Freelancers using Vercel in MadridFreelancers using Vercel in Madrid
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Berckan Guerrero's avatar
Berckan Guerrero
proMadrid, Spain
Founders' Tech Partner | Full-Stack AI Engineer | 14 yrs exp
$50k+
Earned
9x
Hired
5.0
Rating
28
Followers
Founders' Tech Partner | Full-Stack AI Engineer | 14 yrs exp
Cover image for NurvAI: Website Redesign & Development
NurvAI: Website Redesign & Development
3
19
Cover image for SpeedDoc: AI-powered web performance optimization
SpeedDoc: AI-powered web performance optimization tool that scans websites, diagnoses bottlenecks, and generates ready-to-implement fix code. Not generic Lighthouse advice: actual code patches developers can copy and apply directly to their codebase. Built as part of a Vercel AI Accelerator application. Scans run against live URLs, identify specific performance issues (render-blocking resources, unoptimized images, layout shifts), and return targeted fixes with before/after impact estimates. Next.js 16, TypeScript, Tailwind 4, Vercel. Personal project.
1
1.8K
Cover image for Personal portfolio built with Astro
Personal portfolio built with Astro 5 and Vue 3 using Islands architecture. Only interactive components ship JavaScript, everything else is zero-JS static HTML. Project data lives in TypeScript files with no CMS or external API calls at build time. Trilingual (EN/ES/FR) with custom i18n routing and per-locale static generation. Lazy-loaded video previews with intersection observer playback and WebP poster frames. Mouse-following parallax effect on project cards with reduced-motion support. Full dark mode with system preference detection and manual toggle. Perfect 100 across all four Lighthouse categories (Performance, Accessibility, Best Practices, SEO). 72% asset reduction (97MB ‚Üí 27MB). WCAG AA compliant. Playwright E2E testing across all routes and breakpoints.
1
447
Cover image for AxiDerm: Clinical Decision Tools for Veterinary Dermatology
AxiDerm: Clinical Decision Tools for Veterinary Dermatology
1
2
2
Vercel(3)
Mauricio Cornejo's avatar
Mauricio Cornejo
proMadrid, Spain
Product and Web Design for Tech Startups
1x
Hired
5.0
Rating
6
Followers
Product and Web Design for Tech Startups
Cover image for Web redesign for an AI platform for B2B sales
Web redesign for an AI platform for B2B sales
1
15
Cover image for COACHED is a platform that
COACHED is a platform that helps independent tennis coaches eliminate the back-and-forth of coordinating lessons, courts, payments and scheduling. 🎾 Each coach gets a personal booking link where clients can see their availability, find available courts, choose a date and time, and book and pay for a session in one simple flow. Prototype: https://build-your-dream-site-771.lovable.app/ Demo video: https://www.loom.com/share/1a3169b6669d40c1a928b8a217aff638 Post link: https://lnkd.in/p/eHpW-8jV Process walkthrough link: https://www.loom.com/share/e7534b718d4543b9a42c5ad570af4713
1
163
Cover image for Hero concept for Phished, cybersecurity training platform
Hero concept for Phished, cybersecurity training platform
0
6
Cover image for SaaS Platform Redesign for GTM Execution
SaaS Platform Redesign for GTM Execution
0
25
Vercel(1)
Kai Relaunch Dept's avatar
Kai Relaunch Dept
Madrid, Spain
AI Automation & Launch Recovery Specialist
New to Contra
AI Automation & Launch Recovery Specialist
Cover image for SchemaShield — Evidence-First Schema Change Preflight
SchemaShield — Evidence-First Schema Change Preflight
0
12
Cover image for ScenarioReceipt: Evidence-Grounded Product UI
ScenarioReceipt: Evidence-Grounded Product UI
0
9
Cover image for A schema rename passed every unit test. It still broke a rev...
A schema rename passed every unit test. It still broke a revenue dashboard. The query changed from order_total to gross_amount; the schema was valid, but downstream models still expected the old field. The fix isn't another linter. Before merge, ask four questions: Which assets depend on this field? Is the change additive, rename, type change, or removal? Can we generate compatibility SQL and dbt YAML before touching production? Is there a decision receipt reviewers can reproduce? I built a bounded public replay of that workflow. Start with the CRITICAL case: it blocks a lossy decimal-to-integer change when an ML consumer sits downstream, then exposes the lineage, affected queries, compatibility artifacts, and deterministic run ID. Demo: https://schema-shield.vercel.app (https://schema-shield.vercel.app)Source/evidence: https://github.com/ceodaradigu/schema-shield What schema operation should the next fixture cover? AI-assisted analysis, reviewed before publication by RELAUNCH DEPT.
0
94
Cover image for Proofline Keeper — Transaction Firewall for AI Agents
Proofline Keeper — Transaction Firewall for AI Agents
0
9
Vercel(1)
Pedro Molina's avatar
Pedro Molina
Madrid, Spain
Fullstack Engineer: AI-Driven Solutions
12
Followers
Fullstack Engineer: AI-Driven Solutions
Cover image for Tequeño Studios | Agencia Digital Creativa
Tequeño Studios | Agencia Digital Creativa
0
5
Cover image for Pekebyte.com
Pekebyte.com
0
6
Cover image for Size Wizard - Shopify App
Size Wizard - Shopify App
0
7
Cover image for Dietmind: AI Meal prep planner
Dietmind: AI Meal prep planner
0
7
Vercel(2)
Miguel Varona's avatar
Miguel Varona
Madrid, Spain
Full Stack Dev — SaaS, dashboards & AI integrations
New to Contra
Full Stack Dev — SaaS, dashboards & AI integrations
Cover image for Bookarta — all-in-one SaaS for
Bookarta — all-in-one SaaS for restaurants: intuitive digital menus and a 24/7 booking system in one place, manageable from any device. In production with active clients and recurring revenue. Built end-to-end at WEARECAPA with Next.js, Supabase and Stripe.
0
60
Cover image for II AMAE Awards — institutional
II AMAE Awards — institutional platform / awards system for audiovisual awards, with public submissions, a review dashboard and a members' voting portal. Built end-to-end at WEARECAPA with Next.js and Supabase, running in production with multiple user roles.
0
60
Cover image for RENEW — Health & Longevity.
RENEW — Health & Longevity. Editorial website (renew-habits.com (https://renew-habits.com)) covering nutrition, biohacking and wellness. Designed and built end-to-end at WEARECAPA with Next.js: clean editorial layout, structured content hub and a fully responsive reading experience.
0
64
Cover image for Portfolio website for Cristina Gómez,
Portfolio website for Cristina Gómez, video editor & post-production coordinator (criagova.org). Designed and built end-to-end at WEARECAPA with Next.js — responsive, fast and pixel-perfect, with a curated showcase of her commercial and film work.
2
75
Vercel(1)
Esteban Simón's avatar
Esteban Simón
Madrid, Spain
CTO & CPO | Technical Leadership, Digital Product
CTO & CPO | Technical Leadership, Digital Product
Cover image for CTO & CPO - B2B SaaS web app
CTO & CPO - B2B SaaS web app
0
25
Cover image for CTO & CPO - marketplace app
CTO & CPO - marketplace app
0
21
Cover image for CTO & CPO consulting for B2C E-commerce Startup app
CTO & CPO consulting for B2C E-commerce Startup app
0
30
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