Freelance Fullstack Engineers in MadridFreelance Fullstack Engineers in Madrid
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Berckan Guerrero's avatar
Berckan Guerrero
maxMadrid, Spain
Senior Full-stack AI Engineer. 14+ years building web stuff.
$10k+
Earned
7x
Hired
5.0
Rating
16
Followers
Senior Full-stack AI Engineer. 14+ years building web stuff.
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
1.3K
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
1.3K
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
1.3K
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
1.3K
Fullstack Engineer(12)
Angel Jaramillo's avatar
Angel Jaramillo
proMadrid, Spain
Full Stack Developer & Framer Expert | Websites That Convert
3x
Hired
5.0
Rating
67
Followers
FRAMER_EXPERT

expert

LOTTIEFILES_X_FIGMA_EXPERT

expert

+2
Full Stack Developer & Framer Expert | Websites That Convert
Cover image for Invisalign Lead Generation Funnel Development
Invisalign Lead Generation Funnel Development
2
6
Cover image for Hero section I designed as
Hero section I designed as a pitch for a potential client in Ottawa, a photo booth service for weddings and events. Black + gold, bold type, and a straight-to-the-point dual CTA. See it live 👉 https://authentic-mercury-215645.framer.app
6
955
Cover image for I designed a fictional landing
I designed a fictional landing page for a SaaS called Forge 🚀 It's an imaginary project management tool for startups. The goal was to practice web design and product storytelling from scratch. All feedback welcome 🙏
4
9
1.6K
Cover image for AGENTME — AI Agent Platform for Jobs & Freelance
AGENTME — AI Agent Platform for Jobs & Freelance
5
20
Fullstack Engineer(1)
Facundo Cappella's avatar
Facundo Cappella
maxMadrid, Spain
Tech Lead | Solution Architect | AI Engineer
126
Followers
Tech Lead | Solution Architect | AI Engineer
Cover image for Rate My Idea
Rate My Idea
1
0
Cover image for Whitepaper Finder
Whitepaper Finder
1
1
Cover image for Landing Page - Tech Company
Landing Page - Tech Company
1
37
Cover image for Landing Page - Ed Tech
Landing Page - Ed Tech Company
1
50
Fullstack Engineer(2)
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
2
Cover image for Auratify
Auratify
0
1
Cover image for Pekebyte.com
Pekebyte.com
0
2
Cover image for Size Wizard - Shopify App
Size Wizard - Shopify App
0
1
Fullstack Engineer(2)
Gonzalo Franco's avatar
Gonzalo Franco
Spain
Software Engineer: Building Awesome Webs Apps & Products
Software Engineer: Building Awesome Webs Apps & Products
Cover image for CTO, OpenBroker.com
CTO, OpenBroker.com
0
13
Cover image for Full-stack developer – OB Studio
Full-stack developer – OB Studio
0
8
Cover image for Lead Engineer, eth-roulette.com
Lead Engineer, eth-roulette.com
0
7
Cover image for CTO, Subletny.com
CTO, Subletny.com
0
13
Fullstack Engineer(2)