UI/UX Designer
from Cali, Colombia
Psst, hey… Collaborating internationally…
I’m Sebastián Castillo, a passionate designer from Colombia with over 4 years of experience in creating impactful brands and digital products. I focus on transforming ideas into engaging, user-centered experiences that foster brand growth. Collaborating with businesses of all sizes worldwide, I strive to deliver meaningful and effective design solutions.
Multi-site visual refresh across external-facing platforms.
Brand-aligned interfaces under tight constraints.
Developer-ready components built for real use.
Design systems adapted into flexible, scalable layouts.
Strategic execution under tight timelines.
Full e-commerce website redesign.
Custom style tile and design system.
Homepage, PLP, and PDP refresh.
Competitive analysis and visual direction.
Modern UX and UI for a retail gift brand.
Development-ready handoff.
Shopify redesign with ongoing optimization.
Led UX, UI, CRO, and project management.
Focused on mobile, performance, and conversion.
Scalable design system and interfaces.
First project led with full responsibility.
Selected look and feel for the full website redesign.
Most of the components and screens across the site.
Five directions presented; mine was selected.
Typography direction that guided the final typeface.
Data-forward storytelling for a retirement brand.
Global corporate website redesign with Interbrand.
Brand-aligned UI for a century-old industrial leader.
Navigation architecture across business units.
Industry and outcome page templates.
Modular component library for scalable page building.
Website redesign for a global aerospace brand.
Polished visual design across core page templates.
Art direction and image selection.
Alternative design concepts presented to the client.
Custom internal project management tool.
Design system contributions for internal tools.
UX research, IA, wireframes, and UI design.
Dashboards for projects, clients, and tasks.
Scalable components and clean data tables.
Digital platform for home delivery and key access.
Mobile-first experience focused on clarity.
UI design for dashboards and warranty flows.
Design system contributions to guarantee consistency.
I create visual identities that translate brand values into clear, scalable systems across digital products and e-commerce platforms.
I build strategic brand identities that translate business vision into clear, consistent, and scalable visual systems across digital touchpoints.
I design and optimize e-commerce ecosystems focused on performance, scalability, and measurable business growth through UX and CRO.
I lead digital projects from strategy to launch, aligning design, development, and business goals through structured execution.
