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Growth Marketing Manager Neptune

Growth Marketing Manager

Full Time • Neptune
Benefits:
  • Bonus based on performance
  • Company parties
  • Competitive salary
  • Employee discounts
  • Health insurance
  • Opportunity for advancement
  • Paid time off
Company: Monmouth Cards
Location: In Office
Type: Full-time

About Monmouth Cards

Monmouth Cards is a fast-growing trading card and collectibles brand focused on scaling profitably through paid media and retention marketing. We’re looking for a performance-driven marketer who can fully own our paid ads and lifecycle marketing — from strategy to execution.

This role is for someone who loves numbers, testing, and growth, but also understands brand, customer experience, and long-term LTV.

What You’ll Be Responsible For

Paid Advertising (Primary Focus)

  • Own 100% of paid ad spend across:

    • Google Ads (Search, Shopping, Performance Max, YouTube if relevant)
    • Meta Ads (Facebook & Instagram)

  • Plan, launch, and optimize campaigns to hit ROAS, CAC, and growth targets
  • Manage budgets, scaling winners and cutting losers quickly
  • Creative testing strategy (copy, hooks, angles, offers) — working with our team or creatives as needed
  • Build and optimize audiences, retargeting, and attribution logic
  • Weekly reporting with clear insights, not vanity metrics

Email & SMS Marketing (Klaviyo)

  • Fully manage Klaviyo email + SMS
  • Build, optimize, and maintain:

    • Core flows (Welcome, Abandoned Cart, Browse Abandonment, Post-Purchase, Winback, etc.)
    • Campaigns tied to promos, drops, and seasonal pushes

  • Improve revenue per subscriber, open rates, CTR, and unsubscribe rates
  • Segment intelligently based on behavior, purchase history, and engagement
  • Ensure email & SMS align with paid traffic and overall funnel strategy

Strategy & Optimization

  • Take a full-funnel view: acquisition → conversion → retention
  • Identify opportunities to improve LTV and overall marketing efficiency
  • Run A/B tests across ads, landing pages, and lifecycle messaging
  • Stay on top of platform changes (Meta, Google, deliverability, etc.)
What We’re Looking For

  • Proven experience managing Google Ads + Meta Ads for eCommerce brands
  • Strong hands-on experience with Klaviyo (email + SMS)
  • Data-driven mindset — you make decisions based on performance, not vibes
  • Comfortable owning results end-to-end (not just “running ads”)
  • Strong understanding of ROAS, CAC, LTV, attribution, and scaling
  • Bonus: experience in collectibles, trading cards, or hobbyist eCommerce
Nice-to-Haves (Not Required)

  • Experience with Shopify
  • Creative strategy experience (angles, offers, UGC direction)
  • Familiarity with GA4, Triple Whale, or other attribution tools
  • Copywriting chops for ads, email, or SMS
What Success Looks Like

  • Profitable, scalable paid ad performance
  • Strong email & SMS revenue contribution 
  • Clean, well-documented campaigns and flows
  • Clear communication and proactive optimization ideas
  • You treat the ad spend like it’s your own money
Why Work With Us

  • Real ownership and impact — no red tape
  • Room to grow with the brand
  • Competitive pay based on experience
  • Flexible, remote-friendly work environment

Compensation: $70,000.00 - $100,000.00 per year




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