Антон

Oleshko Anton | CV
KIEV 02088 | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) ​
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Communication​
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Experienced DevOps Engineer with 6+ years in system
administration, hardware, and remote DaaS/SaaS services.
Proven experience leading teams as a technical lead and driving
delivery processes. Skilled in designing and building
infrastructure and architecture from scratch with a strong focus
on cost-efficiency. Successfully introduced and implemented
DevOps practices and culture in projects from the ground up.
Experienced in server delivery and installation in data centers,
with a solid hardware background.

Technical Skills & Expertise
●​ Cloud Platforms: AWS, GCP (Amazon EKS, EC2, ECS, Route 53, etc.).
●​ Virtualization: VMware, KVM, bare-metal clusters PVE (Proxmox)
●​ CI/CD Tools: GitLab CI/CD, GitHub Actions, Jenkins
●​ Containerization: Docker (swarm, docker compose), K8s
●​ Monitoring & Observability: Zabbix, Nagios, Prometheus, Grafana, AWS CloudWatch, ELK,
Graylog, VictoriaMetrics, Sentry
●​ OS: Linux (Debian, CentOS, Ubuntu), Windows, FreeBSD.
●​ Networking: DNS, OSI model (TCP/IP), SSL/TLS, router and switch configuration
●​ Server Management & Security: Server setup and configuration, DDoS detection and filtering,
HL/HA server optimization, ISO 27001 compliance, SSO integration and identity management
(OAuth2, SAML)
●​ Database Management: SQL, no-SQL, RDS (PostgreSQL, MySQL, Supabase, etc.)
●​ Web Stack: Nginx, Apache (LNMP, LAMP based)
●​ Automation & Scripting: Bash/Shell, Python, Ansible, YAML, Groovy
●​ Infrastructure as a Code (IaC): Terraform, Ansible
●​ Storage Systems: Ceph, RAID (software/hardware), S3

Goals
●​ Migration of HA cluster from cloud to bare-metal for cost-efficiency reasons.
●​ Setting up the algorithm of automatic backups on S3 and Dedicated Storage at the same time.
●​ Development of an algorithm for automated installation of servers in the data center through,
which greatly reduced the work of L2 support in several times.
●​ Development of fault-tolerant storage based on CEPH, w/o alternative solutions for now.
●​ Setting up a RAID-based fault-tolerant storage for “cold backup” of client data.
Experience
DevOps/SRE Engineer — IT SmartFlex MAR 2025 — THIS TIME
●​ Kubernetes orchestration on on-premises infrastructure
(cluster maintenance, scaling, etc.)
●​ Database management (PostgreSQL, replication, HA)
●​ High-availability storage setup (MinIO, Longhorn k8s)
●​ GitLab CI/CD pipelines (+ Flux, + ArgoCD)
●​ Infrastructure as Code integration (Terraform)
●​ Observability and monitoring (Sentry, Promstack, ELK, Vector)
●​ Message broker integration (Kafka)
●​ SSO implementation (Keycloak, LDAP, etc.)
●​ Incident management and on-call response (L2/L3 support,
troubleshooting production issues, root cause analysis)
●​ Ticket handling and operational support (Jira/Service Desk,
request validation, escalation to responsible teams)

DevOps Engineer — Aristeem APR 2024 — MAY 2025
●​ Building a cloud architecture (AWS Stack, bare-metal clusters)
●​ Implementation of CI/CD (Gitlab, GitHub)
●​ CI/CD optimizing (cost reducing, time to market process acceleration)
●​ Virtualization, container management (docker, docker compose, k8s)
●​ Monitoring (Zabbix, Prometheus, Grafana, ELK, Graylog, AWS
CloudWatch, Nagios, Filebeat)
●​ Deep customization of operating systems. (Linux, Windows Image
optimizing for production virtualization based on KVM)
●​ Working with DB (SQL, non-SQL)
●​ Automation of virtualization processes (ansible, basic python)
●​ HL storage system architecting (ceph, soft/hardware raids)
●​ Data center deployment (order management, coop with suppliers)
●​ Architecture of HL/HA system operation
●​ CDN implementation (bare-metal, cloudfront)

SysOps/DevOps Engineer — Dataweb Global Group JUL 2022 — AUG 2024
●​ Deep audit of Linux-based servers (Ubuntu, Debian, FreeBSD, etc)
●​ Configuration of the company mail servers (exim, dovecot)
●​ Optimization and configuration of high-load servers
●​ Administration of CDN services
●​ Network administration and troubleshooting (all OSI model layers)
●​ Linux/Unix troubleshooting, tuning (core configuring, etc.)
●​ Search and implementation of new server monitoring algorithms
●​ Load balancing, protection against DDoS attacks, and hacking activity
●​ Database configuring, tuning (MySQL, MongoDB)
●​ Provisioning DAAS services (K8s, Docker, Swarm, ELK)
●​ Script automation development (Python, Bash/Shell)

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SysOps Engineer — Virtual Systems JUN 2021 — JUL 2022
●​ Designed and implemented network configurations, ensuring
connectivity between routers and switches.
●​ Troubleshot OS, web servers, cloud, and network-related issues.
●​ Set up and installed various server machines (iLO, Quanta, Dell, etc.).
●​ Cluster administration (Proxmox and VMware based)
●​ Monitored network and server performance.
●​ Managed DB administration (backuping, optimization)
●​ Automated backups and snapshot systems.
●​ Configured security systems for DDOS detection and filtering.
●​ Server deploying from commutation stage, deploy automatization
●​ Configured Nginx and Apache web servers

Technical/Network Engineer (part-time) — WorkNest (now GlobalDev Tech) DEC 2020 — SEP 2023
●​ Managed the establishment and maintenance of software licensing for
all employees.
●​ Configured and installed server and personal operating systems,
including Windows, Linux, and Unix-like systems.
●​ Administered backup servers, including RAID configuration.
●​ Oversaw licensing servers from corporate software providers.
●​ Conducted inventory, tracking, setup, and hardware configuration of
office equipment.
●​ Implemented primary and secondary security measures (Firewalling,
2FA, etc.).
●​ Prepared the company for ISO 27001 certification.

Additional
●​ English B2
●​ OSI, AWS, Ops Certified Engineer
●​ Flexibility in schedule

Education
NTU of Ukraine ‘I. Sikorsky KPI’ — Graduate in 2023, Kiev 2019 — 2023
APEPS department, IATE (know as TEF) - Computer science

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