Hands-on GA4 + GTM implementation and troubleshooting. Familiarity with Heap, Braze, or LaunchDarkly, or eagerness to learn. Good grasp of data-layer design, tag debugging, and validation workflows. Experience writing or maintaining tracking specs, QA checklists, or governance documentation. Familiarity with server-side tagging or event forwarding (e.g. GTM Server, Segment). Experience running QA and reconciliation between GA4, Heap, or Braze. Exposure to feature flags or experimentation tools, such as LaunchDarkly.