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Matheus VianaMV

Matheus Viana

Software Engineer

€550/day
Berlin, DE
3-7 years

Average response time: 1 hour

About Matheus

I am a Backend Developer with over 7 years of experience building secure and scalable cloud-native applications. I specialize in creating robust backend architectures and delivering maintainable code using Node.js, NestJS, and TypeScript.

My primary focus is on solving complex backend challenges, optimizing processes, and resolving critical bugs to ensure a fast, reliable user experience. I design systems built for scale, frequently utilizing microservices and event-driven architectures with RabbitMQ. Additionally, I have a strong track record of implementing secure authentication flows, including Two-Factor Authentication (2FA) and OAuth2/JWT , as well as rolling out comprehensive role-based permission systems.

Core Expertise:
  • Languages & Frameworks: Node.js, NestJS, TypeScript, C#, .NET.

  • Cloud & DevOps: AWS, Docker, CI/CD pipelines. Databases: PostgreSQL, MySQL, MongoDB, Redis.
  • Architecture: REST APIs, Microservices, RabbitMQ message brokering.
Whether you need to build a new cloud-native application from scratch or modernize an existing system for better scalability and maintainability, I provide end-to-end technical execution. I offer full professional proficiency in English, enabling seamless communication and collaboration with distributed teams.
  • Portuguese

    Native or bilingual

  • English

    Fluent

  • Spanish

    Conversational

  • German

    Basic

Can work on-site
Berlin (up to 30km)

Experience

  • Saal Digital Röttenbach
    Backend Developer
    January 2024 - January 2025 (1 year)
    Nürnberg, Germany
    Developed and maintained backend features in a hybrid Node.js / .NET environment. Implemented Two-Factor Authentication (2FA), increasing account security and reducing risks of unauthorized access. Built QR code sharing functionalitythat enabled photographers to collaborate more effectively. Designed and rolled out a role-based permission system, improving workflows and reducing access errors. Optimized backend processes and resolved critical bugs, resulting in a smoother and faster user experience.
    Node.js C# JavaScript React.js PostgreSQL
  • BTG Pactual
    Full-stack Developer - .NET
    January 2021 - April 2024 (3 years and 3 months)
    São Paulo, Brazil
    Led the development and continuous improvement of a credit engine for agricultural producers, supporting one ofthe market's largest SME portfolios. Implemented and optimized business rules for credit scoring and limit calculation, directly impacting financial decision-making accuracy. Collaborated with product and business teams to refine features, ensuring alignment with real-world financial requirements. Modernized the system by adopting .NET 7, PostgreSQL, AWS, and Docker, following industry best practices to ensure scalability and maintainability. Applied modern backend practices (CI/CD, containerization, cloud) that are directlytransferable to Node.js environments.
    C# React.js AWS Azure DevOps PostgreSQL
  • MJV - Santander AutoCompara
    Full-stack Developer
    January 2019 - January 2020 (1 year)
    São Paulo, State of São Paulo, Brazil
    Implemented the NestJS framework in the backend, establishing a scalable and maintainable foundation for future development. Built a robust quoting system that compared market values and presented users with the best options, improving decision-making. Designed and implemented a vehicle inspection module, streamlining onboarding for both new and used vehicles. Developed the frontend in Angular, delivering a user-friendly and intuitive interface. Integrated multiple AutoCompara partners, giving users a comprehensive set of offers and eliminating reliance on brokers. Leveraged Node.js, MySQL, Docker, and AWS to ensure system performance, efficiency, and scalability.

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Education

  • Artificial Intelligence Engineering Bootcamp
    Artificial Intelligence Engineering Bootcamp
  • TECHNICIAN IN INTERNETCOMPUTING
    ITB Prof.ª Maria Sylvia Chaluppe Mello
    TECHNICIAN IN INTERNETCOMPUTING

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