This role spans front-end (React, JavaScript, HTML/CSS), back-end (Java, Spring Boot, Python, Apache Camel, GraphQL), data, and cloud layers — translating mission requirements into scalable, maintainable solutions that meet federal compliance requirements (NIST 800-53, FedRAMP, DHS 4300A). Define and maintain reference architectures, design patterns, API contracts, and architectural decision records (ADRs) that guide the engineering team and ensure consistency across the program.