1,800,114open jobs
103,743companies
270,871added this week
Browse all
Salary
$100k – $213k per year
Location
Hybrid (Chantilly, United States)
Seniority
Senior · 10+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 17, 2026. First seen by Alion on Oct 16, 2026. Fantom Corporation scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Home About Benefits Contact Us Careers Home About Benefits Contact Us Careers About the Company Fantom Corporation provides high-end information technology (IT) services to federal and commercial clients, offering a wide range of capabilities for any project need.

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 Senior Software Engineer to support a mission-critical enterprise. This position serves as the principal authority for enterprise software architecture, development standards, application moderization, and secure software delivery across complex environments.

Responsibilities

  • Design, develop, test applications while establishing architectural frameworks.
  • Develop best practices and create modernization strategies
  • This role combines strategic technical leadership with hands-on engineering expertise to deliver scalable, secure and high performing solutions.

Required Qualifications

  • Must posses an active Top Secret Clearance
  • Must be willing and able to obtain a polygraph
  • Bachelor’s degree with 10+ years of relevant experience, or Master’s degree with less than 2 years of relevant experience
  • 10+ years of experience in application development, including test driven development.
  • 10+ years of experiene with Python.
  • 10+ years of experience across the software development life cycle.
Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
1,800,114 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Backend
Similar stack
Same company
Chantilly
Java Developer 1 hour ago
≈ $130k – $237k per year (Estimated) • In office • 5+ years exp • Bachelor's Degree • United States
JavaScript
AI/ML
Machine Learning
Frontend
Redux
React.js
DevOps
Rest API
CI/CD
AWS
Kubernetes
SOAP
Apply
C# WPF Developer 1 hour ago
≈ $122k – $223k per year (Estimated) • In office • 5+ years exp • United States
C#
C#
.NET
DevOps
Azure DevOps
Azure
Unix
Management
Scrum
Apply
$200k – $350k per year • In office • Full-Time • 3+ years exp • San Francisco
Python
AI/ML
AI Agents
Knowledge Graph
Apply
≈ $176k – $305k per year (Estimated) • Remote (LATAM) • Full-Time • 5+ years exp
Python
JavaScript
SQL
Databases
Supabase
AI/ML
LangChain
Embeddings
LLM
Hallucination
Reranking
LiveKit
Tool Use
Frontend
Next.js
React.js
Apply
$87k – $123k per year • In office • Full-Time • 8+ years exp • High School Diploma • Honolulu
Python
Java
PowerShell
DevOps
Terraform
CloudFormation
Azure
Windows Server
AWS
Incident Management
IAM
Linux
Windows
DNS
DHCP
VPN
Cybersecurity
Least Privilege
Microsoft Entra ID
Active Directory
PKI
Management
OneDrive
SharePoint
Apply
$176k – $282k per year • In office • TS/SCI • 16+ years exp • Master's Degree • Chantilly
Python
Java
TypeScript
SQL
C++
Databases
DynamoDB
ElasticSearch
DevOps
CloudFormation
Git
AWS
Docker
AWS Lambda
Amazon EC2
GitLab
Amazon S3
IAM
Amazon ECS
Amazon CloudWatch
API Gateway
Linux
Management
Agile
Apply
$146k – $234k per year • In office • TS/SCI • 10+ years exp • Chantilly
DevOps
AWS
Kubernetes
Service Mesh
GitLab
Management
ITSM
Apply
$150k – $230k per year • In office • Top Secret • Full-Time • Chantilly
Python
JavaScript
Java
TypeScript
SQL
Node JS
Java
Hibernate
Databases
OpenSearch
Frontend
Vue.js
Angular
DevOps
Ansible
Red Hat
Jenkins
Docker
Kubernetes
GitLab
Linux
Management
Agile
Apply
≈ $171k – $312k per year (Estimated) • Hybrid • Top Secret • Full-Time • 10+ years exp • Bachelor's Degree • Chantilly
Python
Python
Django
DevOps
Kubernetes
Apply
$128k – $189k per year • In office • TS/SCI • Full-Time • Bachelor's Degree • Chantilly • El Segundo
Management
Agile
Apply
See all jobs
This is one of many
1,800,114 more open roles from verified company boards, updated every day.