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Staff Product Designer and UX Technical Lead with 10+ years of experience executing technical design, UI architecture, and strategic problem-solving for data-dense interfaces. Expert in accelerating delivery through high-fidelity prototyping, heuristic validation, and direct AI integrations (Cursor, Claude, Figma MCPs). Proven ability to lead by influence, architecting design systems used by 35+ designers and delivering 98/100 execution metrics in high-scale marketplaces like Mercado Libre.…Staff Product Designer and UX Technical Lead with 10+ years of experience executing technical design, UI architecture, and strategic problem-solving for data-dense interfaces. Expert in accelerating delivery through high-fidelity prototyping, heuristic validation, and direct AI integrations (Cursor, Claude, Figma MCPs). Proven ability to lead by influence, architecting design systems used by 35+ designers and delivering 98/100 execution metrics in high-scale marketplaces like Mercado Libre.

Jeff León

Product Designer, Designer, UI Designer, +3

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Staff Product Designer and UX Technical Lead with 10+ years of experience executing technical design, UI architecture, and strategic problem-solving for data-dense interfaces. Expert in accelerating delivery through high-fidelity prototyping, heuristic validation, and direct AI integrations (Cursor, Claude, Figma MCPs). Proven ability to lead by influence, architecting design systems used by 35+ designers and delivering 98/100 execution metrics in high-scale marketplaces like Mercado Libre.…Staff Product Designer and UX Technical Lead with 10+ years of experience executing technical design, UI architecture, and strategic problem-solving for data-dense interfaces. Expert in accelerating delivery through high-fidelity prototyping, heuristic validation, and direct AI integrations (Cursor, Claude, Figma MCPs). Proven ability to lead by influence, architecting design systems used by 35+ designers and delivering 98/100 execution metrics in high-scale marketplaces like Mercado Libre.

Available to hire

Staff Product Designer and UX Technical Lead with 10+ years of experience executing technical design, UI architecture, and strategic problem-solving for data-dense interfaces. Expert in accelerating delivery through high-fidelity prototyping, heuristic validation, and direct AI integrations (Cursor, Claude, Figma MCPs). Proven ability to lead by influence, architecting design systems used by 35+ designers and delivering 98/100 execution metrics in high-scale marketplaces like Mercado Libre.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Spanish; Castilian

Fluent

Work Experience

UX Manager / Technical Lead at Mercado Libre

January 1, 2022 - December 31, 2025

Led high-fidelity prototyping and AI-driven design workflows; implemented design-to-code parity using MCPs with Claude, Cursor, and Figm a Make to ensure 100% consistency with the design system and reduce handoffs. Directed the technical output of 19 designers, achieving a 98/100 execution score and 100/100 team engagement against company targets; contributed to data-sense interfaces for fintech and e-commerce workflows.

Product Design Lead / UX Consultant

January 1, 2016 - December 31, 2022

Experience Design leadership for fintech and onboarding initiatives; built scalable design systems across a first-party unit; improved catalog load speed by 80% and inventory availability by 45%; drove AI-assisted UI solutions for data scraping and auto-filled fields.

Co-founder / UX Strategy Advisor at León & Leal

January 1, 2009 - Present

Led technical design projects for major clients; defined information architecture and digital experience strategies for mid-market and SME clients.

Product Designer & UX Technical Lead at Mercado Libre

January 1, 2016 - January 1, 2022

Delivered UI solutions for data scraping and automatic catalog filling; established system foundations for onboarding and growth; led a 14-designer practice, driving adoption and retention metrics for the Punto Colombia app.