Principal Data Scientist I

LexisNexis; Alton; On-site; GBP 70,000 - 100,000; Full time

Job summary

A global information analytics provider is seeking a Principal Data Scientist to drive innovations in Agentic Systems and LLMs. The role requires expertise in context engineering and collaboration with cross-functional teams. Join a culture of innovation with flexible working hours and generous benefits including health screening, holiday allowance, and professional development.

Benefits

Generous holiday allowance

Health screening

Private medical benefits

Wellbeing programs

Life assurance

Pension scheme

Employee discounts

Learning and development resources

Qualifications

• Advanced degree in relevant field is mandatory.
• Strong experience in applied AI or LLMs necessary.
• Proven ability in context engineering and LLM fine-tuning required.

Responsibilities

• Design and improve agentic systems.
• Develop context engineering strategies.
• Support and mentor team members.

Skills

Applied AI experience

LLM fine-tuning

Context engineering

Proficiency in Python

Deep learning frameworks

Problem-solving skills

Collaboration skills

Education

PhD or Master's in AI, Computer Science, Mathematics

Tools

PyTorch

Job description

Principal Data Scientist I

Are you passionate about driving the successful delivery of Data Platform and Software Innovations?
Do you thrive in creating a collaborative and customer-focused work environment?

About the Team:
LexisNexis Intellectual Property, which serves customers in more than 150 countries with 11,300 employees worldwide, is part of RELX, a global provider of information-based analytics and decision tools for professional and business customers.

About the Role:
LexisNexis Intellectual Property Solutions is seeking a Principal Data Scientist specialising in Agentic Systems, with deep expertise in efficient context engineering, fine-tuning large language models (LLMs), and multi-agent workflows. This hands-on role focuses on pushing the boundaries of how intelligent systems plan, reason, and act in real-world intellectual property (IP) applications.

As part of our dynamic Data Science and AI Engineering community, you'll have the opportunity to rotate across diverse problem domains, gaining broad expertise while delivering impact. You'll partner closely with product managers and commercial teams to understand the workflows of IP professionals, and collaborate with engineers to prototype, evaluate, and optimise intelligent agents that drive measurable customer value.

Key Responsibilities

• Designing and improving agentic systems that break down complex tasks into actionable steps.
• Developing innovative context engineering strategies (e.g., retrieval-augmented generation, dynamic context construction, memory optimisation).
• Select, benchmark, and host LLMs on Amazon SageMaker or EKS, comparing and optimising models to ensure agentic systems are fast, accurate, and cost-effective.
• Select, fine-tune, and adapt LLMs to meet specific objectives.
• Enhancing evaluation frameworks to measure performance, efficiency, and success.
• Prioritising and managing improvements to core intelligence using methods like reinforcement learning and self-learning agents.
• Collaborating with engineering and product teams to deliver scalable solutions.
• Supporting and mentoring team members, fostering a culture of inclusion, learning, and innovation.

Requirements

• Advanced degree (PhD, Master's, or equivalent experience) in AI, Computer Science, Mathematics, or a related field.
• Strong experience in applied AI or LLMs in a commercial or research setting.
• Strong knowledge of context engineering, LLM fine-tuning, and evaluation of non-deterministic systems.
• Proficiency in Python and deep learning frameworks (e.g., PyTorch).
• Excellent problem-solving, communication, and collaboration skills.
• Experience working in agile, cross-functional teams.

Why Join Us?

Join our team and contribute to a culture of innovation, collaboration, and excellence. If you are ready to advance your career and make a significant impact, we encourage you to apply.

Work in a way that works for you

We promote a healthy work/life balance across the organization. We offer an appealing working prospect for our people. With numerous wellbeing initiatives, shared parental leave, study assistance and sabbaticals, we will help you meet your immediate responsibilities and your long-term goals.

• Working flexible hours - flexing the times when you work in the day to help you fit everything in and work when you are the most productive.

Working for you

We know that your well-being and happiness are key to a long and successful career. These are some of the benefits we are delighted to offer:

• Generous holiday allowance with the option to buy additional days.
• Health screening, eye care vouchers and private medical benefits
• Wellbeing programs
• Life assurance
• Access to a competitive contributory pension scheme
• Save As You Earn share option scheme.
• Travel Season ticket loan.
• Electric Vehicle Scheme
• Optional Dental Insurance
• Maternity, paternity, and shared parental leave
• Employee Assistance Programme
• Access to emergency care for both the elderly and children
• RECARES days, giving you time to support the charities and causes that matter to you.
• Access to employee resource groups with dedicated time to volunteer.
• Access to extensive learning and development resources
• Access to the employee discounts scheme via Perks at Work

About Our Business

At LexisNexis Intellectual Property (LNIP), we believe that whenever a person works on a patent and understands the future trajectory of a specific technology, that person has the potential to fundamentally change how society operates. We are proud to directly support and serve these innovators in their endeavours to better humankind. We enable innovators to accomplish more by helping them make informed decisions, be more productive, comply with regulations, and ultimately achieve superior results. By harnessing the latest advances in machine learning combined with expert analysis, LexisNexis Intellectual Property is disrupting how actionable insight is extracted from patent data. Information can now be accessed with efficiency, accuracy and at a speed that is just not possible by traditional methods. Our overall success is measured by how well we deliver these results.

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