Freelancers using React in MadridFreelancers using React in Madrid
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Berckan Guerrero's avatar
Berckan Guerrero
pro
Madrid, Spain
14+ years building fast, accessible web apps. AI Friendly.
$5k+
Earned
5x
Hired
5.0
Rating
11
Followers
14+ years building fast, accessible web apps. AI Friendly.
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
743
Cover image for Pulso (https://heypulso.com): Marketing and sales
Pulso (https://heypulso.com): Marketing and sales website for a web health monitoring service targeting small businesses in Latin America and Europe. Astro 5 static site with Stripe integration (EUR, USD, CLP), geolocation-based currency detection, and Resend API for transactional emails. Trilingual (ES/EN/FR). Four user flows in one site: email campaign recipients see personalized context, organic visitors get a free check CTA, salespeople share payment links, self-service users browse pricing and buy. Contact form via Resend API. Conditional hero based on referral source. 6 pricing tiers from free reports to monthly maintenance. Tone calibrated for Latin American SMBs. Stripe for subscriptions and one-time payments. Currency auto-switches via visitor geolocation.
1
718
Cover image for Pulso (https://heypulso.com): Prospect intelligence platform
Pulso (https://heypulso.com): Prospect intelligence platform that scans 28,000+ websites, scores them across 15 health metrics, and manages outreach from discovery to conversion. Scanner engine audits domains: SSL, performance, security headers, vulnerabilities, malware detection, SEO, accessibility. Each domain scores out of 100. Operations dashboard with prospect tables, inline notes, contact popovers, archiving, AI-generated outreach emails, and detail panels with color-coded health breakdowns. Role-based auth. Automated outreach generates custom reports per prospect via API with actual scores and recommendations. 14 years of web maintenance and optimization went into the scoring logic. Every check reflects real patterns found across hundreds of sites. 40,000+ domains. 15 metrics. Sub-second queries. Under €5/month infra.
1
725
Cover image for Raven: AI-powered knowledge management app
Raven: AI-powered knowledge management app with notes, tasks, and built-in streaming chat. 34 components, 25 composables, 13 Supabase PostgreSQL tables with Row Level Security policies on every table. 12 AI functions including streaming responses, voice input, and automatic conversation titles via Gemini. Full i18n (EN/ES) with offline support and sync queue for unreliable connections. Real-time CRUD, folder organization, and workspace-based content separation. Auth via Supabase with RLS enforcing data isolation between workspaces. Nuxt 4, TypeScript strict mode, Supabase (PostgreSQL, Auth, Storage). Custom instance deployed for a private client with ongoing development.
1
746
React(1)
Matias Fourcade's avatar
Matias Fourcade
pro
Spain
Full Stack Web Engineer & UI/UX Designer
1x
Hired
6
Followers
Full Stack Web Engineer & UI/UX Designer
Cover image for Trellia full stack engineering
Trellia full stack engineering
0
9
Cover image for Frontend engineering Upword AI
Frontend engineering Upword AI
0
7
Cover image for Webflow Ecommerce
Webflow Ecommerce
1
0
16
Cover image for Web design and webflow development
Web design and webflow development
0
13
React(2)
Juan Riccardini's avatar
Juan Riccardini
pro
Spain
Senior Designer | UX/UI, Branding & Web Design
5.0
Rating
3
Followers
Senior Designer | UX/UI, Branding & Web Design
Cover image for Learning Website UX/UI Design
Learning Website UX/UI Design
0
3
Cover image for Zanfi Shoes: Branding, Website & Art Direction
Zanfi Shoes: Branding, Website & Art Direction
0
0
Cover image for Visual identity & Web Design for architecture studio.
Visual identity & Web Design for architecture studio.
0
2
Cover image for Lois Jeans - AW23 Campaign | UX/UI
Lois Jeans - AW23 Campaign | UX/UI
0
2
React(1)
Pedro Molina's avatar
Pedro Molina
Madrid, Spain
Fullstack Engineer: AI-Driven Solutions
11
Followers
Fullstack Engineer: AI-Driven Solutions
Cover image for Tequeño Studios | Agencia Digital Creativa
Tequeño Studios | Agencia Digital Creativa
0
1
Cover image for Size Wizard - Shopify App
Size Wizard - Shopify App
0
0
Cover image for Pekebyte.com
Pekebyte.com
0
2
Cover image for Dietmind: AI Meal prep planner
Dietmind: AI Meal prep planner
0
2
React(2)
Matthew Ortega's avatar
Matthew Ortega
Spain
UX/UI design & code, design systems, design tokens
FRAMER_EXPERT

expert

UX/UI design & code, design systems, design tokens
Cover image for Equi
Equi
0
53
Cover image for Form & Void
Form & Void
0
23
Cover image for Verizon Media Immersive
Verizon Media Immersive
0
13
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React(3)
Alex Mamaev's avatar
Alex Mamaev
Madrid, Spain
AI & SaaS Developer with Product Expertise
AI & SaaS Developer with Product Expertise
Cover image for Developing an AI-Powered Tool for Gathering Customer Feedback
Developing an AI-Powered Tool for Gathering Customer Feedback
0
12
Cover image for Chrome Extension for Scheduling Meetings Globally
Chrome Extension for Scheduling Meetings Globally
0
11
Cover image for Developing a Chatbot and Widget for Property Managers
Developing a Chatbot and Widget for Property Managers
0
8
Placeholder project card media
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React(2)