Senior Product Designer (Freelance)

WELLTECH; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

Welltech is seeking a Senior Product Designer to own end-to-end experiences across Muscle Booster, Yoga-Go, and WalkFit, from onboarding funnels to app experiences. You will collaborate with Growth to drive experiments, optimize onboarding, and increase conversion and AOV.

You will work with cross-functional teams—PMs, engineers, researchers—to design visual interfaces, apply design systems, and use analytics (Amplitude, Tableau) to inform decisions and improve retention and engagement.

Qualifications

• Exceptional visual design skills and proficiency with Figma.
• Strong experience using and iterating on existing Design Systems.
• Proven experience designing mobile apps for both Apple and Android with Marketing collaboration.
• Comfortable using analytics and data-driven experimentation to guide product improvements (Amplitude, Tableau).
• Ability to run usability tests on Maze or a similar platform.
• Strong collaboration with cross-functional teams including Product Managers, Engineers, Content Designers and User Researchers.
• Understanding of user psychology, behavioral design, and principles behind highly-converting user interfaces and habit-forming products.
• Independent yet collaborative work style, actively contributing to team development and culture.
• AI experimentator: always trying out new tools to improve your design workflow.

Responsibilities

• Work with Product Management and Engineering prioritising and scoping the roadmap and upcoming initiatives.
• Contribute to end-to-end design processes, from user research and wireframing to high-fidelity visual designs and prototypes.
• Work iteratively through design experiments across onboarding and app experience.
• Design visually appealing, user-centered interfaces adhering to both Apple and Android design guidelines.
• Execute design projects autonomously while actively contributing to collaborative ideation and design critiques.
• Use product analytics and experimentation to inform design decisions, improving conversion, user retention and engagement.
• Collaborate closely within our team of designers, product managers, engineers, and researchers to deliver intuitive user experiences that drive business results.

Skills

Visual design

UI/UX design

Design systems

Cross-functional collaboration

Experimentation

Tools

Figma

Amplitude

Tableau

Maze

Great Question

Job description

Who We Are

Welltech is a global wellness technology company with Ukrainian roots. Our mission is to build and scale wellness apps globally through state-of-the-art, tech-driven performance marketing.

We are one of the most established players in the wellness app space, and we are accelerating. Over 25.5 million people across the world use our apps — Muscle Booster, Yoga-Go, and WalkFit — to build healthier habits, move more, and feel better every day. Every subscription represents a real person making a real change in their life, and we take that seriously.

With 500+ people across hubs in Cyprus, Ukraine, Poland, Spain, and the UK, we combine the scale of a market leader and the drive of a team that's just getting started.

What we’re looking for

As a Senior Product Designer, you'll be working on end to end experiences, from onboarding funnels to app experiences, across one of our flagship apps - Muscle Booster, YogaGo and WalkFit. You will work closely with Growth, driving experimentation across our funnels, optimising the onboarding experience and running continuous iterations to increase conversion and average order value. You will also work on user engagement and retention, integrating exciting new features like nutrition guidance, and deepening the overall value our users get from the app.

Key Responsibilities

• Working closely with Product Management and Engineering prioritising and scoping the roadmap and upcoming initiatives

• Contribute to end-to-end design processes, from user research and wireframing to high-fidelity visual designs and prototypes.

• Work iteratively through design experiments across onboarding and app experience

• Design visually appealing, user-centered interfaces adhering to both Apple and Android design guidelines.

• Execute design projects autonomously while actively contributing to collaborative ideation and design critiques.

• Use product analytics and experimentation to inform design decisions, improving conversion, user retention and engagement.

• Collaborate closely within our team of designers, product managers, engineers, and researchers to deliver intuitive user experiences that drive business results.

Skills and Experience Required:

• Exceptional visual design skills and proficiency with Figma (components, auto-layouts, variables).

• Strong experience using and iterating on existing Design Systems.

• Proven experience working with Marketing as well as designing mobile applications for both Apple and Android platforms.

• Comfortable using analytics and data-driven experimentation to guide product improvements (Amplitude, Tableau, …)

• Ability to gather and make sense of existing research and assumptions to design experiments, using a combination of qualitative and quantitative insights.

• Experience in running usability tests on Maze, Great Question or a similar platform.

• Strong collaborative skills, deeply integrating with cross-functional teams - including Product Managers, Engineers, Content Designers and User Researchers.

• Understanding of user psychology, behavioral design, and principles behind highly-converting user interfaces and habit-forming products.

• Independent yet collaborative work style, actively contributing to team development and culture.

• AI experimentator: always trying out new tools to improve your design workflow, from idea to handover.

Nice to have:

• Experience in health, fitness, nutrition, or wellness sectors.

Why Join Us

• Impact: Play a central role in shaping a globally influential product.

• Growth: Join a supportive team environment dedicated to your professional and personal development.

• Innovation: Be part of a culture that values experimentation, innovation, and positive social impact.

Muscle Booster — https://musclebooster.fitness/

Yoga-Go — https://yoga-go.io/

WalkFit — http://walkfit.pro