Conversion Rate Optimization (CRO) Lead — Remote, $80k-$120k/yr inc

You'll report directly to our Head of CRO (Michael McCann).

You'll also work most closely with our growing CRO and Web team, currently consisting of two Growth Engineers and one Growth Designer.

Key responsibilities

• Test ideation & roadmap: You keep the pipeline full and prioritised, turning analytics, session data, research, and paid-performance signals into a steady stream of high-quality hypotheses, sequenced by expected impact.
• Experiment setup: You structure clean experiments with a clear hypothesis, primary metric, sample size, and guardrails, so every test produces a decision rather than a debate.
• QA hygiene: You QA every variant before it goes live, across devices and edge cases. Nothing broken, off-brand, or non-compliant reaches a user, and the funnel stays protected from regressions.
• Analysis & readouts: You read results with real statistical rigour (significance, confidence, segment effects) and call the winner, the loser, or the "inconclusive, here's what's next." Your readouts are legible and trusted.
• Program management: You are the DRI for keeping the plates spinning. You coordinate the Growth Engineers and Designer, unblock builds, chase the pipeline, and make sure momentum never depends on one person's attention.
• Analytics & reporting: You own a clear weekly cadence outlining what shipped, what won, what we learned, and what's next. The wider team can act on your learnings without needing to decipher them via bloated follow-up.

Need to have

• Experience: You've spent 4+ years running a high volume (>hundreds) of experiments for DTC ecommerce brands in high-pace, high-transaction-volume environments.
• Workstream: You’ve had dozens of tests in flight simultaneously, unblocked every build, and laid out a roadmap that’s coherently sequenced and continues to progress forward. You don’t get overwhelmed easily.
• Hands-on: You've personally owned end-to-end testing, from ideation and setup all the way to QA and readouts. You remain close to the metal and haven’t just simply managed an agency and/or a team.
• Funnel literacy: You understand the ad-to-landing-page handoff and how CRO interacts with paid efficiency (CAC, quality score, LP experience).
• Analytical: You possess a sharp analytics and CRO mindset. You're comfortable inside the data, naturally curious, and able to dig past top-line numbers into segments and behaviour. You have a hunger to improve and are constantly upskilling.
• Structured: Written planning, explicit prioritisation, and a dependable reporting cadence are what you hang your hat on. Teammates can digest and apply your learnings immediately.
• Autonomous: You operate with high ownership in a fast-moving environment. You measure yourself in outcomes, and the outcomes here require real pace. You don’t need your hand held.

Nice to have

• Statistical sophistication: You may possess deeper stats fluency, from significance and power to sequential testing and guarding against false wins. This may not be a fully fledged strength yet, but the substrate is present.
• Research: You likely have some degree of comfort with both qual and quant, from heatmaps and session recordings to surveys and user testing. This helps you source new hypotheses.
• Regulated-industry CRO: You may have experimented inside a regulated industry before, where compliance shapes what you can test, say, and ship. You know how to keep velocity high without stepping over the line.
• Technical: You don't need to code, but you maybe understand how websites and data work under the hood. You can translate ideas into precise, buildable requests for the dev + design team and QA what comes back.
• Localisation: You've likely run experimentation across multiple markets/geographies and know the practical patterns, particularly in the UK + EU.

Our cultural standards

We aim to make this your life's work. This should be the most challenging, most rewarding role of your life. Accordingly, these are the core cultural standards to which we hold ourselves & our team-members:

• Belief in the mission: We will have served 100 million patients by the end of 2035 and we transform the life of most patients who join. We have a lot of work to do. We are obsessed with our patients and are dedicated to the mission.
• Unwavering integrity: We are at the frontier, so we often live in ambiguity with no trodden path. When we can't look to others for guidance, we must maintain impeccable ethics and unwavering integrity.
• Only the paranoid survive: Bad sh*t is coming. By joining us, you're choosing to sail straight towards the storms with unhesitating conviction. However much we've already done, however far we've already come — it's still Day 1 and all our work is ahead of us.
• If we're average we fail: We are only interested in "insanely great", a focus on the quality of our execution that in everyday life would be considered pathological. We have a dedication to excellence and reject incompetence.
• Commitment to candor: That which can be destroyed by the truth should be. You get full transparency from the company and the company expects full transparency from you. We never say anything about someone that we wouldn't say to them directly. We give feedback with love and do not need to protect people from fleeting physical sensations.
• A maniacal sense of urgency: We execute at an intensity that most people think is impossible. Speed is critical and we need things done yesterday. We all work very hard and in such a competitive world there really is no other way to win.
• Enduring frugality: We are frugal. We hate being wasteful and we are anti-luxury. A culture of cheapness keeps us young. We spend our cash wisely & carefully — in a way that would make our