Senior Software Engineer Chantilly, Virginia Clearance TS/SCI Full Scope Poly

The Josef Group; Chantilly (VA); On-site; USD 250,000 - 260,000; Full time

Job summary

A leading technology firm is seeking a Senior Software Engineer to design and operate cloud-native systems. This role demands expert-level Python experience and strong skills in AWS, particularly with services like Lambda and EC2. The successful candidate will architect and deploy AWS solutions while ensuring system reliability and automation. This position is based in Chantilly, VA and requires working in a classified environment, offering a competitive salary between $250,000 and $260,000.

Qualifications

• Bachelor's degree in a technical field is required.
• Expert-level Python programming skills necessary.
• Strong experience with AWS services required.

Responsibilities

• Design and maintain production-grade Python services.
• Architect and deploy AWS-based cloud solutions.
• Manage Infrastructure as Code using Terraform.
• Integrate RESTful APIs and event-driven architectures.

Skills

Expert-level Python experience

AWS services (Lambda, EC2, S3, DynamoDB)

Strong Terraform experience

Strong Linux/UNIX experience

Experience with containers and Docker

Education

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

Tools

Terraform

AWS

HTTP REST APIs

Job description

Senior Software Engineer (Python / AWS / Terraform)

Location: Onsite – Chantilly, VA
Clearance: TS/SCI and Poly Required
Compensation: $250,000–$260,000 base salary

Overview

We are seeking a Senior Software Engineer to design, build, and operate highly scalable cloud-native systems supporting mission‑critical national security programs. This role is ideal for an experienced engineer who thrives in hands‑on development, infrastructure automation, and modern AWS‑based architectures.

You will work onsite in Chantilly, VA alongside a highly technical team delivering secure, resilient, and high‑performance solutions in a classified environment.

Key Responsibilities

• Design, develop, and maintain production‑grade Python services supporting backend systems and APIs
• Architect and deploy AWS‑based cloud solutions, leveraging serverless and managed services
• Build and maintain Infrastructure as Code (IaC) using Terraform across multiple environments
• Develop and integrate RESTful APIs and event‑driven architectures
• Implement cloud‑native patterns for scalability, availability, observability, and fault tolerance
• Collaborate with cross‑functional engineering teams to deliver secure, reliable solutions
• Support CI/CD pipelines and automate deployment workflows
• Troubleshoot, optimize, and enhance system performance in Linux‑based environments

Required Qualifications

• Bachelor’s degree in Computer Science, Engineering, or a related technical field
• Expert‑level Python experience (this is the core language for the role)
• Strong hands‑on experience with AWS, including services such as:
  • Lambda, EC2, S3, DynamoDB
  • EventBridge, Step Functions
  • IAM, Organizations, CloudWatch
• Strong Terraform experience managing complex, production AWS infrastructure
• Experience building and consuming HTTP REST APIs
• Strong Linux/UNIX experience
• Experience with containers and Docker
• Familiarity with distributed systems, cloud networking, and security best practices

Nice‑to‑Have Skills

• Serverless architecture experience at scale
• Experience working in classified or regulated environments
• Exposure to global scaling, load balancing, and high‑availability architectures
• CI/CD tooling experience (e.g., Jenkins, GitLab CI, ArgoCD)