Relx Group

Principal Machine Learning Engineer I

Relx Group • $136K — $252K *
Legal & Accounting
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • 10+ years of experience in Machine Learning and Software Engineering.
  • Master's or Bachelor's degree in Computer Science, preferred.
  • Strong background in software engineering with system design expertise.
  • Hands-on experience architecting AI features and products for large user bases.
  • Proficiency in deploying ML models to production environments.

Responsibilities

  • Provide architectural direction and code-level guidance for machine learning systems.
  • Establish best engineering practices for designing, testing, and deploying ML systems.
  • Conduct design and performance reviews while planning technical roadmaps.
  • Architect scalable distributed ML systems for global products.
  • Standardize infrastructure patterns for large language model serving and retrieval systems.
  • Define and implement frameworks for enterprise-level agentic systems.
  • Develop multi-step reasoning systems and lead decisions on workflow strategies.

Benefits

  • Country-specific benefits that cater to employee well-being and happiness.
  • Eligibility for an annual incentive bonus.
Full Job Description
About the Role

Do you love collaborating with teams to solve complex technical problems?

We are seeking a Principal Machine Learning Engineer to design, build, and operate scalable AI/ML systems and agentic architectures that support next-generation legal research and analytics products. This role combines deep ML expertise with distributed systems engineering and AI platform development.

You will play a key role in developing enterprise-grade AI systems, including large language model (LLM) infrastructure, retrieval-augmented generation (RAG) pipelines, and autonomous agent frameworks designed for complex large unstructured data.

Responsibilities:
  • Provide architectural direction and code-level guidance.
  • Establish engineering best practices for ML system design, testing, and deployment.
  • Conduct design reviews, performance reviews, and technical roadmap planning.
  • Architect distributed ML systems serving multiple global products.
  • Standardize infrastructure patterns for LLM serving and retrieval systems.
  • Define and implement enterprise-ready agentic frameworks.
  • Architect multi-step reasoning systems.
  • Lead decisions on deterministic workflows vs. autonomous agents.
  • Implement guardrails, safety layers, and traceability mechanisms.
  • Develop evaluation frameworks to measure reasoning quality, hallucination rates, and reliability.
  • Establish CI/CD standards for ML lifecycle management.
  • Ensure compliance with enterprise data governance and responsible AI standards.


Requirements
  • 10 + years of Machine Learning/Software Engineer experience
  • Master's degree or bachelor's degree, computer science degree is highly desirable.
  • Strong software engineering background with experience in building system design, architecting AI feature/products that caters large number of users and deals with large volume of unstructured data
  • Experience with ML deployment to production
U.S. National Base Pay Range: $136,100 - $252,800. 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.

About Relx Group

RELX Group is a global provider of information-based analytics and decision tools for professional and business customers. The company operates in four market segments: scientific, technical and medical; risk and business analytics; legal; and exhibitions. RELX's products and services include electronic databases, online information services, workflow tools, and print and digital books. The company was founded in 1993 and is headquartered in London, England.
Learn more about Relx Group
Size
33,500 employees
Market Cap
$53.1 billion
Industry
Net Income
$1.2 billion
Founded
2018
5 Year Trend
+1%
Revenue
$7.1 billion
NASDAQ

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