Seniot React Native & Healthcrea Integrations Developer | Claude Code, MCP, FHIR, APIs

Project Overview We are seeking an exceptional senior full-stack developer to support the continued development of a healthcare-focused mobile application. The ideal candidate has deep experience with React Native, TypeScript, healthcare interoperability, complex third-party API integrations, Claude Code, and Model Context Protocol (MCP). This is not a basic API integration project. We need someone who understands how to securely connect multiple systems, manage sensitive healthcare information, resolve synchronization challenges, and build reliable, scalable integrations. You must be comfortable working within an existing codebase, diagnosing production issues, and independently developing and implementing technical solutions. Key Responsibilities Healthcare Integrations & Interoperability ● Integrate healthcare systems, EHR platforms, and third-party medical applications. ● Work with FHIR, HL7, SMART on FHIR, and healthcare APIs. ● Handle medical data normalization, record reconciliation, synchronization, and secure data exchange. ● Develop permission-based information-sharing workflows across different platforms. ● Understand the challenges of healthcare data accuracy, patient identity, and privacy. React Native & Full-Stack Engineering ● Develop and maintain React Native applications for iOS and Android. ● Work with TypeScript, React, backend APIs, and cloud-based services. ● Troubleshoot existing application issues and improve performance, stability, and scalability. ● Build secure, intuitive features that connect mobile interfaces with backend systems. Calendar, Email & Third-Party Integrations ● Build and troubleshoot integrations with Google Calendar, Gmail, Microsoft Outlook, and Microsoft 365. ● Implement OAuth 2.0, webhooks, token refresh, background synchronization, and event-driven workflows. ● Handle bidirectional synchronization, duplicate records, API limitations, and conflicting updates. AI Development & MCP ● Demonstrate professional proficiency with Claude Code for development, debugging, refactoring, and testing. ● Design and implement MCP servers, clients, and secure AI tool integrations. ● Work with third-party AI APIs, SDKs, and agent frameworks. ● Apply appropriate safeguards when AI systems interact with sensitive or protected data. Required Skills ● Expert-level React Native and TypeScript experience. ● Strong backend development and REST API integration experience. ● Proven experience with healthcare data systems, EHR integrations, or medical interoperability. ● Working knowledge of FHIR, HL7, and OAuth 2.0. ● Demonstrated experience with Google Calendar and/or Gmail API integrations. ● Practical experience using Claude Code in professional development. ● Hands-on familiarity with MCP architecture and AI tool integrations. ● Strong understanding of HIPAA-related security requirements, authentication, authorization, and secure data handling. ● Ability to independently debug complex production issues and deliver tested, maintainable code. Preferred Experience ● Epic, Oracle Health/Cerner, athenahealth, Medplum, Redox, or comparable healthcare platforms. ● School health, pediatric healthcare, care coordination, or multi-user health information systems. ● FERPA and cross-organizational health information sharing. ● Apple Health, Health Connect, wearable devices, or remote monitoring. ● AI agent development and secure AI infrastructure. ● Cloud infrastructure, CI/CD, automated testing, and production monitoring. Ideal Candidate We are looking for an experienced engineer who can move comfortably between mobile development, backend infrastructure, healthcare APIs, and AI integrations. You should be a strong independent problem-solver, communicate clearly, and have experience working within an established application rather than only building new projects from scratch. Experience handling sensitive healthcare information is especially important. We are interested in establishing a long-term relationship with the right developer. To Apply — Please Answer These Questions Generic or AI-generated proposals that do not address the questions below will not be prioritized. 1. Describe a healthcare integration you personally built. Which EHR systems, APIs, or interoperability standards did you use? 2. What is your experience with React Native and TypeScript? Please share examples of production applications you have worked on. 3. Have you implemented Google Calendar or Gmail integrations involving OAuth, webhooks, or bidirectional synchronization? Explain your role. 4. How do you use Claude Code in your development workflow? Have you built or integrated MCP servers or clients? 5. Describe a difficult production integration issue you diagnosed and resolved. Please include your hourly rate, weekly availability, time zone, and earliest potential start date. We are looking for proven technical experience, sound engineering judgment, and someone who takes ownership of their work.