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jbelbo/README.md

Hi, I'm Matías Spinarolli

I'm a Senior Software Engineer with 10+ years of experience designing and building scalable systems across DevOps, e-commerce, health tech, and public safety. I enjoy owning problems end-to-end — from architecture and backend services to clean, performant frontends. I'm passionate about writing maintainable code, applying best practices, and contributing to meaningful products.

  • Based in Rosario, Argentina
  • Backend-heavy, but comfortable across the full stack
  • Currently working independently as a Software Engineer and open to new opportunities
  • Reach me at spinarolli.matias@gmail.com
  • GitHub

Skills & Technologies

Languages: Go, TypeScript, PHP, Ruby
Frameworks: React, Symfony, Laravel
Databases: MySQL, MongoDB, ElasticSearch
Dev Tools: Docker, Kafka, Git, AWS
Other: REST APIs, OpenAPI, Microservices, Distributed Systems, CI/CD, API Design


Work Experience

Independent Software Engineer

Mar 2025 – Present

  • Providing independent consulting and technical contributions in backend and full-stack development
  • Exploring opportunities in backend systems (Go, PHP, React) and cloud infrastructure
  • Supporting open-source and personal projects to sharpen system design and API development skills

Bowery (Client: Saltbox – Parsel product)Software Engineer

Oct 2024 – Mar 2025

  • Contributed to the development of Parsel, a logistics and warehouse management platform
  • Built and maintained backend services in Go, ensuring scalability and reliability
  • Collaborated with cross-functional teams to deliver features that improved operational efficiency
  • Enhanced system performance through clean code, testing, and automation practices

Portainer.ioSenior Software Engineer

May 2022 – Aug 2024

  • Built an async command execution system for Edge Agents
  • Fixed concurrency issues and optimized backend memory usage
  • Migrated AngularJS frontend components to React
  • Enhanced API performance with batch operations and caching

Hip eCommerceSenior Software Engineer

Jul 2021 – May 2022

  • Created a comic book cover recognition feature using OCR, barcode scanning, and image comparison
  • Delivered pricing services and user-facing features across platforms (HipComic, HipStamp, HipPostcard)
  • Improved performance and UX through smart caching and image optimization

Ring (Amazon)Senior Software Engineer

Aug 2020 – Jul 2021
Neighbors for Public Safety team

  • Built a microsite for public safety agencies
  • Migrated parts of a Ruby monolith into Go-based microservices
  • Integrated 2FA and improved site reliability and security

EndavaSenior Software Engineer

Sep 2019 – Aug 2020
Client: Internet Brands (Martindale, Lawyers.com)

  • Built internal SDKs and microservices
  • Synced data across databases using Kafka
  • Improved developer workflows through containerization and test automation

KodearSenior Software Engineer

Oct 2017 – Aug 2019
Project: ekommerce.com.ar

  • Designed REST & GraphQL APIs
  • Integrated payments and shipping providers
  • Led code reviews and quality assurance efforts

DonwebSenior Software Engineer

Mar 2016 – Sep 2017
Project: envialosimple.com

  • Built scalable email reporting APIs
  • Maintained a system sending over 100M emails/month
  • Created tools for monitoring IP reputation and deliverability

PAHO/WHOSoftware Engineer

Jan 2015 – Feb 2016

  • Developed a health research repository deployed on bare-metal infrastructure

Ministry of Health (Argentina)Full-stack Developer

Feb 2013 – Jan 2015

  • Built and maintained a Blood Bank management system
  • Delivered forensic serology modules and improved code quality

Education

FCEIA – Universidad Nacional de Rosario
Bachelor of Science in Computer Science
2005 – 2009

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