Freelance Backend Engineers in MadridFreelance Backend Engineers in Madrid
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Berckan Guerrero's avatar
Berckan Guerrero
pro
Madrid, Spain
14+ years building fast, accessible websites. AI Friendly.
1x
Hired
5.0
Rating
6
Followers
14+ years building fast, accessible websites. AI Friendly.
Cover image for LOVEDIS: B2B innovation platform for
LOVEDIS: B2B innovation platform for a German ecosystem connecting startups and corporate partners. Built with Nuxt 4, Vue 3, and TypeScript on a headless CMS architecture. Delivered during my time at Yumeda Studio, this website was developed creating 110+ reusable CMS components and 200+ Vue components total, a custom responsive image system with modern format support and art direction per breakpoint, centralized SEO management, Content Security Policy with enterprise security headers, and a design system with 70+ tokens enforced across the entire codebase. GDPR-compliant EU deployment.
3
3
379
Cover image for RAVEN: AI-powered knowledge management app
RAVEN: AI-powered knowledge management app with notes, tasks, and a built-in AI chat. Built with Nuxt 4, Vue 3, TypeScript, Supabase (PostgreSQL, Auth, RLS), and Gemini AI. 34 components, 25 composables, 13 database tables, 12 AI functions including streaming chat, voice input, and automatic conversation titles. Full i18n (EN/ES), offline support with sync queue, real-time CRUD, folder organization, and workspace-based content separation. Built for a private client, actively developed.
2
260
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. Built with Next.js 16, TypeScript, and Tailwind 4 on Vercel. Designed for developers who want actionable performance fixes instead of generic audit reports. Currently in development as part of a Vercel AI Accelerator application. Personal project.
2
330
Cover image for PartSpace: B2B SaaS marketing website
PartSpace: B2B SaaS marketing website for the manufacturing sector, built with Nuxt 4 and Storyblok. Developed 100+ reusable CMS components, integrated real-time commodity pricing via FRED API, implemented strict Content Security Policy (CSP) with enterprise-grade security headers, and delivered full English/German localization with 8 dynamic sitemap variants. Delivered during my time at Yumeda Studio.
2
444
Backend Engineer(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
8
Cover image for Webflow Ecommerce
Webflow Ecommerce
1
0
14
Cover image for Web design and webflow development
Web design and webflow development
0
13
Cover image for Ravenscroft UI/UX designer and webflow development
Ravenscroft UI/UX designer and webflow development
0
9
Backend Engineer(1)
Gustavo Jimenez's avatar
Gustavo Jimenez
Madrid, Spain
Web Dev & PM: User Experience Guru
Web Dev & PM: User Experience Guru
Cover image for LotesOnline.es
LotesOnline.es
0
1
Cover image for viajeselcorteingles.es
viajeselcorteingles.es
0
2
Cover image for Fusio-Dose
Fusio-Dose
0
5
Cover image for Kerastase&Boots
Kerastase&Boots
0
3
Backend Engineer(1)
Fran Perea's avatar
Fran Perea
Spain
Fullstack Engineer with Crypto Expertise
Fullstack Engineer with Crypto Expertise
Cover image for Creating a Cryptocurrency Trading Platform
Creating a Cryptocurrency Trading Platform
0
2
Cover image for ADNTRO
ADNTRO
0
27
Cover image for Revamping User Interface for a Healthcare Company
Revamping User Interface for a Healthcare Company
0
16
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Backend Engineer(3)
Pedro Vale Ramos's avatar
Pedro Vale Ramos
Leganés, Spain
Mobile and web engineer working with React-Native and native
Mobile and web engineer working with React-Native and native
Cover image for Popcomp - Android app to challenge sport mates
Popcomp - Android app to challenge sport mates
0
5
Cover image for Turisgalicia - Travel Guide App
Turisgalicia - Travel Guide App
0
4
Cover image for Opositatest - Test platform to study for opposition exams
Opositatest - Test platform to study for opposition exams
0
2
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Backend Engineer(1)