Open to new opportunities

Hi, I'm Judit Ortiz

▍

I build high-performance systems where Web3, product and engineering meet. From smart contracts and hardware wallets to full platforms shipped end-to-end.

View projectsGet in touch

Need a website, an app or an automation for your business? See JEY DEV APPS services →

typescriptUTF-8 · LF
Years in tech
5+
Years in tech
Years in Web3
3+
Years in Web3
Teams & companies
10+
Teams & companies
Startup co-founded
1
Startup co-founded
// About me
Engineer by training, builder by nature.
I'm Judit, a blockchain engineer and software developer based in Barcelona. I started in telecommunications and robotics engineering, went deep into embedded systems, and then found my place in Web3, where I've spent the last years building smart contracts, hardware wallet apps, and distributed backends in Rust, Solidity and TypeScript.
In 2025 I co-founded Zapic, a social media automation startup, building the product end-to-end from concept to launch. I've led its growth as COO while staying hands-on with code, because shipping is what I enjoy most. Now I'm looking for my next challenge.
I care about systems that are fast, secure and actually used: audited contracts with zero reported vulnerabilities, multi-signature support on Ledger devices, and platforms delivered ahead of schedule.
Beyond the code
  • Semi-pro basketball
    Years of competitive play. Team-first mentality, on and off the court.
  • 10+ years of piano
    Classical training in piano and music theory. Discipline meets creativity.
  • 3 languages
    Spanish & Catalan (native), English (proficient).
// Experience
Where I've built things.
Co-Founder & COO · Zapic
Apr 2025 - Present · Barcelona, Spain
ProductGrowthAutomationSocial Media APIs
Senior Blockchain Developer · xFractal
Feb 2025 - Dec 2025 · Madrid, Spain · Hybrid
RustTypeScriptNode.jsSQLMongoDB
Senior Blockchain Engineer · Wise Security
Nov 2024 - Feb 2025 · Zaragoza, Spain · Hybrid
ReactTypeScriptSolidityRustWeb3.js
Project Manager · MiMIAT Health
Jun 2024 - Oct 2024 · Barcelona, Spain
ReactNode.jsAWSMongoDBDocker
Blockchain Engineer · Zondax
Jan 2024 - Jun 2024 · Remote · Switzerland
TypeScriptLedger SDKReactNode.jsWeb3.js
Blockchain Developer · Colección NFT
Mar 2023 - Jan 2024 · Barcelona, Spain
SolidityHardhatReactEthereumIPFS
Before Web3: electronics & embedded
ModpoW Engineering
Electronics Engineer · C, ESP32/STM32, FreeRTOS
2022 - 2023
Institut Català de la Salut
Web Developer · PHP, MySQL, JavaScript
2022
Server Reguladores
Junior Electronics Engineer · VB.NET, Circuit Design
2021 - 2022
FICOSA
Junior Systems Engineer · MATLAB, Simulink, Altium
2021
// Projects
Things I've shipped.
A selection of products and systems I've built or led. From a startup shipped from zero to audited smart contracts in production.
Co-Founder · Full product
Zapic
AI-powered social media automation platform. Built end-to-end with my co-founder: from concept, architecture and product to launch. Now leading growth and operations as COO.
ProductAutomationSocial APIsGrowth
Visit site 
Génesis #042
Current bid
⏱ 0:10
1.0 ETH
0x7f…3a21.2 ETH
0x2c…91d1.5 ETH
0xa4…c081.8 ETH
0x9b…f442.4 ETH
Smart contract escrow · audited
Blockchain Developer
NFT Auction House
Complete NFT bidding system for an art gallery on Ethereum. Smart contracts written, tested and audited. Zero vulnerabilities reported at launch and 85% positive user feedback.
SolidityHardhatIPFSReact
Review tx▍
○ Signer A
○ Signer B
○ Signer C
multi-sig wallet · 0/3 signatures
Blockchain Engineer
Ledger Multi-Sig Apps
Hardware-wallet applications for blockchain networks on Ledger devices. Led the feature that added multi-signature transaction support, expanding functionality and security.
TypeScriptLedger SDKWeb3.js
On-chain ticket
NIGHT FEST
GATE B · ROW 12 · SEAT 34
token #0817 · ERC-721
…
waiting scan
1,243 sold
Lead Frontend
Event Ticketing dApp
Web platform with two portals (administration and user) for managing and purchasing event tickets, backed by blockchain-based security.
ReactSolidityWeb3.jsNode.js
🩺
Patient record
ID ****-2481 · vitals, labs
→
Awaiting
·
#4021
→
#4022
→
#4023
→
#4024
patient data never leaves the hospital unencrypted
Project Manager
Health Data Platform
Health management platform with blockchain-secured patient data. Delivered three weeks ahead of schedule while improving customer service response times.
ReactNode.jsAWSDocker
// Skills
My toolbox.
RustSolidityTypeScriptReactNext.jsNode.jsPythonGoEVMSolanaHardhatFoundryWeb3.jsEthers.jsIPFSDockerAWSMongoDBRustSolidityTypeScriptReactNext.jsNode.jsPythonGoEVMSolanaHardhatFoundryWeb3.jsEthers.jsIPFSDockerAWSMongoDB
Blockchain
SolidityRustEVMSolanaHardhatFoundryWeb3.jsEthers.jsIPFSTruffleRemixMetaMask
Languages
TypeScriptJavaScriptPythonCC++GoSQL
Frontend
ReactNext.jsHTMLCSSTailwind
Backend & Infra
Node.jsExpress.jsDockerAWSMongoDB
Courses & certifications
  • Solidity and Rust BootcampMetana · 2024
  • Blockcoder BootcampThemar Academy · 2023
  • Blockchain Development: Tools & TechnologiesTokio School · 2023
  • Python Programming CourseUNIR · 2023
Education
  • Master in Industry 4.0
    Universidad de La Rioja · 2022 - 2023
  • Electronic Telecommunications Engineering & Robotics
    La Salle University, URL · 2018 - 2022
// Contact
Let's build something together.
Whether it's a Web3 product, a smart contract audit, or a crazy idea that needs shipping, my inbox is open.
Say hello →
jeydevapps@gmail.com
Find me on
 GitHub LinkedIn
★ Worked with me? Leave a review on Google
Looking for custom web, app or automation development in Barcelona? Services and pricing →