RELX

Backend API’s and Integrations Software Engineer III

RELX
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4 days ago
Remote, United States or Philadelphia, PA, USASenior

Base Salary

$79k - $131k/yr

Responsibilities

  • Design and build resilient, observable distributed services and integration components using Java and, where appropriate, Node.js/JavaScript.
  • Configure and manage Kong Gateway routes, services, plugins, rate limiting, authentication, mutual TLS, logging, and declarative configurations.
  • Implement gateway security and traffic policies, blue/green and canary releases, and zero-downtime migrations.
  • Build and maintain an HL7 FHIR data facade that maps internal domain data to FHIR resources for reading, searching, and transformation.
  • Develop backend integrations with downstream REST, gRPC, and messaging or queue systems while managing schema and contract evolution.
  • Own the API lifecycle from OpenAPI design and implementation through automated testing, versioning, and SLO-driven operations.
  • Create and maintain API specifications, mocks, and validation pipelines.
  • Implement OAuth2/OIDC flows, token introspection, service-to-service authentication, secure coding practices, and least-privilege network policies.

Requirements

  • At least 3 years of professional backend software engineering experience.
  • Proficiency in Java and working proficiency in JavaScript and Node.js.
  • Experience with RESTful API design, OpenAPI/Swagger, contract testing, backward compatibility, and versioning.
  • Hands-on Kong API Management experience configuring routes, plugins, authentication, rate limiting, declarative YAML configurations, and CI/CD integrations.
  • Understanding of distributed-systems fundamentals including statelessness, service discovery, retries, circuit breakers, and caching.
  • Knowledge of TCP/IP, DNS, TLS/mTLS, HTTP/2, HTTP/1.1, proxies, load balancing, and troubleshooting tools such as cURL and traceroute.
  • Experience with HL7 FHIR, adapters, FHIR resource modeling, and transformations involving resources such as Patient, Observation, and Encounter.
  • Experience with unit, integration, and contract testing, test automation, and YAML-based workflow pipelines.
  • Experience deploying and operating services in cloud or containerized environments such as Docker or Kubernetes.

Benefits

  • Annual incentive bonus eligibility.
  • Country-specific benefits are offered based on work location.
  • Accommodation and adjustment support is available during the hiring process.
RELX

About RELX

1,001-5,000 employees
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