LSEG (London Stock Exchange Group)

Principal AI Engineer

LSEG (London Stock Exchange Group)

full-time

Posted on:

Location Type: Office

Location: London • United Kingdom

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Job Level

Lead

Tech Stack

AWSAzureCloudGoogle Cloud PlatformJavaPython

About the role

  • Design and implement complex, scalable, and secure applications.
  • Write clean, efficient, and maintainable code in Java, Python, and other high-level languages.
  • Provide architectural guidance and ensure adherence to best practices.
  • Optimize system performance and troubleshoot critical issues.
  • Develop and refine prompt engineering strategies for LLM-based applications.
  • Integrate and optimize Large Language Models (LLMs) into products and workflows.
  • Collaborate with AI teams to improve model performance and user experience.
  • Stay current with emerging technologies, frameworks, and AI advancements.
  • Prototype and evaluate new tools and methodologies for adoption.
  • Work closely with product managers, QA, and other developers to deliver high-quality solutions.
  • Advocate for automation, testing, and continuous integration practices.
  • Ensure compliance with security and regulatory standards.

Requirements

  • 12+ years in software development, with a least a year in AI Development.
  • Extensive experience in software development and system architecture.
  • Proven ability to deliver complex projects with high technical standards.
  • Strong technical background in Java, Python, and/or other high-level programming languages.
  • Expertise in designing scalable and secure systems.
  • Hands-on experience with AI tools and frameworks, including: Prompt Engineering for LLMs (e.g., OpenAI GPT, Anthropic Claude).
  • Model fine-tuning and deployment.
  • AI integration into enterprise applications.
  • Prompt management tools (Langfuse)
  • Knowledge of vector databases, embeddings, and retrieval-augmented generation (RAG).
  • Experience with cloud platforms (AWS, Azure, GCP).
  • Familiarity with CI/CD pipelines and modern development tools.
Benefits
  • Healthcare
  • Retirement planning
  • Paid volunteering days
  • Wellbeing initiatives

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
JavaPythonAI DevelopmentSystem ArchitecturePrompt EngineeringModel Fine-tuningAI IntegrationVector DatabasesEmbeddingsRetrieval-Augmented Generation
Soft skills
CollaborationProblem SolvingTechnical GuidanceProject DeliveryAdherence to Best Practices