Krešimir is a skilled DevOps/System Engineer with 12+ years of hands-on industry experience working on the iteration of solutions for data acquisition, storage, processing and analysis. He employs a detail-oriented and highly focused approach to security, automation, and reliability on projects; always looking for challenging ways to improve his existing skillset and expertise.
Provided expertise on mission critical LAMP stack for Magento eCommerce platforms and managed/monitored 50+ AWS Linux EC2 instances.
Deployed Imperva Incapsula WAF for web protection, configured TeamCity CI/CD pipelines for automated deployments and reduced loading times using various caching methods and CDNs.
Deployed multiple layers of caching (CDN, HAProxy, Varnish, Nginx) to significantly lower TTFB on e-commerce sites with a direct correlation between speed and sales conversion.
Worked on the Python SMPP backend solution based on the Twisted network engine which had become a bottleneck and the business was struggling for further growth. The solution increased throughput by 20 times; enabling multiple instances of the backend app to run in parallel. The backend solution is currently in production.
Supervised the migration of different environments (Python, Java, PHP) to a Docker-based environment. This improved the deployment to development environment based on Docker images, and quicker rollbacks. The new solution is being used in the client's development environment.