PayPal · 5 hours ago
Research Scientist
San Jose, CA
Full-time
Hybrid
Mid, Senior Level
$138K/yr - $236K/yr
3+ years expPayPal is a global leader in commerce, providing innovative payment solutions that empower consumers and businesses. The Research Scientist will design, develop, and implement large language models to address complex business challenges while collaborating with various teams to enhance PayPal's AI capabilities.
E-Commerce PlatformsFinTechMobile PaymentsTransaction Processing
Responsibilities
Develop and optimize machine learning models for various applications
Preprocess and analyze large datasets to extract meaningful insights
Deploy ML solutions into production environments using appropriate tools and frameworks
Collaborate with cross-functional teams to integrate ML models into products and services
Monitor and evaluate the performance of deployed models
Research and develop large-scale foundation models, including continuous pre-training, supervised fine-tuning, and alignment techniques
Design novel architectures and training methodologies for domain-specific language models in financial services
Build scalable ML pipelines for foundation model training, evaluation, and deployment at enterprise scale
Conduct rigorous experimentation and benchmarking to ensure model quality, safety, and performance
Deploy foundation models into production environments to drive business insights and enhance customer experiences
Collaborate with cross-functional teams to identify high-impact use cases and translate research into practical solutions
Stay current with latest developments in LLM and LLM-Agent research and contribute to the broader AI/ML community through publications and open-source contributions
Mentor junior researchers and contribute to technical strategy for foundation model initiatives
Qualification
Required
3+ years relevant experience and a Bachelor's degree OR Any equivalent combination of education and experience
Experience with ML frameworks like TensorFlow, PyTorch, or scikit-learn
Familiarity with cloud platforms (AWS, Azure, GCP) and tools for data processing and model deployment
Several years of experience in designing, implementing, and deploying machine learning models
Preferred
PhD in Computer Science, Machine Learning, AI, or related field with focus on large language models and LLM Agent
1-3+ years of hands-on experience training and deploying large-scale language models (7B+ parameters)
Deep expertise in transformer architectures, attention mechanisms, and modern training techniques
Experience with distributed training frameworks (PyTorch, JAX, DeepSpeed, etc.)
Strong background in NLP, deep learning, and statistical machine learning
Proven track record of research publications in top-tier venues (NeurIPS, ICML, ACL, etc.)
Benefits
Flexible work environment
Employee shares options
Health and life insurance
Company
PayPal
PayPal is a financial service company that provides online payment solutions to its users worldwide.
10001+ employees
H1B Sponsorship
PayPal has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1144)
2024 (917)
2023 (775)
2022 (921)
2021 (1051)
2020 (1049)
Funding
Current Stage
Public CompanyTotal Funding
$12.17BKey Investors
Kohlberg Kravis RobertsBlueRun Ventures
2025-11-17Post Ipo Debt· $6.95B
2023-06-07Post Ipo Debt· $5B
2015-07-20IPO
Leadership Team
Simon Bladon
CEO, UK
chaloem khompitoon
President & CEO
Recent News
2025-12-31
The European Financial Review
2025-12-31
Company data provided by crunchbase