Co-own architecture for APIs, data pipelines, multi-tenant controls, time-sync, and analytics; and write reference designs. Design & build scalable REST/GraphQL and event-driven services supporting diverse integration patterns. Develop high-volume, real-time pipelines with robust validation, error handling, pass-through, and observability. Engineer for ATO from day one, aligning designs with NIST 800-53, DoD IL, and FedRAMP; contribute evidence for accreditation. Evolve our API Developer Hub (design, docs, testing, lifecycle tooling) and self-service partner onboarding workflows. Implement API lifecycle management (versioning, deprecation, migration) and platform analytics for internal/external users. Onboard third-party models and simulations (including AI/ML/LLM and space-ops training software) with clear methodology and tooling. Collaborate cross-functionally with Product, Security, DevOps, QA, and external partner teams; engage with government stakeholders. Mentor engineers on integration patterns, reliability, and operational excellence; balance speed with long-term platform health.