Senior .NET Full stack Devloper

Req  DATA strives to hire exceptional, innovative and passionate individuals who want to grow with us. If you want to be part of an inclusive, adaptable, and forward-thinking organization, apply now.

We are currently seeking a Senior .NET Full stack Devloper to join our team in Bala Cynwyd, Pennsylvania (US-PA), United States (US).

Position Title:

Senior .NET Full Stack Developer

Location:

Hybrid / Remote

Experience:

8+ Years

Role Overview We are seeking an experienced Senior .NET Full Stack Developer with strong expertise in API development, legacy application modernization, cloud technologies, and AI-assisted software engineering practices. The ideal candidate will be responsible for transforming legacy .NET Framework applications into modern, scalable, cloud-ready solutions while leveraging AI tools to accelerate development, testing, code quality, and productivity.

Key Responsibilities Full Stack Development Design, develop, and maintain enterprise-grade web applications using C#, ASP.NET MVC, ASP.NET Core, .NET Framework 4.x, .NET 6/7/8, and modern front-end frameworks.

Develop responsive and user-friendly applications using Angular, React, JavaScript, Type Script, HTML5, CSS3, and Bootstrap.

Implement scalable and maintainable architecture following industry best practices and coding standards.

API Development & Integration Design and develop RESTful APIs and microservices using ASP.NET Core.

Integrate applications with internal and external systems through APIs, messaging platforms, and service-oriented architectures.

Implement API security using OAuth2, OpenID Connect, JWT, Azure Entra  (Azure AD), and other authentication mechanisms.

Legacy Application Modernization Assess and analyze existing .NET Framework 4.x applications for modernization opportunities.

Migrate monolithic applications to modern .NET (6/7/8) architectures.

Refactor legacy code, eliminate technical debt, and improve application performance and maintainability.

Modernize authentication and authorization mechanisms to support cloud-native identity solutions.

Re-architect applications for containerization and cloud deployment on Azure.

Cloud & Dev Ops Develop  CI/CD pipelines using Azure Dev Ops and Git Hub Actions.

AI-Driven Development & Testing Leverage Git Hub Copilot, Azure OpenAI, Cursor AI, and AI-assisted development tools to improve development productivity.

Utilize AI for code generation, code reviews, refactoring, documentation, and unit test creation.

Implement AI-assisted automated testing strategies for functional, regression, and integration testing.

Evaluate and adopt emerging AI technologies to improve software delivery and engineering efficiency.

Establish best practices for responsible and secure use of AI in the software development lifecycle.

Quality & Engineering Excellence Develop comprehensive unit,  and end-to-end test suites.

Perform code reviews and enforce secure coding practices.

Optimize application performance, scalability, and reliability.

Collaborate with architects, product owners, QA teams, and business stakeholders to deliver high-quality solutions.

Required Qualifications Bachelor's degree in Computer Science, Information Technology, or related field.
8+ years of experience in software development using Microsoft technologies.

Strong expertise in:

C#ASP.NET   Framework  6/7/8

Entity Framework SQL Server Experience building RESTful APIs and microservices.

Hands-on experience modernizing legacy applications.

Strong understanding of software architecture patterns and design principles.

Experience with Azure cloud services and Dev Ops practices.

Experience with Git source control and Agile delivery methodologies.

Strong problem-solving and communication skills.

About NTT DATANTT DATA is a $30 billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world's leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. our consulting and Industry solutions help organizations and society move confidently and sustainably into the digital future.

As a Global Top Employer, we have experts in more than 50 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners. NTT DATA is a part of NTT Group, which invests over $3…