Software Engineer III — Full Stack (Backend-Focused, Core Platform Services)

McKesson is an impact-driven, Fortune 10 company that touches virtually every aspect of healthcare. The Software Engineer III will design and build core services and platform components, primarily focusing on backend development with Java and Spring Boot, while also engaging in frontend work with React and TypeScript.

Responsibilities:

• Design and implement well-scoped backend services and shared components using Java and Spring Boot, following established architectural patterns
• Build and maintain RESTful APIs with clear contracts, consistent error handling, and comprehensive documentation that domain teams can adopt with minimal friction
• Implement event-driven integrations using Kafka — produce and consume events that connect clinical workflows across services (e.g., order state changes, lab result notifications, patient data sync)
• Build data integrations and pipeline components that connect to Databricks for analytics, reporting, and clinical data processing
• Write production-quality code against Oracle databases using JPA/Hibernate, with attention to query performance, transaction management, and data integrity
• Contribute to common core services, shared libraries, and frameworks that are consumed by multiple clinical domain teams (ordering, scheduling, clinical documents, genomics)
• Build services with reusability as a first-class requirement — consistent API patterns, well-defined event schemas, clear extension points
• Collaborate with domain teams to understand their integration needs and usage patterns, and adapt platform services to enable rapid application development
• Follow platform conventions for API versioning, event contracts, data handling, error taxonomy, and security standards
• Build frontend integration layers, admin UIs, and enablement interfaces using React and TypeScript to expose platform capabilities to end users and domain teams
• Implement frontend changes required to validate end-to-end clinical workflows — ensuring backend services work correctly through the full stack
• Work within the existing frontend architecture (Webpack Module Federation, legacy-to-modern migration patterns) without owning frontend architecture decisions
• Develop unit, integration, and API-level tests to ensure correctness and prevent regressions
• Participate in peer code reviews, applying established coding, security, and quality standards
• Create and maintain clear technical documentation (Markdown, Mermaid diagrams, API specs) that enables domain teams to self-serve
• Use Dynatrace for log analysis, metrics review, and distributed trace investigation to diagnose and resolve production issues with guidance from senior engineers
• Implement structured logging, telemetry, and error-handling patterns defined by the platform team
• Identify and implement incremental improvements to service reliability, performance, and operational visibility within your owned components
• Participate actively in sprint planning, backlog refinement, sprint reviews, and retrospectives
• Deliver committed work predictably, surface risks early, and communicate blockers clearly
• Adopt approved tools, frameworks, and CI/CD patterns defined by platform and architecture teams

Requirements:

• Bachelor's degree in Computer Science, Software Engineering, or equivalent practical experience
• 5 to 7 years of professional software development experience, with the majority in backend/server-side development
• Strong proficiency in Core Java and Spring Boot (dependency injection, REST controllers, data access, testing)
• Experience designing and implementing RESTful APIs consumed by multiple client applications
• Practical experience with event-driven architectures — producing and consuming messages via Kafka or equivalent
• Solid understanding of relational databases — SQL, ORM (JPA/Hibernate), indexing, query optimization, transaction management
• Experience working with or integrating into data platforms (Databricks, Spark, or equivalent) for analytics or pipeline support
• Ability to investigate production issues using Dynatrace — navigating logs, analyzing response time metrics, and following distributed traces
• Working experience with React.js and TypeScript
• Understanding of how frontend applications consume backend APIs, handle state, and render data
• Ability to build or modify frontend components to support end-to-end feature delivery
• Solid understanding of Linux/Unix environments, shell scripting, and basic networking
• Experience with Git, CI/CD pipelines, and automated testing practices
• Clear written and verbal communication — ability to document services and explain technical decisions
• Experience in healthcare IT or familiarity with clinical data standards (HL7, FHIR, C-CDA, SNOMED, LOINC, RxNorm)
• Experience building shared libraries, SDKs, or platform services consumed by other engineering teams
• Exposure to containerization (Docker) and orchestration
• Experience with Elasticsearch for search or indexing use cases
• Familiarity with Agile/Scrum methodologies in enterprise environments