Sr Software Engineer Job Chantilly area,Virginia USA,Software Development

Fantom Corporation is a mission-focused organization supporting critical programs across the defense and intelligence community. We partner with our customers to deliver high-impact technical solutions while fostering a culture built on trust, expertise, and long-term career growth.

We are seeking a highly skilled Senior Software Engineer with strong full stack development experience and a passion for solving complex technical challenges. The ideal candidate will have expertise in cloud technologies, Dev Ops, systems integration, and modern software engineering practices, along with the ability to support the migration and modernization of legacy platforms into scalable cloud-based architectures.

Responsibilities

Lead software development efforts across the full software development lifecycle, including requirements analysis, design, development, deployment, and maintenance
Design and develop scalable software solutions using technologies such as Python, Node.js, Angular, JavaScript, C#, SQL Server, Windows Server, and Linux
Support cloud migration initiatives and implement modern CI/CD pipelines and Dev Ops practices
Monitor, troubleshoot, and optimize system performance using tools such as Splunk, Grafana, and Prometheus
Utilize Jira and Confluence to support Agile project management and team collaboration
Produce and maintain technical documentation including system designs, Interface Control Documents (ICDs), architecture diagrams, and operational procedures
Collaborate with engineering teams to reverse engineer legacy applications and develop UML models and modernization strategies
Support secure communications systems and ensure compliance with operational and security requirements
Research, prototype, and recommend improvements to system architectures and software solutions
Troubleshoot and resolve complex application, infrastructure, and performance issues
Evaluate and adopt emerging technologies to improve system efficiency, scalability, and maintainability

Required Qualifications

Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience)
10+ years of software engineering or full stack development experience
Strong experience with at least two of the following technologies:
Python, Node.js, Angular, JavaScript, C#, SQL
Experience working in Linux and Windows server environments
Experience with cloud technologies and cloud migration initiatives
Experience implementing and supporting CI/CD pipelines and Dev Ops practices
Experience with SQL and No

SQL databases
Experience with Jira, Confluence, Splunk, and diagramming/documentation tools
Strong troubleshooting, debugging, and performance optimization skills
Experience monitoring and supporting critical systems in secure environments
Hands‑on experience with systems integration, secure systems engineering, and reverse engineering

Desired Qualifications

Experience modernizing legacy applications and infrastructure
Experience supporting enterprise‑scale secure communications systems
Familiarity with Agile software development methodologies
Experience developing UML models and architecture documentation
Strong written and verbal communication skills with the ability to work across technical and non‑technical teams
Experience researching and implementing emerging technologies in operational environments

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