitious early-stage company.
Competitive salary and share equity options scheme. Apply:

It is essential that applicants hold entitlement to work in the UK. Please quote job reference (Apply online only) in all correspondence
Position Requirements
10+ Years work experience
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