Sara Fang

About

Backend/data engineer with production experience building FastAPI services with strong reliability patterns (circuit breaker, rate limiting, caching, graceful degradation) and JWT/OAuth2 auth. Has delivered AWS EKS deployments via Terraform with Secrets Manager/IRSA and HPA autoscaling, and built Glue/Spark ETL pipelines on S3 Parquet with schema-evolution and idempotent reruns; also demonstrated measurable SQL tuning impact (20–30s to <10s).

Experience

Education

Key Strengths

• Built reliability mechanisms in FastAPI services (circuit breaker, rate limiting, TTL cache, graceful degradation)
• Implemented JWT/OAuth2 authentication for backend APIs
• Prevented cascading failures from downstream dependency outages using circuit breaker with bounded retries (max 5)
• Deployed services to AWS EKS using Terraform with secure secrets management (Secrets Manager, IRSA)
• Implemented dynamic scaling via Kubernetes HPA
• Designed AWS Glue/Spark ETL on S3 Parquet with Glue Data Catalog integration
• Handled schema evolution with backward-compatible changes (e.g., adding nullable columns)
• Improved SQL performance via date partitioning (latency reduced from 20–30s to <10s)
• Production incident handling with CloudWatch alerts, telemetry/log-based triage, client comms with recovery ETA, and improved alerting/schema governance