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Annie Chang

Senior Full-Stack/Backend Software Engineer specializing in cloud-native automation and microservices

Booz Allen HamiltonUC DavisSan Francisco, CA9 Years ExperienceSenior Level

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About

Backend/data engineer with strong AWS production experience across containers (ECS) and serverless (API Gateway/Lambda/SQS), plus Glue-based ETL to Parquet for Athena/Redshift. Demonstrates hands-on reliability and security depth (Cognito OAuth2/JWT with JWKS rotation, idempotency/DLQs, monitoring) and measurable performance wins (Redis caching + query tuning), along with legacy-to-services modernization using parallel-run parity and feature-flagged cutovers.

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Key Strengths

  • Built and operated Python/FastAPI backend on AWS with OAuth2/JWT (Cognito) and 99.9%+ uptime
  • Performance optimization: Redis caching and query tuning improving performance up to 45%
  • Deep JWT/JWKS implementation details (key rotation handling, strict claim validation, clock-skew leeway, safe logging)
  • Designed serverless pipeline (API Gateway→Lambda→SQS→Lambda) with Terraform + GitHub Actions CI/CD, alarms and rollback
  • Reliability engineering for spikes: reserved concurrency, batch sizing, DLQ, controlled backoff, idempotent workers; reduced error rate
  • Built resilient AWS Glue ETL with schema evolution controls, quarantine/reject paths, and data quality gates with alerting
  • Modernized legacy batch/rules workflow via versioned services, parallel runs for parity, feature-flagged phased cutover and rollback

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Experience

Senior Full Stack Developer (Java Backend-Leaning)Booz Allen Hamilton · Jan 2023 – Present
Full Stack DeveloperFeather · Sep 2021 – Feb 2022
Full Stack Developer (Java/Spring Batch)Los Angeles Capital Management (LACM) · Feb 2018 – Aug 2021
Frontend / Full Stack DeveloperConcept Art House · Nov 2016 – Jan 2018

Education

UC Davisbachelor, Computer Science

Skills

API DesignAPI GatewayAngularAsynchronous ProcessingAuthenticationAuthorizationAWSAWS IAMAWS LambdaBatch ProcessingCachingCI/CDCode ReviewsCypressDatadog

Languages

English

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Connect with Annie

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Typically responds within 24 hours

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Annie ChangSenior Full-Stack/Backend Software Engineer specializing in cloud-native automation and microservices