Senior Backend Engineer - API & Distributed Systems

Agile Defense, Inc.; Arlington (VA); Hybrid; USD 98,000 - 115,000; Full time

Job summary

Agile Defense in Rosslyn, VA is seeking a Senior Software Engineer to build distributed backend services and durable APIs within a Hub‑and‑Spoke architecture. You will contribute to development and supporting tools, writing clean, maintainable code under guidance of senior engineers.

Design, develop, and maintain backend microservices that support enterprise AI operations. Onsite twice a week in Rosslyn with a salary range of $98,000–$115,000 per year.

Qualifications

• Secret clearance required and must be able to obtain/start.
• Hands-on experience with Java and Spring Boot.
• Designing and implementing RESTful APIs.
• Proficiency with core AWS services.

Responsibilities

• Implement API endpoints and business logic for wrapper service
• Develop features for OpenFGA data model management
• Write unit tests and integration tests
• Debug and resolve software defects
• Assist with documentation and code examples
• Participate in code reviews and team ceremonies
• Support onboarding team with technical questions
• Contribute to CI/CD pipeline improvements

Skills

Secret Clearance

Java and Spring Boot

RESTful APIs

AWS services

Education

High School Diploma

Tools

Django

NATS

Kafka

Redis

ClickHouse

OpenTelemetry

OpenRouter

LiteLLM

OpenFGA

Job description

Agile Defense in Rosslyn, VA is seeking a Senior Software Engineer to build distributed backend services and durable APIs within a Hub‑and‑Spoke architecture. You will contribute to development and supporting tools, writing clean, maintainable code under guidance of senior engineers.

Design, develop, and maintain backend microservices that support enterprise AI operations. Onsite twice a week in Rosslyn with a salary range of $98,000–$115,000 per year.