Principal Data Scientist I

AI in this role

ragfine-tuning

Principal Data Scientist I

Are you looking to develop your Data Scientist career?

Would you like to be part of a team that innovates using technology?

Responsibilities

Acting as a leader for analytic project and result sharing
Leading code reviews, acting as a final approver of models before reaching customers
Evaluating and creating new frameworks and defining methodologies and governance
Managing and leading small-to-medium sized teams, directly or indirectly
Setting a high-bar for model development

Requirements

Large language models (prompting, fine-tuning, adaptation), LLM
Advanced retrieval-augmented generation (hybrid search, ranking optimization), RAG
Embedding strategies and semantic search systems
Knowledge graph integration and graph-enhanced intelligence
Agentic AI architecture, multi-step reasoning, autonomous agent orchestration, and long-running agent design with feedback loops, GenAI
Evaluation science (offline metrics, human-in-the-loop systems)
Cost-performance optimization
AI observability and monitoring in production
Data governance and compliance-aware system design
Have excellent communication skills and the ability to convey information clearly to senior stakeholders
Be a natural problem-solver and able to take a lead in collaborating to resolve issues
Have experience in mentoring or training others, and acting as a subject matter expert to guide colleagues
Have some management experience, including leading a team indirectly or directly
Have significant experience in a Data Scientist role
Have experience in leading complex projects and customer relationships



U.S. National Base Pay Range: $118,300 - $219,800. Geographic differentials may apply in some locations to better reflect local market rates.



This job is eligible for an annual incentive bonus.







We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits. Click here to access benefits specific to your location.

We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact 1-855-833-5120.

Criminals may pose as recruiters asking for money or personal information. We never request money or banking details from job applicants. Learn more about spotting and avoiding scams here.

Please read our Candidate Privacy Policy.

We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law.

USA Job Seekers:

EEO Know Your Rights.

How we rate this

Principal Data Scientist I at RELX rates 93 out of 100 for how much of the daily work is AI. That makes it Builds AI (AI Level 4 of 4). The level is about AI in the job, not seniority.

Classification

Builds AI. The job is building AI systems.

●●●● Builds AI80 to 100
●●●○ Works on AI60 to 79
●●○○ Uses AI40 to 59
●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Open the description and count.

Prepare for this job

A free preview built only from this posting: what it asks for, what you could be asked in an interview, and how to adjust your resume.

Skills and AI tools this role asks for

RAGFine Tuning

Questions you could be asked

How would you design a retrieval step so the model answers from real data instead of guessing?
Walk me through fine-tuning a model: what data did you use, and how did you check the result?
How would you decide a model or AI system is ready to ship?
Tell me about a time a model underperformed in production. How did you find out, and what did you change?

Adapt your resume

List these exact terms on your resume: RAG and Fine Tuning. An applicant tracking system matches the wording, not the idea.
Attach one line of real, concrete experience to at least one of them — a tool named with nothing behind it rarely survives a human read.
Lead with what you built, trained or shipped — this role is judged on the AI system itself, not the tools around it.

Want an expert to read your CV for this job?

Free. Send your CV and the role you want next. We reply by email within 2 to 4 business days.

Get a free CV review

Get new data scientist jobs (Builds AI ●●●●) by email

One email a week with the new data scientist jobs (Builds AI ●●●●), each rated for how much AI is in the work. No recruiter spam, unsubscribe in one click.

Also alert me for new jobs at RELX

Free. One email a week. Unsubscribe in one click.