Simão Júnior

Simão Júnior

Software Developer in São Paulo, Brazil

simaojunior

About

Hi, I’m Simão Júnior, a self-taught software engineer based in São Paulo. My main focus is backend development, where I build scalable, efficient systems and solve complex technical challenges. I currently work at Caveo, building a financial platform that simplifies company management and banking for doctors.

Over the past 4 years, I’ve been focusing on backend technologies, working extensively with JavaScript, TypeScript, and Node.js. I have experience with the AWS ecosystem (Cognito, SQS, SNS), Postgres, and Docker. I’ve also been contributing to projects using Elixir and related tools. My passion lies in architecting robust backend solutions and infrastructure, with a particular interest in distributed systems.

Outside of work, I’m continuously learning across tech and other domains. I’m an avid reader of sci-fi and literature on digital products and technology. When I’m not coding, I enjoy spending time with my wife, Kelly and our cat, Yuki. I also enjoy going to the gym and occasionally wrestle with NixOS (I use NixOS BTW).

I’m always open to new collaborations and technical discussions. Let’s connect!

Contact

Work Experience

  • 2025 — Now

    Sofware Engineer

    Caveo Tecnologia ↗

    Currently building a financial platform for doctors, simplifying company management (PJ), accounting, and banking integration. Responsibilities include:

    • Developing and maintaining backend services using KoaJS and TypeScript.
    • Designing and implementing microservices using Clean Architecture and DDD principles.
    • Leveraging the AWS ecosystem (Cognito, SQS, SNS) for scalable and secure solutions.
    • Managing data with Postgres.
    • Containerizing applications using Docker.
    • Collaborating with the product team to deliver features that help doctors manage their financial journey.

    Tools used: AWS (Cognito, SQS, SNS), Postgres, KoaJS, TypeScript, Docker.

  • 2021 — 2025

    Sofware Engineer

    Nextcode ↗

    Currently building a onboard platform. Responsibilities include:

    • Build new features into the app using NodeJS and Typescript.
    • Maintain the app and fix bugs.
    • Work closely with the product team to understand the needs of the business and the users.

    Tools used: NodeJS, VueJs, TypeScript, MongoDB, Redis, Nats, Docker and Microservices.