Head of User Experience, Growth
About ZYMIX
ZYMIX is the AI-native social super-app built for Gen Z to Live the Un-grid — a place where university students escape the algorithm fatigue of legacy platforms and find real moments, real people, real campuses. We are launching across UK universities in 2026 with one goal: 5 million users, 35% four-week retention, and a community Gen Z actually wants to belong to.
We are building the company we wish existed: opinionated about design, ruthless about user trust, and a little allergic to mediocrity.
Why this role exists
Every great consumer product is held together by one stubborn voice that refuses to ship anything that confuses, patronises, or wastes a user's time. We do not yet have that voice — and we are already paying for it.
You will own how every ZYMIX user feels — from the first push notification through onboarding, the first DM, a forced upgrade, a payment, all the way to account deletion. You are the last person standing between our product and the user, and you take that personally.
What you will do
Touchpoint gatekeeping. Every piece of user-facing copy, modal, push notification, email, App Store screenshot, and customer-support script ships only with your sign-off. You hold the pen on tone, clarity, and dignity.
Experience audits. Every month, you walk the core journeys end-to-end — signup, first chat, friend discovery, upgrade, payment, complaint, deletion — and produce a prioritised remediation list for Product and Engineering. Nothing rots in silence.
Root-cause ownership. When complaints land in support, when the App Store rating dips, when a Reddit thread goes sideways — you are the one who traces it back, files the bug, rewrites the copy, or escalates the architecture problem. You close the loop.
Compliance and brand floor. GDPR, the UK Children's Code, brand voice, and accessibility are non-negotiable. You enforce the floor; Product and Growth dance above it.
OKR integration. You translate experience into numbers the company tracks — NPS, App Store rating, D1 uninstall rate, support-ticket volume, sentiment delta after major releases — and you defend those numbers in every Growth OKR review.
You are probably right for this if
• You have 5+ years in consumer product, UX, or product marketing, with at least one product scaled past 1 million DAU.
• You have owned the copy, flows, and pixels of a real consumer product — not just a design system, not just research decks.
• You speak fluent English and conversational Mandarin (ZYMIX is a UK product with a Hangzhou-shaped supply chain — bilingual is real here, not a tick-box).
• You have strong opinions about consumer apps and can articulate why an Instagram, BeReal, or Strava decision was brilliant or catastrophic.
• You read user complaints for fun, and your phone is full of side-quest apps you are auditing in your head.
• You can write copy that a 19-year-old at UCL will actually read.
• You are comfortable arguing with founders, engineers, and designers — and being argued back at.
You are probably not right for this if
• You want a role that is purely strategy decks and no shipping.
• Your background is B2B SaaS or enterprise software.
• You believe UX equals wireframes and you outsource the writing.
• You need a fully-formed team on Day 1 (you will build it, starting with you).
What we offer
• Meaningful equity in an early-stage, venture-backed company with a clear path to scale.
• On-site at our London office, 5 days a week — we believe great consumer products are built shoulder-to-shoulder, in the same room.
• Direct exposure to the founders, CGMO, and Chairman — this is not a layered org.
• Real ownership — you will be the first and only person with this remit, with a budget and headcount roadmap once you are in.