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Huiren Li
Senior Backend/Full-Stack Engineer specializing in scalable microservices on AWS
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Backend/data engineer with production experience at Uber building a near real-time driver rewards service on AWS (FastAPI, PostgreSQL, Redis) with strong reliability and concurrency controls. Also delivered AWS Lambda/ECS containerized deployments with GitHub Actions CI/CD and cost governance, built AWS Glue ETL with schema-evolution handling, and drove a ~10x SQL performance improvement while owning incident response via CloudWatch.
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Key Strengths
- Built and maintained near real-time Python backend on AWS (FastAPI/PostgreSQL/Redis) for driver rewards
- Reliability engineering: auth checks, timeouts/retries, clear error logging and alerting
- Resolved high-concurrency update inconsistencies via controlled processing and DB safeguards
- Designed AWS deployments using Lambda + ECS/Docker with GitHub Actions CI/CD and managed secrets
- Implemented cost controls for auto-scaling systems via limits and regular usage reviews
- Built AWS Glue ETL with crawlers for schema evolution plus data quality checks and retry/alerting
- Modernized legacy calculation logic into maintainable Python with side-by-side parity testing and stakeholder sign-off
- SQL performance tuning (plans/indexes/partitioning/joins) delivering ~10x query speedup
- Owned batch/pipeline incident response using CloudWatch alerts, log/metric triage, mitigation, and prevention
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