Growth Manager - US

Massive Bio•,

5h•Remote

About The Position

Massive Bio is seeking a Growth Manager to own the acquisition and conversion of users across their AI-powered precision medicine platform. This role is hands-on and experiment-driven, focusing on scaling acquisition funnels in a fast-moving environment for a product with significant human impact. The target users are cancer patients and healthcare providers, and the conversion funnel involves stages from initial awareness through consent, medical record collection, clinical prescreening, and ultimately enrollment into a trial. While prior healthcare experience is not required, enthusiasm for learning a complex funnel and finding creative solutions is essential.

Requirements

3–6 years of experience in growth marketing, performance marketing, or user acquisition in a fast-paced, data-driven environment.
Demonstrated track record of designing and executing experiments that moved key business metrics (conversion, retention, revenue).
Strong understanding of full-funnel thinking: experience with conversion rates, cohort analysis, and unit economics.
Hands-on proficiency with analytics and experimentation tools (e.g., Google Analytics, Mixpanel, Amplitude, Optimizely, or equivalent).
Ability to work across both paid and organic acquisition channels with a systematic test-and-learn approach.
Excellent communication skills in English; comfortable presenting strategies and results to C-level leadership.
Self-starter who thrives with autonomy, moves fast, and is comfortable with ambiguity.

Nice To Haves

Background in gaming, consumer apps, marketplaces, or other high-velocity user acquisition environments.
Experience in healthcare, health-tech, or regulated industries.
Familiarity with multi-sided platforms (connecting multiple user types).
Working knowledge of SQL or data visualization tools.

Responsibilities

Own the full user acquisition funnel from first touchpoint to conversion.
Identify user drop-off points, form hypotheses, and run experiments to improve conversion at every stage.
Build and maintain growth dashboards tracking funnel performance, cohort behavior, and unit economics.
Optimize for quality of conversions, not just volume, understanding which channels and segments produce the highest-value users.
Design, launch, and measure rapid experiments across multiple channels including partnerships, organic and content marketing, community building, product-led growth, referral programs, and paid media.
Systematically explore and validate new acquisition channels, treating paid advertising as one tool among many.
Build a repeatable experimentation framework: hypothesis → test → measure → scale or stop.
Develop and own the growth strategy, aligning acquisition goals with business objectives in collaboration with the CEO and senior leadership.
Collaborate with product, operations, and engagement teams to ensure growth experiments are operationally feasible and user experience is seamless.
Provide strategic direction and coordination to team members involved in campaign execution and digital marketing.