Mateusz Szepietowski

Design and development of web applications and system integrations using Node.js, Oracle APEX, and REST API. Creating and optimizing Oracle and PostgreSQL databases–schema design, PL/SQL procedures, indexing, query tuning. Deploying applications and test environments in the cloud (Oracle Cloud Infrastructure, AWS) using Docker and Kubernetes. Creating and maintaining CI/CD pipelines (Bitbucket Pipelines/Git+Nexus /Docker Registry). Working in agile methodologies–integration with Jira, Bitbucket, Git tools.

Designed and provisioned Oracle Autonomous Databases and Oracle Database instances in OCI. Designed and developed low-code web applications in Oracle APEX, integrated with Oracle databases and RESTful Web Services (ORDS). Developed Node.js applications and microservices in Oracle Cloud Infrastructure (OCI), integrated with Oracle APEX via REST APIs and direct database connections. Developed scripts in PL/SQL, Python, and Bash for automation, data processing, and system maintenance tasks.

Deployment of containers in Kubernetes. Integration of many APIs. Architecting Docker containers to optimize migration and data transfer for Oracle and PostgreSQL databases. Management of version control in projects. Implementing automation through Bash, SQL, PL/SQL, and Python scripting.

Improved system performance by 40% through SQL query optimization and PostgreSQL index restructuring. Automated Ubuntu server installation and configuration with Puppet, cutting manual effort by 70% and errors by 85%. Developed Ansible playbooks to reduce Linux configuration time by 65%. Managed Linux clusters via DC/OS, boosting resource efficiency by 45%. Configured servers using Foreman, decreasing setup time by 65%.