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Xavier RomeroXR

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About Xavier

Cloud, infrastructure and Python backend engineer with more than 15 years of experience in critical production environments, both in on-premise datacenters and cloud platforms (AWS and GCP).

I spent more than a decade as the person ultimately responsible for the full infrastructure of a service provider, and later worked in fully cloud-based companies as a cloud architect, sole infrastructure owner and Python backend engineer.

Over the last years I have been working mainly in the blockchain sector, designing and operating cloud infrastructure for distributed systems and Zero Knowledge networks, as well as performing DevOps, testing, QA and performance-oriented tasks.

I specialize in building stable, scalable and well-monitored infrastructures, automating deployments and developing robust Python backends for production systems where reliability, performance and security are critical.

I am available for remote projects, both hourly and medium-term collaborations.
  • Catalan

    Native or bilingual

  • English

    Conversational

  • Spanish

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Polygon Labs
    DevOps Engineer
    TECH
    March 2022 - November 2025 (3 years and 8 months)
    Barcelona, Spain
    Design and operation of cloud infrastructure for a new Zero Knowledge–based blockchain network. Deployment and maintenance of nodes, environment automation, monitoring and reliability of distributed systems.

    Later, work within a technical team focused on testing, QA, performance and validation of blockchain platforms in production.
    QA testing Google cloud Blockchain Ethereum IT Architecture
  • Lead Ratings
    Senior Lead System Engineer
    TECH
    August 2019 - March 2022 (2 years and 7 months)
    Barcelona, Spain
    Sole responsible for the company’s cloud infrastructure on AWS. Full automation of systems, monitoring and production support. Backend development and automation in Python for over three years for data analysis and marketing platforms.
    AWS Python Machine learning Jupyter API REST
  • Basetis
    Cloud Specialist
    TECH
    April 2019 - July 2019 (3 months)
    Barcelona, Spain
    Implementation of container-based environments using Docker, deployment automation and modernization of existing infrastructures towards more flexible and scalable architectures
    Docker AWS

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Education

  • Amazon AWS Technical Professional Amazon AWS Business Professional VMware Certified Professional 5 - Data Center Virtualization (VCP5- DCV) ISACA CISM - Certified Information Security Manager ITIL Foundation v3
    Amazon AWS Technical Professional Amazon AWS Business Professional VMware Certified Professional 5 - Data Center Virtualization (VCP5- DCV) ISACA CISM - Certified Information Security Manager ITIL Foundation v3
  • Computers engineer
    Universitat Politècnica de Catalunya
    2002
    Computers engineer

Skill set

Categories