The challenge
Northline's theme had grown through seasonal patches: heavy apps, unscoped CSS, and a checkout path that leaked intent on mobile. Peak campaigns drove traffic, but conversion stalled and page speed eroded trust in the first session.
The brief was clear: ship a relaunch that protected brand storytelling while making conversion and performance measurable within 60 days.
The playbook
We treated the relaunch as three stacked sprints — foundation, experiment, and checkout — so every change had an owner and a metric.
- Rebuild the theme on a modular section architecture with critical CSS inlined and non-essential apps deferred.
- Stand up a CRO backlog: PDP social proof, bundle framing, and sticky ATC — each as a named experiment with a kill criteria.
- Simplify checkout: fewer form fields, express wallets, and shipping reassurance above the fold on mobile.
- Instrument funnel events end-to-end so weekly reviews could promote winners and retire noise.
What moved
Within 60 days, conversion rate rose 42%, average order value climbed 28%, and median page load improved by 3.2 seconds. The same experiment cadence now runs each season with a frozen theme core and a living CRO backlog.
Takeaways
- Separate brand storytelling sections from conversion modules so tests never rewrite the whole theme.
- Ship checkout trust signals before chasing vanity homepage animations.
- Keep a seasonal experiment calendar — not a one-off redesign — so gains compound.
