José Carlos de Freitas

Summary

Staff Software Engineer specializing in backend platforms and distributed systems, with engineering experience since 2014. I lead architecture and delivery across teams, from content infrastructure and database design to web and mobile products.

At Business Insider, I led a 500,000-article domain migration with zero downtime and built a content API capable of handling more than 1,000 requests per second with p95 latency below 4 ms. My core technologies include Node.js, Go, TypeScript, and MongoDB.

Engineering Experience

• Business Insider

  Jul 2021 - Present

  • Staff Software Engineer 3

    Jan 2025 - Present

    Leading the migration from a legacy Go content delivery API to a Node.js API, coordinating the transition of the website frontend and editorial content management system.

    Designed and built the Node.js content API to handle more than 1,000 requests per second with p95 latency below 4 ms in production.

    Leading development of Business Insider's new mobile app in React Native.

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  • Staff Software Engineer 2

    Jan 2024 - Dec 2024

    Led the redesign of the legacy MongoDB database into a denormalized content model, embedding related authors, images, and products within content documents.

    Eliminated cross-collection lookups for content retrieval, achieving average database retrieval times of 1 ms.

    Kept denormalized content synchronized through an eventual consistency model capable of propagating updates across 200,000 documents in approximately one minute.

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  • Staff Software Engineer

    Apr 2022 - Jan 2024

    Led the consolidation of insider.com into businessinsider.com, migrating 500,000 articles with zero downtime and no loss of SEO performance.

    Received Business Insider's 2023 Tech MVP Award.

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  • Senior Software Engineer

    Jul 2021 - Mar 2022

    Built on-the-fly affiliate link generation and product management capabilities for the Service Journalism team, automatically affiliating millions of links each day.

    Introduced product-click analytics to support data-informed business and editorial decisions and identify successful article formats that could be reused.

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• Advanced Programmer Analyst

  QAT Global

  Dec 2020 - Jun 2021

  Developed and maintained a utility automation application using Java, Spring Boot, and SQL Server as part of a 14-person Scrum team.

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• Co-founder and Software Engineer

  3r Agência

  Oct 2016 - Dec 2020

  Co-founded a digital agency and delivered custom software for businesses, leading projects from requirements and UX design through launch using Java, Spring Boot, and JavaScript.

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• Tech Lead @ Database Group

  Universidade Estadual Paulista Julio de Mesquita Filho

  Jan 2016 - Apr 2018

  Led a four-person team building a research analytics platform for exploring academic output and collaboration data, defining requirements, schedules, and technical direction.

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• Software Engineer @ Database Group

  Universidade Estadual Paulista Julio de Mesquita Filho

  Jan 2014 - Dec 2015

  Built and maintained research and academic systems using Java, Spring Boot, and PostgreSQL, with responsibility for database administration and testing.

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Additional Experience

• Co-founder

  3R Eventos

  Feb 2018 - Jan 2024

  Co-founded an events business, managing budgets, suppliers, and teams of more than 100 professionals, with events hosting up to 5,000 guests.

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Skills

• Backend and Platforms

  Node.js, Go, Java, GraphQL, REST APIs, distributed systems, and Kafka.

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• Architecture and Leadership

  System design, technical strategy, cross-team delivery, mentoring, and engineering standards.

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• Data and Infrastructure

  MongoDB, PostgreSQL, Elasticsearch, Docker, Kubernetes, and CI/CD.

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• Web and Mobile

  React, React Native, TypeScript, JavaScript, HTML, and CSS.

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• AI-Assisted Development

  Code generation, refactoring, testing, and review of AI-generated output.

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