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Senior Data Scientist II

Reads like an AI Engineer role: building products on existing AI models.

Pay
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What you’ll work on

Full posting

In this role, you will design and deliver advanced AI, NLP, and generative AI solutions that power knowledge discovery and decision support.

  • Design, build, and evaluate AI/ML, NLP, and generative AI solutions for knowledge discovery

  • Develop LLM workflows and RAG systems for search, summarization, and Q&A

  • Build retrieval, ranking, and recommendation capabilities

  • Write production-ready Python and help engineering teams deploy at scale

  • Set up evaluation and monitoring frameworks for quality and reliability

From the employer’s posting
In this role, you will design and deliver advanced AI, NLP, and generative AI solutions that power knowledge discovery and decision support. You will work with complex scientific data and apply modern machine learning and LLM-based approaches to build scalable, reliable systems with real user impact. You will also collaborate across teams to turn complex challenges into practical, production-ready solutions.
Design, build, and evaluate advanced AI/ML, NLP, and generative AI solutions for scientific and knowledge-discovery applications.
Develop LLM-powered workflows and retrieval-augmented generation (RAG) systems for search, summarization, question answering, and evidence-grounded insight generation.
Build intelligent retrieval, ranking, recommendation, and decision-support capabilities
Write production-ready Python code and partner with engineering teams to deploy solutions at scale.
Establish robust evaluation, experimentation, and monitoring frameworks to ensure quality, trust, performance, and reliability.

What you’ll bring

All qualifications

Core experience

  • Practical experience in data science, AI, machine learning, NLP, information retrieval, or a related quantitative field.
  • Expertise working with LLMs, including fine-tuning, prompt engineering, grounding strategies, and responsible AI practices.
  • Strong Python skills and solid machine learning fundamentals.
  • Experience working with large-scale text or content-rich datasets and modern AI/ML frameworks.
  • Experience with RAG, semantic, vector, or hybrid search, along with experimentation and evaluation approaches that measure user impact.
  • Familiarity with cloud platforms and modern software engineering practices.
Qualification wording
Practical experience in data science, AI, machine learning, NLP, information retrieval, or a related quantitative field.
Expertise working with LLMs, including fine-tuning, prompt engineering, grounding strategies, and responsible AI practices.
Strong Python skills and solid machine learning fundamentals.
Experience working with large-scale text or content-rich datasets and modern AI/ML frameworks.
Experience with RAG, semantic, vector, or hybrid search, along with experimentation and evaluation approaches that measure user impact.
Familiarity with cloud platforms and modern software engineering practices.

About Relx

A global leader in information and analytics, we help researchers and healthcare professionals advance science and improve health outcomes for the benefit of society.

In the employer’s words · Read in context

Apply at Relx

Posting record

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Open 5 monthsWe first saw this posting 160 days ago and it is still up. Roles open this long are often slow to fill or kept open to collect applications.

Status in our records
Live
First seen by us
Jun 6, 2026160 days ago
Recorded sightings
330
Last seen by us
Nov 13, 2026

These dates show when we found the posting. Check the employer’s website to confirm it is still accepting applications.

How this job compares

Time since we first saw it

Day 160

Up longer than most. Similar jobs usually come down between day 4 and day 77.

Well past Relx’s usual: its jobs come down by about day 24.

From 51 similar postings that came down, and 33 of Relx’s. Coming down is not always a hire.

Relx is hiring

42 open jobs

Open jobs by the week we first saw them, last 12 weeks.

  • Hiring at a steady pace
  • Takes jobs down at a usual pace
  • 10% of open jobs were reposted
Hiring record

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  • Python
Where the posting names them
- Establish robust evaluation, experimentation, and monitoring frameworks to ensure quality, trust, performance, and reliability. - Write production-ready Python code and partner with engineering teams to deploy solutions at scale. - Provide technical leadership and mentoring to support high-quality delivery and continuous improvement.
- Expertise working with LLMs, including fine-tuning, prompt engineering, grounding strategies, and responsible AI practices. - Strong Python skills and solid machine learning fundamentals. - Experience working with large-scale text or content-rich datasets and modern AI/ML frameworks.

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About Relx

People
About 13,644 in 2024.Benefit plan filings (Form 5500)
Company
Listed as REL.L.

Demand for AI Engineer roles

New AI Engineer postings at the employers we follow are up 134% over the last 6 weeks compared with the 6 before.

Weekly new AI Engineer postings at the same employers, from the week of August 17 to the week of November 2. The fewest in a week was 7, the most 65, and the latest week had 65.
August 17Last week

Each bar is one week of new postings. The darkest bars are the last 6 weeks.

Counted from the hiring pages we’ve followed for at least five weeks, so employers we add don’t look like growth. Updated weekly.

About the role

We file this job under AI Engineer, by the work the posting describes.

AI engineers build products on top of AI models that already exist, most often large language models: they connect a model to a company's data and tools and ship the assistants, agents and search features people use.

Postings ask for strong Python or TypeScript, experience with model APIs, retrieval and agent frameworks, and ways to test whether the model's answers are good enough.

An ML engineer trains and serves models; an AI engineer usually starts from a model someone else trained and builds the product around it, though titles often mix the two.

Job description

View original posting ↗

Job Description

Senior Data Scientist, London/Oxford hybrid working.

Are you excited by the opportunity to design advanced AI systems that accelerate scientific discovery and unlock knowledge at scale?

Would you enjoy building production-ready solutions using machine learning, NLP, and generative AI to create meaningful impact for researchers and professionals?

About our Team

Our global team support products education electronic health records that introduce students to digital charting and prepare them to document care in today’s modern clinical environment. We have a very stable product that we’ve worked to get to and strive to maintain. Our team values trust, respect, collaboration, agility, and quality.

About the Role

In this role, you will design and deliver advanced AI, NLP, and generative AI solutions that power knowledge discovery and decision support. You will work with complex scientific data and apply modern machine learning and LLM-based approaches to build scalable, reliable systems with real user impact. You will also collaborate across teams to turn complex challenges into practical, production-ready solutions.

Responsibilities

  • Design, build, and evaluate advanced AI/ML, NLP, and generative AI solutions for scientific and knowledge-discovery applications.

  • Develop LLM-powered workflows and retrieval-augmented generation (RAG) systems for search, summarization, question answering, and evidence-grounded insight generation.

  • Build intelligent retrieval, ranking, recommendation, and decision-support capabilities using modern orchestration frameworks and AI techniques.

  • Integrate scientific metadata, ontologies, taxonomies, and knowledge assets into scalable AI workflows.

  • Establish robust evaluation, experimentation, and monitoring frameworks to ensure quality, trust, performance, and reliability.

  • Write production-ready Python code and partner with engineering teams to deploy solutions at scale.

  • Provide technical leadership and mentoring to support high-quality delivery and continuous improvement.

Requirements

  • Practical experience in data science, AI, machine learning, NLP, information retrieval, or a related quantitative field.

  • Strong hands-on experience building AI/ML, NLP, generative AI, and retrieval-based systems in applied or product-focused environments.

  • Expertise working with LLMs, including fine-tuning, prompt engineering, grounding strategies, and responsible AI practices.

  • Strong Python skills and solid machine learning fundamentals.

  • Experience working with large-scale text or content-rich datasets and modern AI/ML frameworks.

  • Experience with RAG, semantic, vector, or hybrid search, along with experimentation and evaluation approaches that measure user impact.

  • Familiarity with cloud platforms and modern software engineering practices.

  • Strong communication, collaboration, and mentoring skills.

Work in a Way That Works for You

We promote a healthy work/life balance across the organisation. 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 Pattern

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

About the Business

A global leader in information and analytics, we help researchers and healthcare professionals advance science and improve health outcomes for the benefit of society. Building on our publishing heritage, we combine quality information and vast data sets with analytics to support visionary science and research, health education and interactive learning, as well as exceptional healthcare and clinical practice. At Elsevier, your work contributes to the world's grand challenges and a more sustainable future. We harness innovative technologies to support science and healthcare to partner for a better world.









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.

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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.

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Pay

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Location & working pattern

UK - London (London Wall)

Job Description Senior Data Scientist, London/Oxford hybrid working. Are you excited by the opportunity to design advanced AI systems that accelerate scientific discovery and unlock knowledge at scale?
More source context
- Experience working with large-scale text or content-rich datasets and modern AI/ML frameworks. - Experience with RAG, semantic, vector, or hybrid search, along with experimentation and evaluation approaches that measure user impact. - Familiarity with cloud platforms and modern software engineering practices.
Work authorization
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:

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