Senior .Net Application Developer

Assyst is seeking a Senior .NET Application Developer to support the development, modernization, enhancement and maintenance of enterprise web applications and workflow solutions. The ideal candidate must have strong experience in .NET application development, database engineering, system integration, and UI/UX design, along with the ability to translate business requirements into production-ready solutions. Experience with legacy application modernization, HighGear workflow platforms, and government projects is preferred.

Job Title: Senior .NET Application Developer – Process & Workflow Applications

Location: Rockville, MD

Assyst is seeking a Senior .NET Application Developer to support the development, modernization, enhancement, and maintenance of enterprise web applications and workflow solutions. The ideal candidate must have strong experience in .NET application development, database engineering, system integration, and UI/UX design, along with the ability to translate business requirements into production-ready solutions. Experience with legacy application modernization, HighGear workflow platforms, and government projects is preferred.

Roles & Responsibilities

• Design, develop, enhance, modernize, and maintain .NET web applications and Web APIs.
• Maintain existing applications built using MVC and Clean Architecture.
• Support process flows and workflow applications currently implemented through the HighGear low-code/no-code platform.
• Gather and translate user enhancement requests into functional requirements, technical designs, and production-ready solutions.
• Perform database administration, development, integration, reporting, and data migration using Microsoft SQL Server and Oracle.
• Map and migrate data from disparate database systems into Microsoft SQL Server.
• Develop and integrate applications using VB.NET, C#, Blazor, React, .NET, HTML, and SQL.
• Implement SSO and Microsoft Entra ID (Azure AD) integrations.
• Develop responsive and accessible user interfaces compliant with WCAG 2.1 AA standards.
• Utilize AI-assisted development tools such as Microsoft Copilot in accordance with organizational security and compliance policies.
• Prepare and deploy .NET application packages across DEV, TEST, and PROD environments.
• Develop SQL scripts for database requests and maintain technical, functional, and release documentation.
• Collaborate with Project Managers and technical teams within structured project governance environments.

Required Skills & Qualifications

• Master's degree (MS) in Computer Science, Information Technology, or a related computer field.
• Experience in .NET web application and Web API development.
• Experience maintaining .NET applications using MVC and Clean Architecture.
• Experience with Microsoft SQL Server and Oracle database administration, coding, integration, and reporting.
• Strong proficiency in VB.NET, C#, .NET, Blazor, React, HTML, and SQL.
• Experience in database engineering, data mapping, and migration across different database systems.
• Experience in requirements engineering, system design, and application enhancement.
• Hands-on experience with SSO and Microsoft Entra ID (Azure AD) integration.
• Experience with AI tools such as Microsoft Copilot.
• Experience with .NET deployments across Development, Testing, and Production environments.
• Strong knowledge of responsive UI/UX design and WCAG 2.1 AA accessibility standards.
• Excellent technical documentation skills.
• Experience working in structured project environments and collaborating with Project Managers.
• Previous government or public-sector project experience is preferred.

ASSYST is an Equal Opportunity Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, disability, military status, national origin or any other characteristic protected under federal, state, or applicable local law.

Skills

Application Programming Interface (API), Artificial Intelligence (AI), Business Skills, Computer Science, Data Mapping, Data Migration, Database Administration, Database Programming, Database Technology, Documentation, Government, HTML (HyperText Markup Language), Information Technology & Information Systems, Internet Application, Microsoft .NET, Microsoft C# (C Sharp), Microsoft Product Family, Microsoft SQL Server, Microsoft SQL Server DBA (Database Administration), Microsoft Visual Basic.NET, Microsoft Windows Azure, Oracle Database, Process Flow, Product Testing, Production Systems, Programming Tools, Requirements Management, SQL (Structured Query Language), SQL Databases, Scripting (Scripting Languages), Single Sign-On (SSO), Software Administration, Software Design, Software Development, System Integration (SI), System Migration, Team Player, Technical Writing, Technical/Engineering Design, Test Plan/Schedule, User Experience Design (UXD), User Interface Design, User Interface/Experience (UI/UX), Web Content Accessibility Guidelines (WCAG)

ASSYST, Inc.

ASSYST is an agile, CMMI Level 3 certified firm that excels at simplifying IT and business processes, removing unnecessary redundancy, and delivering targeted information for faster, smarter decisions to improve operations and productivity. We work closely with stakeholders, cross-functional teams, and other technology and services vendors to develop solutions utilizing rigorous adherence to the CMMI-based processes, Agile Framework (Scrum and SAFe), ITSM/ITIL services model, and ISO standards to achieve consistent process improvement. ASSYST represents a balanced approach to providing continuity of service while evoking innovation, fresh ideas, and practices to actualize modernization initiatives. We work collaboratively with customers and partners on human-centered design, leverage emerging technologies, apply innovation to deliver solution outcomes that improve productivity, user experience, and customer delight.

Our specialties include: Big Data and Analytics, Enterprise Content Management, Information Assurance, Cloud Computing, Knowledge Management, Automation, DoD IT Services, Cybersecurity, Test Engineering, FHIR, HealthIT, Data Science, Azure, Agile, Digital Services, AWS GovCloud, ERP, and SAFe

Company Size

100 to 499 employees

Industry

Computer/IT Services

1993

Website

https://www.assyst.net/