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Introduction As Optimizely developers, we frequently encounter requirements to allow editors to inject third-party scripts into the head or body of a site. Typical examples include Google Tag Manager (GTM), Facebook Messenger chatbots, or...

Amit Mittal

Optimizely export packages have quietly become more complex. Inline (nested) blocks in CMS 12 and PaaS solutions weren’t always displayed clearly, and with SaaS CMS—and soon CMS 13—Visual Builder introduces compositions, layout hierarchies, and...

Allan Thraen

Over 150 Optimizely partners met in Shoreditch for the 2026 London Partner Kick Off. The theme was very much Opal with a side order of Optimizely's Simon Chapman bringing the "sexy back" to (the forthcoming) CMS 13. Here's my 5 hot takes from the...

Mark Welland

A practical, end-to-end playbook for higher quality A/B tests: conditional activation, targeting, metrics, power, SRM, and decision discipline.

Hristo Bakalov

In my previous post, I showed how to build a memory-efficient catalog traversal service for Optimizely Commerce. The service uses streaming to process large catalogs without loading everything into memory at once.

Stanisław Szołkowski

If you have worked with Optimizely CMS for any amount of time you know that managing localization through XML files can be tedious. Content type names, property captions, tab names, editor hints - they all need translations, and keeping those XML...

Per Nergård (MVP)

Here is a little-known trick to store and retrieve JSON property data more efficiently.

Stefan Holm Olsen

The Development Agent in Web Experimentation just got a major upgrade - moving from single-element edits to page-level changes with design system integration

Hristo Bakalov