Server-Side A/B Testing with Optimizely: A Practical Guide for Developers

Server-side A/B testing moves experiment decisions into application code, enabling tests on backend logic like pricing algorithms and search ranking. This guide explains when to use it over client-side testing and provides implementation details with Optimizely Feature Experimentation, including SDK code for Node.js and Python. It highlights benefits such as eliminating flicker and enabling consistent assignments across web, mobile, and email.