Senior .NET Developer

Senior.NET DeveloperNTT 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 Developer to join our team in Rockville, Maryland (US-MD), United States (US).NTT DATA is seeking a highly skilled Senior .NET Developer to support mission-critical modernization and application development efforts. This role blends advanced engineering expertise with architectural insight and cross-team collaboration. You will build high-performance.NET applications, guide integration across systems, provide technical leadership, and deliver solutions impacting federal scientific and administrative communities.Core Engineering & ArchitectureDesign and develop new features using C#, ASP.NET MVC,.NET Core, and modern architecture patterns.Translate business needs into technical requirements and end-to-end solution designs.Build scalable, secure, high-performance enterprise applications.Provide technical leadership across multiple systems and integration layers.Lifecycle Delivery & Team CollaborationSupport full SDLC: design, development, testing, deployment, and sustainment.Maintain and modernize existing applications while supporting new enhancements.Work across cross-functional teams including product owners, QA specialists, and business stakeholders.Manage backlog items including new features, bug fixes, and modernization work.Modernization, Cloud & DevOpsContribute to migration toward cloud-native architectures in Azure.Support CI/CD pipelines, secure deployments, and engineering best practices.Integrate AI-assisted tools (GitHub Copilot, OpenAI Codex) to enhance development quality and velocity.Leadership & QualityMentor junior developers and contribute to code reviews and architecture reviews.Ensure adherence to coding standards, documentation rigor, testing frameworks, and secure SDLC practices.Troubleshoot complex issues spanning UI, backend, and distributed systems.Basic QualificationsMinimum 6 years of experience designing, developing, and deploying applications using C#, ASP.NET MVC,.NET Core.Minimum 6 years of experience with SQL Server, JavaScript frameworks, and enterprise integration patterns.Minimum 6 years of experience with Agile/SCRUM development and version control (Git, TFS).Ability to obtain/maintain a Public Trust Clearance.Preferred QualificationsBachelors degreeExperience with React/Angular/Vue.js.Experience with BDD, Windows Workflow Foundation, and microservices patterns.DevOps experience including CI/CD, automated testing, and Docker/Kubernetes.Experience with AI/ML integration, Azure Cognitive Services, or API-driven data platforms.Excellent communication, customer-facing interaction, and cross-team problem-solving skills.NTT DATA provides a reasonable range of compensation for specific roles. The starting pay range for this role is $106,480 - $159,720. Actual compensation will depend on a number of factors, including the candidate's relevant experience, technical skills, and other qualifications. This position may also be eligible for incentive compensation based on individual and/or company performance. If the position offered in temporary, the position will not be eligible for incentive compensation. This position is eligible for company benefits including medical, dental, and vision insurance with an employer contribution, flexible spending or health savings account, life and AD&D insurance, short and long term disability coverage, paid time off, employee assistance, participation in a 401k program with company match, and additional voluntary or legally-required benefits.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 billion each year in R&D.