Built enterprise RAG and AI agent platform services on Google Cloud, enabling Gemini-based search assistants over private business data. Focused on permission-aware retrieval across multi-tenant deployments, ingestion, ranking, grounding, evaluation, observability, and reliability. Implemented IAM-based data access controls and metadata filters to enforce real-time authorization before grounding AI answers. Created data ingestion pipelines with Dataflow for transforming enterprise files into searchable, permissioned knowledge stores. Designed retrieval and ranking workflows combining keyword relevance, semantic context, Vertex embeddings, and freshness signals for accurate grounding. Implemented evaluation and guardrails with RAG metrics and an LLM-a-judge to measure grounding quality and reduce hallucinations prior to production. Reduced latency by decoupling retrieval from answer generation and streaming grounded responses. Optimized cost with Kubernetes autoscaling, batch indexing,

Senior Software Engineer at Slack Technologies

June 1, 2014 - November 1, 2021

Built back-end and full-stack services for Slack Enterprise Grid, enabling large organizations to manage multi-workspace setups under a single enterprise account. Owned identity, workspace provisioning, admin APIs, permission enforcement, and migration to OAuth. Implemented organization-wide MySQL identity models mapping users to orgs, workspaces, teams, and channels while preserving scoped access controls. Built Enterprise Grid admin APIs using PHP/Hack, covering policy enforcement, audit logging, workspace lifecycle, and admin console workflows end-to-end. Executed migrations to OAuth with idempotent jobs, rollback-safe validation, and large-customer rollback planning. Reworked workspace-centric data models to support org-aware relationships without regressions. Hardened admin APIs with Redis caching to reduce MySQL lookups for membership, channel access, and policy enforcement under high throughput. Implemented end-to-end rollout validation in CI/CD and automated approval checks for