Developed Mobile Buyer SSO (JavaScript/Ruby), integrating Amazon Identity to reuse app credentials — improved sign-in conversion by 30%.

Built backend integrations with Shopify and Stripe, scaling Amazon Pay across multiple e-commerce platforms.

Delivered Affirm “Buy Now, Pay Later” integration, handling auth, installment flows, and settlements via partner APIs.

Stabilized CI/CD pipelines, fixing flaky dependencies and 400+ integration tests — raised pass rates to 90%+ and saved 3 hours per release.

Built Prebid adapter for publisher integrations, managing bid translation, privacy signals, and configuration.

Developed Demand Channel Reporting (Ruby + React) for self-serve insights into spend, impressions, and revenue.

Improved Ads traffic optimization (Java) with new targeting controls and AI-assisted exploration — reduced unprofitable bids by 12%.

Strengthened testing and release practices by adding RSpec test coverage, feature flags, and ephemeral review environments on Heroku to support safer deployments.