Senior Full Stack Developer

DMI • Tysons, VA

11d • Remote

About The Position

DMI is seeking a Senior Full-Stack Developer to help build and modernize a mission-critical Department of Defense enterprise application. The system is an offline-first Progressive Web Application (PWA) that operates seamlessly across connected command centers, intermittent tactical networks, and fully disconnected environments. The role spans the full stack: a React and TypeScript front end, a Node and Express back end migrating to AWS serverless, and the synchronization and integration layers that keep the product working when the network does not. This is an AI-first engineering team. We deliver using an AI-augmented development methodology built around agentic coding tools, and fluency with those tools is a core competency of this role. Senior developers spend a meaningful share of each week directing, reviewing, and hardening AI-generated code, and they remain fully accountable for every line that ships.

Requirements

• 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 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.
• 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
• Active DoD SECRET required at start of work. An interim SECRET may be accepted for transition per contract terms, with final SECRET required within 90 days.
• U.S. Citizen required.
• Personnel performing Information Assurance functions must meet the applicable IAT or IAM certification baseline and maintain currency throughout the period of performance.
• The candidate must work from a U.S.-based location suitable for handling controlled unclassified information.

Nice To Haves

• Master's preferred.
• Ability to obtain Top Secret is preferred.
• AWS Certified Developer (Associate) or AWS Solutions Architect (Associate)
• 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

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.
• Write and maintain automated tests (Jest, Vitest, Playwright, supertest, Lighthouse), participate in code reviews, and support functional, regression, performance, and accessibility testing (Section 508 / WCAG).
• 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.

Benefits

• Virtual health visits, commuter perks, pet insurance, and entertainment discounts that make life easier.
• Annual performance reviews, tuition assistance, and internal career growth opportunities to help you thrive.
• Generous 401(k) matches, life and disability insurance, and financial wellness tools to support your future.
• Annual awards, service anniversaries, referral bonuses, and peer-to-peer shoutouts that spotlight your achievements.
• Healthcare coverage, wellness programs, flu shots, and biometric screenings to support your health.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior