Paul S.

Selected Projects

Backend systems I’ve designed, built, or led — short writeups with context, what I did, and what it changed.

  1. 01

    Cart-Checkout Platform

    A backend checkout orchestration service across cart, catalog, promotions, payments, and downstream order workflows — and the layer that let Peloton migrate off a legacy monolith one funnel at a time without risking revenue.

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  2. 02

    Warranty Checkout Migration

    A staged migration that launched a migrated checkout flow, generated $500K+ in the first two months, and reduced checkout latency from ~30s to under 5s.

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  3. 03

    Catalog Migration to Commercetools

    A commerce catalog migration from legacy CMS systems to Commercetools across regions and channels.

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  4. 04

    Checkout Observability & Reliability

    Metrics, dashboards, alerts, error taxonomy, and production cutover monitoring for checkout systems.

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