Role : Senior .
NET Full Stack Developer Technology : ASP.
NET, .
NET Core, React, Oracle Experience : 5-8 Years Work Location : HYD, Mumbai, India Job Summary We are seeking an experienced Senior .
NET Full Stack Developer to support, enhance, and modernize a portfolio of enterprise applications. The candidate will be responsible for maintaining applications built on ASP.
NET 4.8 and .
NET Core, supporting existing Windows Services, and driving UI modernization initiatives using React.js. The application landscape consists of 2 applications already migrated to .
NET Core and 2 applications currently running on ASP.
NET 4.8, which will be migrated over time. The role also involves supporting Oracle 19c databases, ARP Authentication, SpreadsheetGear-based Excel processing, AWS S3 file storage integrations, and day-to-day production support activities. The ideal candidate should possess strong development, troubleshooting, modernization, and support experience in enterprise application environments.

Key Responsibilities
Application Development & Modernization
- Develop, maintain, and enhance applications built on ASP.
NET 4.8, .
NET Core, and C#.
- Support and enhance 2 existing .
NET Core applications.
- Maintain and modernize 2 ASP.
NET 4.8 applications.
- Participate in migration initiatives from ASP.
NET 4.8 to React and .
NET Core architecture.
- Design and develop REST APIs, business services, and reusable components.
- Implement scalable, secure, and high-performance application solutions. Front-End Development
- Develop modern and responsive user interfaces using React.js.
- Convert existing ASP.




NET pages into React-based components.
- Work with JavaScript, TypeScript, HTML5, CSS3, and Bootstrap.
- Improve application usability, accessibility, and performance. Production Support
- Provide L2/L3 production support for business-critical applications.
- Investigate and resolve production issues within SLA timelines.
- Perform root cause analysis (RCA) and implement preventive measures.
- Analyze application logs, database issues, and integration failures.
- Support application releases, deployments, and post-deployment validation. Windows Services Support
- Support and enhance existing Windows Services.
- Troubleshoot service failures, scheduling issues, and processing bottlenecks.
- Ensure continuous availability and stability of batch processing services. Oracle Database Development
- Develop and maintain Oracle 19c database objects.
- Create and optimize Stored Procedures, Packages, Views, Functions, and Queries.
- Perform query optimization and database performance tuning.
- Support data correction and migration activities. Excel & Spreadsheet Processing
- Support SpreadsheetGear-based functionality.
- Maintain Excel import/export and transaction processing modules.




- Troubleshoot business-critical data upload and reporting issues.
- Support bulk data loading and file generation processes. Cloud & File Storage Integration
- Support integrations with AWS S3 file storage.
- Develop and maintain file upload, download, archival, and processing solutions.
- Troubleshoot cloud storage connectivity and file-processing issues. Security Compliance & Vulnerability Management
- Analyze and remediate findings from:
- Vulnerability Assessment (VA)
- Energetic Vulnerability Assessment (DVA)
- Security Scans
- Code Review Findings
- Work closely with Information Security teams to resolve security vulnerabilities.
- Ensure applications comply with organizational security and compliance standards.
- Perform security fixes and validation before production deployment. Source Control & DevOps
- Manage source code using Azure DevOps (ADO Repositories).
- Participate in code reviews and pull request processes.
- Support CI/CD pipelines and release activities.
- Follow enterprise development standards and branching strategies. Required Technical Skills Backend
- C#
- ASP.
NET MVC/Web Forms
- ASP.
NET Framework 4.8
- .
NET Core /.
NET 6+
- Entity Framework
- REST API Development
- Web API
- LINQ Frontend
- React.js
- JavaScript
- TypeScript
- HTML5
- CSS3
- Bootstrap Database
- Oracle 19c/Postgredsql
- SQL
- PL/SQL
- Query Optimization
- Performance Tuning Cloud & Integration
- AWS S3 File Storage Integration
- REST APIs
- JSON/XML Processing

📌 Dotnet Full stack developer (Mumbai)
🏢 Crisil
📍 Mumbai