I'm Călin,
Senior Product Designer

Portrait sketch of Călin Dodițoiu

I've spent the last 8+ years building scalable products tackling complex technical workflows, working closely with engineers to ship tools that people can rely on.

My experience spans B2B web and mobile products in areas including AI, healthcare, education, and government, with a focus on clarity, usability, and performance.

EXPLORE MY WORK

LEAD PRODUCT DESIGNER

Scaled FROM MVP → 30k+ users across 70+ orgs; 5× MRR

WEB APP, MOBILE APP, WEBSITE

2020 - PRESENT

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Medicai is a healthtech startup focused on building the infrastructure behind medical imaging workflows. I joined the team in 2020, just as the MVP was taking shape, and helped scale it into a platform now used by over 30,000 users across 70+ healthcare organizations.

My role covered end-to-end product design for both web and mobile, and everything from running research sessions with clinicians and patients to creating a design system that sped up delivery by around 60%.

On the growth side, I led the redesign and development of the marketing site, leading to a 3x rise in conversion rate.

A screenshot of the Vatis Tech app, showing the transcript editor in light mode
A screenshot of the Vatis Tech app showing the Vatis AI assistant in action
A screenshot of the Vatis Tech app, showing the Files section
A screenshot of the Vatis Tech API Dashboard, showing the Audio Summary feature
A screenshot of the Vatis Tech API Dashboard, showing the Audio Intelligence feature

LEAD DESIGNER (FREELANCE)

4× MRR, 3× organic traffic

WEB APP, WEBSITE

2023 - 2025

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Vatis Tech is an AI transcription start-up. I partnered with them in 2023 to turn a technical tool built by developers into something approachable and easy to use.

As a solo product designer, I led the complete product and website design efforts, simplifying the transcript editor, improving onboarding, and clarifying the value proposition. This drove a 4x increase in MRR, and boosted website-to-app conversion from 1% to 4%.

Three smartphone screens showing a health app: a home screen with test options, a guided forced expiratory test with a woman holding a phone, and test results with lung function and blood oxygen data.
Four smartphone screens showing step-by-step instructions for a forced expiratory test with a woman demonstrating each step: face centered, mouth forming an O shape, breathing in through nose, and breathing out to empty lungs.

LEAD PRODUCT DESIGNER

45 → 5 min screening time; 700+ USERS screened

MOBILE APP

2023 - 2024

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Eupnoos is a digital health startup working on AI-powered tools for respiratory diagnostics.

I led product design for the mobile app, which allows patients to perform clinical-grade lung tests right from their smartphones.

Collaborating closely with clinicians, researchers, and engineers, I designed testing flows, dashboards, and a cross-platform design system, always with a focus on medical accuracy and compliance.