Klaviyo Custom Integration & API Development
For brands whose existing tools, platforms, or data sources do not have a native Klaviyo connector, or where the native Shopify integration is not passing the data you actually need.
What this means technically: writing server-side or client-side code that sends events to Klaviyo via the Track API, enriching customer profiles via the Identify API, building webhooks that push data from third-party systems into Klaviyo in real time, and instrumenting custom JavaScript events in your Shopify theme using Klaviyo's onsite JavaScript SDK.
- Shopify is sending events to Klaviyo but the data payload is incomplete or structured incorrectly
- You use a third-party subscription, loyalty, or booking app that has no Klaviyo integration
- You need custom profile properties populated from external data sources to enable segmentation that is not possible with default Shopify data
- You want to track events Klaviyo does not capture by default (specific button clicks, quiz completions, calculator usage, etc.)
Klaviyo Account Audit
A technical and strategic review of your entire Klaviyo account. Not a checklist, a real diagnostic.
What you receive: a written report with specific findings and a prioritized action plan. Not generic recommendations. Specific fixes with the technical detail needed to implement them.
- Flow architecture: trigger logic, filter logic, timing, exclusion conditions
- Segmentation: whether your segments are built on accurate data and updated correctly
- Event tracking: whether Shopify events are firing correctly and carrying the right properties into Klaviyo
- Attribution: whether your attribution window is set appropriately and whether Klaviyo's reported revenue reflects actual purchasing behavior
- Deliverability: sender reputation, domain authentication (SPF, DKIM, DMARC), list hygiene, suppression logic, bounce rates
- Sending domain setup: dedicated domain vs. shared domain, warming status
Shopify × Klaviyo End-to-End Setup
For new brands setting up Klaviyo properly from the start, or brands that set it up themselves and need it rebuilt correctly.
Because I work directly in Shopify as well as Klaviyo, I can handle the full setup without handoffs: theme integration, JavaScript event instrumentation, list and form configuration, sending domain setup including DNS, core flow builds (welcome, abandoned cart, browse abandonment, post-purchase, win-back), segmentation architecture, and attribution configuration.
What this avoids: the usual back-and-forth between a Klaviyo marketer who cannot touch your theme and a web developer who does not understand Klaviyo's data model.