Senior Java Developer

Leidos is seeking an experienced Senior Java Developer to support the National Healthcare Safety Network (NHSN) Support program to design, develop, and maintain healthcare applications and data integration solutions supporting public health surveillance and healthcare data exchange. Candidate MUST:
Be a US Citizen or Green Card holder currently located in the UNITED STATES for the current three consecutive years with the ability to obtain a Public Trust Clearance. Please be advised that during the interview, you will be required to keep your camera on, and your interviewer will be taking your picture for identification purposes if an offer letter is extended to you The ideal candidate will possess strong Java development skills and hands‑on experience with HL7 healthcare interoperability standards, particularly Clinical Document Architecture (CDA).

Responsibilities include implementing and maintaining healthcare data interfaces, processing and validating clinical documents, troubleshooting complex integration issues, and supporting application modernization initiatives. The candidate will collaborate with technical teams, healthcare subject matter experts, and customer stakeholders to deliver reliable, scalable, and standards-compliant software solutions.

Independently design and implement complex Java-based healthcare integration solutions. Interpret HL7 CDA specifications and translate healthcare data requirements into technical designs. Troubleshoot complex data exchange, validation, and interoperability issues. Conduct code reviews and mentor junior and mid-level developers. Collaborate effectively with healthcare SMEs, business analysts, QA, and customer stakeholders. Identify opportunities to improve application architecture, maintainability, and automated testing.

Bachelor's degree in Computer Science, Software Engineering, Information Technology, or related field, with equivalent experience considered. 8+ years of professional software development experience, with strong proficiency in Java. Experience with Quarkus, Spring Framework, RESTful APIs, and enterprise application development. Hands‑on experience implementing or supporting healthcare data exchange using HL7 standards, particularly HL7 CDA. Experience parsing, validating, transforming, and processing CDA XML documents.

Strong knowledge of XML, XSD, XPath, and related XML processing technologies. Experience designing and implementing interfaces between healthcare information systems. Experience with relational databases, SQL, and data mapping/transformation. Experience with Git, CI/CD, automated testing, debugging, and Agile development practices. Ability to analyze complex technical problems and independently design and implement solutions. Experience implementing and troubleshooting Schema tron rules for HL7 CDA document validation.

Experience transforming CDA documents into target XML structures and validating output accuracy through automated XML comparison and regression testing. Experience performing root‑cause analysis of production integration failures, analyzing application logs, database records, and implementing monitoring, health checks, and alerting. Ability to manage differences across CDA implementation guide versions and maintain backward compatibility as healthcare reporting requirements evolve.

Experience interpreting and implementing HL7 CDA implementation guides and associated conformance requirements. Familiarity with Consolidated Clinical Document Architecture (C-CDA) and structured clinical documents. Knowledge of HL7 FHIR resources, REST APIs, and healthcare interoperability architectures. Understanding of clinical…