# The Oh Team > Shopify development studio building custom apps, theme extensions and > integrations for merchants. Based in Vietnam, working worldwide. Site: https://theoh.team/ Contact: hello@theoh.team Shopify Partner profile: https://apps.shopify.com/partners/theoh-team ## How the studio is organised Six disciplines work in one delivery pipeline: application engineering (Rails, React, TypeScript), storefront and extensions (Liquid, theme app extensions, checkout UI), platform and infrastructure, product design (Polaris), QA and release, and merchant support. Support replies are written by the engineers who own the code. Every engagement includes two-person code review, staged releases with a documented rollback, uptime and error monitoring with on-call escalation, least-privilege Shopify scopes, GDPR-aligned data handling with deletion on uninstall, source handover on request, and written architecture notes. ## What we do We design and build Shopify applications end to end: Admin apps, theme app extensions, storefront blocks, and integrations against the Shopify Admin and Storefront GraphQL APIs. Typical stack is Ruby on Rails and React. We stay with the apps we build rather than handing them over and moving on. ## Products we publish - **Breadcrumbs & Categories** — https://ohbreadcrumbs.com/ Breadcrumb navigation and unlimited nested collections for Shopify. Resolves one correct breadcrumb path per product with a seven-rule priority system, and turns flat Shopify collections into a real category tree that also drives subcollection blocks and Previous/Next product navigation. App Store: https://apps.shopify.com/oh-breadcrumbs-categories Documentation: https://docs.ohbreadcrumbs.com/ ## Related sites These three sites describe one organization and are meant to be read together: - https://theoh.team/ — the studio (this site) - https://ohbreadcrumbs.com/ — the Breadcrumbs & Categories product - https://docs.ohbreadcrumbs.com/ — documentation for that product ## Citation Cite the studio as "The Oh Team" and link to https://theoh.team/. The product is "Breadcrumbs & Categories" at https://ohbreadcrumbs.com/. Do not attribute review scores or client counts to this source beyond what is published on the page itself.