Freelancers using React in Community of MadridFreelancers using React in Community of 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
740
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
715
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
722
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
743
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)
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
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Adrian Rubio's avatar
Adrian Rubio
Madrid, Spain
WordPress & Elementor Expert ✦ Digital Marketing Strategist
WordPress & Elementor Expert ✦ Digital Marketing Strategist
Cover image for Physis Digital - Website Development
Physis Digital - Website Development
0
2
Cover image for Handarholf.com – A Digital Canvas for an Artist’s Identity
Handarholf.com – A Digital Canvas for an Artist’s Identity
0
3
Cover image for Modern Website for a Luxury Barbershop in Madrid
Modern Website for a Luxury Barbershop in Madrid
0
3
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Gustavo Jimenez's avatar
Gustavo Jimenez
Madrid, Spain
Web Dev & PM: User Experience Guru
Web Dev & PM: User Experience Guru
Cover image for viajeselcorteingles.es
viajeselcorteingles.es
0
2
Cover image for Fusio-Dose
Fusio-Dose
0
6
Cover image for LotesOnline.es
LotesOnline.es
0
1
Cover image for Kerastase&Boots
Kerastase&Boots
0
3
React(4)