Senior Full Stack Engineer

About Agile Defense

At Agile Defense we know that action defines the outcome and new challenges require new solutions. That’s why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next.

Our vision is to bring adaptive innovation to support our nation's most important missions through the seamless integration of advanced technologies, elite minds, and unparalleled agility—leveraging a foundation of speed, flexibility, and ingenuity to strengthen and protect our nation’s vital interests.

Job Description

We are seeking a Senior Full Stack Engineer to join the Workforce engineering team, an AI-enabled application platform focused on secure, user-centered workflows, enterprise integrations, and cloud-native delivery. This is a hands-on role: the ideal candidate will spend 50%+ of their time actively designing, coding, reviewing, and shipping software while also leading technical execution for a small team. Responsibilities include building full stack features across modern web front ends and backend APIs, defining application architecture and API contracts, contributing to AI-enabled capabilities (tool calling, prompt/control flow, context management, LLM integration), supporting secure enterprise integrations, and mentoring engineers through code review and pairing. This is not a pure architecture or management role — the person must remain hands-on.

Education and Background

Candidate should have a strong professional background in software engineering with demonstrated ability to design and implement production-grade application architecture across front-end, backend, data, and integration layers. Practical, applied experience is prioritized over formal credentials.

Years of Experience

7+ years

Required Skills

• Strong hands-on coding in a typed OOP language (Java, C#, TypeScript, Go, Kotlin, or similar)
• Professional experience building both modern front-end apps and backend APIs/services
• Proven ability to design production-grade architecture across front-end, backend, data, and integration layers
• Skilled at breaking down complex requirements into implementation plans and technical docs
• Experience leading technical work for a small team or owning a major feature area

Solid grasp of API design, auth patterns, data modeling, error handling, and testing

• Able to ramp up in a large/complex codebase with minimal direction
• Practical security knowledge: access control, data protection, dependency hygiene, production readiness
• Strong communication skills for explaining tradeoffs to engineers and stakeholders
• Familiarity with AI application patterns: tool calling, prompt/control flow, context management, safe handling of model I/O

Preferred Skills

• TypeScript, Node.js, React
• SaaS, enterprise, government, or secure internal platform experience
• Microservices, containerized/cloud-native architecture, CI/CD
• Microsoft 365, Teams, SharePoint, or OneDrive integration
• OIDC/OAuth2, Keycloak, or Entra ID
• Experience with sensitive data, enterprise permissions, auditability, compliance
• DevSecOps, automated testing, observability
• AI-enabled document workflows, search/summarization, or agentic patterns
• LangChain, LangGraph, Semantic Kernel, LlamaIndex, or OpenAI/Azure OpenAI APIs

Working Conditons

Standard office/remote software engineering role. Primarily sedentary computer-based work; no unusual physical demands or environmental hazards. Requires sustained focus for coding, code review, and collaborative technical sessions (in person or virtual).