George Dumitru - IT Consultant, MSG Systems

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Work Background

msg systems RomaniaIT Consultant

Nov. 2022Cluj, RomâniaIn my current role, I am actively involved in developing and optimizing a microservice architecture, leveraging advanced technologies and methodologies to enhance application scalability and security. My ongoing contributions and technology engagements include: - Developing microservices using Java Quarkus and its extensions, emphasizing efficient, maintainable code. - Designing and implementing RESTful APIs with JAX-RS and Hibernate Validator, ensuring robust data validation and seamless service integration. - Utilizing ORBIT and AWS Elastic for resource orchestration, enhancing the scalability and deployment efficiency of our services. Implementing secure authorization mechanisms using IAM roles with OIDC, PKI, and certificates. - Configuring Quarkus within an MRP setup for optimal system clearance and architecture robustness. - Employing Grafana and Dynatrace for real-time monitoring, achieving high performance and system reliability. - Actively migrating services to AWS, showcasing my proficiency in cloud service management and deployment. In this role, I am continually applying cutting-edge technologies to address complex challenges, delivering scalable, secure, and efficient microservice architectures that propel the organization forward.

msg systems RomaniaIT Consultant

Apr. 2021 - Apr. 2022Cluj, RomâniaIn my role as IT Consulant, I was instrumental in developing and maintaining a microservice architecture, emphasizing modern, efficient, and scalable solutions. Key highlights of my responsibilities and the technologies I utilized include: - Developed microservices using Java Quarkus framework and its extensions, optimizing for performance and maintainability. - Designed and implemented RESTful APIs with JAX-RS, ensuring robust data validation with Hibernate Validator. - Initiated and managed a Kubernetes cluster with minikube, facilitating the orchestration of containerized applications. - Deployed a PostgreSQL Database on Kubernetes, demonstrating adeptness in managing database services within containerized environments. - Leveraged Quarkus for building container images and automating Kubernetes manifest generation, streamlining deployment processes. Additionally, I expanded my expertise in: - Crafting and consuming GraphQL APIs. - Documenting APIs with Swagger and OpenAPI specifications. - Utilizing OpenShift for enhanced container orchestration and application scaling. - Implementing security best practices with Vault. - Streamlining development workflows with Skaffold. - Developing front-end interfaces with Angular. This role enabled me to significantly contribute to the project's success by applying a broad range of cutting-edge technologies and methodologies.

Code4NordJava Software Engineer

Apr. 2022 - Nov. 2022As a Java Software Engineer at Code4Nord, I played a key role in developing a robust security system designed to enhance data protection across multiple applications. Here's a brief overview of my involvement and the technologies we utilized: - Spearheaded the development of a security system using Java, integrating JSF for robust user interfaces and employing HTML, CSS, and JavaScript for front-end development. - Implemented a format-preserving encryption and decryption mechanism, crucial for securing sensitive data while maintaining its usability within various applications. - Developed a unique circular software approach, enabling the application of our proprietary algorithm across different platforms to obscure and protect real data effectively. This project allowed me to deepen my expertise in secure software development, delivering a solution that significantly enhances data confidentiality and integrity within enterprise environments.

IBMBMW Application Developer - Java & Web Technologies

Mar. 2020 - Apr. 2021Braşov, RomâniaIn my role as Application Developer at IBM, I leveraged a diverse set of technologies and frameworks to deliver high-quality software solutions and support, significantly contributing to various projects. Here's an overview of the key skills I applied and developed during my tenure: Core Technologies & Frameworks: - Applied Java Web (JEE) expertise in building robust server-side components. - Utilized ExtJS and Angular frameworks to create responsive and intuitive front-end interfaces. - Developed efficient client-side scripting with JavaScript. - Implemented .NET and C# solutions to enhance back-end functionalities. - Employed Eclipse RCP for developing rich client applications. Database Expertise: - Managed and optimized Oracle DB, Postgres DB, SQLite, and MS SQL databases, ensuring data integrity and performance. Server Management & Operating Systems: - Configured and maintained Apache and Glassfish servers to support enterprise applications. - Operated within Linux and Windows (7 & 10) environments, ensuring optimal system performance. DevOps & Development Tools: - Utilized Loadrunner for performance testing and Fortify for identifying security vulnerabilities. Employed Bitbucket for version control, Jenkins and Nexus for continuous integration/delivery, and - -Maven for dependency management. - Ensured code quality and maintainability using Sonar. Specialized Solutions: - Engaged with Aras Innovator for product lifecycle management, adapting it to meet specific business requirements. - Gained experience with ASAM ODS and openMDM for efficient automotive data management.

IBMApplication Maintenance & Support BMW

Jun. 2019 - Mar. 2020Brasov County, RomaniaIn this role, I focused on Application Maintenance and Support across a variety of technologies, including Oracle SQL, PL/SQL, Postgres SQL, Linux, Apache, Glassfish, and Java. My responsibilities encompassed a broad spectrum of critical functions: - Conducting thorough code analysis to identify and rectify bugs, ensuring the robust performance and reliability of applications. - Engaging in detailed incident analysis, pinpointing root causes to prevent future occurrences and streamline application functionality. - Collaborating closely with customers during meetings to align our technical solutions with their business objectives and prioritize actions based on their needs. Key Skills Developed: - Advanced problem-solving through structured and algorithmic thinking. Proficiency in Java, with a strong grasp of OOP principles, Hibernate, JSE Algorithms, Maven, and Junit testing. - In-depth expertise in database management and optimization for Oracle SQL and Postgres, encompassing relational database design, efficient querying, and comprehensive understanding of DDL and DML operations. - Through these experiences, I honed my technical skills and developed a keen understanding of customer engagement and solution delivery in a dynamic environment.

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