RELX

Principal Software Engineer/Principal AI Engineer

RELX
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20 days ago
Philadelphia, PA, USAStaff+

Base Salary

$115k - $192k/yr

Responsibilities

  • Own technical execution of AI initiatives from discovery through production, including building, assessing, and hardening prototypes and proofs of concept.
  • Design and govern reusable agentic AI patterns covering orchestration, tool use, memory, retrieval, and production guardrails.
  • Integrate AI solutions with enterprise systems through APIs and data pipelines while meeting security, compliance, data-governance, residency, and infrastructure standards.
  • Codify validated solutions into reusable patterns, reference implementations, and starter kits for adoption across functions.
  • Finalize requirements, provide design input, write specifications, fix complex bugs, and design complex data models with internal stakeholders and end users.
  • Provide infrastructure, hosting, sizing, budget, and managed-service recommendations and act as the squad's primary technical contact for external resources.
  • Plan and sequence delivery, manage scope and dependencies, remove blockers, and drive pilots toward production.
  • Establish baselines and instrumentation to measure productivity, cost, and quality outcomes from pilot through scale.
  • Track in-flight AI pilots to prevent duplication and identify opportunities for reuse.
  • Evaluate emerging technologies, make technical decisions, and mentor and elevate engineers.

Requirements

  • 10+ years of software engineering experience with hands-on AI system design, build, or integration and a record of taking enterprise AI prototypes to production.
  • Bachelor's degree in Engineering or Computer Science, or equivalent experience; an advanced degree is preferred.
  • Experience with LLM orchestration, prompt engineering, context-window management, production guardrails, MCP, tool-augmented agents, and enterprise-scale RAG.
  • Experience integrating AI into enterprise systems through APIs and data pipelines with strong security, data-governance, and data-residency practices.
  • Experience with AWS, Azure, or GCP and managed AI/ML services.
  • Knowledge of relational, columnar, and vector data stores and sound software architecture principles.
  • Proficiency in Python, Java, TypeScript or JavaScript, SQL, and relevant AI SDKs.
  • Experience planning delivery, managing scope and dependencies, influencing technical decisions, communicating with senior stakeholders, and coordinating internal and external resources.
  • Budget awareness and experience measuring productivity, cost, and quality outcomes for AI initiatives.
  • Ability to work effectively in ambiguity, frame problems, define specifications, and prioritize shipping validated outcomes.

Benefits

  • Flexible working hours and a focus on work/life balance.
  • Comprehensive pension plan, generous vacation entitlement, and sabbatical leave options.
  • Maternity, paternity, adoption, and family care leave.
  • Personal Choice budget, employee discounts, internal communities and networks, and a recruitment introduction reward.
  • Global Employee Assistance Program, wellbeing initiatives, study assistance, and country-specific benefits.
  • The role is eligible for an annual incentive bonus.
RELX

About RELX

1,001-5,000 employees

RELX provides information-based analytics, research content, and decision tools for scientists, legal and risk professionals, insurers, and governments. Through segments including Elsevier (STM), LexisNexis (legal and risk), and RX (exhibitions), it sells subscriptions, data services, and software platforms used in 180+ countries. Headquartered in London, it is a public company listed in London and Amsterdam.

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