DR. Roman Čerešňák
AWS/Azure Cloud ArchitectHighlights
Resume
Education
Faculty of Management Science and Informatics, University of Žilina
Faculty of Management Science and Informatics, University of Žilina
Faculty of Management Science and Informatics, University of Žilina
Professional Experience
AWS Solution Architect – Tech Lead
As a Cloud Architect, I design scalable, high-availability, and fault-tolerant solutions on AWS. I lead cloud migrations and provide expert guidance throughout the architecture lifecycle. My focus is on infrastructure automation with Terraform, implementing CI/CD using GitHub Actions and AWS CodePipeline, and establishing observability with AWS CloudWatch, Prometheus, and Grafana. I also build GenAI PoCs with Amazon Bedrock and SageMaker to enable serverless ML workflows.
Solution Architect – Team Leader
Led cloud-native initiatives for the Slovak Ministry of the Interior. Designed secure, highly available AWS architectures and automated deployments using Terraform. Managed CI/CD pipelines and implemented centralized monitoring. Promoted DevOps culture and created architectural documentation aligned with TOGAF and ArchiMate.
AWS/Azure Solution Architect
Designed and implemented cloud solutions for banking clients (e.g., PSS, Tatra Bank). Delivered RFPs, POCs, and production-ready architectures using AWS and Oracle Cloud. Automated infrastructure using Terraform and Helm. Provided customer workshops and led partner integrations.
AWS Solutions Architect
Created cloud architectures for large-scale data platforms. Deployed monitoring stacks (Grafana, Prometheus), ETL workflows, and Apache Airflow pipelines. Automated Kubernetes infrastructure with Terraform and GitHub CI/CD pipelines.
AWS DevOps Engineer – Freelancer
Delivered DevOps solutions for a fitness app with video streaming features. Managed EKS and CloudFront infrastructure. Automated deployments with Terraform and CloudFormation. Enhanced observability and security for Kubernetes clusters using Fluentd and NetworkPolicies.
Web Developer
Built microservices and APIs for pharmacy logistics. Integrated third-party systems, handled database design, and implemented front-to-back communication.
.NET Web Developer
Developed backend logic for .NET applications, database design with MSSQL, and ensured robust communication between frontend and backend components.
C# and SQL Developer
Modernized legacy systems and built scalable, modular solutions. Designed SQL procedures and integrated database logic with frontend apps.
Certifications
AWS Certified Solutions Architect - Professional
Amazon Web Services
AWS DevOps Engineer - Professional
Amazon Web Services
AWS Certified Advanced Networking - Specialty
Amazon Web Services
AWS Certified Machine Learning - Specialty
Amazon Web Services
AWS Certified Security - Specialty
Amazon Web Services
AWS Certified Solutions Architect - Associate
Amazon Web Services
AWS Certified Developer - Associate
Amazon Web Services
AWS Certified SysOps Administrator – Associate
Amazon Web Services
AWS Certified Data Engineer – Associate
Amazon Web Services
AWS Certified Data Engineer – Associate
Amazon Web Services
AWS Certified Cloud Practitioner
Amazon Web Services
AWS Certified AI Practitioner
Amazon Web Services
Microsoft Certified: Azure Solutions Architect Expert
Microsoft Azure
Microsoft Certified: Azure Administrator Associate
Microsoft Azure
Microsoft Certified: Azure Fundamentals
Microsoft Azure
Microsoft Certified: Azure Data Fundamentals
Microsoft Azure
Microsoft Certified: Azure AI Fundamentals
Microsoft Azure
Oracle Cloud Infrastructure for Sunbird Ed Specialty
Oracle Cloud
Oracle Cloud Data Management Certified Foundations Associate
Oracle Cloud
Oracle Cloud Infrastructure AI Certified Foundations Associate
Oracle Cloud
Oracle Cloud Infrastructure Certified Foundations Associate
Oracle Cloud
Oracle Cloud Infrastructure Certified Architect Associate
Oracle Cloud
Certified Kubernetes Administrator (CKA)
Cloud Native Computing Foundation
Certified Kubernetes Application Developer (CKAD)
Cloud Native Computing Foundation
HashiCorp Certified: Terraform Associate (002)
HashiCorp
Courses
OCI AI Certified Foundation Associate
Udemy - Oracle Cloud Infrastructure
Comprehensive course covering AI concepts, OCI AI services, and Generative AI fundamentals. Includes unique practice questions, detailed explanations, and exam-ready preparation for the 1Z0-1122-25 certification.
Oracle Cloud Infrastructure Foundations
Udemy - Oracle Cloud Infrastructure
Learn the fundamentals of Oracle Cloud Infrastructure (OCI), including cloud concepts, core services, pricing, and security. This course includes 140 unique practice questions, detailed explanations with references, and full coverage of the 1Z0-1085-25 exam topics.
Oracle Cloud Infrastructure Architect Associate
Udemy - Oracle Cloud Infrastructure
Comprehensive training for Oracle Cloud Infrastructure architecture, covering compute, storage, networking, identity, and cost management.
Oracle Cloud Infrastructure - Multicloud Architect Associate
Udemy - Oracle Cloud Infrastructure
Master the art of building resilient, scalable, and interoperable cloud architectures across AWS, Azure, and OCI – through scenario-driven tests that reflect real-world multicloud complexity.
Oracle Cloud Database 2024 Migration and Integration
Udemy - Oracle Cloud Infrastructure
A complete guide to modernizing your database strategy in 2024 with Oracle Cloud. This course covers best practices for migrating on-premise and cloud databases to Oracle Cloud Infrastructure (OCI), integrating with external systems, automating data flows, and ensuring performance, scalability, and security in the cloud.
Microsoft Azure Data Fundamentals-DP-900 Practice Tests 2023
Udemy - Microsoft Azure
Comprehensive practice test set covering core data concepts on Azure – including relational, non-relational, analytics, and data services – designed to fully prepare you for the DP-900 certification exam.
Conferences
AWS Community Day Slovakia
Kosice, Slovakia
The premier cloud community event in Slovakia, bringing together AWS enthusiasts, experts, and builders to explore the latest AWS innovations, attend hands-on sessions, and connect with the local tech community.
AWS Community Day CZ
Prague, Czech Republic
The premier, community‑driven AWS event in Czechia, bringing together AWS Heroes, developers and cloud enthusiasts for a full‑day of keynotes, technical talks, hands‑on sessions, and networking opportunities at Prague’s O2 Universum.
Finweek
Bratislava, Slovak Republic
A conference session in Slovakia presenting an advanced fraud-detection solution for payment systems — bringing together AWS experts, developers, data engineers, and financial-sector professionals for a deep dive into real-time detection architecture, machine-learning approaches, technical insights, and hands-on demonstrations powered by AWS services.
ESG by GreenTalk
Bratislava, Slovak Republic
A session at the ESG INSPIRE by GreenTalk conference in Slovakia showcasing how AWS cloud solutions can drive business value and sustainability — highlighting benefits of the AWS platform and exploring proof-of-concept (PoC) funding opportunities, gathering AWS experts, developers, data engineers and sustainability-focused business professionals for practical insights, architecture talk and financing pathways.