RELX

Senior Software Engineer – Retrieval-Augmented Generation (RAG)

RELX

full-time

Posted on:

Location Type: Office

Location: PhiladelphiaNew JerseyPennsylvaniaUnited States

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Salary

💰 $95,300 - $158,800 per year

Job Level

About the role

  • Architecting, implementing, testing, and operating end-to-end RAG workflows: Ingesting and normalizing documents from diverse sources
  • Generating and managing embeddings; index and query vector databases
  • Retrieve relevant passages, apply reranking or fusion strategies, and feed prompts to LLMs
  • Building scalable, low-latency services and APIs (Python preferred; other languages acceptable) and ensure production-grade reliability (monitoring, tracing, alerting)
  • Integrating with vector databases and embedding pipelines and optimize for latency, throughput, and cost
  • Designing and implementing ML Ops workflows: model/version management, experiments, feature stores, CI/CD for ML-enabled services, rollback plans
  • Developing robust data pipelines and governance around ingestion, provenance, quality checks, and access controls
  • Collaborating with data engineers to improve retrieval quality (embedding strategies, reranking, cross-encoder models, prompt engineering) and implement evaluation metrics (precision/recall, MRR, QA accuracy, user-centric metrics)
  • Implementing monitoring and observability for RAG components (latency, success rate, cache hit rate, retrieval quality, data drift)
  • Ensuring security, privacy, and compliance (authentication, authorization, data masking, PII handling, audit logging)

Requirements

  • 5+ years of professional software engineering experience designing and delivering production systems
  • Strong programming skills (Python required; NodeJs a plus)
  • Deep understanding of retrieval-augmented or application-scale NLP systems and practical experience building RAG-like pipelines
  • Hands-on experience with ML workflow tooling and MLOps concepts (model serving, versioning, experiments, feature stores, reproducibility)
  • Proficiency with cloud infrastructure and modern software practices (AWS/GCP/Azure; Docker; Kubernetes; CI/CD)
  • Strong problem-solving skills, excellent communication, and ability to work with cross-functional teams
  • Familiarity with data governance, privacy, and security best practices
Benefits
  • Country specific benefits
  • Annual incentive bonus
Applicant Tracking System Keywords

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

Hard Skills & Tools
PythonNodeJsML OpsNLPdata pipelinesembedding strategiesretrieval-augmented generationmonitoringobservabilityevaluation metrics
Soft Skills
problem-solvingcommunicationcollaborationcross-functional teamwork