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Grounded in science,
shaped by real life

We combine pediatric sleep expertise with developmental science
to build guidance that supports families through every stage.

The story behind Mellow Kids

When I became a mother, I experienced how fragile sleep can be, and how overwhelming the advice around it often is. I followed the recommended courses and methods, but they felt rigid and disconnected from real life.

What struck me most was how sleep was treated in isolation. Developmental stages, emotional growth, and cognitive leaps were rarely considered. Even though they directly impact how a child sleeps.

With a background in user experience design, I immersed myself in sleep science and child development, ultimately becoming certified Pediatric Sleep. Supporting families one-on-one revealed a clear pattern: parents didn’t need more generic tracking and advice. They needed personalized, just-in-time guidance that adapts as their child grows.

That belief became the foundation of Mellow Kids.

— Daiany Nascimento
Founder & CEO | Certified Pediatric Sleep Specialist

Dai and Olivia
Mauricio and family

When it became personal

As a father of two, sleep was not theoretical. It shaped our everyday life.

Our first child struggled with sleep for more than two years. We tried courses, methods, and advice from every direction. At one point, we were even offered medical interventions that did not address what we felt was truly happening. It was exhausting and, at times, discouraging.

That experience left a lasting impression on me. I saw how easily families can feel lost between conflicting recommendations, quick fixes, and solutions that do not fit their child.

When I learned about what Mellow was building, I immediately recognized the need. This wasn’t just another app. It was a mission close to my heart and one I wanted to help shape.

With my background in technology and product development, I co-founded Mellow Kids to build something we wished had existed for our own family.

— Mauricio Vargas
Co-Founder & CTO

Meet our team

Daiany 1
Daiany Nascimento

Founder & CEO

Mom to Olivia

Mauricio Vargas
Mauricio Vargas

Co-founder & CTO

Dad to Logan and Charlie

Luiz Carvalho
Luiz Carvalho

Lead Developer

Dad to Erva Doce 🐈 and Homer 🐕

Letizia Sorrentino
Letizia Sorrentino

Frontend Developer

Mom to Jaya and Ayan

Arzu Guney
Arzu Guney

Full-stack Developer

Mom to two girls

Our advisors

Mary Ann-1
Mary Ann Nero
Clinical Advisor | Registered Nurse (Pediatrics & Obstetrics)
Sophia
Sophia Westrich
COO & Strategic Advisor
Rajani
Rajani Rao
ML & AI Advisor

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