Freelancers using PostgreSQL in Madrid

Freelancers using PostgreSQL in MadridFreelancers using PostgreSQL in Madrid

Projects People

Matias Fourcade

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

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16

Cover image for Webflow Ecommerce

Webflow Ecommerce

1

0

21

Cover image for Web design and webflow development

Web design and webflow development

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19

Cover image for Ravenscroft UI/UX designer and webflow development

Ravenscroft UI/UX designer and webflow development

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17

Sebastiaan Wiechers

Data Engineering & Fullstack Expert 🚀

Data Engineering & Fullstack Expert 🚀

Cover image for Development of an AI-powered product configurator

Development of an AI-powered product configurator

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10

Cover image for Retrieval Augmented Generation (RAG) LLM Chatbot

Retrieval Augmented Generation (RAG) LLM Chatbot

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20

Cover image for Development of a custom ETL solution

Development of a custom ETL solution

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8

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agencra.xyz - Automated Pipelines. Ship in days, not weeks.

$5k+: Earned

27x: Hired

5.0: Rating

7: Followers

Expert

agencra.xyz - Automated Pipelines. Ship in days, not weeks.

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.

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108

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

113

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

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4

Cover image for Alephyr — Trading Engine with Evolutionary Optimization

Alephyr — Trading Engine with Evolutionary Optimization

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10

Developer

$1k+: Earned

1x: Hired

5.0: Rating

2: Followers

Developer

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42

Cover image for administration page of Amatis Agency

administration page of Amatis Agency

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45

Cover image for Innovative Landing Page Design for Amatis Company Unveiled

another landing of Amatis Company

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68

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37

José Ángel Olivares

Product Engineer | AI, Data Automation & Secure Platforms

New to Contra

Product Engineer | AI, Data Automation & Secure Platforms

Cover image for Traceable Data Pipeline | Evidence & Alerts

Traceable Data Pipeline | Evidence & Alerts

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1

Cover image for GMI | Market Intelligence & Decision Support

GMI | Market Intelligence & Decision Support

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0

Cover image for Global SID | Distributed Integrity Verification

Global SID | Distributed Integrity Verification

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1

Cover image for Observatorio Cívico | Traceable Public Data Platform

Observatorio Cívico | Traceable Public Data Platform

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1

IT Consultant

IT Consultant

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5

Cover image for Ferrecasado

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3

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4

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Adrián González

Fullstack Developer: Consulting & Coding Expert

Fullstack Developer: Consulting & Coding Expert

Cover image for Ecommerce app

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1

Cover image for mini plaform using next and supabase

mini plaform using next and supabase

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1

Cover image for Questions and Answares platform

Questions and Answares platform

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1

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