Mid-Senior Full Stack Developer

Job Title: Mid-Senior Full Stack Developer

Job Category: Engineering

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Continental US

Anticipated Posting End: 8/31/2026

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 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.

Qualifications:

Required: 

• 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%.

Desired:

• Experience with data visualization libraries such as D3.js 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 Securit