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  3. Senior Scientist, Antibody Characterization
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Role description

Senior Scientist, Antibody Characterization

Xaira Therapeutics logoXaira Therapeutics
WorkplaceOn-site
SenioritySenior
Salary$136,000–$170,000
LocationSouth San Francisco, CA
Posted10/7/2026

Company info

Xaira Therapeutics logo

Xaira Therapeutics

an integrated biotechnology company driving advances in AI to transform how we treat disease.

Xaira Therapeutics is an integrated biotechnology company driving advances in artificial intelligence to learn the language of life and transform how we treat disease. We seek to rethink the drug discovery and development process from end-to-end by bringing together leading talent across three core areas: machine learning research to better understand biology, expansive data generation to power new models, and robust therapeutic product development to treat disease. Xaira is headquartered in the San Francisco Bay Area. Please be advised that we will never ask for personal information or any financial commitment from a candidate as a pre-employment requirement. All legitimate Xaira communication regarding our recruitment processes comes from email addresses ending with @xaira.com or through recognized professional networks, such as LinkedIn. To avoid any potential fraudulent activity, please make sure to apply only through Xaira's official Careers page: https://www.xaira.com/work-with-

Private companySeries AAI-product
Research

About Xaira Therapeutics

Xaira is an innovative biotech startup focused on leveraging AI to transform drug discovery and development. The company is leading the development of generative AI models to design protein and antibody therapeutics, enabling the creation of medicines against historically hard-to-drug molecular targets. It is also developing foundation models for biology and disease to enable better target elucidation and patient stratification. Collectively, these technologies aim to continually enable the identification of novel therapies and to improve success in drug development. Xaira is headquartered in the San Francisco Bay Area, Seattle, and London.

About the Role

As a part of the Protein Analytics team, you will play a crucial role in discovering and developing novel biotherapeutics. The ideal candidate will have extensive experience characterization of monoclonal and bi/multispecific antibodies within a biotherapeutics discovery setting, coupled with a proactive and can-do attitude. This is a hands-on, lab-based position. 

Responsibilities:

  • Support the discovery and development of therapeutic molecules through hands-on laboratory work.
  • Characterize antibodies in high-throughput manner via biolayer interferometry (BLI) and surface plasmon resonance (SPR) based biosensor platforms to determine Yes/No binding, Kinetics and Affinity information.
  • Screen antibodies and other antibody-like molecules for off-target binding assessment via BVP ELISA or other poly-specificity/poly-reactivity assays.
  • Perform early developability assessment on antibody panels using SPR, DLS, DSF, SEC and ELISA platforms.
  • Support other workflows as needed, including fluorescence based binding assays and assay automation.
  • Analyze experimental data, curate results and reports, and present findings to cross-functional teams.
  • Maintain experimental records in an ELN.
  • Ensure compliance with laboratory safety protocols and contribute to lab organization and operations.

Qualifications:

  • PhD degree in a relevant discipline with 5+ years of industry experience or a BS/MS degree with 10+ years of industry experience in biophysics, biochemistry, structural biology, or a related discipline
    • Candidates with fewer years of experience are also encouraged to apply, and the leveling of the role can be adjusted if needed
  • Extensive experience in antibody screening including monoclonals, bispecific, and other antibody-like molecules.
  • Extensive hands-on experience with ELISA, BLI and SPR based platforms (Carterra, Biacore).
  • Basic knowledge of protein production, purification and characterization techniques (including affinity, ion exchange, HIC, DLS, DSF and SEC).
  • Proficiency in data analysis software (e.g., GraphPad Prism) and other statistical tools.
  • Proactive attitude with a self-starter mindset.
  • Strong organizational, communication, and interpersonal skills.
  • Strong collaborative skills and interest in working in cross-functional teams and a startup environment.
  • Excellent problem-solving and troubleshooting abilities.
  • Ability to work independently with accountability and meticulous attention to detail.

Compensation
We offer a competitive compensation and benefits package, seeking to provide an open, flexible, and friendly work environment to empower employees and provide them with a platform to develop their long-term careers. A Summary of Benefits is available for all applicants. We offer a competitive package that includes base salary, bonus, and equity.  The base pay range for this position is expected to be $136,000 - $170,000 annually; however, the base pay offered may vary depending on the market, job-related knowledge, skills and capabilities, and experience.

Xaira Therapeutics an equal-opportunity employer. We believe that our strength is in our differences. Our goal to build a diverse and inclusive team began on day one, and it will never end.

TO ALL RECRUITMENT AGENCIES: Xaira Therapeutics does not accept agency resumes. Please do not forward resumes to our jobs alias or employees. Xaira Therapeutics is not responsible for any fees related to unsolicited resumes.

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Founded
2023
HQSan Francisco, United States
Size201-500 employees
IndustryBiotechnology Research
Latest fundingSeries A · Apr 23, 2024
Investors
ARCH Venture PartnersForesite Capital
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