Freelancers using React Native in SpainFreelancers using React Native in Spain
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Tomi Scattini's avatar
Tomi Scattini
Granada, Spain
Full Stack Developer
$5k+
Earned
4x
Hired
5.0
Rating
99
Followers
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Full Stack Developer
Cover image for EmpowerLine Malawi
EmpowerLine Malawi
1
2
101
Cover image for Development of Lydiob7 Digital Academy Platform
Development of Lydiob7 Digital Academy Platform
1
0
2
Cover image for Sabrina Polanco | Design Studio
Sabrina Polanco | Design Studio
4
190
Cover image for BeatSur Books
BeatSur Books
4
80
React Native(1)
Alex Shchetynin's avatar
Alex Shchetynin
proBarcelona, Spain
Full-Stack Web&Mobile Development | UI/UX Design
11
Followers
Full-Stack Web&Mobile Development | UI/UX Design
Cover image for FYNTS Mobile Marketplace App
FYNTS Mobile Marketplace App
1
19
Cover image for Travelot - traveling mobile app
Travelot - traveling mobile app
1
10
Cover image for AURLIX - a next-generation crypto trading platform.
AURLIX - a next-generation crypto trading platform.
0
26
Cover image for BLOXMOVE The Decentralized System connecting power & mobility
BLOXMOVE The Decentralized System connecting power & mobility
0
16
React Native(2)
Nikita Beznosikov's avatar
Nikita Beznosikov
Madrid, Spain
Full-Stack Engineer · SaaS · Node.js / React / TypeScript
5.0
Rating
3
Followers
Full-Stack Engineer · SaaS · Node.js / React / TypeScript
Cover image for AI-powered language flashcard app for
AI-powered language flashcard app for iOS. Users describe any theme ("Coffee and tea", "Driving exam") and the app instantly generates a custom deck via Google Gemini. Features a progressive 3-level vocabulary system (beginner → intermediate → advanced) with mastery-based unlocking, SM-2/FSRS spaced repetition with Again/Hard/Good/Easy ratings, offline-first SQLite storage, bilingual audio examples, smart daily reminders, and a freemium model (RevenueCat) gating unlimited decks and advanced levels. Built with React Native (Expo), TypeScript, SQLite, Supabase, Google Gemini, RevenueCat.
0
99
Cover image for Pay-per-use video testimonial SaaS. Businesses
Pay-per-use video testimonial SaaS. Businesses collect text reviews for free and pay per video testimonial via a credit system — no subscriptions. Features include browser-based video recording, embeddable widget with masonry layout, Stripe payments, credit metering via Cloudflare Stream analytics, signed video URLs for hotlink protection, and a dashboard for approving/rejecting submissions. Built with Next.js, Supabase (PostgreSQL), Cloudflare Stream, Stripe.
1
122
Cover image for Shopify app for EU Digital
Shopify app for EU Digital Product Passport (DPP) compliance. Merchants can create and manage product passports with QR codes, print labels, bulk edit via CSV, and use AI to auto-fill passport fields from existing product data. Built with Remix, React, Node.js, Prisma, and Shopify GraphQL API.
1
128
Cover image for Built and owned the entire
Built and owned the entire technical stack for a US e-commerce platform generating $1M/mo revenue. Developed custom Next.js storefront, checkout, and CMS admin panel from scratch. Integrated Stripe, Braintree, PayPal, Apple Pay, and Google Pay. Implemented fraud protection, automated chargeback handling via Visa CDRN, server-side tracking (FB CAPI, Google Ads), and BigQuery analytics pipeline.
1
107
React Native(1)
Alberto Guinda's avatar
Alberto Guinda
Zaragoza, Spain
AI Agent & Full-Stack Engineer · LangGraph · RAG · AI Apps
New to Contra
AI Agent & Full-Stack Engineer · LangGraph · RAG · AI Apps
Cover image for A health-tracking Android app for
A health-tracking Android app for logging blood pressure, oxygen, pulse, glucose and weight — designed for elderly users first. Oversized one-digit-at-a-time keypad, high-contrast readings, and a one-tap printable report their doctor can actually read. Medication list that keeps withdrawn drugs visible in red instead of hiding them, so nobody takes one by mistake. Offline-first: the database lives on the device and never leaves it unless the user syncs it to their own LAN server. Built with Expo/React Native in strict TypeScript across 15 languages, with speech input, a marketing site in Astro on Cloudflare Pages behind a hash-pinned CSP, and a Hono + SQLite sync server with last-write-wins reconciliation.
1
347
Cover image for 🚀 A multi-tenant booking SaaS
🚀 A multi-tenant booking SaaS shown end-to-end From the product site that sells it, to the white-label site each business gets, straight to the dashboard that runs it all. 🤖 How it works: Customers book by chatting with an AI assistant in a messaging app. Every booking carries the channel it arrived through, turning chat conversations into a highly visible, organized agenda for the business owner. 📊 The Admin Panel: Live Analytics: Complete with an occupancy heatmap. Full Agenda Management: Create, reschedule, confirm, complete, or mark as no-show. Smart Operations: An auto-built customer CRM (generated directly from bookings), catalogue & staff management, and bot-collected reviews. Real-World Flexibility: The owner can force an appointment on top of another. Barbershops squeeze people in every day, and software that forbids it simply gets abandoned. 🛠 The Tech Stack: Frontend: Vite + React 19 + HeroUI v3 Backend: FastAPI (Python 3.14) on PostgreSQL Static Sites: Astro hosted on Cloudflare Monetization: Stripe subscriptions with a 30-day trial Data Integrity: No double-booking is guaranteed by a robust database exclusion constraint, rather than just relying on the interface. 🌍 Status: Live in production and successfully taking real appointments for a barbershop in Zaragoza.
2
242
Cover image for Recruiters sit on hundreds of
Recruiters sit on hundreds of CVs they can't search. Keyword search misses the obvious — the candidate wrote "React", you searched "frontend", they never surface — and every AI tool that fixes that ships candidate data to a third-party API. I built RecruitSecure AI to do the semantic search without the API call. The embedding model runs server-side through Transformers.js (quantized multilingual-e5-small, 384 dimensions, 100+ languages), so you can ask in Spanish and it finds CVs written in English — and nothing ever leaves the deployment. Drop in PDFs or DOCX and it extracts name, email, skills and experience, indexes each CV as a vector, and answers plain-language queries like "frontend lead who has built a design system": ranked by relevance, each result showing the exact CV fragments behind the match, so the recruiter sees the reason and not just a score. Retrieval is hybrid — pgvector HNSW cosine fused with BM25 full-text through Reciprocal Rank Fusion, then re-ranked from the recruiter's own thumbs up/down. Next.js 16, React 19, strict TypeScript, PostgreSQL + pgvector through Drizzle ORM, Auth.js, Stripe subscriptions, multi-tenant with AES-256-GCM encryption at rest and GDPR export and deletion. Built solo, end to end. The video is the real application: ten synthetic CVs uploaded through the actual pipeline, extracted, embedded and searched. Nothing staged.
3
372
Cover image for A conversational AI copilot that
A conversational AI copilot that takes a buyer from "I want to reserve" to contract and receipt. A LangGraph agent orchestrates 19 tools with human-in-the-loop confirmation before any payment, session memory, and RAG — over a transactional backend with hard guarantees (no double-booking, Stripe + webhook reconciliation, full audit) and a 3D/BIM viewer with a first-person walkthrough. Stack: TypeScript, LangGraph.js, Hono, PostgreSQL/Drizzle, React 19, react-three-fiber. LangSmith observability with GDPR PII redaction.
1
372
React Native(1)
Esteban Simón's avatar
Esteban Simón
Madrid, Spain
CTO & CPO | Technical Leadership, Digital Product
CTO & CPO | Technical Leadership, Digital Product
Cover image for CTO & CPO - marketplace app
CTO & CPO - marketplace app
0
18
Cover image for CTO & CPO consulting for B2C E-commerce Startup app
CTO & CPO consulting for B2C E-commerce Startup app
0
27
Cover image for CTO & CPO - B2B SaaS web app
CTO & CPO - B2B SaaS web app
0
21
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