RELX

Principal Software Engineer – Agentic AI

RELX

full-time

Posted on:

Location Type: Office

Location: St Louis • Montana • North Carolina • United States

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Salary

💰 $115,400 - $192,300 per year

Job Level

Lead

About the role

  • Lead the design and development of agentic AI systems
  • Architect and deliver autonomous workflows, multi-step reasoning agents, and AI copilots that solve complex business problems across the organization.
  • Define and implement LLM-powered architectures
  • Design scalable solutions leveraging large language models, orchestration frameworks (e.g., LangChain, OpenAI APIs), and modular service patterns to enable reusable AI capabilities.
  • Build and optimize tool-augmented agents
  • Develop agents that effectively utilize function calling, retrieval-augmented generation (RAG), memory systems, and planning/execution loops to perform reliable, context-aware tasks.
  • Establish best practices for prompt engineering and evaluation
  • Create standardized approaches for prompt design, testing, benchmarking, and continuous improvement to ensure high-quality outputs in production environments.
  • Implement production-grade guardrails and safety mechanisms
  • Design and enforce controls for hallucination mitigation, output validation, policy compliance, and safe execution of AI-driven workflows.
  • Drive AI system performance and reliability
  • Optimize latency, throughput, and cost efficiency of AI systems while ensuring high availability, observability, and fault tolerance across agent workflows.
  • Design and manage retrieval systems
  • Architect solutions using embeddings, vector databases, and hybrid search techniques to enable accurate, scalable knowledge retrieval.
  • Integrate AI capabilities into enterprise platforms
  • Embed AI services into existing products, APIs, and developer workflows, ensuring seamless interoperability with enterprise systems and data sources.
  • Lead technical strategy and cross-functional alignment
  • Partner with product, data, and engineering leaders to define AI roadmaps, prioritize initiatives, and align solutions with business objectives.
  • Champion responsible AI practices
  • Ensure systems adhere to standards for fairness, bias mitigation, transparency, and governance, while meeting regulatory and organizational compliance requirements.
  • Mentor and elevate engineering teams
  • Provide technical leadership, guide architectural decisions, and mentor engineers in building scalable, maintainable AI systems.
  • Continuously evaluate emerging technologies
  • Stay at the forefront of advancements in AI/ML, agent frameworks, and tooling, and drive adoption of innovations that create competitive advantage.

Requirements

  • Experience designing, building, or integrating agentic AI systems (e.g., autonomous workflows, multi-step reasoning agents, AI copilots).
  • Hands-on experience with LLMs and orchestration frameworks (e.g., LangChain, OpenAI APIs, or similar).
  • Ability to design tool-augmented agents (function calling, retrieval-augmented generation, memory systems, planning/execution loops).
  • Experience with prompt engineering, evaluation, and guardrails for production-grade AI systems.
  • Understanding of AI system architecture, including latency, cost optimization, observability, and reliability of agent workflows.
  • Familiarity with vector databases, embeddings, and retrieval systems.
  • Experience integrating AI capabilities into enterprise systems and developer workflows.
  • Knowledge of responsible AI practices, including safety, bias mitigation, and governance.
Benefits
  • health insurance
  • retirement plans
  • paid time off
  • flexible work arrangements
  • professional development
  • annual incentive bonus
Applicant Tracking System Keywords

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

Hard Skills & Tools
agentic AI systemslarge language modelsorchestration frameworksfunction callingretrieval-augmented generationmemory systemsplanning/execution loopsprompt engineeringAI system architecturevector databases
Soft Skills
technical leadershipmentoringcross-functional alignmentstrategic planningcommunication