Senior TS/SCI Full-Stack Developer - Real-Time API/UI

CACI International Inc; Chantilly (VA); On-site; USD 99,000 - 207,000; Full time

Job summary

CAC I International Inc. seeks a Mid-Senior Full Stack Developer to design the API layer and modern web UI delivering real-time data to external partners. You will build responsive React front-ends and scalable APIs using Node.js, Python, or Java, while enforcing strong security practices and CI/CD automation.

The role requires TS/SCI with polygraph, a CS-related degree, and 5+ years of experience in full-stack engineering, with travel up to 5%.

Qualifications

• Current TS/SCI clearance with Polygraph.
• Bachelor’s 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 Node.js, 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%.

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 Node.js, 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.

Skills

React

JavaScript/TypeScript

API design

OAuth2

OIDC

mTLS

CI/CD

Kubernetes

Docker

AWS

Education

Bachelor’s degree in Computer Science or related field

Tools

GitLab CI/CD

Helm

Job description

CAC I International Inc. seeks a Mid-Senior Full Stack Developer to design the API layer and modern web UI delivering real-time data to external partners. You will build responsive React front-ends and scalable APIs using Node.js, Python, or Java, while enforcing strong security practices and CI/CD automation.

The role requires TS/SCI with polygraph, a CS-related degree, and 5+ years of experience in full-stack engineering, with travel up to 5%.