Data Scientist
Salary: £85,000 – £95,000 + EquityLocation: 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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