App Optimisation & Experimentation Consultant

Company: La Fosse
Apply for the App Optimisation & Experimentation Consultant
Location: London
Job Description:

We’re partnering with a highly successful, design-led mobile app business looking for an experienced Optimisation & Experimentation Consultant to help establish a mature experimentation capability across their consumer app portfolio.

Historically, experimentation and A/B testing have been carried out on an ad hoc basis, and they’re now looking for a specialist to assess the current approach, implement best practices, and leave behind a scalable experimentation framework that can be adopted by the wider team.

Responsibilities

  • Assess the current experimentation and testing approach and recommend improvements
  • Design and implement a scalable experimentation framework and processes
  • Configure and optimise Firebase experimentation capabilities
  • Build and manage a prioritised testing roadmap and experimentation backlog
  • Run and oversee A/B tests across onboarding journeys, feature releases, retention initiatives and user experience improvements
  • Analyse experiment results and translate insights into actionable recommendations
  • Work closely with Product Designers, Data Analysts, Engineers, QA and Marketing teams to deliver experiments effectively
  • Create sustainable documentation, processes and ways of working that will continue beyond the engagement
  • Proven experience leading experimentation, optimisation, growth and A/B testing initiatives within consumer mobile app businesses
  • Strong hands-on experience running end-to-end experimentation programmes
  • Experience with Firebase and mobile app experimentation tools
  • Deep understanding of user behaviour, onboarding, engagement and retention optimisation
  • Experience building experimentation frameworks and processes from scratch
  • Comfortable working cross-functionally with Design, Data and Engineering teams
  • Previous experience working within a mobile app business, app-focused consultancy, or digital product agency

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Posted: June 19th, 2026