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William Hatton
Senior Full-Stack Software Engineer specializing in AI-driven SaaS and cloud platforms
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Backend/data engineer focused on production-grade Python services and AWS platforms: builds FastAPI microservices on EKS with strong reliability patterns, CI/CD, and observability. Also delivers AWS Glue/Redshift analytics pipelines with schema-evolution and data-quality safeguards, and has modernized legacy batch processing into maintainable services with parallel-run parity validation and feature-flagged rollouts.
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Key Strengths
- Built and operated production FastAPI microservices on AWS (Docker/Kubernetes/EKS) with PostgreSQL and Redis
- Designed reliability patterns for APIs (JWT/OAuth2 auth, retries/timeouts, circuit breaking, structured validation)
- Implemented automated CI/CD with security checks and zero-downtime Kubernetes rolling deployments
- Production observability ownership (centralized logging, Prometheus/Grafana metrics/alerts, Sentry error tracking)
- AWS Glue ETL design from S3/PostgreSQL to S3 (Parquet) and Redshift with schema evolution and data quality controls
- Incident ownership for batch/ETL failures with monitoring-driven detection and prevention via schema validation
- SQL performance tuning with measured impact (PostgreSQL query reduced from minutes to <10 seconds via indexing/rewrites/partitioning)
- Legacy batch system modernization to Python services with parity validation (parallel runs, reconciliation/diff reports) and risk controls (feature flags, phased rollout)
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