CRO Expert

Still Archive is a fast-scaling DTC brand running a high-velocity conversion optimization program on Shopify Plus. We are hiring a top-tier Shopify developer to function as a technical executive assistant to the CEO: you will own the planning, scheduling, and hands-on implementation of our A/B testing roadmap end to end.

This is not a ticket-taking dev role. You will operate as a direct extension of the CEO, translating test hypotheses into scoped experiments, managing the testing calendar, building the variants in theme code, QA'ing them, launching them, and coordinating readouts. You will work alongside an existing AI agent infrastructure and are expected to be fluent in AI-assisted development workflows, specifically Claude Code.

Responsibilities

• Own the A/B testing calendar: intake test ideas, scope them, sequence them to avoid overlap and traffic contamination, and maintain a rolling schedule of live, queued, and completed tests

• Implement test variants directly in Shopify theme code (Liquid, JSON templates, sections, metafields, CSS/JS), including PDP, cart drawer, and checkout-adjacent experiences

• Build and configure tests in our experimentation stack (currently Intelligems), including audience splits, goal tracking, and revenue metrics

• Execute theme development through Claude Code, using the Shopify MCP server and/or Admin API as the primary workflow

• Maintain clean theme branching and rollback discipline so any test can be killed or promoted within minutes

• QA every variant across devices and browsers before launch, with particular attention to mobile (majority of our traffic) and an older female demographic (readability, tap targets, trust elements)

• Coordinate with the CEO and internal AI systems on test readouts, significance calls, and next actions

• Handle urgent site issues (broken sections, theme regressions, app conflicts) as they arise

Required Qualifications

• 5+ years of Shopify development experience, with substantial work on Shopify Plus stores

• Deep familiarity with the Shopify Partner/developer dashboard, theme architecture (Online Store 2.0), Admin API, and Storefront API

• You have built and published your own Shopify app, public or private. This is a hard requirement. We want someone who understands the platform from the app developer side, not just the theme side. Be prepared to link to it and walk through the architecture.

• Proficiency with Claude Code for Shopify theme development, including working through the Shopify MCP server and/or driving changes via the Admin API. You should be able to describe your actual workflow, not just claim familiarity.

• Hands-on experience with A/B testing tools on Shopify (Intelligems strongly preferred; Shoplift, Convert, or similar acceptable), including split configuration, statistical readouts, and revenue-based goal tracking

• Strong understanding of CRO fundamentals: funnel math, sample sizing, test duration, interaction effects between concurrent tests

• Excellent written communication. Most coordination happens asynchronously in writing and must be fast, precise, and unambiguous.

Availability Requirements (Read Carefully)

This role has strict availability expectations. Do not apply if you cannot meet them.

• Response SLA: 30 minutes or less during regular PDT working hours (9:00 AM to 6:00 PM Pacific, Monday through Friday)

• On-call: Available around the clock for urgent issues (site-breaking bugs, test malfunctions, launch windows). Off-hours response expectation is best-effort but prompt.

• You must be reachable via our preferred channels (Slack/Telegram) and comfortable with an always-on communication style during business hours

Nice to Have

• Experience working with or alongside AI agent systems (autonomous coding agents, MCP-based tooling, agentic workflows)

• Checkout extensibility and Checkout UI extensions experience

• Familiarity with attribution and analytics stacks (Triple Whale, GA4, server-side tracking)