Application Developer (Java, JavaScript) (Full-Stack)

About this role

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for an Application Developer (Java, JavaScript) (Full-Stack) based in the United States.

This role offers an opportunity to build the application services behind a public health IT monitoring and compliance evidence platform. You will develop Java-based services that ingest public health technology data, monitor published FHIR endpoints, validate resources, and generate reproducible evidence cases. Working across backend services, data pipelines, APIs, and supporting tools, you will help create reliable and repeatable endpoint observation workflows. You will implement deterministic validation rules that make compliance pass/fail decisions, while ensuring AI-assisted components only summarize and support analysis rather than determine final outcomes. The position combines Java and JavaScript development with AWS infrastructure, automated testing, and healthcare interoperability standards. You will collaborate with technical and engineering leads in a part-time, remote contract environment.

### Accountabilities

• Build ingestion connectors for the Certified Health IT Product List (CHPL), Service Base URL Lists, developer-published FHIR Bundles, Lantern, and other approved public sources.
• Preserve raw source artifacts, timestamps, request metadata, response headers, and hashes to support traceability and reproducibility.
• Normalize developer, product, version, criterion, CHPL ID, endpoint, organization, and validation records into the project's common data model in DynamoDB, applying lineage and source-of-truth precedence rules.
• Implement publication checks that retrieve endpoint lists and classify availability failures, including URLs not found, timeouts, obscuring redirects, malformed responses, and non-machine-readable content.
• Build safe, non-authenticated endpoint observation capabilities for metadata and CapabilityStatement ret...