Junior .NET Developer – Tier 3 O&M Support

Xfinion Inc. is seeking a Junior .NET Developer to provide Tier 3 Operations & Maintenance (O&M) support for a commercial software product under a federal contract. This role is critical in resolving complex technical issues escalated beyond Tier 1 and Tier 2 support (handled by the customer), focusing on identifying and fixing code-level defects and collaborating with internal development teams for deeper escalations.

Key Responsibilities:

• Triage and resolve Tier 3 support tickets related to application bugs, performance issues, and integration errors to meet SLA targets.
• Analyze and debug .NET code to identify root causes of issues.
• Collaborate with internal development teams to escalate and resolve complex problems.
• Document solutions, workarounds, and technical findings for knowledge base updates.
• Work within the ServiceNow ticketing system to manage and track support cases.
• Participate in code reviews and contribute to continuous improvement of support processes.
• Ensure compliance with security and operational standards required by the contract.

Required Qualifications:

• Active Secret Clearance.
• 1–3 years of experience in software development using .NET (C#).
• Familiarity with ASP.NET, Web APIs, and SQL Server.
• Experience troubleshooting and debugging production applications.
• Understanding of software development lifecycle (SDLC) and Agile methodologies.
• Strong problem-solving and communication skills.

Preferred Qualifications:

• Experience providing help desk or technical support, especially in a Tier 2 or Tier 3 capacity.
• Familiarity with ServiceNow or similar ITSM platforms.
• Exposure to DevOps practices and tools (CI/CD pipelines, version control, etc.).
• Experience working in a federal or government contracting environment.
• Experience with escalating Tier 3-4 hardware support

Location: Remote with periodic travel to office and Portsmouth, NH (1-2 times annually)

Contract Type: Full-Time – Contract Support

Duty Hours: M-F, 8:00am - 5:00pm. Phone availability for customer escalation after hours is indicated.

Job Types: Full-time, Contract

Pay: $75,000.00 - $85,000.00 per year

Benefits:

• 401(k)
• Dental insurance
• Employee assistance program
• Health insurance
• Health savings account
• Life insurance
• Paid time off
• Professional development assistance
• Referral program
• Tuition reimbursement
• Vision insurance

Application Question(s):

• Available to commute to Portsmouth, NH (1-2 times annually)?

Security clearance:

• Secret (Required)

Ability to Commute:

• Arlington, VA 22209 (Required)

Work Location: Hybrid remote in Arlington, VA 22209