.NET Systems Architect / Developer

Arena Technical Resources, LLC (ATR); Town of Charleston (NY); On-site; USD 110,000 - 120,000; Full time

Benefits offered by this job

Benefits

401k

PTO

Job summary

Arena Technical Resources, LLC (ATR) is seeking a Senior .NET Systems Architect / Developer to support a federal program in a legacy environment. The role emphasizes modernization, data integration, and reliability across platforms.

The candidate should have .NET/C# expertise, experience with COBOL/mainframe contexts, and ability to collaborate with federal staff and vendors to ensure continuity of operations. Top Secret clearance is required.

Qualifications

• 5–8+ years of software development and/or system architecture experience.
• Proficiency with .NET Framework / .NET Core and C# development.
• Experience with data integration, data movement, or ETL processes.
• Familiarity with COBOL or mainframe environments.

Responsibilities

• Develop and maintain .NET/C# applications within a legacy system environment using Visual Studio.
• Stabilize development and production environments and coordinate deployments with stakeholders.
• Design data movement and integration across legacy systems, databases, and modern tools.
• Analyze existing systems (including COBOL/mainframe components) and recommend performance improvements.
• Support data modeling and ETL processes for reliable data flow.
• Collaborate with federal staff, vendors, and internal teams for continuity of operations.
• Contribute to system and network architecture discussions, including connectivity and performance considerations.
• Evaluate modern tools to enhance data processing and analytics capabilities.
• Identify opportunities to improve efficiency and scalability within existing constraints.
• Assist with documentation and knowledge transfer.

Skills

.NET Framework / .NET Core

C# development

Microsoft Visual Studio development

Oracle / MS SQL

Data integration / ETL

Education

Bachelor’s degree in Computer Science, Information Systems, Engineering, or equivalent experience

Tools

Microsoft Visual Studio

Job description

Job Title: .NET Systems Architect / Developer

Job Location: Charleston, South Carolina – Onsite

Compensation: $110,000 to $120,000 base salary, benefits, 401k, PTO, etc.

Eligibility/Clearance: Top Secret Clearance required. This opportunity supports a government contract.

Job Description

We are seeking an experienced Senior.NET Systems Architect / Developer to support a federal program operating within a legacy technology environment while supporting ongoing system enhancements and integration efforts. This role focuses on maintaining, enhancing, and stabilizing existing systems while contributing to incremental improvements in system architecture, data integration, and development processes.

The ideal candidate will have strong experience in .NET/C# development, familiarity with legacy systems, and a demonstrated ability to support data movement and integration across multiple platforms. This role will also contribute to improving development and deployment workflows, including supporting environment setup and system interoperability.

Responsibilities

• Support development and maintenance of .NET/C# applications within a legacy system environment using Microsoft Visual Studio.
• Assist with establishing and stabilizing development and production environments, including coordination with stakeholders to address setup, configuration, and deployment challenges.
• Design and implement data movement and integration solutions across diverse platforms (legacy systems, databases, and modern tools).
• Analyze existing systems (including COBOL or mainframe components) and recommend practical enhancements to improve performance, reliability, and maintainability.
• Support data modeling and ETL processes to ensure consistent and reliable data flow.
• Collaborate with federal staff, vendors, and internal teams to support continuity of operations and technical alignment.
• Contribute to system and network architecture discussions, including connectivity and performance considerations.
• Support evaluation and application of modern tools and technologies, where appropriate, to enhance data processing and analytics capabilities.
• Identify opportunities to improve efficiency and scalability within existing system constraints.
• Assist with documentation, knowledge transfer, and system continuity efforts.

Requirements

• Strong experience with:
  • .NET Framework / .NET Core
  • C# development
  • Microsoft Visual Studio development environments
  • Oracle and/or Microsoft SQL Server (MS SQL)
• Experience with data integration, data movement, or ETL processes.
• 5–8+ years of experience in software development and/or system architecture.
• Familiarity with legacy systems, including COBOL or mainframe environments.
• Experience troubleshooting and supporting development and deployment environments.
• Understanding of system integration and distributed systems.
• Strong communication and collaboration skills.

Preferred

• Experience working in federal or highly regulated environments.
• Familiarity with modern data platforms, including Databricks or similar technologies (desired for future-state capabilities).
• Experience with data modeling and database design.
• Exposure to cloud platforms (Azure, AWS, or similar).
• Basic understanding of network architecture and system connectivity.
• Exposure to AI/ML or advanced analytics tools.

Certifications (Preferred)

• CompTIA Security+ (or equivalent baseline certification)
• CompTIA Network+
• Microsoft Certified: Azure Fundamentals or Azure Solutions Architect
• Databricks Data Engineer Certification (desired)
• ITIL Foundation Certification

Education

• Bachelor’s degree in Computer Science, Information Systems, Engineering, or equivalent experience.

ATR is an Equal Opportunity Employer (EOE) who will provide equal employment opportunity to employees and applicants for employment without regard to race, ethnicity, religion, color, sex, pregnancy, national origin, age, veteran status, ancestry, sexual orientation, gender identity or expression, marital status, family structure, genetic information, or mental or physical disability.