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

  

  

  

• Compliance posture for agritech

  prototype · in discovery

  A regulatory-compliance dashboard prototype for agricultural farms in Murcia: GLOBALG.A.P., plant-protection products, traceability, audit calendar. Built to pass the audit without losing two weeks to paperwork.

  Discovery + mockup · validating with growers

  

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