Software Engineer with ~8 years of experience building scalable backend systems, financial infrastructure, AWS cloud services, and full-stack applications.
Built and operated Tier-0 backend systems for real-time card transaction processing, converting issuer-specific authorization traffic into a common internal flow for Cash App and Square card products.
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Drove migration of the card-locking functionality from the ledger service into the transaction service, including new lock-state APIs, safe cutover synchronization, and feature-flagged rollout across 4+ dependent Tier-0/Tier-1 services.
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Developed overdraft balance stand-in capabilities that preserved transaction authorizations during ledger-service outages, and added shadow-mode metrics to validate decision accuracy before launch.
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Supported the launch of Square Card UK by integrating with internal risk systems for UK authentication requirements and building a reliable currency-conversion API for UK card transactions.
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Led response during major SEV incidents for critical card-processing infrastructure by quantifying customer impact, driving technical triage, mitigating active issues, and supporting long-term remediation.
Lead architect on new designs for numerous services in AWS.
Teams:
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AWS Documentation
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AWS Transfer Family: https://aws.amazon.com/aws-transfer-family
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Led architecture and development of internal backend services, driving design reviews, implementation planning, and delivery across infrastructure-focused projects.
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Designed and built a build-system service managing 5,000+ code packages for AWS Documentation Localization, replacing manual build submission workflows and reducing time-to-detect localization-breaking errors through earlier automated validation and failure reporting.
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Built backend services for enterprise managed file transfer use cases, including support for SFTP, FTPS, and AS2 integrations.
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Improved service reliability through monitoring, alerting, canaries, and integration testing for production systems with a high operational excellence bar.
Longest tenured engineer on a growing team. We own a reward-driven advertising product: Moments.
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Lead the team by designing and implementing features for our product using numerous AWS resources. Own all maintenance and operation of our systems.
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Drive advertiser campaigns from development, through execution, and to completion.
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Teach and develop other engineers on the team on our product and systems, how to be a software engineer at Amazon, and software development in general.
