Retention & Klaviyo Engineer Specialist

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.