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Kevin Barrios

@kevin-barrios

Full Stack Developer, 3 years. Built UpperDS, a hotel signage SaaS with 300+ live screens, and the AI bot platform at CallBotIA (voice, WhatsApp, webc

Argentina

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What I'm looking for

I'm available immediately for remote contract or full-time roles with teams in the US, Europe, or LATAM.

I built UpperDS end to end at Adbize, a digital signage SaaS for hotels, and continued maintaining it as an independent contractor. It runs across 300+ live screens, with 27 Cloud Functions and Lighthouse scores of 97–100.

At CallBotIA™ Spain, I built conversational automation solutions, including an embeddable chat widget, an admin dashboard, and voice and text agents. I also developed the UpperDS TV app for Android TV, where a media cache cut Firebase bandwidth by 90%.

Experience

Work history, roles, and key accomplishments

Full Stack Developer

CallBotIA™ Spain

Dec 2025 - Aug 2026 (8 months)

Built AI-powered conversational automation solutions (voice bots, WhatsApp bots, chat bots) for mid-size and enterprise clients across Latin America.
• Built and deployed a scalable chat widget system using Cloudflare Workers, enabling rapid client onboarding through embeddable integrations
• Designed and built a full-stack admin dashboard with Firebase for customer management, service activation

Full Stack Developer

Adbize

Aug 2023 - Nov 2025 (2 years 3 months)

Web agency. Worked across the full range of client work: SaaS products, e-commerce, corporate sites and legacy systems.
• UpperDS (Feb 2024 onward, main assignment): digital signage SaaS for hotels, built end to end. Next.js, TypeScript, Firebase. 300+ live screens across multiple hotel clients, 27 Cloud Functions, 4 external APIs, i18n in 3 languages, Lighthouse 97–100.
• UpperDS TV app: React