Alexander Sterling

Architected Python Django services and React dashboards for operational workflows, reducing median API latency by 32% through PostgreSQL indexing and query profiling. Delivered LLM-powered agents with tool calling and retrieval-augmented generation, reducing manual review time by 41% while maintaining auditable traces. Implemented evaluation datasets, prompt regression checks, and deterministic fallbacks to reduce unsupported AI responses by 28% across monitored workflows. Standardized Docker deployment pipelines and automated integration tests, increasing release frequency by 2x while preserving rollback procedures and improving observable service health. Led design reviews across Django REST endpoints, authentication boundaries, and background jobs, translating ambiguous requirements into secure, maintainable product increments. Guided code reviews, pairing sessions, and incident retrospectives to support ownership and documentation in async remote teams.

Built Python services and React interfaces around external integrations, improving webhook processing throughput by 35% using idempotent tasks and resilient retry logic. Redesigned PostgreSQL schemas and migration plans for high-volume event records, reducing expensive query execution times by 27% without interrupting customer workflows. Expanded REST API contract tests and CI checks for authentication and authorization flows, lowering production regression incidents by 22% across critical integrations. Partnered with product and design teams to deliver accessible React experiences using shared components and predictable state management. Owned on-call triage, monitoring, and root-cause documentation for distributed Python services, prioritizing clear incident response and durable fixes across releases.

Implemented Django REST services and PostgreSQL data models for client applications, reducing routine report generation time by 38% through optimized database access. Built responsive React components backed by Python APIs, improving completion rates by 19% through clearer validation, intuitive navigation, and accessibility enhancements. Supported database migrations and application upgrades, coordinating compatibility checks, staged deployments, and rollback planning with senior engineers and stakeholders. Documented API contracts, authentication behavior, and deployment runbooks while contributing peer reviews and asynchronous updates across distributed engineering and client teams.