F

Fabulous

Behavioral science-based habit-building app

Growth Engineer

Full-TimeUpdated on 10/23/2026
€24k - €30k
Mid
Bachelor's
Remote in Poland
RemoteFully remote role in Poland.
Software Engineering

About the job

Requirements
  • Has a background in software engineering.
  • Is very confident in JSON and Java or JavaScript; SQL is a bonus.
  • Is comfortable with statistical significance and common types of statistical bias.
  • Understands the basics of good experimental design.
  • Is passionate about growth, metrics, and providing an outstanding user experience.
  • Is data-driven and analytical, with the ability to find user patterns and leverage them to optimize key metrics and user experience.
Responsibilities
  • Support the entire experimentation process of the Growth team.
  • Code, analyze, and work across every facet of the Growth workstreams.
  • Collaborate with the Product Development team and the Data Science team.
  • Learn and train in the skills of growth product management and product management.
  • Peer-review Growth code and assist in code review for Growth experiments.
  • Assist with experiment launches on Google Firebase.
  • Debug code and work closely with the Product Development team.
  • Assist in quality assurance of new features prior to release.
  • Peer-review experiment analysis.
  • Own the translations of winning experiments into other languages and across platforms, and own this experimentation process from start to finish.
Desired Qualifications
  • Interest in behavioral science.
  • A bachelor's degree in statistics, computer science, engineering, any technical major, or related work experience.
  • Has designed and run A/B or randomized controlled trials before and understands the nuances of good experimental design.
  • Background in data science.
  • Background or interest in machine learning.

About the company

1) What it does: Fabulous is a wellness app that helps people build healthy habits and reach personal goals using principles from behavioral science. It serves a broad audience, including people who want self-improvement and those managing ADHD, and it operates on a subscription model with coaching, resources, and on-demand programs. 2) How it works: The app uses scientifically grounded methods to guide habit formation, offering personalized coaching sessions, a library of resources, and 24/7 access to on-demand series. Different subscription tiers give varying levels of access and support. 3) How it’s different: It combines an evidence-based approach with real-time coaching and a structured habit framework, setting it apart from generic self-help apps by delivering tailored coaching and resources built on behavioral science. 4) Goal: Its aim is to help people form lasting habits and achieve their personal goals by providing structured routines, practical guidance, and ongoing support.

Company Size

51-200

Company Stage

N/A

Total Funding

N/A

Headquarters

Paris, France

Founded

2013

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Simplify Jobs

Simplify's Take

What believers are saying

  • Google Play still shows active updates, signaling product investment on August 21, 2026.
  • August 2026 checkout offered a $1 trial and $39.99 every-two-months renewal.
  • PitchBook lists 85 employees and ongoing hiring, supporting continued execution in Paris.

What critics are saying

  • Google Play updated August 21, 2026; subscription churn remains a constant conversion threat.
  • Pay-what-you-want trials and upfront card capture invite consumer backlash and refund disputes.
  • HabitatZero and cloned coaching features face entrenched competition from Apple, Google, and AI assistants.

What makes Fabulous unique

  • Behavioral-science routines and coaching differentiate Fabulous from generic habit trackers.
  • The July 2026 weekly habit tracker fixes targets by habit frequency, not streaks.
  • Premium bundles coaching series, unlimited habits, and one-on-one support across mobile-first journeys.

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Benefits

  • Flexible Work Hours
  • Remote Work Options