Sr. Full Stack .NET Developer with SQL Server + Oracle
Rockville, Maryland
Experience: 0
Category: Information Technology
Contractor Work Model: Hybrid
Brand: System One
Compensation Range: 50.00 - 100.00 Per Hour
Job ID: 383188
Date Posted: 11/09/2026
Shortcut: http://jobs.systemone.com/m0qnwg
Job Title: Sr. Full Stack .NET Developer with SQL Server + Oracle
Location: Rockville, Maryland
Type: Contract, long term
Compensation: W-2 or C2C negotiable
Work Model: Hybrid
Security Clearance: No Clearance is required
ALL RESIDENCY STATUS ARE ELIGIBLE TO APPLY
Responsibilities
- Support application development, modernization, enhancement, maintenance, requirements gathering, and technical documentation for existing and legacy systems slated for replacement or upgrade.
- Support multiple applications utilizing comparable technology stacks, including but not limited to Direct Purchase Order (DPO) process flows and associated workflows executed via the HighGear low-code/no-code platform.
- Support Contract Management process flows and workflows associated with the agency contract tracking system.
- Support process flows and workflows associated with HR tracking system.
- Support process flows and workflows associated with Contract Actions such as New contracts, Solicitations, and all current request types (e.g. inflationary adjustments, budget modifications, Liquidate POs, Changes to Funding codes, etc.).
- Work and collaborate within structured project environments alongside an assigned Project Manager.
- Work side by side with a DHHS/County assigned Project Manager throughout the project life cycle to ensure project life cycle transparency to all associated stakeholders.
- Support project metrics, active knowledge transfer, documentation of business processes, and long-term maintainability of delivered solutions.
Requirements
- Master of Science (MS) degree in a computer-related field.
- Application Development: Minimum 7 years of experience developing modern .NET Web Applications and Web APIs.
- Application Maintenance: Minimum 7 years of experience maintaining .NET Web Applications utilizing MVC, Clean, architecture.
- Database Administration & Engineering: Minimum 7 years of experience with Microsoft SQL Server and Oracle database administration, coding, integration, and reporting.
- Programming Languages: Proficiency in VB.NET, C#, Blazor, React, .NET, HTML, and SQL.
- Data Management: Demonstrated expertise in mapping and migrating data between disparate database systems to Microsoft SQL Server.
- Engineering: Proven ability to translate user enhancement requests into functional requirements, system designs, and production-ready implementations.
- Identity & Access Management: Experience in integrating applications with Single Sign-On (SSO) and Microsoft Entra ID (formerly Azure AD).
- AI Integration: Demonstrated Experience with leveraging AI tools (such as Microsoft Copilot) safely, securely, and in compliance with organizational policies.
- DevOps & Deployment: Experience publishing .NET deployment packages across Development (DEV), Testing (TEST), and Production (PROD) environments.
- UI/UX & Design: Minimum 7 years of experience applying responsive design principles and executing UI/UX best practices. Accessible UI that are at least WCAG 2.1 AA compliant.
System One, and its subsidiaries including Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
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⚠️ Protecting Job Seekers from Identity Scams
At System One, your privacy and security are important to us. As job-related scams continue to target job seekers, we want to help you recognize and avoid common recruitment fraud. Identity theft scams often involve individuals, also known as "scammers," posing as recruiters or employers to obtain sensitive personal information, such as Social Security numbers, bank account details, or copies of driver’s licenses, with the goal of stealing identities, accessing financial accounts, or creating fraudulent accounts in a victim’s name.