Full stack Developer (Backend-Focused) (.NET Core+ReactTS)

**Type:** full-time **Experience:** 3–5 years **Required skills:** .NET Core, C#, ASP.NET Core, React.js, TypeScript, REST API Development, Entity Framework Core, SQL & Database Management, SignalR, WebSockets, Docker, Unit & Integration, Testing, Code Coverage, File Upload & Processing, Third-Party API Integrations, Infobip/Twilio SDKs, Webhooks & FHIR Integrations, HIPAA-Compliant Development, Git & Version Control, GitHub Copilot & AI-Assisted Coding. **About** VisioGen is building the future of AI-powered healthcare by developing human-verified clinical communication solutions for ophthalmology practices. We combine cutting-edge generative AI with clinical expertise to build scalable, production-ready applications that enhance patient engagement and improve healthcare delivery. We are looking for a full-stack developer, backend-focused, with **3+ years of experience in .NET Core, C#** , and modern backend development practices. The candidate should be able to code backend services, work with databases, and build APIs, with preferred experience on the React frontend as well. Hands-on experience with Docker, file upload and handling, network sockets, and SignalR is expected, along with a working understanding of unit testing and code coverage. Comfort using AI-assisted coding tools day to day is a key attribute. **What you'll do** - Design, develop, and maintain backend applications using .NET Core and C#. - Work with databases and build/maintain REST APIs. - Develop features involving file upload, processing, and secure file handling. - Build real-time communication solutions using SignalR and manage network socket programming as required. - Build integration with WhatsApp, Viber, KakaoTalk, SMS, Email, WeChat, Telegram, FBmessenger, Instagram, Voice, and similar channels using Infobip &/or Twilio SDKs & journeys. - Build secure and HIPAA-compliant integrations using webhooks, APIs, and FHIR with CRMs, EMRs/EHRs, and bespoke platforms. - Write unit, integration, and end-to-end tests using frameworks like xUnit, NUnit, or MSTest. - Implement and monitor code coverage using appropriate tools (e.g., Coverlet, dotCover). - Containerize applications and services using Docker, ensuring reliable builds and deployments across environments. - Code and enhance frontend features in React.js/TypeScript as needed. - Use AI-assisted coding tools (e.g., GitHub Copilot) as part of the regular development workflow, including for SDLC tasks beyond just code generation. - Proactively debug issues, analyze logs, and perform root cause analysis to resolve bugs or performance bottlenecks. - Collaborate with front-end developers, QA, DevOps, and product teams for timely and quality delivery. - Participate in code reviews and follow coding standards and best practices. **What we're looking for** - 3+ years of professional experience in .NET Core and C#. - Hands-on experience working with databases and building APIs. - Preferred real experience with React.js and JavaScript/TypeScript. - Working knowledge of network sockets and SignalR. - Proficiency in file upload, file I/O, and handling large/binary files. - Understanding unit testing, integration testing, and code coverage. - Hands-on experience with Docker. - Good knowledge of REST APIs, asynchronous programming, and dependency injection. - Well-versed in using AI tools (e.g., GitHub Copilot) for assistive coding and SDLC tasks. - Familiar with Git and version control workflows. - Experience with Entity Framework Core or other ORM tools.. - Experience with Infobip is preferred, along with hands-on integration experience with comparable channel/CPaaS platforms such as Twilio (SMS, WhatsApp, email APIs, and webhooks). - Experience with CI/CD pipelines. - Familiarity with cloud platforms like Azure. - Exposure to message queues such as Azure Service Bus. - Knowledge of log aggregation and monitoring tools. - Familiarity with CSS frameworks (Tailwind, Bootstrap) and Vite. - Familiarity with cloud platforms like Azure. - Knowledge of log aggregation and monitoring tools. - Strong communication and collaboration skills. - A team player who adapts quickly and works well in cross-functional teams. - Proactive in identifying issues, suggesting solutions, and driving them to closure. - Committed to quality, ownership, and continuous improvement. - Bachelor's degree in computer science, information technology, or a related field.