Senior Data Scientist

Location: Woodland, California, US
Recruiter: ZipRecruiter
Date posted: Sunday, November 16, 2025

 

Job Description:
Job Summary

As a Senior Data Scientist, you will leverage cutting-edge technologies and methodologies to deliver data-driven insights and solutions for complex customer needs. You will work on end-to-end solutions, including building Proof of Concepts (POCs), professional services, and integrating third-party technologies with client systems. This role is pivotal to ensuring the successful implementation of data science-driven products and capabilities, with a key focus on AI, machine learning, and Natural Language Processing (NLP). You will collaborate closely with cross-functional teams, delivering innovative solutions to customers in highly dynamic, data-intensive environments.

Role & Responsibilities

• Lead and execute complex customer engagements, utilizing specialized expertise in AI, Machine Learning, and NLP, including building POCs, integrations, and deployments with customer workflows.
• Apply a combination of technical, product, and data science expertise to co-create solutions that address specific customer needs, including ideation, clarification, technical design, and documentation.
• Lead detailed customer presentations for complex technical propositions, focusing on explaining advanced data science concepts and AI/ML solutions in an accessible way.
• Manage relationships with internal and external stakeholders, ensuring that project and customer-specific technical requirements are captured, refined, and translated into actionable solutions.
• Oversee and contribute to the development of Proof of Concepts, ensuring integration with customer workflows and systems.
• Lead the technical design and implementation of AI and machine learning solutions that integrate with existing client infrastructure.
• Drive the adoption of advanced data science and AI technologies to deliver high-value solutions.
• Develop and present strategies for scaling AI solutions, utilizing cloud platforms (Azure, AWS, GCP) for production-ready deployments.
• Lead and mentor junior team members, fostering a collaborative environment for continuous learning and technical growth.

Qualifications and Experience Required

• 10+ years of experiencein data science or a related field, with a focus on AI, machine learning, and NLP, preferably in a senior technical or leadership role.
• Bachelor's or Master's degreein Computer Science, Engineering, Data Science, or related field. A Ph.D. in a relevant field is a plus.
• Expertise in Natural Language Processing (NLP)with a deep understanding of the latest NLP stack, including transformer-based architectures such as BERT, GPT, T5, and newer models like GPT-4, PaLM, and other state-of-the-art large language models (LLMs) that are driving the evolution of NLP applications.
• Extensive experiencewith advanced machine learning and deep learning frameworks such as TensorFlow 2.x, PyTorch, Hugging Face, and JAX for NLP and other advanced AI tasks.
• Deep knowledge of cloud services (AWS, GCP, Azure)and their use in data science workflows, particularly for deploying machine learning models at scale.
• Expertise in Python, with advanced knowledge of modern data science and machine learning libraries such asPandas, NumPy, SciPy, scikit-learn, spaCy, as well as cutting-edge NLP frameworks likeHugging Face Transformers, Datasets, andNLTKfor efficient model training, fine-tuning, and data preprocessing.
• Strong programming skills inPython, R, and SQL, with advanced proficiency in handling large-scale data usingdistributed data systemslikeApache Spark,cloud-native NoSQL databasessuch asMongoDB,Cassandra, andDynamoDB, as well as search engines likeElasticsearchandvector databasesfor semantic search (e.g.,Pinecone,Weaviate).
• Hands-on experiencewith data ingestion, data wrangling, and data pipeline orchestration using tools likeApache Kafka,Apache Spark,Airflow, and distributed computing frameworks likeDaskandRay.
• Experience with advanced data science methodologies, includingensemble learning,deep reinforcement learning,transfer learning, and deployinglarge pre-trained modelsfor real-time inference and production.
• Ability to design, prototype, and deployNLP modelsfor a range of applications, from information retrieval to sentiment analysis, chatbots, and question answering systems.
• Demonstrated success in delivering solutions in complex, fast-paced environments with a focus on customer satisfaction and technical excellence.
• Strongcommunication skills, with the ability to explain complex technical concepts to both technical and non-technical stakeholders.
• Proven experience incustomer-facing rolesis highly valued, particularly in the enterprise tech or financial sectors.
• Familiarity withAI-powered product developmentin industries such as finance, healthcare, or e-commerce.
• Experience withdata visualization toolslikeTableau,Power BI, orPlotlyto present data science findings effectively.
• Knowledge ofregulatory requirements in finance, including experience working with financial data feeds and APIs.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce. You will be part of a collaborative and creative culture where we encourage new ideas and are committed to sustainability across our global business. You will experience the critical role we have in helping to re-engineer the financial ecosystem to support and drive sustainable economic growth. Together, we are aiming to achieve this growth by accelerating the just transition to net zero, enabling growth of the green economy and creating inclusive economic opportunity.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone's race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it's used for, and how it's obtained, your rights and how to contact us as a data subject.

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

 

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