Demo

Senior Application Developer

Diversified Systems.com
Harrisburg, PA Full Time
POSTED ON 4/21/2026
AVAILABLE BEFORE 5/20/2026
Fully Remote

Description:

Diversified Systems is searching for a Senior Application Developer to assist with CLEAN project and who will some of the responsibilities listed below.

Responsibilities:

  • IT expertise in development and support of large, complex, mission critical, enterprise software systems.
  • Provide a highly stable and supportable environment improving all aspects of the Enterprise system.
  • Provide ongoing assessment of the operational state of the network, compute, and security operations and drive continuous improvements.
  • Continuously evaluate the evolving needs of the Enterprise systems and ensure sufficient capacity is planned and in place to meet the needs of the agencies and customers.
  • Lead the identification and mitigation of risks, troubleshoot, and provide resolution to complex end-to-end scenarios involving multiple external agencies, products, protocols, networks, and technology stacks.
  • Develop and document standards, policies, processes, roles, and responsibilities to support the operations.
  • XML Schema Mastery: Expert-level proficiency in XSD (XML Schema Definition), including the ability to navigate and extend the NIEM core and individual justice domain schema.
  • Transformation Logic: Extensive experience with XSLT 2.0/3.0 and XPath for mapping legacy GJXDM elements to their corresponding NIEM components.
  • Tooling Proficiency: Hands-on experience with NIEM-specific tools such as Altova XMLSpy for schema management.
  • Maintain and enhance documentation of architecture, infrastructure, and system troubleshooting methods.
  • Develop, measure, and maintain KPIs for the core network, compute, and security operations and supporting reports, dashboards, and executive summaries.

Requirements:

  • 4-year college degree.
  • Broad experience in software development including coding, testing, deployment and maintenance of applications developed on Microsoft stack.
  • 6 years: .NET Framework (1.196a04.6.x).
  • 5 years: ASP.NET.
  • 5 years: C#.
  • 5 years: WCF Web Services.
  • 5 years: Object Oriented Development.
  • 5 years: MS SQL Server.
  • 5 years: Visual Studio.
  • 5 years: Experience maintaining and extending technical documentation.
  • 5 years: Understanding and working experience with Microsoft SQL Server.
  • 3 years: IEPD Lifecycle Managementa0 proven track record of developing and documenting IEPD according to the NIEM specification.
  • 3 years: ESB Migrationa0 refactoring custom client interfaces and web services (SOAP/REST) to consume NIEM-conformant messages without breaking downstream consumers.
  • 3 years: Namespace Managementa0 ability to manage XML namespaces and versioning strategies to ensure backward compatibility during a multi-phased migration.
  • 2 years: .NET Core.
  • 2 years: Web API.
  • After-hours support.
  • Experience with Azure.

Other Requirements:

  • Understanding of OO concepts and design patterns.
  • Good understanding of TFS, build and deployment process.
  • Problem solving and critical thinking.
  • Must be able to work independently.
  • Can communicate effectively with multiple team members at a given time.
  • Strong team-building, vendor and customer relations skills.

About Diversified Systems

Founded in 1990, Diversified Systems is an award-winning Technology Services corporation providing all levels of IT project consulting services nationwide. DSI is headquartered in Columbus, Ohio with regional offices in the American Midwest and East Coast. We offer our consultants a number of flexible and competitive compensation benefit packages.

Diversified Systems is committed to the principles of equal employment. We are committed to complying with all federal, state, and local laws providing equal employment opportunities, and all other employment laws and regulations.

Diversity, Equity and Inclusion

DSI values authenticity and is committed to making sure our employees and partners are valued and respected. At DSI, we believe building a diverse culture is important because we know when people work together, we can achieve better results as a team. DSI realizes that everyone comes from various backgrounds. We celebrate these differences because our employees are our greatest asset as we strive to best meet the needs of those we serve. As part of our ongoing efforts, DSI is focused on advancing equality, diversity, and inclusion by setting high standards to continually evolve our culture. This includes but is not limited to recruiting, community involvement, client delivery, and career development.

Salary.com Estimation for Senior Application Developer in Harrisburg, PA
$108,521 to $134,030
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