Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Own and optimise the entire marketing layer to drive revenue growth.
- Company: Fast-scaling applied AI company with a focus on eliminating admin overhead.
- Benefits: Competitive salary, flexible work environment, and opportunities for professional growth.
- Other info: Join a team where your ideas shape the future of growth strategies.
- Why this job: Lead impactful experiments and directly influence company growth in a dynamic setting.
- Qualifications: Experience in conversion rate optimisation and a strong analytical mindset.
The predicted salary is between 60000 - 80000 £ per year.
This role is for growth engineers who want to own the thing that actually drives revenue. If you've taken a conversion funnel from 'this probably works' to 'we know exactly why this converts, and we've tested everything', and you want to do that again at a company that's already scaling fast — this is that role. You'll be owning the full marketing layer: landing pages, programmatic SEO, signup flows, lead magnets, and the experimentation infrastructure that ties it all together. You run your own roadmap.
The Company
An applied AI company, not SaaS with AI bolted on. They've built a product that eliminates admin overhead for professionals. Since launching they've sprinted through Series A and Series B raised in under 18 months. Backed by some of the most respected names in the VC landscape and they're on track for >£150M in ARR this year.
Why This Role Is Different
Most growth engineering roles sit downstream of product decisions. This one doesn't. Growth Engineers here own their domain end-to-end, from hypothesis to experiment to rollout. There are no PMs in the chain. You decide what to test, build it, ship it, and interpret the results. The company is past the 'does this product work?' stage. The question now is: how fast can we scale acquisition, and how efficiently can we convert? That's your problem to own.
What You'll Own
- Conversion Rate Optimisation
- Drive the CRO programme across the full user journey, from paid traffic through to activation and seat expansion
- Design, build, and run multivariate experiments with statistical rigour
- Contribute to experimentation infrastructure: testing frameworks, feature flags, result interpretation, rollout decisions
- Marketing Engineering
- Build ICP-targeted landing pages for target customers
- Own programmatic SEO infrastructure and lead magnet micro-apps as conversion channels
- Collaborate with Marketing to align product-side CRO with paid and organic funnels
- Data & Growth Strategy
- Work with product analytics, revenue data, session recordings, and customer interviews to identify highest-leverage opportunities
- Identify sign-up quality signals that predict long-term retention and feed them back into acquisition targeting
- Contribute to broader growth loop strategy: virality mechanics, referrals, seat expansion, upgrade flows
The Stack
- TypeScript, React
- Serverless functions, React Query
- Feature flagging tools (GrowthBook, Statsig, PostHog or similar)
- Product analytics and event tracking pipelines
Who Thrives Here
You've shipped experiments that moved the needle and you can point to the numbers. You know the difference between statistical significance and practical significance. You understand why certain copy, layouts, and sequences drive action, and you build around that instinct.
Lead Growth Engineer - TWE 44968 in City of London employer: twentyAI
Contact Detail:
twentyAI Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Lead Growth Engineer - TWE 44968 in City of London
✨Tip Number 1
Get to know the company inside out! Research their product, values, and recent achievements. This will help you tailor your conversations and show that you're genuinely interested in being part of their growth journey.
✨Tip Number 2
Network like a pro! Connect with current employees on LinkedIn or attend industry events. Building relationships can give you insider info and might even lead to a referral, which is always a bonus!
✨Tip Number 3
Prepare for the interview by thinking about how you can contribute to their growth goals. Be ready to discuss specific experiments you've run and the impact they had. Numbers speak volumes, so bring those stats along!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re serious about joining the team and ready to dive into the growth engineering world with us.
We think you need these skills to ace Lead Growth Engineer - TWE 44968 in City of London
Some tips for your application 🫡
Show Your Impact: When you're writing your application, make sure to highlight specific examples of experiments you've run that had a measurable impact. We want to see the numbers that moved the needle for you!
Tailor Your Application: Don’t just send a generic application! Tailor your CV and cover letter to reflect how your skills align with our growth engineering role. We love seeing how you can own the full marketing layer and drive revenue.
Be Clear and Concise: Keep your application clear and to the point. We appreciate straightforward communication, so avoid jargon and fluff. Let us know exactly why you’re the right fit for this role!
Apply Through Our Website: Make sure to apply through our website! It’s the best way for us to receive your application and ensures it gets into the right hands. We can’t wait to see what you bring to the table!
How to prepare for a job interview at twentyAI
✨Know Your Numbers
Before the interview, brush up on your past experiments and their results. Be ready to discuss specific metrics that demonstrate how your work has driven growth. This role is all about owning the numbers, so showing you can back up your claims with data will impress them.
✨Understand the Full Funnel
Make sure you can articulate the entire conversion funnel from start to finish. They want someone who can take ownership of the whole process, so be prepared to discuss how you've optimised each stage, from landing pages to lead magnets. Show them you know how to connect the dots!
✨Familiarise Yourself with Their Stack
Get to grips with the technologies mentioned in the job description, like TypeScript and React. If you have experience with feature flagging tools or product analytics, be ready to share how you've used them in your previous roles. This shows you're not just a fit for the role but also for their tech environment.
✨Bring Your Experimentation Mindset
Prepare to discuss your approach to experimentation. They’re looking for someone who can design and run multivariate tests with statistical rigour. Share examples of how you've formulated hypotheses, conducted tests, and interpreted results. This will highlight your ability to own the experimentation infrastructure they need.