Senior Software Engineer (Healthcare Data / FHIR)

Salt Square is a growing outsourcing company providing high-quality software development services to clients across a wide range of industries. Our team is composed of skilled and dedicated professionals delivering innovative solutions that meet and exceed client expectations.

Our mission is to build reliable, scalable, and future-ready digital solutions tailored to each client's unique business needs. We foster a team-first culture where collaboration, continuous learning, and technical excellence are core values. From supporting startups in launching their first products to helping global enterprises scale their operations, we strive to deliver outstanding value on every project.

We are looking for a strong Senior Software Engineer with deep healthcare data and FHIR experience to join a new engagement with a US healthcare interoperability platform. You will work in a hybrid team alongside the client's own engineers and architects, building quality measurement, member insights, and data ingestion capabilities on top of a FHIR-native health data platform. The primary focus is backend and data engineering in Java (TypeScript is also in play), with regular contributions to a React/TypeScript frontend. You will be expected to drive architectural decisions with the client's architects, mentor mid-level developers, and ship production-quality code across the full stack in a regulated, PHI-handling environment.

Typical Responsibilities

• Design and build backend services that ingest, normalize, and query clinical and claims data as FHIR resources through a Common Data Model
• Implement deterministic quality measure logic (HEDIS / NCQA measures, CQL-based specifications) with support for point-in-time recalculation and full data provenance
• Build member cohort and gap-in-care query capabilities backed by Elasticsearch, and the React/TypeScript UI surfaces that expose them
• Develop and harden ingestion pipelines for healthcare source formats (CSV, X12 837 claims, XML, NCPDP fixed-width) with schema validation against FHIR Implementation Guides and client extract guides
• Integrate with EHR and payer FHIR APIs (Epic, Athena, Cerner and similar) and support upcoming payer-to-payer data exchange requirements
• Collaborate closely with the client's platform, data, and clinical acquisition architects; contribute to design decisions rather than only executing them
• Mentor mid-level developers, conduct code reviews, and uphold engineering standards across the team
• Identify and resolve performance bottlenecks, technical debt, and reliability issues proactively
• Participate in Agile sprint ceremonies, contribute to estimation, and communicate blockers and risks early
• Leverage AI-augmented development practices to accelerate delivery and improve code quality