Sr. Data Scientist (Hybrid)

Job Responsibilities

Develop and implement LLM-based applications tailored for in-house legal

Fine-tune and deploy large language models to enhance their performance on legal text processing tasks

Evaluate and help maintain our data assets and training/evaluation data sets

Design and build pipelines for preprocessing, annotating, and managing legal document datasets

Collaborate with legal experts to understand requirements and ensure models meet domain-specific needs

Conduct experiments and evaluate model performance to drive continuous improvements

Interface with other technical personnel or team members to finalize requirements

Work closely with other development team members to understand moderately complex product requirements and translate them into software designs

Successfully implement development processes, coding best practices, and code reviews for production environments

Requirements

Formal training in machine learning: dimensionality reduction, clustering, embeddings, and sequence classification algorithms

Experience with deep learning frameworks such as PyTorch, Tensorflow and Hugging Face Transformers

Practical experience in Natural Language Processing methods and libraries such as spaCy, word2vec, TensorFlow, Keras, PyTorch, Flair, BERT

Practical experience with large language models, prompt engineering, fine-tuning and benchmarking, using frameworks such as LangChain and LlamaIndex

Strong Python background

Knowledge of AWS, GCP, Azure, or other cloud platform

Understanding of data modeling principles and complex data models

Proficiency with relational and NoSQL databases as well as vector stores (e.g., Postgres, Elasticsearch/OpenSearch, ChromaDB)

Knowledge of Scala, Spark, Ray, or other distributed computing systems highly preferred

Knowledge of API development, containerization, and machine learning deployment highly preferred

Experience with ML Ops/AI Ops highly preferred

Salary and Other Compensation

Applications will be accepted until Oct 25, 2025.

The annual salary for this position is between $75,000 - $140,000 depending on experience and other qualifications of the successful candidate.

This position is also eligible for Cognizant's discretionary annual incentive program, based on performance and subject to the terms of Cognizant's applicable plans.

Benefits: Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:

Medical/Dental/Vision/Life Insurance

Paid holidays plus Paid Time Off

401(k) plan and contributions

Long-term/Short-term Disability

Paid Parental Leave

Employee Stock Purchase Plan

Disclaimer: The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.

What We Offer

The chance to work with impact. Here, you're empowered to bring your biggest thinking to help our company and clients improve everyday life.

Ownership over your career. Stay at the top of your game through our award-winning learning and development ecosystem. And when your ambitions change or we offer new opportunities, we help you pivot by providing reskilling, on-the-job learning and guidance to find new roles that might be a better fit.

The opportunity to thrive on a high caliber team with heart. We celebrate each other's experiences and perspectives and promote a sense of belonging through our affinity groups and diversity and inclusion initiatives.

A comprehensive total rewards package, including a competitive salary and pension plan with matching contributions.

Flexible health and financial benefits to support you and your eligible dependents from day one.

True work-life balance. Be at your best through paid time off, flexible work arrangements, volunteering opportunities, social events, and so much more.

About Us

Cognizant is one of the world's leading professional services companies, transforming clients' business, operating, and technology models for the digital era. Our unique industry-based, consultative approach helps clients envision, build, and run more innovative and efficient businesses. Headquartered in the U.S., Cognizant (a member of the NASDAQ-100 and one of Forbes World's Best Employers 2024) is consistently listed among the most admired companies in the world. Learn how Cognizant helps clients lead with digital.

Other Employment-Related Information

Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, provincial or local laws.

If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email CareersNA2@cognizant.com with your request and contact information.

Language requirements vary depending on roles, but we ask that all candidates have basic English proficiency for company-wide communications purposes. For roles based in Quebec, professional English proficiency is required, as you'll deliver services to and collaborate with stakeholders outside the province who may not speak French.