Олександр

Yatsyshyn Oleksandr DevOps Engineer
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Kyiv, Ukraine yatsyshyn-489695182/

Profile
DevOps Engineer with 5+ years of experience in IT operations, including 3+ years focused on cloud-native infrastructure.
Specialist in building reliable AWS environments, managing Kubernetes at scale, and implementing GitOps practices. Strong
advocate for automation and observability to ensure system stability and cost-efficiency.

Technical stack
Cloud & Infrastructure: AWS (EKS, ECS, EC2, S3, RDS/​Aurora, DynamoDB, Lambda, ElastiCache, VPC, IAM, CloudWatch,
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Secrets Manager).
Infrastructure as Code: Terraform, Terragrunt (modular, multi-environment setups).
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Containers & Orchestration: Kubernetes, Amazon EKS, Amazon ECS, Docker, Helm.
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CI/CD & GitOps: GitHub Actions, Argo CD, Jenkins, TeamCity.
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Observability & Logging: Prometheus, Grafana, Loki, Tempo, OpenTelemetry, ELK/​OpenSearch.
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Languages & Automation: Python (automation scripts), Bash, SQL.
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Networking & Security: Service Mesh (Istio), Load Balancing (ALB/​NLB), RBAC, IAM Policies.
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Professional Experience
01/2023 – Present airSlate, DevOps Engineer
Designed and maintained a high-availability AWS infrastructure across 5 regions and multiple
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accounts, ensuring disaster recovery and compliance.
Managed and operated 10+ Kubernetes clusters (Amazon EKS), migrated 50+ services to
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Kubernetes.
Designed modular Terraform infrastructure for multi-environment setup.
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Automated application delivery using ArgoCD and Helm, implementing GitOps best practices.
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Improved CI/​CD workflows (GitHub-based pipelines).
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Implemented monitoring and observability solutions (Grafana, OpenTelemetry).
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Ensured system reliability, scalability, and security best practices.
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Supported high-load production environments and incident response processes.
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08/2021 – 01/2023 airSlate, Technical Support Engineer (DevOps team)
Provided technical support for a large-scale microservices architecture consisting of 1,000+
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services across 30+ AWS accounts.
Assisted with CI/​CD pipelines and containerized workloads.
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Diagnosed complex issues in production and staging environments.
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Worked closely with engineering teams to resolve infrastructure issues.
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01/2018 – 07/2021 Wnet, Telecommunications Engineer
Managed NAT and DHCP servers.
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Monitored network health using Zabbix, Nagios, Grafana, and Kibana.
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Configured L2/​L3 hardware (Juniper, Cisco, D-Link, MikroTik).
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Administered UNIX-based operating systems. Troubleshooted problems with Linux servers.
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Education
09/2015 – 07/2019 Bachelor’s degree, Telecommunication Systems and Networks,
Kyiv, Ukraine National Technical University of Ukraine 'Kyiv Polytechnic Institute'​
09/2019 – 12/2020 Master's degree, Telecommunication Systems and Networks,
Kyiv, Ukraine National Technical University of Ukraine 'Kyiv Polytechnic Institute'​

Languages
English Ukrainian
(Intermediate) (Native)