Corey Deloach

I’m a full-stack engineer with 12 years shipping scalable web products in SaaS and fintech. I specialize in React, TypeScript, and Node.js backend systems, with a bias toward owning features end-to-end—from architecture through deployment.

At Nielsen, I architected and shipped a full-stack billing dashboard, using a real-time data sync pattern that reduced API calls by 60% and supported 10K concurrent active users. I also owned SaaS subscription management end-to-end, delivering React frontend charting with Node.js and PostgreSQL plus AWS Lambda event handlers—shipped two quarters ahead of roadmap.

I’ve led major modernization work, including migrating a legacy monolithic backend to modular microservices. By defining service boundaries and async communication patterns, I reduced deployment time from 45 minutes to 8 minutes, and I debugged a revenue-impacting production issue by reworking async error retry logic to prevent $2M in uncollected invoices.

I bring strong engineering fundamentals: establishing TypeScript standards across a 6-person team, mentoring on type safety, refactoring 40K LOC, and reducing runtime bugs by 35%. I’ve also built robust delivery pipelines with GitHub Actions, automated testing/linting, Docker builds, and blue-green deployments to AWS.