Ezequiel Carrizo

About

Hi, I'm Ezequiel.

I'm a lead software engineer at The Knot Worldwide, living in Tenerife, Spain. I'm originally from Argentina and have worked in software since 2007: first in QA, now leading distributed teams.

Outside work I build products of my own: Fabiana, WardenAuth and Interview Sparring. I design them, write the code and run them in production.

Email meFull CV on LinkedIn

Work

  1. Sep 2022 – now

    Lead Software Engineer, The Knot Worldwide

    • Re-architected the core catalog platform: API latency down 96.5%, payloads down 98.9%, error rate from 3.4% to 0.1% on the same infrastructure.
    • Turned a multi-hour manual product onboarding workflow into an automated, near-instant self-service pipeline.
    • Introduced spec-driven development and agentic workflow standards across teams, with productivity up 17% on average.
    • Second place in an internal hackathon with an OpenAI-based tool for accessibility: alt text, descriptions and transcriptions.
  2. Mar 2021 – Aug 2022

    Lead Software Engineer, The Drum

    • Moved a PHP 5.4 monolith to PHP 8.1, serverless functions and microservices, cutting the AWS bill by 65%.
    • Re-architected ad delivery and analytics pipelines, raising ad operations productivity by 30%.
  3. Jun 2016 – Feb 2021

    Senior Software Engineer, Owl Health

    • Designed the HIPAA-compliant platform behind the startup, with US EHR integration through Redox.
    • Split Symfony monoliths into Node.js services on AWS and moved authentication to Cognito.
  4. 2007 – 2016

    QA, then Software Engineer, Ikarus, Devel and Excedesoft, Córdoba

    • Integrations for enterprise clients including Movistar, Shell and Telecom Argentina.

What I work with

TypeScript, Node.js, NestJS, Go, PHP and Python. AWS (Lambda, DynamoDB, SQS, Step Functions, Bedrock), SST, Terraform and GitHub Actions. PostgreSQL, Redis, MongoDB. LLM APIs from OpenAI and Anthropic, and agentic workflows.

Education: Associate Software Engineer, Universidad Nacional de Córdoba. Certificates from Google (project management, people management, AI) and AWS (Developer).

  1. 2022–nowLead Software Engineer, The Knot Worldwide
  2. 2021–2022Lead Software Engineer, The Drum
  3. 2016–2021Senior Software Engineer, Owl Health
  4. 2007–2016QA to Software Engineer, Córdoba, Argentina

I also write about building products, architecture and leading teams.