Hi👋🏼, I'm Reuben. I design complex digital products, turning dense workflows and data-heavy systems into experiences people understand.
I'm Callum Hayes,
a UX/UI designer specializing in creating user-friendly mobile apps based in London, UK.
From scalable design systems to intelligent prototyping, I turn complex challenges into clear, intuitive experiences. I work end-to-end: research, information architecture, interaction design, prototyping, design systems, and production handoff.
Featured works
A selection of enterprise products, design systems, and workflow-driven experiences built for real-world complexity
Expert feedback
Read insights and praises from mentors and peers who have guided and witnessed my professional growth.
Rash
Senior Manager at Deloitte
"Reuben consistently demonstrated exceptional creativity and a deep understanding of user-centric design principles. His projects were not only aesthetically pleasing but also showcased practical functionality that exceeded expectations."
Bobo Civiya
Manager at Deloitte
"Reuben has an extraordinary talent for translating complex concepts into visually appealing and intuitive designs. Working alongside him, I was impressed by his ability to seamlessly integrate feedback and push the boundaries of what's possible in digital design."
Brooks
Selerix
"Reuben impressed us with his dedication and innovative approach to UX/UI design. His commitment to user-centered principles significantly contributed to our project's success. His ability to quickly apply feedback and his passion for design trends mark him as a standout talent in the field."
Rash
Senior Manager at Deloitte
"Reuben consistently demonstrated exceptional creativity and a deep understanding of user-centric design principles. His projects were not only aesthetically pleasing but also showcased practical functionality that exceeded expectations."
Bobo Civiya
Manager at Deloitte
"Reuben has an extraordinary talent for translating complex concepts into visually appealing and intuitive designs. Working alongside him, I was impressed by his ability to seamlessly integrate feedback and push the boundaries of what's possible in digital design."
Brooks
Selerix
"Reuben impressed us with his dedication and innovative approach to UX/UI design. His commitment to user-centered principles significantly contributed to our project's success. His ability to quickly apply feedback and his passion for design trends mark him as a standout talent in the field."
Rash
Senior Manager at Deloitte
"Reuben consistently demonstrated exceptional creativity and a deep understanding of user-centric design principles. His projects were not only aesthetically pleasing but also showcased practical functionality that exceeded expectations."
Bobo Civiya
Manager at Deloitte
"Reuben has an extraordinary talent for translating complex concepts into visually appealing and intuitive designs. Working alongside him, I was impressed by his ability to seamlessly integrate feedback and push the boundaries of what's possible in digital design."
Brooks
Selerix
"Reuben impressed us with his dedication and innovative approach to UX/UI design. His commitment to user-centered principles significantly contributed to our project's success. His ability to quickly apply feedback and his passion for design trends mark him as a standout talent in the field."
Rash
Senior Manager at Deloitte
"Reuben consistently demonstrated exceptional creativity and a deep understanding of user-centric design principles. His projects were not only aesthetically pleasing but also showcased practical functionality that exceeded expectations."
Bobo Civiya
Manager at Deloitte
"Reuben has an extraordinary talent for translating complex concepts into visually appealing and intuitive designs. Working alongside him, I was impressed by his ability to seamlessly integrate feedback and push the boundaries of what's possible in digital design."
Brooks
Selerix
"Reuben impressed us with his dedication and innovative approach to UX/UI design. His commitment to user-centered principles significantly contributed to our project's success. His ability to quickly apply feedback and his passion for design trends mark him as a standout talent in the field."
Rash
Senior Manager at Deloitte
"Reuben consistently demonstrated exceptional creativity and a deep understanding of user-centric design principles. His projects were not only aesthetically pleasing but also showcased practical functionality that exceeded expectations."
Bobo Civiya
Manager at Deloitte
"Reuben has an extraordinary talent for translating complex concepts into visually appealing and intuitive designs. Working alongside him, I was impressed by his ability to seamlessly integrate feedback and push the boundaries of what's possible in digital design."
Brooks
Selerix
"Reuben impressed us with his dedication and innovative approach to UX/UI design. His commitment to user-centered principles significantly contributed to our project's success. His ability to quickly apply feedback and his passion for design trends mark him as a standout talent in the field."
Rash
Senior Manager at Deloitte
"Reuben consistently demonstrated exceptional creativity and a deep understanding of user-centric design principles. His projects were not only aesthetically pleasing but also showcased practical functionality that exceeded expectations."
Bobo Civiya
Manager at Deloitte
"Reuben has an extraordinary talent for translating complex concepts into visually appealing and intuitive designs. Working alongside him, I was impressed by his ability to seamlessly integrate feedback and push the boundaries of what's possible in digital design."
Brooks
Selerix
"Reuben impressed us with his dedication and innovative approach to UX/UI design. His commitment to user-centered principles significantly contributed to our project's success. His ability to quickly apply feedback and his passion for design trends mark him as a standout talent in the field."
Rash
Senior Manager at Deloitte
"Reuben consistently demonstrated exceptional creativity and a deep understanding of user-centric design principles. His projects were not only aesthetically pleasing but also showcased practical functionality that exceeded expectations."
Bobo Civiya
Manager at Deloitte
"Reuben has an extraordinary talent for translating complex concepts into visually appealing and intuitive designs. Working alongside him, I was impressed by his ability to seamlessly integrate feedback and push the boundaries of what's possible in digital design."
Brooks
Selerix
"Reuben impressed us with his dedication and innovative approach to UX/UI design. His commitment to user-centered principles significantly contributed to our project's success. His ability to quickly apply feedback and his passion for design trends mark him as a standout talent in the field."
Rash
Senior Manager at Deloitte
"Reuben consistently demonstrated exceptional creativity and a deep understanding of user-centric design principles. His projects were not only aesthetically pleasing but also showcased practical functionality that exceeded expectations."
Bobo Civiya
Manager at Deloitte
"Reuben has an extraordinary talent for translating complex concepts into visually appealing and intuitive designs. Working alongside him, I was impressed by his ability to seamlessly integrate feedback and push the boundaries of what's possible in digital design."
Brooks
Selerix
"Reuben impressed us with his dedication and innovative approach to UX/UI design. His commitment to user-centered principles significantly contributed to our project's success. His ability to quickly apply feedback and his passion for design trends mark him as a standout talent in the field."
Let's talk about your next big idea.
Whether it's a new role, a collaboration, or just geeking out about UX, I'd love to hear from you
Let's talk about your next big idea.
Whether it's a new role, a collaboration, or just geeking out about UX, I'd love to hear from you
Let's talk about your next big idea.
Whether it's a new role, a collaboration, or just geeking out about UX, I'd love to hear from you
Copyright 2026
Copyright 2026
Copyright 2026