Zoltan Polgar

I’m Zoltan Polgar, a software engineer with over 15 years of experience in designing, building, and operating software systems. I currently work as a DevOps Engineer at Vanguard, focusing on cloud infrastructure, containerized environments, and application reliability using technologies such as AWS, Docker, and Spring.

Throughout my career, I have contributed to a wide range of projects across multiple industries, gaining experience in building scalable systems and supporting complex production environments. My background includes strong expertise in Java-based development, as well as hands-on experience with technologies such as Terraform, container orchestration, and infrastructure automation.

I have worked with several programming languages, including Java, Kotlin, Scala, and Python, and have been involved in modernizing applications and improving deployment processes. I approach engineering challenges with a focus on reliability, maintainability, and practical solutions, and I am comfortable adapting to new tools and technologies when required.

- Lead migration of legacy Spring Boot services to modernized infrastructure, improving scalability and deployment reliability
- Manage and maintain Docker Swarm clusters running multiple Spring Boot microservices in production environments
- Design and provision AWS infrastructure using Terraform (Infrastructure as Code), improving consistency and reducing manual configuration effort
- Migrate and consolidate Git repositories while preserving history and standardizing development workflows across teams
- Develop Bash automation scripts to streamline operational tasks and reduce manual intervention
- Collaborate with development teams to improve CI/CD pipelines and deployment processes
- Troubleshoot infrastructure issues and optimize performance across distributed systems
- Contribute to infrastructure cost optimization and overall system reliability

- Developing and designing RESTful services using Spring Boot
- Developing custom JUnit5 extensions
- Creating and maintaining Azure DevOps pipelines
- Working with SQLite data models
- Maintaining virtual machines running in Azure
- Performing application releases and deployments
- Suggesting internal process improvements
- Suggesting legacy system migration strategies
- Using Azure DevOps to report problems and document defects
- Occasionally working with Typescript and Angular

- Developed and designed RESTful services using Spring Boot
- Created containers in Docker
- CreatCreated and maintained GitLab pipelines
- Worked with MySQL and MSSQL data models
- Performed application releases and deployments
- Created CD process to include support building of Docker Images and publish into Amazon ECR
- Created a staging environment from scratch using GitLab pipelines, watchtower and Amazon EC2
- Designed solution architectures and suggested internal process improvements
- Suggested legacy system migration strategies
- Used Jira and Confluence for reporting problems and document defects

- Developed and designed RESTful services using Spring Boot
- Managed Kubernetes charts using Helm
- Created reproducible builds of the Kubernetes applications, managed Kubernetes manifest files and Managed releases of Helm packages
- Created and maintained Jenkins pipelines and shared libraries
- Created CD process to include support building of Docker Images and publish into a private repository
- Created Containers in Docker
- Designed solution architectures and suggested internal process improvements
- Wrote automated performance tests using JMeter
- Worked on Cassandra Data modelling, NoSQL Architecture
- Maintained Scala codebase
- Designed and developed a chatbot application using the Messenger Platform
- Involved in migrating data from MySQL to PostgreSQL

- Developed client slide components utilizing Java Swing framework
- Developed screen flows and new window layouts
- Participated in process designing and strategic communication development
- Supported clients in forum and calls
- Developed Slack integration
- Improved CI/CD Jenkins pipeline companywide
- Planned and executed several refactoring on a legacy codebase
- Wrote automated test using BDD framework Cucumber and Gherkin
- Researched new possible ways to test the application

- Developed new applications and added functionality to existing applications using Apache Camel, Apache ActiveMQ and Spring Boot technologies
- Used Jira to document defects and report problems
- Developed UIs with PhoneGap, Angular, JavaScript, HTML and CSS
- Developed Java modules with Agile and other standard methodologies
- Developed UI components with Eclipse RCP
- Create and execute test cases in JUnit for unit testing of application
- Supported new colleagues onsite

- Utilized object-oriented programming and Java for creating business logic
- Developed desktop application written in SWT and JFace
- Implemented multi threading and exception handling to improve application functionality
- Developed UIs with GWT, JavaScript, HTML and CSS
- Developed testing framework written is Perl

- Developed insurance premium calculation engines in PHP
- Utilised programming capabilities in PHP, SQL and Javascript and other libraries as needed
- Developed UIs with JavaScript, HTML and CSS
- Create and execute test cases in SoapUI