José Guillén

José Guillén is a Tech Lead and Senior Software Developer at Designli, where he oversees the architecture and end-to-end delivery of web, desktop, and mobile software. With extensive engineering experience across modern stacks like TypeScript, React, Next.js, and AWS, José specializes in setting rigorous engineering standards, mentoring developers, and modernizing legacy systems. Readers will gain deep technical insights on how to maintain high-quality codebases through structured testing, clear documentation, and scalable development practices. Outside of the codebase, he is passionate about continuous learning and engineering excellence.

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The Designli blog.

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Non-Technical Founders AI

6 min read

Human-in-the-Loop AI: How Regulated Industries Implement AI Without Losing Accountability

Written by José Guillén, Jul 2, 2026

TL;DR:

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UX/UI Design Non-Technical Founders

10 min read

How Strategic UX-UI Design Drives Growth, Trust, and Scalable Products

Written by José Guillén, Mar 17, 2026

Your app isn’t just what it does; it’s how it feels. In SaaS, features get attention. UX/UI determines whether those features get used. A product can...

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