• Consulted the current engineering team on how to optimize their landscape, focusing on improving system performance and scalability• Established comprehensive metrics for back-end, database, and RabbitMQ servers, enabling detection of performance bottlenecks• Developed load tests using the JMeter framework to simulate high traffic, allowing for rapid performance testing after each incremental change• Implemented performance optimization techniques such as JPA entity relationships refinement, caching, query optimization and code refactoring which resulted in a 30% reduction in CPU usage, a 40% decrease in memory usage, and a 70% reduction in number of queries𝘛𝘦𝘤𝘩𝘯𝘰𝘭𝘰𝘨𝘪𝘦𝘴: Java 17, Spring Boot Actuator, Hibernate, MySQL, Prometheus, Grafana, JMeter, Hazelcast, RabbitMQ

• Led a team of 5 engineers, mentoring team members on best practices and implementation approaches, conducting extensive code review and promoting scrum practices• Designed high level architecture, implemented and took ownership of several services including Accounting, Payment and Reporting services• Developed integrations with third-party systems such as ABN Amro, Rabobank, Adyen, and MailToPay, resulting in collection of over €1 million daily• Packaged hardware simulators into Docker images and deployed them to AWS ECS using Terraform, eliminating the need to ship physical safes to clients which completely removed associated costs• Wrote automated tests including unit, integration, acceptance and contract which increased code quality and boosted confidence in rapid development of new features• Worked on migration from monolithic to an event-driven microservice architecture which resulted in a more scalable and maintainable landscape𝘛𝘦𝘤𝘩𝘯𝘰𝘭𝘰𝘨𝘪𝘦𝘴: Java (8, 11, 17, 21), Spring Boot, Hibernate, PostgreSQL, Flyway, RabbitMQ, Docker, Cucumber, Jira, Jenkins, Gradle, Maven, Angular, AWS, ECS, ECR, S3, Lambda, SQS, Terraform

Occupational Safety Sector• Gathered business requirements from stakeholders• Designed high level architecture and planned the implementation details • Developed back-end and front-end solutions• Set up infrastructure on AWS• Presented the implementation to stakeholders𝘛𝘦𝘤𝘩𝘯𝘰𝘭𝘰𝘨𝘪𝘦𝘴: Java 11, Spring Boot, Hibernate, PostgreSQL Angular, Gradle, AWS, EC2, S3, IAM, Route53, Nginx, PostgreSQL

• Industry 4.0 research and development project focused on a robust Plug-and-Play mechanism and easily creatable and configurable production processes• Exposed RESTful APIs for production process components and machines𝘛𝘦𝘤𝘩𝘯𝘰𝘭𝘰𝘨𝘪𝘦𝘴: Java 8, Spring Boot, Hibernate, Oracle Database, Maven, Git, Linux

Lectured and prepared students for college exams in various programming languages including Java, C++, Matlab etc.

Student teaching assistant in course "Computer Architecture".