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Feras Alsaiari
Senior Software Engineer specializing in AWS data platforms and event-driven systems
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Capital One engineer leading the architecture and delivery of a large-scale AWS Glue/Spark/Delta Lake batch messaging pipeline that decoupled batch from real-time flows, added multi-region failover and automated retries, and delivered ~40% AWS cost savings with ~3x performance gains. Currently building an LLM-powered Slack bot using RAG to automate message investigations by querying CloudWatch, Snowflake, and internal documentation with privacy-aware masking of NPI/PII.
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Key Strengths
- Led end-to-end design and delivery of Capital One batch customer messaging pipeline on AWS Glue/Spark
- Designed multi-region (east/west) active-passive failover with Route53 health checks and orchestration
- Built automated job monitoring/retry via EventBridge-triggered Glue workflows plus SQS-based microbatch reprocessing
- Drove major performance and cost outcomes: ~40% AWS cost savings and ~3x platform performance increase
- Identified throughput bottleneck and implemented async writes achieving 5x+ write capacity and reduced worker provisioning
- Deep low-level understanding of Spark + Delta Lake checkpointing/ingestion behavior; became team SME
- Building LLM/RAG investigation workflow that queries CloudWatch, Snowflake datasets, and documentation to summarize message status
- Strong production engineering hygiene: runbooks, leveled logging, typing, modular code, dependency locking, unit + E2E tests
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