Full Stack Developer

We are seeking an experienced Full Stack Developer to support a Department of Defense (DoD) healthcare technology program focused on the sustainment, enhancement, and modernization of a mission-critical operational application.

This position will initially support the program on a part-time basis, approximately 20 hours per week, as the application is currently operating primarily in a sustainment and continuous-improvement environment. The role has the potential to expand as future development and modernization requirements increase.

The developer will work across the application stack supporting backend services, responsive user interfaces, data management, system integration, and deployment within a DoD Cloud One / DevSecOps environment., · Develop, maintain, troubleshoot, and enhance full-stack application capabilities.

· Build and maintain backend services using Python, preferably FastAPI, with Django or Flask experience also considered.

· Develop APIs and data-access layers using SQLAlchemy/SQLModel and manage database schema changes using Alembic.

· Develop and enhance responsive frontend applications using React; experience with Angular or Vue will also be considered.

· Develop interfaces optimized for desktop, tablet, and handheld/mobile form factors.

· Work with PostgreSQL databases; Oracle experience is beneficial, particularly for legacy-system migration and integration.

· Develop and maintain containerized applications using Docker and Kubernetes.

· Support applications designed to operate in offline or intermittently connected environments, including data replication, store-and-forward patterns, queue-based synchronization, and conflict resolution.

· Participate in Agile development activities, including backlog refinement, sprint planning, development, testing, code reviews, demonstrations, and defect remediation.

· Support CI/CD and DevSecOps pipelines, automated testing, vulnerability scanning, deployment, and release activities.

· Support application integration and API development with other DoD systems and services.

· Assist with troubleshooting production and sustainment issues and implement patches, bug fixes, and approved enhancements.

· Support DoD cybersecurity and compliance requirements, including ATO, RMF, STIG, CAC/PKI authentication, and continuous compliance activities.

The PWS specifically requires Agile development, software updates to address defects/test results, and CI/CD pipelines incorporating testing, security scanning, compliance and deployment automation.

· Active DoD Secret security clearance

· Strong hands-on Python development experience

· Experience developing RESTful APIs and backend services using FastAPI, Django, Flask, or similar frameworks

· Hands-on experience with React or comparable modern JavaScript frameworks

· Experience with relational databases, preferably PostgreSQL

· Experience with Docker and containerized application development

· Working knowledge of Kubernetes

· Experience developing and consuming APIs

· Experience with Git-based source control and modern CI/CD pipelines

· Strong troubleshooting and software sustainment skills

· Ability to work effectively in a distributed Agile development environment

· Ability to work approximately 20 hours per week, with availability during portions of normal Government business hours

Highly Desired Qualifications

· Previous DoD Cloud One development experience

· Experience supporting DoD or federal applications operating under an ATO

· Familiarity with RMF, STIGs, DevSecOps, and continuous ATO/compliance

· Experience with CAC/PKI authentication

· Experience developing applications for DDIL or intermittently connected environments

· Experience with store-and-forward architectures, message queues, data replication, synchronization, and conflict resolution

· TypeScript experience

· Oracle database experience

· Experience migrating legacy applications or data to modern cloud architectures

· Experience with DoD healthcare, operational medicine, or other mission-critical systems

Tenacity Solutions, LLC (Tenacity) is a Service-Disabled Veteran Owned Small Business (SDVOSB) founded by our CEO, Gabriel Brown, CAPT, USN (Ret). Tenacity is an innovative company, leveraging talent, skill, and knowledge with cutting-edge and proven practices to deliver solutions and products that exceed customers’ requirements and surpasses their expectations. Tenacity immediately has become a leading technology and management solutions provider with a mission to advance healthcare services for specialized populations including Veterans and their families. Headquartered in North, Bethesda, Maryland (DMV), our talented resources are located across the United States. We bring diverse talent to design solutions that help customers with their greatest challenges.