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.
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.
Work history
UpStack
DevOps/System Engineer
2019 - Present (4 years)
Remote
Creating and developing innovative software solutions for clients across a broad range of industries.
Participate in scrums consisting of cross-functional teams, both software and hardware.
Ensure that features are being delivered efficiently and on-time.
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.