Backend API Engineer for Scalable Healthcare AI

RXinsider LTD.; Philadelphia (Philadelphia County); On-site; USD 120,000 - 160,000; Full time

Job summary

RXinsider LTD. in Philadelphia is seeking a Backend API and Integrations Software Engineer III to design, build, and operate distributed services and APIs at scale, with emphasis on Kong API Management, HL7 FHIR, and enterprise integrations using Java and JavaScript.

You will own the API lifecycle from design to testing, implement gateway policies and secure service-to-service authentication, and collaborate across teams to deliver resilient, observable systems in a production environment.

Qualifications

• 3+ years of professional backend software engineering.
• Proficient in Java; working proficiency in JavaScript/Node.js.
• RESTful API design, OpenAPI/Swagger, contract testing, backward compatibility.
• Hands-on Kong APIM experience with routes, plugins, auth, rate limiting.
• Distributed systems fundamentals: statelessness, service discovery, retries.
• Networking fundamentals: TCP/IP, TLS/mTLS, HTTP/2/HTTP/1.1.
• FHIR familiarity: HL7 FHIR resources and adapters.
• Testing: unit/integration/contract testing; CI/CD with YAML.
• Cloud/Docker/Kubernetes experience.

Responsibilities

• Design and build resilient microservices and integration components.
• Configure Kong Gateway routes, plugins, auth, rate limiting via YAML and CI/CD.
• Develop a FHIR data facade mapping internal data to FHIR resources.
• Own API lifecycle: design, testing, versioning, and SLO-driven operations.
• Implement secure coding practices and secure network policies.

Skills

Backend engineering

Distributed systems

API design

Security & compliance

OpenAPI/Swagger

Tools

Java

Node.js

Kong API Manager

YAML

OpenAPI

Job description

RXinsider LTD. in Philadelphia is seeking a Backend API and Integrations Software Engineer III to design, build, and operate distributed services and APIs at scale, with emphasis on Kong API Management, HL7 FHIR, and enterprise integrations using Java and JavaScript.

You will own the API lifecycle from design to testing, implement gateway policies and secure service-to-service authentication, and collaborate across teams to deliver resilient, observable systems in a production environment.