Freelancers using Next.js in SpainFreelancers using Next.js in Spain
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Marcel Stredak's avatar
Marcel Stredak
pro03730 Xàbia, Spain
Senior Full-Stack Architect & Strategic Product Lead
$10k+
Earned
2x
Hired
5.0
Rating
18
Followers
Senior Full-Stack Architect & Strategic Product Lead
Cover image for Domior: A Config-Driven Question Flow for Property Site
Domior: A Config-Driven Question Flow for Property Site
1
3
Cover image for Interactive Architectural Portfolio and System Simulator
Interactive Architectural Portfolio and System Simulator
1
19
Cover image for AI SaaS Platform with Multi-User Accounts and Payments
AI SaaS Platform with Multi-User Accounts and Payments
0
8
Cover image for AI Quoting Platform with Speech-to-Text & PDF Export
AI Quoting Platform with Speech-to-Text & PDF Export
0
7
Next.js(4)
Luke Jovanovic's avatar
Luke Jovanovic
Madrid, Spain
agencra.xyz - Automated Pipelines. Ship in days, not weeks.
$5k+
Earned
27x
Hired
5.0
Rating
6
Followers
REPLIT_EXPERT

Expert

agencra.xyz - Automated Pipelines. Ship in days, not weeks.
Cover image for Concordium — Supply Chain &
Concordium — Supply Chain & Testnet Infrastructure We delivered two blockchain projects for Concordium: a supply chain track-and-trace system and a testnet faucet. Track-and-trace: - Built a CIS-3 NFT smart contract (Rust) for product tracking. - Added sponsored transactions so users don’t need to hold tokens. - Implemented an indexer to track all on-chain movements in real time. - Shipped a full frontend and Docker-based infrastructure. Testnet faucet: - Developed a Next.js faucet with Cloudflare Turnstile bot protection. - Added per-address daily limits and balance checks via the explorer API. - Provided complete documentation for deployment and maintenance. Outcome: - Both systems production-ready and actively used. - 92 combined commits, clean architecture, ready-to-reuse patterns. This case shows our ability to ship end-to-end blockchain solutions—smart contracts, infrastructure, and UX—in one go.
1
56
Cover image for NYC Watch Party Finder — From Idea to Production in 3 Days
NYC Watch Party Finder — From Idea to Production in 3 Days
0
1
Cover image for Yield-Nexus — Real-Time Crypto Portfolio
Yield-Nexus — Real-Time Crypto Portfolio & Trading Platform We built Yield-Nexus as a real-time crypto portfolio and trading dashboard aggregating data across Binance and Bybit. Traders needed a unified view of spot holdings, futures positions, and PnL without switching between exchange consoles.
1
50
Cover image for Alephyr — Trading Engine with Evolutionary Optimization
Alephyr — Trading Engine with Evolutionary Optimization
0
4
Next.js(2)
Fernando Montezuma's avatar
Fernando Montezuma
Madrid, Spain
Senior Product Designer + Front-end for SaaS, Fintech & B2B.
1x
Hired
22
Followers
Senior Product Designer + Front-end for SaaS, Fintech & B2B.
Cover image for Fenix Finance - Branding, Website and Product
Fenix Finance - Branding, Website and Product
0
10
Cover image for Accelera - Branding, UX/UI, Motion / 3D
Accelera - Branding, UX/UI, Motion / 3D
0
11
Cover image for Carbon Terminal - Branding, UX/UI, Motion, 3D and Front-end
Carbon Terminal - Branding, UX/UI, Motion, 3D and Front-end
0
9
Cover image for RiseLabs - Branding, UX/UI, Motion, 3D and Front-end
RiseLabs - Branding, UX/UI, Motion, 3D and Front-end
0
10
Next.js(7)
Arnau López selles's avatar
Arnau López selles
proValencia, Spain
Product Designer & Dev — Figma to shipped SaaS & apps.
New to Contra
Product Designer & Dev — Figma to shipped SaaS & apps.
Cover image for BlockFlow — AI-powered software for
BlockFlow — AI-powered software for UK block managers. BlockFlow is management software I designed and built end-to-end for UK residential block managers. Beyond the core admin (service charges, arrears, contractor invoices), it adds automation the incumbents don't have: it chases contractors for quotes and escalates by SMS after 48h, and an AI voice agent answers out-of-hours emergency calls — deciding whether it's a real emergency, raising the ticket and alerting the on-call contractor automatically. Built solo: Next.js, Supabase (multi-tenant with row-level security), Claude for triage, and a Vapi voice agent. Live in production.
0
10
Cover image for StackD — the website for
StackD — the website for my own dev & automation agency StackD builds the software businesses actually need: custom websites, native apps, SaaS platforms, and turning manual processes into automated flows. I designed and built its website end-to-end. The goal Position StackD as the lean, transparent alternative to traditional agencies — "real products in the hands of real users, not mockups." Fast demos, a fixed 3-person team, no hidden costs. The site had to feel modern, technical and trustworthy in seconds. What I built A fast, responsive marketing site with clear sections: Services, Process (4 steps), Projects, Team and FAQ Terminal-style touches ($ whoami) to give it a developer personality A portfolio section featuring real shipped products (SMASH, NOOK, Volea.io (http://Volea.io), Getflow) Copy and structure optimized to convert visitors into "no-commitment" discovery calls How I built it Next.js + HTML/CSS for a fast, SEO-friendly front end Deployed on Vercel (CI/CD, edge, instant previews) Built AI-assisted with Claude Code — pairing with an AI coding agent to design, iterate and ship faster than a solo dev normally could The takeaway This is how StackD works, proven on itself: idea → live product in days, not months. The agency site isn't a brochure — it's a demo of the exact speed and quality we deliver to clients.
0
47
Cover image for Gateflow — Client Onboarding SaaS
Gateflow — Client Onboarding SaaS for Agencies. Most agencies lose hours before a project even starts. Contracts in email. Briefs half-filled. Assets sent over WhatsApp. Ad account access requested days after kickoff. I built Gateflow to fix that. One link per client. They sign the contract, fill the project brief, upload brand assets, and connect their ad accounts — all from their phone. You track every step in real time from your dashboard and get notified the moment something is completed. No chasing. No follow-ups. No chaos. Built in 48 hours with Next.js, Supabase, Stripe, and Resend. Deployed on Vercel. → usegateflow.io (http://usegateflow.io)
1
120
Cover image for Volea — Booking & Club Management SaaS for Padel Clubs
Volea — Booking & Club Management SaaS for Padel Clubs
0
7
Next.js(3)
Nnamdi Ezenwanne's avatar
Nnamdi Ezenwanne
Málaga, Spain
I build & ship production web apps solo — idea to live
New to Contra
I build & ship production web apps solo — idea to live
Cover image for Gaji — Mobile Social Platform for Nigerian Communities
Gaji — Mobile Social Platform for Nigerian Communities
0
3
Cover image for Afroclip — African Viral Video Platform
Afroclip — African Viral Video Platform
0
3
Cover image for FarmZap: Nigerian Agricultural Marketplace
FarmZap: Nigerian Agricultural Marketplace
0
4
Cover image for Afroclip (afroclip.com (http://afroclip.com)) is a
Afroclip (afroclip.com (http://afroclip.com)) is a video platform for African viral content that I designed and built end to end. It's live with real users. I designed a mobile-first experience inspired by TikTok, Instagram, and YouTube — including a redesigned creator profile page, a clean video card layout, a hero carousel on the homepage, and category-based browsing across entertainment, sports, music, and more. The focus was on a fast, immersive viewing experience with smooth video playback, emoji reactions, a Continue Watching row, and public creator profiles. Throughout, I prioritised making it feel polished and effortless to navigate on a phone.
1
78
Next.js(5)
Berckan Guerrero's avatar
Berckan Guerrero
maxMadrid, Spain
Founders' Tech Partner | Full-Stack AI Engineer | 14 yrs exp
$25k+
Earned
8x
Hired
5.0
Rating
20
Followers
Founders' Tech Partner | Full-Stack AI Engineer | 14 yrs exp
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
1.7K
Cover image for NurvAI: Website Redesign & Development
NurvAI: Website Redesign & Development
1
6
Cover image for Pulso: Prospect Intelligence Dashboard
Pulso: Prospect Intelligence Dashboard
1
6
Cover image for Raven: AI Knowledge Management Platform
Raven: AI Knowledge Management Platform
1
4
Next.js(1)