About this opportunity
RXinsider LTD. lists this Immunoassay Development Scientist - Analyte Detection opportunity in fremont, California. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Become your most extraordinary self! Our team is intensely proud to be a major provider of services and products to the drug discovery research industry. Join Eurofins DiscoverX Products, LLC part of the Eurofins Discovery group of companies serving global clients in the Pharma and Biotech industries. Work alongside industry experts and collaborate with team members to directly and positively impact human health worldwide!
We have a philosophy to support work life balance, career progression opportunities and offer many benefits such as formal mentoring programs, tuition reimbursement, extensive career training programs, competitive health benefits, paid time off and 10 annual paid holidays*.
Job Description
We are seeking for hands‑on immunoassay developers for a new Analyte Detection Business Unit. If you have designed assays from scratch, selected and screened reagent pairs, and solved real development problems across ELISA, MSD, TR‑FRET, AlphaLISA, or related formats, we want to hear from you. Here’s what you’ll do:
Laboratory Execution & Technical Support
Design and execute bioconjugation strategies for labeling antibodies and other proteins with donor/acceptor fluorophores (NHS‑ester, maleimide, and related chemistries); optimize reaction conditions, purification, and labeling efficiency from first principles
Develop homogeneous immunoassays (TR‑FRET, HTRF, AlphaLISA, MSD, and/or ELISA) for analyte detection; own the full development cycle from reagent selection and antibody pairing through format optimization and matrix validation
Lead independent antibody screening campaigns to identify optimal capture/detection pairs; apply structured DOE approaches to optimize reagent concentrations, buffer formulations, and assay window
Conduct routine assay validation experiments, including precision, accuracy, linearity, and range determination
Prepare biological samples, reagents, and buffers according to SOPs
Operate and maintain laboratory equipment, including plate readers, liquid handlers, and analytical instruments
Independently diagnose and resolve assay performance failures; apply root‑cause analysis to reagent, buffer, and instrument variables and propose data‑driven corrective actions
Support antibody screening and characterization activities
Assist with benchmarking studies comparing assay performance to competitor products
Data Management & Documentation
Maintain detailed, accurate, and organized laboratory notebooks documenting all experimental procedures and observations
Analyze experimental data using GraphPad Prism, Excel, or similar software
Generate clear data summaries, graphs, and tables for internal reports and presentations
Contribute to technical reports and validation documents
Assist in drafting sections of SOPs and user manual protocols
Ensure all documentation meets company quality standards and regulatory requirements
Collaboration & Learning
Work collaboratively with Senior Scientist and other team members to support project timelines
Participate in team meetings and provide updates on experimental progress
Communicate experimental results and technical challenges effectively to the supervisor
Actively seek learning opportunities to develop technical skills in bioconjugation and immunoassay development
Support cross‑functional activities with Manufacturing, Quality, and Marketing teams as needed
Participate in training programs to enhance scientific and professional development
Compliance & Safety
Adhere to all site employee health and safety (EHS) and IT security requirements
Demonstrate and promote the company vision and values
Maintain regular attendance and punctuality
Conduct all activities in a safe and efficient manner
Perform other duties as assigned
Meet project deadlines and adjust work hours as needed to support team objectives
Qualifications
Here is who and what we are are looking for in the ideal candidate:
Education/Experience (BMQ)
BS/MS in chemistry, biochemistry, biology, or related discipline with 3–7 years of hands‑on industrial experience developing immunoassays from scratch (ELISA, MSD, TR‑FRET/HTRF, AlphaLISA, or equivalent); experience must include reagent selection, antibody screening, and quantitative assay optimization — not solely protocol execution
Demonstrated experience independently developing and validating immunoassays — including reagent pair selection, signal‑to‑noise optimization, and characterization studies — with a verifiable track record of assays taken from concept to validated format
Solid understanding of antibody‑antigen binding kinetics, epitope considerations for sandwich vs. competitive immunoassay design, and the impact of protein biochemistry on assay performance
Familiarity with aseptic technique and cell culture is a plus
Ability and/or Skills (BMQ)
Strong laboratory skills with attention to detail and accuracy
Basic proficiency in data analysis using Excel; familiarity with GraphPad Prism or similar software is a plus
Good organizational and time management skills with the ability to balance multiple tasks
Ability to design experiments from first principles, generate and test hypotheses, and translate results into actionable next steps — not limited to following pre‑written protocols
Strong work ethic with demonstrated reliability and accountability
Eagerness to learn new techniques and acquire new scientific knowledge
Good verbal and written communication skills
Team player with positive attitude and willingness to collaborate
Ability to work independently on assigned tasks while knowing when to seek guidance
Comfortable working in a fast‑paced laboratory environment with defined deadlines
Additional Preferences
Experience developing assays in two or more immunoassay platforms (e.g., ELISA, MSD/ECL, TR‑FRET/HTRF, AlphaLISA, Luminex); cross‑platform familiarity is a strong differentiator
Hands‑on bioconjugation experience beyond kit use: NHS‑ester, maleimide, aldehyde, or click‑chemistry conjugation of small molecules, haptens, or fluorophores to antibodies or proteins, including optimization of degree of labeling (DOL) and purification
Hands‑on experience with multi‑channel pipettes, automated liquid handlers, and plate readers
Familiarity with time‑resolved fluorescence or FRET‑based detection principles (TR‑FRET/HTRF, LANCE, or AlphaLISA); experience with plate reader instrumentation for fluorescence or luminescence readouts (e.g., PHERAstar, EnVision, or equivalent)
Academic or industrial research experience in drug discovery, diagnostics, or related areas
Experience maintaining detailed laboratory notebooks and documentation
Applied experience with Design of Experiments (DOE) for reagent concentration and buffer optimization, not merely theoretical familiarity
Experience presenting research findings in laboratory meetings or scientific conferences
Demonstrated problem‑solving skills and scientific curiosity
Proficiency with Microsoft Office Suite (Word, Excel, PowerPoint)
Additional Information
Salary Range: $95,000 - $125,000/yr.
Excellent full time benefits including comprehensive medical coverage, dental, and vision options
Life and disability insurance
401(k) with company match
Paid vacation and holidays
Eurofins USA Discovery Services is a Disabled and Veteran Equal Employment Opportunity employer.
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Worksite address
fremont, CA, 94537, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.