Mislav – AWS, Kubernetes, Python

A white-label B2B iGaming platform delivered as a full-service solution, covering the infrastructure and technology required to operate and scale multiple client brands. The platform runs on AWS using EKS, with supporting services including ElastiCache Redis, RDS PostgreSQL, RabbitMQ, and a range of monitoring and deployment tools. The project involves managing infrastructure across multiple brands, including logging, traffic management, environment setup, deployments, and platform expansion.

• Owned production infrastructure, CI/CD, observability, and reliability across the platform;
• Provisioned and managed EKS clusters with Terraform and configured VPC networking and routing;
• Migrated cluster scaling to Karpenter from Cluster Autoscaler;
• Managed EBS volumes for ClickHouse and migrated Loki storage from EBS to S3;
• Built and maintained GitHub Actions CI/CD pipelines and migrated from self-hosted runners to external runners;
• Optimized Docker images by caching Node.js dependencies and reduced build time by 30%;
• Reduced infrastructure costs by analyzing resource utilization and right-sizing compute instances;
• Owned production observability and incident response, including alert thresholds, routing, escalation, and on-call processes;
• Collaborated directly with customers and C-level stakeholders to translate business requirements into infrastructure solutions.

A management platform developed for a non-profit organization to streamline the administration of competitions and related media content. The platform supported competition management, real-time streaming, and file management, allowing users to access and download recorded broadcasts.

• Designed and developed the entire project infrastructure;
• Developed the majority of the backend functionality;
• Built and maintained the backend services supporting competition management and real-time streaming;
• Implemented file management functionality for storing and downloading recorded broadcasts.

A cloud platform designed for financial services organizations to securely host and run their applications. The project focused on building an event-driven platform that provided a safe, secure, and compliant cloud environment for multiple teams to deploy and manage their applications and services. The platform supported standardized infrastructure and operational processes, enabling teams to securely host and scale their workloads within a controlled cloud environment.

• Oversaw AWS infrastructure across a large-scale cloud environment within the financial services domain;
• Built event-driven AWS account management solutions using Lambda, Python, and TypeScript;
• Designed and maintained IAM roles, KMS policies, and least-privilege access controls;
• Automated infrastructure provisioning with AWS CDK, Terraform, and Serverless;
• Applied security and compliance requirements aligned with German and European regulations.

A backend platform supporting trading operations in the betting industry, focused on processing betting tickets with sub-0.5-second latency. The platform evaluated incoming tickets in real time, identified potentially risky bets, and performed risk assessments to help minimize potential financial losses for the business.

• Developed backend services in Go for internal trading tools;
• Optimized OpenSearch queries to improve performance and resource efficiency;
• Participated in the production on-call rotation and responded to live incidents;
• Enhanced Grafana dashboards, monitoring, and alerting to improve system visibility and incident response.