Postdoctoral Fellow in AI/ML Applications for Vaccine Research & Development

Use Your Power for Purpose
At Pfizer, our purpose is to deliver breakthroughs that transform patients' lives. Central to this mission is our Research and Development team, which strives to convert advanced science and cutting-edge technologies into impactful therapies and vaccines. Whether you are engaged in discovery sciences, ensuring drug safety and efficacy, or supporting clinical trials, your role is crucial. You will leverage innovative design and process development capabilities to expedite the delivery of top-tier medicines to patients globally.
What You Will Achieve
In this role, you will:

• Develop advanced AI and machine learning models, including transformer architectures and graph neural networks, to represent molecular features and predict immunogenicity of pneumococcal conjugate vaccines using preclinical and clinical data.
• Apply transfer learning to translate predictive models from preclinical to clinical domains and utilize interpretation frameworks (such as SHAP) to identify key molecular motifs for rational vaccine design.
• Conduct meta-analyses of large-scale immunogenicity datasets to characterize quantitative relationships between vaccine physical parameters and immunogenicity outcomes.
• Harmonize and curate preclinical and clinical datasets to support robust statistical and machine learning analyses.
• Engage in active collaboration with multidisciplinary teams, encompassing experts in data science, preclinical analysis, and clinical vaccine research, to advance pneumococcal conjugate vaccines development.
• Publish impactful scientific findings while safeguarding confidential data, ensuring clear, transparent reporting of methods and results to facilitate reproducibility and recognition in peer-reviewed journals and conferences.

Here is What You Need ( Minimum Requirements )

• Ph.D. in Computational Biology, Bioinformatics, Computer Science, Immunology, or a related field. Publication
• Successful record of scientific accomplishments evidenced by scientific publications and/or presentations with at least one first-author publication in a peer-reviewed journal.
• No more than 2 years of post-degree experience.
• Willingness to make a minimum 2-year commitment.
• Demonstrated expertise in machine learning and deep learning, with hands-on experience in developing and validating predictive models for biological or biomedical data.
• Proficiency in Python and relevant AI Machine Learning frameworks (e.g., PyTorch, TensorFlow, scikit-learn). Experience with statistical modeling, including regression analysis and mixed-effects models.
• Solid understanding of immunology, especially vaccine immunogenicity and conjugate vaccine design.
• Strong data management and curation skills, including harmonization of heterogeneous biological datasets.
• Excellent scientific communication skills, with a track record of peer-reviewed publications or presentations. Ability to work across computational and wet‑lab teams, distill complex results for diverse stakeholders.

Bonus Points If You Have ( Preferred Requirements )

• Prior experience applying graph neural networks, transformer models, or cross-attention mechanisms to biological sequence or molecular structure data.
• Familiarity with glycan-focused modeling and representation, including encoding of polysaccharide and protein carrier features.
• Experience in translational research bridging preclinical and clinical datasets, especially in vaccine development.
• Knowledge of SHAP or similar model interpretation frameworks for feature attribution in complex models.
• Hands-on experience with ensemble modeling and transfer learning in biomedical contexts.
• Collaborative experience with experimental biologists and vaccine R\\&D teams.
• Familiarity with regulatory and translational aspects of vaccine development.

Additional Information
Relocation support available
Work Location Assignment: Hybrid
Last day to apply: Sunday January 18th, 2026
The annual base salary for this position ranges from $62,700.00 to $104,500.00. In addition, this position is eligible for participation in Pfizer's Global Performance Plan with a bonus target of 7.5% of the base salary. We offer comprehensive and generous benefits and programs to help our colleagues lead healthy lives and to support each of life's moments. Benefits offered include a 401(k) plan with Pfizer Matching Contributions and an additional Pfizer Retirement Savings Contribution, paid vacation, holiday and personal days, paid caregiver/parental and medical leave, and health benefits to include medical, prescription drug, dental and vision coverage. Learn more at Pfizer Candidate Site - U.S. Benefits | (uscandidates.mypfizerbenefits.com). Pfizer compensation structures and benefit packages are aligned based on the location of hire. The United States salary range provided does not apply to Tampa, FL or any location outside of the United States.
Relocation assistance may be available based on business needs and/or eligibility.
Sunshine Act
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EEO & Employment Eligibility
Pfizer is committed to equal opportunity in the terms and conditions of employment for all employees and job applicants without regard to race, color, religion, sex, sexual orientation, age, gender identity or gender expression, national origin, disability or veteran status. Pfizer also complies with all applicable national, state and local laws governing nondiscrimination in employment as well as work authorization and employment eligibility verification requirements of the Immigration and Nationality Act and IRCA. Pfizer is an E-Verify employer. This position requires permanent work authorization in the United States.
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Research and Development