Senior .NET Developer

Req ID: 394765 NTT 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). Job Summary: 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. Job Duties: Core Engineering & Architecture Design and develop new features using C#, 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 Collaboration Support 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 & DevOps Contribute 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 & Quality Mentor 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 Qualifications: Minimum 6 years of experience designing, developing, and deploying applications using C#, 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 Qualifications: Bachelors degree Experience 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 DATA NTT 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. Whenever possible, we hire locally to NTT DATA offices or client sites. This ensures we can provide timely and effective support tailored to each client’s needs. While many positions offer remote or hybrid work options, these arrangements are subject to change based on client requirements. For employees near an NTT DATA office or client site, in-office attendance may be required for meetings or events, depending on business needs. At NTT DATA, we are committed to staying flexible and meeting the evolving needs of both our clients and employees. NTT DATA recruiters will never ask for payment or banking information and will only use @nttdata.com, @nttdatafed.com and @talent.nttdataservices.com email addresses. If you are requested to provide payment or disclose banking information, please submit a contact us form, . NTT DATA endeavors to make accessible to any and all users. If you would like to contact us regarding the accessibility of our website or need assistance completing the application process, please contact us at . This contact information is for accommodation requests only and cannot be used to inquire about the status of applications. NTT DATA is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status. For our EEO Policy Statement, please click here . If you'd like more information on your EEO rights under the law, please click here . For Pay Transparency information, please click here .