Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hello! I’m Sergio Cuello, a UX/UI designer based in Luxembourg with experience leading digital projects and collaborating with cross-functional teams. I specialize in turning complex requirements into intuitive, branded interfaces, focusing on clean typography, consistency, and strong user experience. I enjoy applying design thinking to improve workflows and drive engagement across web and mobile products. I’m proficient with Figma, prototyping, and design systems, and I prioritize a user-centered, iterative process to deliver measurable improvements. I love partnering with clients and developers to ensure solutions are both visually appealing and technically feasible, always aiming to simplify interactions and elevate the overall product experience.…Hello! I’m Sergio Cuello, a UX/UI designer based in Luxembourg with experience leading digital projects and collaborating with cross-functional teams. I specialize in turning complex requirements into intuitive, branded interfaces, focusing on clean typography, consistency, and strong user experience. I enjoy applying design thinking to improve workflows and drive engagement across web and mobile products. I’m proficient with Figma, prototyping, and design systems, and I prioritize a user-centered, iterative process to deliver measurable improvements. I love partnering with clients and developers to ensure solutions are both visually appealing and technically feasible, always aiming to simplify interactions and elevate the overall product experience.

Sergio Cuello

UX Designer, UI Designer, Graphic Designer, +2





Hello! I’m Sergio Cuello, a UX/UI designer based in Luxembourg with experience leading digital projects and collaborating with cross-functional teams. I specialize in turning complex requirements into intuitive, branded interfaces, focusing on clean typography, consistency, and strong user experience. I enjoy applying design thinking to improve workflows and drive engagement across web and mobile products. I’m proficient with Figma, prototyping, and design systems, and I prioritize a user-centered, iterative process to deliver measurable improvements. I love partnering with clients and developers to ensure solutions are both visually appealing and technically feasible, always aiming to simplify interactions and elevate the overall product experience.…Hello! I’m Sergio Cuello, a UX/UI designer based in Luxembourg with experience leading digital projects and collaborating with cross-functional teams. I specialize in turning complex requirements into intuitive, branded interfaces, focusing on clean typography, consistency, and strong user experience. I enjoy applying design thinking to improve workflows and drive engagement across web and mobile products. I’m proficient with Figma, prototyping, and design systems, and I prioritize a user-centered, iterative process to deliver measurable improvements. I love partnering with clients and developers to ensure solutions are both visually appealing and technically feasible, always aiming to simplify interactions and elevate the overall product experience.

Available to hire

Hello! I’m Sergio Cuello, a UX/UI designer based in Luxembourg with experience leading digital projects and collaborating with cross-functional teams. I specialize in turning complex requirements into intuitive, branded interfaces, focusing on clean typography, consistency, and strong user experience. I enjoy applying design thinking to improve workflows and drive engagement across web and mobile products.

I’m proficient with Figma, prototyping, and design systems, and I prioritize a user-centered, iterative process to deliver measurable improvements. I love partnering with clients and developers to ensure solutions are both visually appealing and technically feasible, always aiming to simplify interactions and elevate the overall product experience.

Skills

Experience Level

Expert

Expert

Expert

Expert

Language

Spanish; Castilian

Fluent

English

Advanced

Italian

Advanced

French

Beginner

Work Experience

UX/UI Designer at Shokworks

October 1, 2022 - October 1, 2022

Designed and developed digital interfaces tailored to each client’s needs. Managed two projects in parallel, ensured deadlines and design goals were met. Applied Design Thinking to improve workflows and user experience. Communicated with clients to define requirements, present proposals, and iterate on solutions. Coordinated development phases with cross-functional teams.

UX/UI Designer at Habits.AI

July 1, 2022 - July 1, 2022

Led the entire design area, independently shaping the UX/UI of the mobile app. Planned and coordinated tasks with development and customer success teams to ensure alignment. Conducted user research and usability testing to improve the digital experience and engagement. Gained hands-on experience in gamification and behavioral design to motivate users. Interacted with clients to gather feedback and implement improvements. Managed multiple projects, meeting deadlines and business objectives. Improved NPS from 5.6 to 7 after redesigning the app. Designed and optimized a SaaS platform for B2B and B2C use, improving satisfaction and efficiency.

UX/UI Designer at Freelance

October 1, 2020 - November 15, 2025

Designed responsive interfaces for clients across Argentina and beyond. Developed web apps using Material Design and conducted heuristic analysis. Built wireframes and interactive prototypes following UX best practices. Collaborated directly with clients from discovery to delivery, delivering tailored UX solutions that improved satisfaction and usability.