Full Stack Lead Developer - .Net/React.js
First seen by Alion on Oct 26, 2026.
Job Overview :
We are looking for an experienced Fullstack Lead Developer, backend-focused, with 4 - 6+ years of experience in .NET Core, C#, and modern backend development practices. The ideal candidate should be able to code backend services, work with databases, and build APIs, with strong preferred experience on the React frontend as well.
Key Responsibilities :
- Design, develop, and maintain scalable, secure, high-performance backend applications using .NET Core and C#.
- Work with databases and build/enhance/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 and/or Twilio SDKs and journeys.
- 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 standard development workflow.
- Proactively debug issues, analyze logs, and perform root cause analysis.
- Collaborate with front-end developers, QA, DevOps, and product teams.
- Participate in code reviews, design discussions, and guide the Developer-level engineer on the team.
Required Skills :
- 4 - 6+ years of professional experience in .NET Core and C#.
- Hands-on experience working with databases and building APIs.
- Strong, real experience with React.js and JavaScript/TypeScript.
- Solid experience with network sockets and SignalR.
- Proficiency in file upload, file I/O, and handling large/binary files securely.
- Deep understanding of unit testing, integration testing, and measuring code coverage.
- Strong hands-on experience in creating and managing Docker containers.
- Good knowledge of REST APIs, asynchronous programming, and dependency injection.
- Well-versed in using AI tools (e.g., GitHub Copilot) for assistive coding.
- Familiar with Git and version control workflows.
- Experience with Entity Framework Core or other ORM tools.
Educational Qualification :
- Bachelor's degree in Computer Science, Information Technology, or a related field.
Skills
Full Stack, .Net, C#, React.js, TypeScript, SignalR, RESTful API, Entity Framework, Unit Testing