Senior software engineer. Twelve years building backend, blockchain and B2B platforms across four countries.

How I can help

About

I'm Yosbel. A software engineer since 2013. I studied Computer Science Engineering in Havana, worked on platforms for sales and access to financial markets in Buenos Aires, spent time at a product agency in London, and since 2021 I've been in Spain — first in the Basque Country, where I also earned a Master's in Blockchain Technology at UPV/EHU, and now in Murcia.

My sweet spot: backend that holds up in production, blockchain integration (smart contracts, crypto gateways) and embedding AI into real products. I'm fluent in Spanish and English.

Selected work

• CodeContract

  codecontract.io

  Contract-management platform with Ethereum smart contracts, document OCR, digital signing and a workflow engine. Since 2021 as Senior Full-Stack: microservices backend, Vue and React frontends, serverless infrastructure on AWS.

  Node.js · Vue · React · Solidity · AWS Lambda · CDK · Terraform · OCR

• PagoLinea

  pagolinea.com

  Bitcoin payment processor with several entry points: a web dashboard for merchants, an embeddable iframe, a mobile app and a BTC swap module. Full-stack work from backend to native integrations with the network.

  PHP / Symfony · Vue · BTC integrations · Webhooks · iframe SDK

• PepTalk

  peptalk.com

  Multi-tenant corporate-communication platform. A semantic data layer with JWT and multi-tenant query-rewrite, React/Vue frontends, discovery and check-in modules.

  Node.js · React · Vue · multi-tenant Cube · JWT

• CobbleWeb

  cobbleweb.co.uk

  Full-Stack at a product agency in London (2019-2020). E-commerce, marketplaces, web and mobile apps for B2C and B2B clients.

  PHP / Symfony · Vue · Mobile · CMS

Own products

• Hobra

  hobra.es

  An AI app for renovation companies that I designed and built end-to-end. Each job organized by phases, photos auto-classified, quotes generated from voice, a real-time panel for the end client. Flutter + AI APIs. Currently in beta with renovation companies in Spain.

  Flutter · Node.js · OpenAI · WhatsApp Cloud API · Supabase

  

  

  

• ralvi

  ralvi.es

  A compliance platform for fruit & vegetable packhouses that export. It reads your paperwork with AI and keeps a single source of truth ready for every audit at once —IFS, BRCGS, Tesco, Mercadona, GRASP—, flags drift before the auditor does, and generates each standard's dossier with one click. Currently piloting in Murcia.

  AI · OCR · cross-standard mapping · piloting with packhouses in Murcia

  

Experience

My path as a software engineer, in reverse order:

• 2021 — now CodeContract · remote, ES
  Senior Full-Stack. Smart contracts, automation of administrative processes, serverless infrastructure. Node.js · Vue · React · Solidity · AWS · CDK · Terraform
• 2019 — 2020 CobbleWeb · London, UK
  Full-Stack at a product agency. E-commerce, marketplaces, web and mobile.
• 2018 — 2019 StoneX Group · Buenos Aires, AR
  Full-Stack. Institutional access to 36 derivatives exchanges and 175 FX markets; the full lifecycle from trade to settlement.
• 2016 — 2018 Marketing One · Buenos Aires, AR
  Systems for phone-based insurance sales and SOAP / REST integrations.
• 2013 — 2016 DATEC · Havana, CU
  Web development, software analysis and database design. First job out of university.

Education: Master's in Blockchain Technology at UPV/EHU (2020-2021) and a degree in Computer Science Engineering from Universidad de las Ciencias Informáticas, Havana (2008-2013).

Get in touch

If you've got something complex that needs serious engineering, send me an email. I'm fluent in Spanish and English.

• emailhola@yosbel.es
• linkedin/in/yosbel
• hobrahobra.es