Senior Full Stack Developer

About The Opportunity

DMI is seeking a Senior Full-Stack Developer to help build and modernize a mission-critical Department of Defense enterprise application.

Duties And Responsibilities

• Perform detailed design, development, unit and integration testing, and delivery of features spanning the front end, back end, synchronization layer, and external integrations.
• Produce scalable, secure, high-quality TypeScript and Node code that satisfies both functional and non-functional requirements (performance, offline resilience, accessibility, security).
• Build and maintain an offline-first PWA front end in React and TypeScript, using Redux Toolkit for state, Material UI for theming, and Vite for builds; implement service workers, background sync, and encrypted at-rest storage (IndexedDB with FIPS-validated AES-256-GCM).
• Build and maintain back-end services in Express and Node using established controller and repository patterns, and contribute to the incremental migration of the monolith into domain-aligned AWS Lambda services.
• Implement and migrate persistence across both MongoDB and DynamoDB, including modeling DynamoDB access patterns for single-table designs.
• Develop configurable software services that integrate the application with external DoD and enterprise systems, handling data transformation, format conversion, and delta/change-data-capture synchronization while preserving data integrity for accountability workflows.
• Implement multi-protocol integration (REST, SOAP, SFTP) with pluggable authentication (CAC/mTLS, OIDC, JWT, OAuth2, API key, SSH key).
• Design data movement and process flows for connectivity-aware operation across online, intermittent, and disconnected modes.
• Apply secure-development best practices and program design patterns, including layered authentication, role-based authorization, resource-level access control, and tamper-evident audit trails.
• Use agentic AI coding tools to generate, refactor, and migrate code in logical, reviewable chunks, then direct, review, and harden that output to program quality and security standards.
• Create and maintain design and systems documentation, architecture decision records, API specifications (OpenAPI/Swagger), and process and data-flow diagrams.
• Lead feature-area design, set and enforce coding standards, mentor mid-level developers, and own technical trade-off decisions for an assigned domain.
• Collaborate with the technical delivery lead, solutions architect, DevSecOps engineers, UX designers, cybersecurity staff, and mission users within an Agile/Scrum cadence and a Git-based CI/CD pipeline.
• Ensure assigned work lands within sprint and program schedules.

  Qualifications

  • Education and Years of Experience: 10 or more years of overall software development experience. Five or more years of professional experience in Node, TypeScript, and React. Three or more years of building on AWS serverless. Bachelor's degree in Computer Science, Software Engineering, or a related field. Master's preferred. Equivalency: a Master's degree substitutes for two years of experience, and an Associate's degree plus four years substitutes for a Bachelor's.
  • Security clearance and citizenship are non-waivable and carry no equivalency.
  • Required Skills and Technologies: Languages and runtime: TypeScript, modern JavaScript (ES2022+), Node.js 24 Front end: React (hooks, function components), Redux Toolkit, Material UI, and Vite; Progressive Web App development including service workers, Workbox, IndexedDB, background sync, and offline-first architecture; accessibility to Section 508 / WCAG Back end and data: Express REST APIs using controller and repository patterns; MongoDB (Mongoose) and DynamoDB (single-table design and access-pattern modeling), with experience migrating from document or relational stores to DynamoDB strongly desired; API design with OpenAPI/Swagger Cloud and serverless: AWS Lambda, DynamoDB, API Gateway, Step Functions, EventBridge, and SQS; a managed-service-first approach that favors AWS managed services over bespoke plumbing where they fit; incremental monolith-to-serverless (Strangler Fig) migration patterns; AWS GovCloud exposure (IL5/IL6) desired Integration and synchronization: multi-protocol integration across REST, SOAP, and SFTP; authentication schemes including CAC/mTLS, OIDC, JWT, OAuth2, API keys, and SSH keys; delta/CDC synchronization, ETL and data transformation, and legacy-system integration Security and compliance: secure coding for DoD and government environments; AES-256-GCM and FIPS 140-3 crypto awareness; RBAC and audit logging; familiarity with RMF, STIG, and NIST 800-53 expectations in a delivery context Tooling and process: Git and CI/CD (GitHub Actions) or GitLab; monorepo discipline; Jest, Vitest, Playwright, supertest, and Lighthouse; Docker and containerized local development; Agile/Scrum ceremonies AI-augmented development (core competency): hands-on fluency with agentic AI coding tools, with Claude Code and Claude Opus strongly preferred and GitHub Copilot, Cursor, or comparable agentic tools accepted as transferable experience; effective spec-writing and prompting, chunked generation, and rigorous review and hardening of AI-generated code for correctness and security

  Desired and Preferred Skills

  • Prior DoD or federal digital modernization experience, and familiarity with military or government accountability and readiness workflows
  • Experience designing for disconnected, intermittent, and low-bandwidth (DDIL) environments
  • Experience integrating with DoD personnel, logistics, or records systems
  • Experience with the Model Context Protocol (MCP), retrieval-augmented generation (RAG), or large-language-model provider abstraction and failover patterns
  • Experience with multiple AI inference deployment models, including commercial cloud, sovereign cloud, and on-device or edge AWS Lambda Powertools, CloudWatch, and X-Ray observability, and infrastructure-as-code (CloudFormation, CDK, or Terraform)
  • Performance testing (k6) and visual-regression or Storybook testing
  • Comfort working in air-gapped environments where cloud and external tooling, including AI tooling, are unavailable

  Benefits

  DMI values employees for their talents and contributions, and we take pride in helping our customers achieve their goals. Because when we live our values, we all win together.

  Location

  McLean, Virginia