Mid-Senior Full Stack Developer

The Opportunity:
As part of the Clairvoyant program you will design and build the primary touchpoint between our platform and its customers a sophisticated API layer and modern web UI delivering critical real-time data to third-party partners.

As a Mid-Senior Full Stack Developer you will operate within a hardened AWS-based Kubernetes-native environment where modern interface standards meet strict government security requirements. This is a high-visibility role where you will:

• Engineer the Interface: Build responsive web applications using React that visualize complex real-time data sets for external customers.

• Architect the API Layer: Design and maintain RESTful or GraphQL APIs supporting seamless third-party integrations at scale.

• Secure the Stack: Implement OAuth2 OIDC and mTLS protocols and ensure all code meets DISA STIG and OWASP standards.

• Own the Lifecycle: Drive the full SDLC from agile requirements through automated CI/CD deployment on Kubernetes.

Responsibilities:

• Design and maintain responsive front-end applications using React handling complex data visualization and high-concurrency use cases for external partners.

• Build and maintain scalable RESTful and GraphQL APIs using Python (FastAPI/Flask) or Java (Spring Boot) for third-party data access.

• Implement authentication and authorization patterns including OAuth2 OIDC mTLS and RBAC to ensure secure external data access.

• Design and optimize relational (PostgreSQL) and non-relational (Elasticsearch Redis) data store interactions.

• Containerize applications with Docker and deploy to Kubernetes on AWS in coordination with the DevSecOps team.

• Ensure all code meets DISA STIG requirements and addresses the OWASP Top 10 throughout the development lifecycle.

• Integrate with GitLab CI/CD pipelines and Helm charts for deployment across environments.

• Conduct code reviews provide technical guidance for junior developers and serve as the SME for third-party API integration.

• Maintain technical documentation API specifications and integration guides.

Qualifications:

Required:

• Current TS/SCI clearance with Polygraph.

• Bachelors degree in Computer Science or related field or equivalent experience.

• 5 years (mid-level) or 10 years (senior-level) of full-stack software engineering experience.

• Advanced proficiency in JavaScript/TypeScript and React including Redux and Context API.

• Strong experience building APIs with Python (FastAPI/Flask) or Java (Spring Boot).

• Proficiency with Docker writing Dockerfiles building hardened images and integrating with CI/CD pipelines.

• Familiarity with GitLab CI/CD Helm and Kubernetes deployment.

• Comfortable working in an agile distributed team environment.

• Ability to travel up to 5%.

Desired:

• Experience with data visualization libraries such as or Recharts.

• Familiarity with GraphQL federation and advanced API design patterns.

• Experience with AWS services including ECS/EKS API Gateway CloudFront and RDS.

• Working knowledge of OAuth2 OIDC mTLS and modern API security patterns.

• Knowledge of the OWASP Top 10 and STIG-compliant development practices.

• Exposure to Elasticsearch query optimization and index management at scale.

• Working knowledge of OAuth2 OIDC mTLS and modern API security patterns.

• Knowledge of the OWASP Top 10 and STIG-compliant development practices.

• Familiarity with RHEL 9 hardening and STIG compliance at the OS and container level.

• Relevant certifications: AWS Developer Associate CKAD or CompTIA Security.

What You Can Expect:

A culture of integrity.

At CACI we place character and innovation at the center of everything we do. As a valued team member youll be part of a high-performing group dedicated to our customers missions and driven by a higher purpose to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. Youll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together we will advance our nations most critical missions build on our lengthy track record of business success and find opportunities to break new ground in your career and in our legacy.

Pay Range:

There are a host of factors that can influence final salary including but not limited to geographic location Federal Government contract labor categories and contract wage rates relevant prior work experience specific skills and competencies education and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI you will receive comprehensive benefits such as; healthcare wellness financial retirement family support continuing education and time off benefits.

The proposed salary range for this position is: