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Spearhead Staffing

Full Stack Developer

Spearhead Staffing, Uniondale, New York, United States, 11553

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Job Description

Job Description We are currently looking for a Full Stack Developer for our client in the NY metro area.

This is for a full-time, remote position

, working on a new Internal EMR Build for the organization. This Sr. Application Developer will lead the architecture, development, and optimization of our secure, HIPAA-compliant, multi-tenant EMR SaaS platform on Microsoft Azure. The role will be a Full-Stack position helping to drive the performance of their ASP.NET CORE and REACT Applications, REST APIs for 3rd party integrations, and improving enterprise-grade security.

The ideal candidate will have 5+ years working within ASP.NET Core/C#, 4+ years working within REACT, Azure App Services, and experience integrating AI/ML into Web Applications. Experience working within the Payer or Provider space would be a major plus. Job Responsibilities: Full-Stack Leadership: Lead design, development, and optimization of ASP.NET Core and React applications with a focus on performance, scalability, and maintainability. Multitenancy: Drive evolution of multi-tenant architecture (tenant isolation, RBAC, efficient resource utilization, caching, and quotas). API Architecture: Design and operate secure, performant, and versioned RESTful APIs for vendor integrations; implement OAuth 2.0/OIDC, JWT, API keys, validation, idempotency, and robust error handling. Mentorship & Standards: Mentor junior/mid-level engineers; conduct thorough code reviews; champion documentation, testing, and continuous improvement. Cross-Functional Delivery: Translate complex requirements into sound technical designs; collaborate with product, solution architects, security, and DevOps through the full SDLC. Performance & Reliability: Diagnose and resolve issues across UI, APIs, databases, and Azure infrastructure; drive profiling, query tuning, and front-end performance. Agile Execution: Lead sprint planning, daily stand-ups, retrospectives, and backlog refinement; deliver predictable increments with high quality. Code Quality: Write clean, testable, well-documented code; enforce CI/CD quality gates and architectural guidelines. Qualifications: Backend/Frontend Development: 5+ years ASP.NET Core/C# building large-scale, distributed systems. Secure REST API design and governance (OAuth 2.0/OIDC, JWT, API keys), contract/version management, and API security best practices. Advanced SQL Server: schema design, complex stored procedures, indexing, query optimization, and performance tuning for high-volume workloads. 4+ years React (functional components, hooks), advanced state management (Context/Redux), and performance optimization for large apps. Mastery of TypeScript/ES6+, async patterns, and modular architecture. Strong HTML5/CSS3 and responsive design; cross-browser compatibility and accessibility (a11y). Proven ability to integrate complex APIs and manage client-side data flow and UX. Azure Services: Azure App Service (deployment slots, scale, troubleshooting). Azure SQL Database (performance tiers, geo-replication, monitoring). Microsoft Entra ID (Azure AD) and Azure Key Vault. Serverless & Containers: Azure Functions, Logic Apps; AKS or Azure Container Instances. Observability: Azure Monitor and Application Insights (logging, tracing, metrics). AI/Machine Learning: Experience integrating AI/ML into web apps via Azure Machine Learning or custom APIs. Understanding of data preparation and collaboration with data science under HIPAA guidelines. Familiarity with enterprise AI/ML concepts and use cases. Proficiency in Python to develop, deploy, or integrate models in Azure (AML SDK, Azure Functions). Testing & Tooling: Unit testing with xUnit/NUnit; integration and end-to-end testing strategies. Postman and Swagger/OpenAPI for API documentation and automated testing. Expert-level GitHub workflows (branching, pull request reviews, GitHub Actions CI/CD). Front-end tooling (Vite/Webpack, npm/yarn) and build optimization Education: Bachelor’s degree in Computer Science or related field. Please note:

This position is not open to 3rd party c2c agencies. No visa sponsorship provided. All applicants must have permanent US work authorization and not require sponsorship now -or- in the future.

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