Jason Fonseca is a product designer who turns complex problems, early ideas and messy systems into clear, usable experiences used by millions.

Jason played a pivotal role in shaping our product and design direction.

He consistently turned complex flows and requirements into elegant, thoughtful designs with minimal guidance.

Enabling us to launch polished, high-impact experiences at incredible speed.

River MistExecutive, Emerging Products

Working with Jason has been a fantastic experience. They quickly understood the design style we were aiming for and was able to deliver high-quality work that fit well with our brand.

Communication was always smooth and fast, and they showed great flexibility, whether it was taking on additional tasks or changing drafted designs.

I’ve been very pleased with their work and would highly recommend Jason.

Marco Van De HeuvelCo-Founder & CEO

Jason was fantastic to work with on the redesign of our product. We came into the engagement a bit lost on how to help users take advantage of the power of our platform in a simple way without overwhelming them - a hard task.

Jason was the perfect fit for helping us think through this, iterating very fast on different ideas before landing on the newly redesigned UI/UX. Our product is now much clearer and easier to use, and Jason was a huge part of that. I highly recommend working with him.

Jimmy McDermottFounder

Jason exceeded my expectations with their ability to research, conceptualize, and deliver detailed UX flows for web and mobile applications. Their expertise in design systems made development handoffs seamless, and their skill in crafting user-centric solutions was truly impressive. Their speed, attention to detail, and passion for problem-solving make them a valuable partner for any UI/UX project.

Highly recommended for development teams, product leads, and businesses.

Abdul RafiqDirector & Head of Design

Jason didn't just make things look good, but shaped the product itself.

Their strategic direction on UX and UI transformed the app into something more intuitive, engaging, and unique than we had imagined at the start.

We can't recommend Jason enough. The speed, creativity, and clarity make them an incredible partner for every project.

Brian DoranHead of Product

Having a designer that just acts is easy.

But having a designer that suggests features and pushes the product forward is something Jason has done time and time again.

Alexandre BourjadeCo-Founder & COO

Jason built our entire product from scratch while our vision kept evolving. Every time we shifted, they didn't just adapt, they helped shape what the new direction should look like.

It never felt we're working with an external partner, but rather like having a design co-founder in the room.

I'd refer any founder building from zero to Jason, they're the kind of partners that make your product actually happen.

Siddarth VermaCTO

Jason is one of the most talented designers I’ve ever worked with. He quickly understood our complex product and customer needs, then translated that understanding into high-fidelity prototypes almost immediately.

His speed and fluency in design allowed us to collaborate in real time, blending low-effort wireframes with refined mockups in a single iteration cycle. Thanks to Jason’s work, we were able to move faster than ever and jump into development with confidence.

Danan MargasonFounder