Marcell Gyöpös

Experience

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  Sysdata PSE (Program and System Engineering)

  May 2018 - Feb 2019

  Junior Java Developer

  Client-server application development on the backend side - I used jenkins server for continous integration - Managed the projects with maven build tool - Developed the database with Oracle SQLUnit and Integration testing - I used Arquillian to make automated integration tests

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  Liferay

  Mar 2019 - Jul 2021

  Software Engineer

  Contributed to Liferay, an open-source framework, offering clients customizable solutions. Successfully maintained a complex application with millions of lines of code and undocumented features. Ensured compatibility with various Liferay versions, demonstrating adaptability. Effectively handled client-reported issues and developments, showcasing strong debugging skills. Proficient in Java, JSP, React, CSS, and committed to continuous learning.

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  EPAM Systems

  Aug 2021 - Oct 2022

  Software Engineer

  Collaborated as a Java backend developer in a dynamic six-member team, delivering a greenfield system for a leading US telecoms company. Engaged in extensive proof-of-concept activities to identify optimal solutions, leveraging technologies like Kubernetes, Docker, Kafka, Spark Java 11, Spring, Cassandra, and MongoDB. Demonstrated versatility in adapting to evolving project phases.

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  Exadel

  Jul 2022 - May 2024

  Software Developer

  Led the takeover of a critical authorization module from a disbanded team, navigating challenges due to the absence of documentation. Successfully integrated the module to establish secure communication between microservices and end-users. Managed the proxy, employing Lua and Java for optimal performance. Contributed to a project focused on robust, secure communication.Championed a greenfield project, revitalizing an outdated system based on new requirements. Orchestrated a team of 10, spanning Java developers, QA developers, devops developers, and the architect. Implemented microservices with Kafka, Amazon S3, and PostgreSQL, using Java 17 and the Spring framework. Prioritized speed and high fault tolerance, ensuring a collaborative, efficient development process in two-week sprints. Adept at designing, implementing, testing, and documenting modules end-to-end. Show less

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  NN

  May 2024 - now

  Senior Java Software Engineer

  I lead the implementation of new IT standards for the Hungarian IT Department., including clean code practices, AI integration in the development process, optimizing pull request workows. I also drive the adoption of new testing, quality assurance, while transforming knowledge sharing and training initiatives. I also deliver presentations to promote a shift in the company’s development mindset.As a software developer, I also contribute to all stages of the development lifecycle, from planning and development totesting, documentation, and release management. We focus on refactoring and modernizing legacy systems. Show less