Sr .Net Application Developer

1) The Contractor shall provide expert-level experience support to the Department of Health

and Human Services (HHS) Applications Team. Support includes application development,

modernization, enhancement, maintenance, requirements gathering, and technical

documentation for existing and legacy systems slated for replacement or upgrade.

Services will encompass multiple applications utilizing comparable technology stacks,

including but not limited to:

Direct Purchase Order (DPO): Process flows and associated workflows currently

executed via the HighGear low-code/no-code platform.

Contract Management: Process flows and workflows associated with the agency

contract tracking system.

Process flows and workflows associated with HR tracking system

Process flows and workflows associated with Contract Actions such as

a. New contracts

b. Solicitations

All Current Request Types (e.g. inflationary adjustments, budget modifications,

Liquidate POs, Changes to Funding codes, etc.

a) Application Development: Minimum 7 years of experience developing modern .NET

Web Applications and Web APIs.

b) Application Maintenance: Minimum 7 years of experience maintaining .NET Web

Applications utilizing MVC, Clean, architecture.

c) Database Administration & Engineering: Minimum 7 years of experience with

Microsoft SQL Server and Oracle database administration, coding, integration, and

reporting.

d) Programming Languages: Proficiency in VB.NET, C#, Blazor, React, .NET, HTML,

and SQL.

e) Data Management: Demonstrated expertise in mapping and migrating data between

disparate database systems to Microsoft SQL Server.

f) Requirements Engineering: Proven ability to translate user enhancement requests into

functional requirements, system designs, and production-ready implementations.

g) Identity & Access Management: Experience in integrating applications with Single

Sign-On (SSO) and Microsoft Entra ID (formerly Azure AD).

h) AI Integration: Demonstrated Experience with leveraging AI tools (such as Microsoft

Copilot) safely, securely, and in compliance with organizational policies.

i) DevOps & Deployment: Experience publishing .NET deployment packages across

Development (DEV), Testing (TEST), and Production (PROD) environments.

j) 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.

k) Project Governance: Demonstrated Experience working and collaborating within

structured project environments alongside an assigned Project Manager.

System One is a leading provider of specialized, highly technical services and solutions to critical infrastructure, technology, life sciences, and government sectors. We partner with large private and public organizations who trust us to execute their complex, mission-critical initiatives through our outsourced services and workforce solutions.