Growth Manager

Fyxer AI; London; Hybrid; GBP 65,000 - 90,000; Full time

Job summary

Join a forward-thinking company that is revolutionizing the way we interact with AI through an innovative executive assistant. In this dynamic role, you will own the entire growth lifecycle, leveraging your expertise in acquisition and activation metrics to drive user engagement and retention. With a strong focus on experimentation and data-driven decision-making, you will refine marketing strategies and enhance the user experience. This is an exciting opportunity to make a significant impact in a rapidly growing startup backed by top-tier investors, where your contributions will shape the future of AI-driven solutions. If you're passionate about technology and eager to take on new challenges, this role is perfect for you.

Qualifications

• 4-8 years of experience in acquisition or activation metrics.
• Fluency in experiment design and storytelling for budget approval.
• Experience with lifecycle, referral, or product-led growth.

Responsibilities

• Refine and drive the self-serve funnel for business users.
• Ensure optimal attribution and testing for marketing channels.
• Build lifecycle and CRM capabilities to enhance monetization.

Skills

Acquisition KPIs

Experiment Design

CAC/LTV Maths

SQL

Analytics

Lifecycle Marketing

Referral Loops

Product-led Growth

Tools

Customer.io

Posthog

BigQuery

Metabase

Meta Ads

Google Ads

LinkedIn Ads

TikTok Ads

Job description

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Whats on offer

• This role pays £65k-£90k/year DOE & equity & other benefits
• Jons, our Growth Director, is the hiring manager
• We work from our office in Chancery Lane, London, Monday to Thursday. Fridays are optional work-from-home days.

What are we building? An AI Executive Assistant

We've built an AI executive assistant that looks at your emails, messages, and meetings, and uses that knowledge to answer your emails, schedule meetings, take next steps from meetings, and organise your inbox.

Unlike other startups, we're a pure-play applied AI company and not a SaaS company with AI features hastily bolted on. We use the best techniques (fine-tuned open-source models, tool use, and retrieval-augmented generation), and as a result, users send 53% of the email drafts we generate.

How has it been going?

Since our launch in March 2024, we've grown from $0 to $8 million in revenue, serving thousands of paying users. In February 2025, we raised a $10 million Series A to accelerate our path to $50 million in revenue and are backed by top-tier investors including Marc Benioff (CEO of Salesforce) and 20VC.

What do we value?

We're very intentional about adding new people. We believe a small team of exceptional people working hard at a problem they care about will always outperform a larger, more unfocused team. That means you'll need to bring an intensity to this role that might not be expected at other companies but it also means you'll be fast-tracked into roles with greater responsibilities far earlier.

We also believe in hiring people who want ownership and autonomy in their work and giving it to them. We hire T-shaped individuals who can own the entire growth lifecycle, end to end. Instead of just driving down CPA or improving conversion rate, you'll look at the whole funnel and user experience: shaping the roadmap by thinking from first principles, looking at usage data, and speaking to customers then architecting and implementing your ideas. We look for adaptable people that will be able to turn their hand to the highest impact areas of our growth.

How will I feed into the Fyxer Growth engine?

We've proved that a "big-block" paid engine works-rapid scaling on Meta, Google and cold email took us to $8 m ARR in 12 months. Now we're finessing the power-train: a lean, hybrid system where every sensor, turbo spin and KERS element (read: PLG, content and referral loops) compounds growth at just the right fuel burn.

Your mission is to refine and help drive that system for our self-serve funnel: get more business users to connect their work inbox, hit the "aha, draft sent" moment, and return daily - without ever talking to sales.

Types of projects we're trying to solve for this month:

• Dial-in the sensors. Make sure attribution, incrementality testing and geo/MMM views are as good as possible so we never over-fuel or under-boost a channel.
• Refine the fuel mix. Forecasting 13-week channel plans for Meta & Google, explore new channels only when they can realistically reach ≥ 20 % of media mix.
• Spin the turbo. Build out our Lifecycle/CRM capabilities to tighten onboarding and monetisation flows (PostHog events → Customer.io triggers).
• Getting under the hood. Understanding our product growth loops. Long term growth comes from our product, not just marketing.

What does our ideal hire look like?

Must have:

• 4 - 8 yrs owning acquisition or activation KPIs, preferably in B2B SaaS.
• Fluent in experiment design, CAC/LTV maths and storytelling that earns budget.
• Enough SQL (or AI) and analytics knowledge to pull your own numbers (but you won't live in the code).
• Experience moving beyond paid into lifecycle, referral or product-led loops.
• A sense of urgency and intensity in your work.

Ideal:

• Worked at an early-stage tech company (<100 people) as a growth or high agency product manager who has impacted business or commercial metrics.
• You've demonstrated through self-driven work any of the following: optimising customer journeys, building virality/seat expansion/referrals, or building revenue operations infrastructure.
• Knowledge of the typical B2B SaaS growth/revops stack-experimentation, CRM, segmentation tools.
• Keen interest in LLMs, workflow automation, and AI agents.

Our Growth stack

Points for each of the following you've interacted with:

• Paid channels (currently): Meta, Google, Cold Email, testing on Linkedin, TikTok.
• Lifecycle / CRM: Customer.io
• Posthog for frontend analytics (events, sessions, feature flags, experiments)
• BigQuery as our data warehouse, with Metabase for data visualization. Production data and Posthog events both stream into it so data is in one place.
• There is an assumption you would use AI alongside much of the above, examples which are commonplace in the team (outside of standard OpenAI, Claude, etc) Dot (analytics), HeyGen (avatars), AdManage & Motion (creative management).

The application process

• Submit your CV (no need for a cover letter)
• Initial call with someone from the Fyxer AI team to review your experience and motivation (20-30 mins)
• Experience interview with the hiring manager, Jons (30 mins)
• In office interview with Jons, and other members of our Growth and Marketing teams