Boldizsar Akos Mezei, Back-end Development Developer in Budapest, Hungary
Boldizsar Akos Mezei

Back-end Development Developer in Budapest, Hungary

Member since February 18, 2020
Boldizsar is a Java/Scala back-end developer who has worked at Morgan Stanley on a group of microservices. His primary focus is backend development but he is also open for Android development. Boldizsar considers himself a hybrid in the sense that he is highly business-focused. When dealing with tasks, he would rather choose the inconvenient, unusual way to achieve the best outcome both for the client and the project itself.
Boldizsar is now available for hire




Budapest, Hungary



Preferred Environment

Linux, IntelliJ, Windows

The most amazing...

...thing I have done was reduce the data size transferred over the network between micro services by 50%.


  • Java/Scala Developer

    2018 - PRESENT
    Morgan Stanley
    • Upgraded a group of microservices to use a more efficient way of serializing and sending data through the web. Transferring the same amount of information in a 50% smaller size reduced execution time and running costs for the firm.
    • Collaborated with peers around the world (i.e India, London, New York) to upgrade a legacy Java system to use the most up to date Java, Gradle, and Spring versions.
    • Created an API for an immense Scala-based back-end project. This allowed several upstream services to communicate directly with this component thus allowing the smoothest flow for million dollars worth of transactions.
    • Onboarded Agile methodologies that increased developer productivity by 30% and reducing time to market by 20%.
    • Mentored several new team members and junior software developers, both personally and professionally.
    Technologies: Java, Scala, Spring, Google Protocol Buffers, Gradle


  • Portfolio Risk and Margin Calculator (Development)

    I was a back-end developer for a Java-based application, organized into microservices. The project's main goal was to provide real and non-real-time risk and margin calculations for portfolios. My main task was to onboard new functionalities and upgrade the current system to use the newest technologies. While doing so, I had to communicate and coordinate tasks around the world as the global team sits in India, London, and New York as well.

  • Using Kotlin for Back-end Development: A Quick Overview (Publication)
    Kotlin has features that make it an ideal language for back-end development. Learn what these features are and how you can use them to create high-performing systems.


  • Languages

    Core Java (J2EE), Kotlin, SQL, Java, TypeScript, JavaScript, CSS, HTML, Rust, GraphQL
  • Frameworks

    Jest, Spring, Ktor, Spring Boot, JUnit, Material-UI, Google Protocol Buffer, React Native, Flutter, Express.js
  • Libraries/APIs

    REST APIs, Stripe API, Stripe, Stripe Connect API, React, Node.js
  • Tools

    GitHub, Jira, Git, IntelliJ, Android Studio, Perforce, Mongoose
  • Paradigms

    Requirements Analysis, Scalable Application, Asynchronous Programming, Concurrent Programming, Microservices, Microservices Architecture, REST, Agile, Model View Viewmodel (MVVM), Clean Architecture, Scrum, Testing, Test-driven Development (TDD), DevOps
  • Platforms

    Firebase, Linux, Android, Docker, Windows, Visual Studio Code, Azure
  • Storage

    Cloud Firestore, Databases, PostgreSQL, NoSQL, MySQL, MongoDB
  • Other

    Web App Deployment, Single-page Applications (SPA), Back-end, Scalable Web Services, Serverless, Lambda Functions, SaaS, Firebase Cloud Functions, Back-end Development, RESTful Microservices, Multithreading, APIs, Architecture, Stripe Payments, Message Queues, Full-stack, AWS
  • Industry Expertise



  • Bachelor's degree in Computer Science
    2015 - 2018
    BabeČ™-Bolyai University - Cluj Napoca, Romania

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