Application Developer Iii

The Application Developer III supports the building of the organization’s multi-tenant healthcare SaaS platform on Microsoft Azure. The platform serves multiple enterprise clients and supports daily operations, including member enrollment and eligibility checks, scheduling, care‑coordination workflows, document management, configurable forms and assessments, letters, reporting, and team communication. The role helps ensure each tenant’s data remains strictly isolated and supports secure data exchange with payers and other vendors through APIs and integrations.

The position contributes across the whole stack, including APIs, databases, front‑end, cloud infrastructure, and AI features, while setting technical standards for the development team. This senior full‑stack development role supports the advancement of a rapidly growing healthcare platform that is in active development.

Build features end to end. The back end is an ASP.NET Core API that uses CQRS with MediatR, Fluent Validation, and EF Core. The front end is Type Script, built with React Native for Web (Expo), Redux Toolkit, and RTK Query. Drive the implementation and evolution of our multi‑tenant architecture, with strict data isolation between tenants, strong access controls, and efficient use of resources.

Build secure, versioned REST APIs with:
Microsoft Entra  / JWT authentication role‑and capability‑based access control field‑level permissions checks that a user may access each specific record audit logging that meets HIPAA requirements Build and maintain integrations: X12 EDI 270/271 eligibility, e‑signature, contact‑center phone systems, SFTP file exchange, and Microsoft Graph. These run on Azure Service Bus, Azure Functions, and background services. Extend the platform’s workflow automation engine, which runs on events and schedules and is built on Durable Task.

Work on real‑time features (SignalR) for notifications, chat, and live updates. Build AI features with Azure OpenAI, keeping PHI exposure to a minimum and a person in the loop: an assistant that can call tools document search that answers with citations (Azure AI Search) AI sorting of incoming documents live speech transcription (Azure Speech) that suggests form answers for a user to accept Design SQL Server schemas with our data team, write and tune complex queries, and fix EF Core performance problems on large tables.

Ship through Git Hub Actions to Azure: container images on App Service (via Azure Container Registry), Azure Functions and Azure Static Web Apps, monitored with Application Insights. Review code, mentor junior and mid‑level developers, and raise the bar on testing (xUnit, Moq, Jest, React Testing Library), documentation and architecture. Work closely with product owners, the data team, and other engineers in an Agile team: sprint planning, stand‑ups, backlog refinement, and retrospectives.

Solve hard production problems anywhere in the stack, from slow screens and query plans to authorization failures and Azure configuration.

Schedule:

8:30AM – 5:30PM Weekly

Hours:

40

Location:

On‑Site, 136‑65 37th Avenue, Flushing, NY 11354

Education:

Bachelor’s degree in Computer Science or related field. Required Skills & Experience Backend 7+ years building production systems with C# and ASP.NET Core, including large‑scale, distributed systems. Strong REST API design and security: OAuth 2.0 / OpenID Connect, JWTs, API keys, validation, error handling, and versioning. You know how to prevent unauthorized record access (IDOR) and leaking internal details in error messages.

Strong SQL Server skills: schema design, complex queries and stored procedures, indexing, execution plans and tuning for high data volumes.…