Java Developer

Seeking an experienced Java Developer to design, develop, and maintain scalable healthcare data exchange solutions and HL7 FHIR (Fast Healthcare Interoperability Resources) APIs. The ideal candidate will be a collaborative team member who contributes to a multidisciplinary engineering group focused on secure, high-performance interoperability for public health and clinical data exchange initiatives.

• Collaborate closely with other developers, architects, QA engineers, and Dev Ops staff to deliver high‑quality, maintainable software.
• Design, develop, and implement HL7 FHIR compliant REST APIs using Java and Spring Boot.
• Implement and manage FHIR resources, profiles, value sets, and code systems.
• Build and maintain data transformations between internal data models and FHIR resource structures.
• Design and implement data transformation pipelines to process diverse data formats-including TSV, XML, JSON, CSV, and HL7 messages-for ingestion, mapping, and exchange.
• Develop reusable data parsing, normalization, and validation components to support scalable ETL/ELT workflows in clinical and public health data exchange contexts.
• Optimize API performance, scalability, and reliability through code tuning, caching, and asynchronous processing.
• Maintain clear documentation for APIs, data models, deployment, and versioning.
• Troubleshoot and resolve interoperability issues, FHIR validation errors, and integration defects.
• Participate in peer reviews, knowledge‑sharing sessions, and team retrospectives to promote continuous improvement.
• Contribute to CI/CD pipelines and Dev Ops automation for build, test, and deployment processes.
• (Bonus) Collaborate on frontend development tasks where integration with FHIR APIs or data visualization is needed.

• Minimum 5 years of professional software development experience.
• Strong proficiency in Java (Java 11 or higher).
• Hands‑on experience with Spring Boot, Spring MVC, and JPA/Hibernate.
• Solid understanding of RESTful API design, JSON, and XML data exchange.
• Experience building robust data transformation workflows (e.g., parsing, mapping, and serializing TSV, CSV, JSON, XML, NDJSON).
• Ability to implement schema-driven transformations and validation logic using tools such as JAXB, Jackson, or custom parsers.
• Practical experience with API security (OAuth2, JWT, HTTPS, authentication/authorization patterns).
• Proficiency in relational databases (Oracle, Postgre
  
  SQL, or MySQL) and complex SQL queries.
• Experience working in Agile/Scrum environments using JIRA and Git Lab or equivalent tools.
• Proven ability to work collaboratively within a team, mentor peers, and support collective problem-solving.
• Strong problem‑solving skills and ability to debug complex integration issues.

• Direct exposure to HL7 FHIR standards and interoperability frameworks.
• Experience with the HAPI FHIR library and associated tools.
• Familiarity with HL7 v2.x and other healthcare interoperability standards.
• Experience implementing FHIR terminology services and managing value sets/code systems.
• Understanding of medical terminologies (e.g., SNOMED CT, LOINC, ICD‑10, RxNorm) and their mapping to FHIR value sets.
• Exposure to continuous testing and API monitoring tools.
• Bonus:
  Experience with JavaScript and Type Script for light frontend development or full‑stack integration.
• Bonus:
  Familiarity with modern frontend frameworks such as React, Angular, or Vue for building healthcare dashboards or API testing interfaces.
• Bonus:
  Demonstrated ability to collaborate across cross‑functional teams including UX, analytics, and operations.
• Bonus:
  Experience working with AWS services (e.g., Lambda, API Gateway, S3, RDS) to build cloud‑native applications.
• Bonus:
  Hands‑on experience with Serverless Framework for deploying and managing serverless applications in AWS.
• Bonus:
  Understanding of cloud security best practices, IAM policies, and HIPAA‑compliant cloud architectures.