Senior Data Scientist

Fyxer Limited
City of London
4 months ago
Applications closed

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Senior Data Scientist

Senior Data Scientist (GenAI)

Role & Reporting

  • Title: Senior Data Scientist
  • Hiring Manager: Marco, Data Lead
  • Location: Monday - Thursday in our Chancery Lane office (London), Friday remote.
  • Compensation: >£140 base plus equity.

About Us

Since launching in May 2024 we’ve grown to $20 million in ARR.


We’re building an AI executive assistant that handles emails, scheduling and follow-up, freeing people in client-facing roles to focus on their customers.


What We Value

We hire small numbers of exceptional people who want ownership and autonomy. You’ll be expected to work with urgency and intensity, but you’ll also gain responsibility quickly and see your work have a direct impact.


What You’ll Do

In short, you’ll own Fyxer AI’s data science capabilities — you’ll set the roadmap for high-impact business areas like marketing and retention, implement scalable solutions, and ensure stakeholders use data to make confident commercial decisions.



  • Build and refine predictive models on multi‑channel customer and usage data to drive product and marketing decisions.
  • Collaborate with engineering, marketing, sales and product teams to define KPIs, experiment with new algorithms and surface actionable insights that drive impact.
  • Maintain data infrastructure (BigQuery, dbt, Fivetran) and ensure data quality for reporting and self‑service analytics.
  • Develop a culture of data‑driven decision making and proactively suggest improvements to tools, processes and architecture.

About You

  • You use first principles to really understand the problem and build solutions that have real business impact.
  • You get frustrated just dealing with tickets and want to partner with businesses.
  • Experience working at a fast paced early‑stage tech company (<100 people).
  • Expert in SQL and comfortable with Python/R; experience building and deploying machine‑learning models.
  • Strong ability to transform messy data into production‑ready datasets and communicate technical findings to non‑technical stakeholders.

People that thrive at Fyxer

  • You want to build and have impact from the ground up.
  • You want to have unreasonable ownership of your own world.
  • You work hard, with intensity everyday & move incredibly quickly.
  • You always challenge the systems you’re in to be better.


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