Sr Software Engineer

Fantom Corporation; Chantilly (VA); On-site; USD 120,000 - 150,000; Full time

Job summary

Fantom Corporation in Chantilly, Virginia, is seeking a highly skilled Senior Software Engineer. This role requires strong full stack development experience and expertise in cloud technologies, DevOps, and systems integration. The engineer will lead software development efforts throughout the lifecycle, optimize system performance, and collaborate with teams on securing applications.

The ideal candidate will have a Bachelor’s degree and over 10 years of experience, including hands-on work in secure environments. This position offers opportunities for career growth while working alongside mission-focused professionals.

Qualifications

• 10+ years of software engineering or full stack development experience.
• Strong experience with at least two technologies: Python, Node.js, Angular, JavaScript, C#, SQL.
• Experience with cloud migration initiatives.

Responsibilities

• Lead software development through the full lifecycle.
• Support cloud migration and implement CI/CD pipelines.
• Monitor and optimize system performance.

Skills

Full stack development

Cloud technologies

DevOps practices

Systems integration

Troubleshooting and debugging

Education

Bachelor’s degree in Computer Science, Engineering, or related field

Tools

Python

Node.js

Angular

JavaScript

C#

SQL

Jira

Confluence

Splunk

Linux

Windows Server

Job description

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, DevOps, 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 DevOps 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 DevOps practices
• Experience with SQL and NoSQL 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