Data Scientist

Data Scientist

Salary: £85,000 – £95,000 + Equity
Location: London (Hybrid – 2–3 days per week in office)

We are currently looking for aData Scientist to join a fast-paced, early-stage AI startup building cutting-edge technology in the mobile app space. Reporting directly into the CTO , this Lead Data Scientist will play a critical role in shaping the company’s core product and driving real commercial impact from day one.

As a Data Scientist, you’ll be working at the heart of the business, designing and deploying machine learning models that predict user behaviour, helping clients optimise for revenue, retention, and long-term value rather than just installs. ThisData Scientist will take ownership of a key part of the platform, working closely with the founders to turn complex data into actionable, high-impact solutions.

Day-to-day, the Data Scientist will be building models, experimenting with new approaches, and continuously improving performance across customer datasets. You’ll be operating in a highly collaborative but autonomous environment where your work directly influences product direction and business outcomes.

The Opportunity

This is a genuinely high-impact role, where you’ll have ownership, visibility, and the chance to shape both the product and the company’s future.

As a Lead Data Scientist, you will:

• Design and build advanced machine learning models focused on:
• User behaviour prediction
• Churn and propensity modelling
• Develop a scalable “model factory” capable of generating bespoke models per client
• Work with complex behavioural event data from mobile applications
• Collaborate directly with the founders on product and technical direction
• Continuously experiment, iterate and improve model performance
• Own a key part of the data science stack end-to-end

What makes this different?

• You’re not optimising dashboards, you’re building the core product
• Your work directly impacts client revenue and acquisition strategy
• You’ll operate with real ownership , not layers of process
• It’s a chance to join early and help shape a product

What’s in it for you?

• £85,000 – £95,000 base salary
• Meaningful equity in a high-growth startup
• Opportunity to work alongside experienced founders
• High ownership and autonomy from day one
• Exposure to cutting-edge machine learning challenges
• Clear progression as the company scales
• Hybrid working (London-based, 2–3 days in office)

Must have:

• Strong experience in machine learning / data science (typically 4–8+ years)
• Proven experience building and deploying ML models in production
• Solid understanding of:
• Churn modelling
• Propensity modelling
• Behavioural data analysis
• Strong Python skills (e.g. Pandas, NumPy, ML libraries)
• Experience working with real-world, messy datasets
• Ability to work autonomously in a fast-paced environment

Nice to have:

• Experience in mobile apps, subscription products or growth analytics
• Exposure to experimentation / A/B testing environments
• Experience working in early-stage startups
• Familiarity with building scalable ML systems or pipelines
• Commercial mindset - understanding how models impact revenue

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