Senior Product Designer (Growth) @ Seed Stage HealthTech, Berlin

This is an Atlantic portfolio venture. Find out more about us and other opportunities in our portfolio here.

About the Venture

Imagine this: You're dealing with diabetes, and your doctor's appointment was three weeks ago. You have questions, concerns, maybe your medication isn't feeling right. But your next appointment isn't for another two months. You're left wondering, wondering, navigating your health journey alone. This is the reality for millions of people with chronic conditions. And this is exactly what we're changing.

Doctor.One is a Polish health‑tech startup that just raised $4M (led by Germany's top healthcare investor, YZR Capital) because we're solving something that matters deeply. We've built a mobile app that keeps doctors and patients connected between visits through ongoing, personal conversations. Think of it as turning healthcare from those rushed, once‑in‑a‑while appointments into real, continuous relationships where patients never have to face their health challenges alone.

Here's what we believe: In a world racing toward AI and automation, healthcare should remain human. Because when you're scared about your or your loved ones’ health, you don't need a chatbot—you need a real person who knows you, cares about you, and can guide you with both medical expertise and genuine empathy.

We're 25 people on a mission to bring back the human touch to medicine. Every chronic patient deserves to feel supported, understood, and never alone on their health journey.

Does this spark something in you? Keep reading.

About the Growth team

Over 3,500 doctors are already using our app, and we're just getting started.

We're building our growth team from the ground up, and you'd be the very first person to join this adventure. You'll work directly with our Head of Growth and the leadership team, helping shape our growth strategy from day one.

Here's the challenge: We're growing a two‑sided marketplace where doctors and patients build real relationships. Your job? Figure out how to help more doctors discover us, get them excited about using the app and inviting more patients to it, and create those magical moments that make both doctors and patients think, “I can't imagine going back to the old way.”

Since growth is a multidisciplinary effort, our team will bring together people with different superpowers, but we're all united by one obsession: optimizing retention and activating virality loops to make sure no one faces their health journey alone.

What You’ll Do

As a Growth Product Designer you will be the founding member of the Growth team and a strategic contributor to the product development & optimization process. Your focus will be on connecting user (HCP and patient) needs to driving measurable business growth through pathfinding, experimentation and optimization of the entire end‑to‑end user (HCP and patient) journey.

In plain English: you'll be the person who looks at our app and asks, “How can we make this so good that doctors can't help but tell other doctors about it and invite more patients to use the app?” and “How do we make patients feel so supported that they trust us with their most personal health concerns?”

• Owning and executing growth initiatives
• Design experiments that foster activation, habit loops and network effects for example:
• Self‑serve onboarding experiences that minimize friction and maximize user activation.
• In‑product experiences that encourage feature adoption and drive expansion revenue.
• Referral programs, sharing mechanisms, and viral features that promote organic growth.
• Take complex challenges and turn them into approachable features through ideation, research, experimentation and testing.
• Hunt down every friction point that stops doctors or patients from getting value and getting it quickly.
• Designing
• Design everything from low and high fidelity interfaces and prototypes using Figma.
• Team up with other designers to make sure our product feels cohesive and follows the product vision and design goals.
• Collaborating across functions
• Work with product managers and engineers to work through technical tradeoffs that affect product roadmaps.
• Align across multiple product areas to make the user experience clearer and easier.
• Your Success Metrics
• Increase in user acquisition, activation and time‑to‑value metrics
• Positive impact on revenue growth and monetization metrics
• Successful launch and iteration of growth experiments

About You

You are likely to thrive in this role if:

• You've done product and/or growth design before - You know what it's like to be responsible for making mobile apps grow preferably in B2B2C model, SaaS and health‑tech.
• You are used to fast pace working environment - You have been part of a Seed to Series B+ start up journey.
• Numbers don't scare you - You're comfortable with A/B tests, multivariate testing, regression and correlation analysis, user research, and data‑driven design.
• You are creative - you have a deep understanding of human‑centered design and are comfortable with prototyping and UX/UI design principles.
• You are curious and experimental - you have experience with executing growth experiments to improve the acquisition, activation, retention and monetization and building scalable experimentation frameworks focused on rapid iteration and learning.
• You are fluent in AI‑powered design - you follow how AI is changing product design, you've experimented with AI tools, and you're eager to explore how we can use AI to enhance both our design process and our product.
• You are challenger and eager to take on anything - you're not satisfied with “that's how we've always done it” and you're excited to tackle new challenges head‑on.
• You are a great teammate - you have good communication and collaboration skills and are capable of clearly translating complex data insights into actionable strategies.

Why Join?

• Your work saves lives - Literally. Better communication between doctors and patients leads to better health outcomes.
• You're shaping the future of healthcare - In 10 years, people will look back at the old model of episodic care and wonder how we ever thought that was enough.
• You're getting in early - As the first growth team member, you'll have enormous influence over our direction and opportunities to advance.