Backend API’s and Integrations Software Engineer III
Are you a Backend API developer looking to work for a mission driven global organization?
About the role: We’re seeking a Software Engineer III with strong backend engineering skills to design, build, and operate distributed integration services and APIs at scale. You will focus on Kong API Management, backend API lifecycle (setup, testing, maintenance), HL7 FHIR, and enterprise integrations, primarily using Java and JavaScript. The ideal candidate has solid network fundamentals, can work comfortably with YAML (for declarative configs and pipelines), and thrives in pragmatic, production-oriented engineering—no frontend development in this space.
About the team, this team is building a generative-AI-powered clinical decision support tool designed specifically to help healthcare professionals quickly find trusted, evidence-based answers at the point of care. It combines a massive curated medical knowledge base with conversational AI so clinicians can ask questions in natural language and get concise, clinically relevant responses backed by real scientific evidence.
Responsibilities
- Design & Build Distributed Services
- Implementing resilient, observable microservices and integration components (Java preferred; Node.js/JavaScript where appropriate).
- Applying patterns for scaling, fault tolerance, idempotency, and backpressure in distributed environments.
- API Platform & Kong APIM
- Configuring and managing Kong Gateway (routes, services, plugins, rate limiting, auth, mTLS, logging) via declarative config (YAML) and CI/CD.
- Implementing gateway policies for security, traffic control, blue/green/canary releases, and zero-downtime migrations.
- Integrations & Data Facades
- Building and maintaining a FHIR data facade that maps internal domain data to FHIR resources (read/search/transform), ensuring correctness and performance.
- Developing backend integrations with downstream systems (REST, gRPC, messaging/queues) and handle schema/contract evolution.
- API Engineering
- Owning the API lifecycle: design (OpenAPI), implementation, automated testing (unit/integration/contract), versioning, and SLO-driven operations.
- Creating and maintaining OpenAI specs, mocks, and validation pipelines.
- Security & Compliance
- Implementing OAuth2/OIDC flows, token introspection, and service-to-service auth. Apply secure coding practices and least-privilege network policies; partner with InfoSec on reviews.
Required Qualifications
- 3+ years of Professional Experience in backend software engineering.
- Languages: Proficient in Java; working proficiency in JavaScript/Node.js.
- API & Integrations: RESTful API design, OpenAPI/Swagger, contract testing, backward compatibility/versioning.
- API Gateway / Kong APIM: Hands-on experience configuring routes, plugins, auth, rate limiting, and declarative YAML configs; CI/CD integration.
- Distributed Systems: Understanding of microservices fundamentals: statelessness, service discovery, retries/circuit breakers, caching.
- Networking Fundamentals: TCP/IP, DNS, TLS/mTLS, HTTP/2/HTTP/1.1, proxies, load balancing, and common troubleshooting (cURL, traceroute, etc.).
- Data & FHIR Facade: Experience working with HL7 FHIR or adapters; familiarity with FHIR resource modeling and transformations (e.g., Patient, Observation, Encounter).
- Testing & Quality: Unit, integration, and contract testing; test automation and CI/CD pipelines (YAML-based workflows).
- Cloud & Ops: Experience deploying and operating services in a cloud or containerized environment (Docker/Kubernetes).
We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits. Click here to access benefits specific to your location.
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Skills Required
- 3+ years of professional experience in backend software engineering
- Proficient in Java
- Working proficiency in JavaScript/Node.js
- RESTful API design, OpenAPI/Swagger, contract testing, backward compatibility/versioning
- Hands-on experience with Kong Gateway/APIM (routes, services, plugins, auth, rate limiting) and declarative YAML configs; CI/CD integration
- Understanding of distributed systems fundamentals (statelessness, service discovery, retries/circuit breakers, caching)
- Networking fundamentals (TCP/IP, DNS, TLS/mTLS, HTTP/2, HTTP/1.1, proxies, load balancing, troubleshooting tools)
- Experience working with HL7 FHIR or adapters and familiarity with FHIR resource modeling and transformations
- Unit, integration, and contract testing; test automation and CI/CD pipelines (YAML-based workflows)
- Experience deploying and operating services in a cloud or containerized environment (Docker/Kubernetes)
RELX Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about RELX and has not been reviewed or approved by RELX.
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Retirement Support — Retirement support is positioned as a meaningful part of total rewards through a 401(k) plan with matching contributions, alongside other financial protections such as life and disability coverage. Tuition reimbursement and share purchase access further broaden the financial value of the package beyond base salary.
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Leave & Time Off Breadth — Leave and time off breadth appears strong, with generous vacation allowances, mental health days, and options like sabbaticals and tiered PTO by tenure. Parental and caregiving leaves are described in detail, reinforcing time-away benefits as a standout component of the overall package.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle benefits are supported by offerings such as mental health support (e.g., app access), EAP resources, gym-related perks, and wellness incentives. Flexible working hours and related work-life supports add to the perceived day-to-day value of benefits.
RELX Insights
What We Do
RELX is a global provider of information-based analytics for professional and business customers across industries. We help scientists make new discoveries, doctors and nurses improve the lives of patients and lawyers win cases. We prevent online fraud and money laundering, and help insurance companies evaluate and predict risk. Our events enable customers to learn about markets, source products and complete transactions. In short, we enable our customers to make better decisions, get better results and be more productive. We do this by leveraging a deep understanding of our customers to create innovative solutions which combine content and data with analytics and technology in global platforms. RELX serves customers in more than 180 countries and has offices in about 40 countries. It employs approximately 30,000 people of whom almost half are in North America. We operate in four major market segments: Scientific, Technical & Medical; Risk & Business Analytics; Legal; and Exhibitions.
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