Ship More Campaigns Without Breaking Deadlines
StackCertified email builders, designers, QA specialists, and copywriters for retention agencies. Production capacity that actually ships.
Promise: Ship X campaigns/week with <Y% QA error rate

Email Operators Who Actually Ship
Our retention operators pass practical Klaviyo tests before placement. They build real flows, convert real designs, and execute real QA checklists — not just answer interview questions.
Every operator demonstrates AI-native workflows: using tools like ChatGPT for copy ideation, Claude for optimization suggestions, and automation tools to speed up repetitive tasks.
StackCertified Retention Roles
Every role has dedicated certification tests designed for retention agency work. Not generic — specific.
Klaviyo Email Builder
Build flows, campaigns, and segments in Klaviyo. Template development, A/B tests, automation setup.
Email Designer
Transform Figma designs into pixel-perfect emails. Responsive layouts, dark mode, accessibility.
QA Specialist
Links, rendering, UTMs, copy review, inbox testing. Catch errors before they reach inboxes.
Copywriter
Subject lines, preview text, body copy, CTAs. Conversion-focused writing for email and SMS.
Flow Strategist
Design and optimize automated flows: welcome, abandon, post-purchase, win-back, and more.
SMS Specialist
SMS campaign management, compliance, segmentation, and performance optimization.
Problems We Solve
Campaign backlogs during peak seasons
Solution: Add certified email builders who can execute from briefs without hand-holding.
QA errors slipping through to clients
Solution: Dedicated QA specialists with checklist-driven processes catch issues before send.
Strategists stuck building emails
Solution: Free up strategists to focus on strategy while operators handle execution.
Can't say yes to new clients
Solution: Scale capacity without full-time overhead. Add operators as you grow.
Retention Certification Tests
These aren't generic assessments. Every operator passes retention-specific practical tests before placement.
Example Certification Tasks:
- Build a 3-email abandoned cart flow in Klaviyo (45 min, timed)
- Convert a Figma design to responsive email HTML
- QA audit an email campaign: find 10+ issues
- Write subject line variants and preview text for A/B test
- Design a post-purchase flow with 5+ touchpoints
Ready to Scale Your Retention Output?
StackCertified retention operators, ready in 7 days. Ship more campaigns without more chaos.
Get Retention Operators