Happy Koala LLC

Retention & Klaviyo Engineer Specialist

Vilnius, Vilnius, Lithuania - Full Time

Location: 100% Remote Position

Happy Mammoth is a fast-growing e-commerce company focused on women’s gut, digestive, and hormonal health. We’re looking for a highly technical Retention & Klaviyo Engineer Specialist to own email, SMS, and lifecycle automations across our global customer base.


What You’ll Do

  • Build & schedule email and SMS campaigns (build from Figma to Klaviyo)
  • Create and optimize flows with advanced triggers and logic
  • Use dynamic variables to pull custom properties from Recharge, Shopify, Rivo, Wonderment, etc.
  • Manage segmentation and ensure correct entry/exit logic
  • Monitor and suggest improvements for deliverability
  • Set up integrations (Zapier, webhooks, app connections)
  • Support the team with technical troubleshooting and process improvements

Requirements

  • Expert-level Klaviyo (campaigns, flows, segments, variables)
  • Strong experience in email/SMS retention, preferably in DTC/e-commerce
  • Ability to understand customer journey logic and event-triggered automations
  • Experience with subscription tools (Recharge) and Shopify data
  • Great attention to detail — nothing goes live without checks
  • Strong communication and ability to work autonomously

Nice to Have

  • Basic HTML/CSS for simple pages inside Klaviyo
  • Knowledge of deliverability tools (e.g., Google Postmaster)
  • Experience with Zapier, webhooks, Attentive

Why Join Us

  • Competitive, flexible salary
  • Paid holidays
  • Fully remote & flexible schedule
  • Global, supportive team
  • Growth opportunities + access to courses and learning resources
  • Work on a mission-driven brand helping women improve their health

If you’re a technical Klaviyo expert who loves building smart, personalized customer journeys — we’d love to meet you.


 
Apply: Retention & Klaviyo Engineer Specialist
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Can you fully implement and schedule an email in Klaviyo based on a Figma design?*
How would you rate your understanding of Klaviyo segmentation logic (inclusions, exclusions, overlaps)?*
Have you built flows using event-based triggers and adjusted flow logic based on customer actions (Recharge, subscription events, cancellations, order behavior)?*
Do you have experience using dynamic variables in Klaviyo to pull custom properties from Shopify, Recharge, Rivo, Wonderment, etc.?*
Can you build and schedule SMS campaigns or flows in Klaviyo or Attentive?*
What Klaviyo task or area did previous teams rely on you as the expert for?*
This is a remote, full-time contractor role. If you are okay with that arrangement please share your expected monthly salary range in USD.*
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