KARABEK ABIY UULU

Seasoned DevOps Engineer with over 7 years of experience specializing in automating, configuring, and optimizing systems.

Well versed in a suite of technologies including Linux/RHEL/Ubuntu, Docker, Kubernetes, AWS, Terraform.

With a master's degree and several certifications, possesses a solid educational foundation to support complex IT infrastructures as well as career goals.

● Cloud: AWS: EC2, S3, VPC, ELB, EBS, EFS, IAM, Route53, Autoscale, Cloudwatch, CloudFormation, Elasticsearch,...

● Virtualization: VMware 6.5, ESXI, XEN, KVM, VirtualBox,...

● Package management: Installation, patching, compilation using rpm/yum

● OS: Linux RHEL/CentOS/Ubuntu, Microsoft Windows.

● Automation: Kickstart, Ansible, Bash, Python (beginner)

● Servers: Apache,Nginx,DNS,FTP,DHCP,NFS,MySQL,MariaDB,LDAP,SMTP,SSH,HTTP

● Monitoring tools: Nagios, Centreon, Kibana, Grafana

● Security: AWS IAM, NACLs, SG; LDAP; AD; SELinux; Firewalld; Keycloak, Keeper.

● Disk management: LVM, RAID, SAN, NAS

● DevOps: CI/CD pipeline - Jenkins, Maven, Selenium, GitHub, Ansible, AWS CloudFormation, AWS CodePipeline

● Ticketing tools: Nagios, Jira, Service-Now, PagerDuty.

● Troubleshooting: ping, top, df, du, lsof, dmesg, netstat, ss, ssh, free, traceroute, fsck, dracut, xfs_repair, curl, sar...

 

●      AWS Certified Developer Associate (AWS-ADEV-9965)

●      Certified Kubernetes Application Developer - Udemy course completion, 02/2023

●      Terraform Associate Certification: HashiCorp Certified - KodeKloud course completion, 09/2023

 

●      2008-2010 Robert Morris University, Chicago IL | MBA

 

 

       DevOps Coaching: Linux/RHEL, AWS, Terraform, Ansible, Docker, Kubernetes, Jenkins, GitHub Actions.

       Configuring webhooks to integrate websites with AWS Lambda Function (Node.js), API Gateway, Slack.

       Implementing full-stack development using: HTML, CSS, JS, LAMP, MEAN applications.

       Deploying three-tiered architecture on AWS with Terraform, Kubernetes,GitHub repos.

 

       Demonstrated success in implementing CI/CD pipelines using: Git, GitHub Actions, Spacelift, Kubernetes, Argo CD, Helm, Lens, Terraform, Ansible that increased deployment frequency by 20%.

       Containerized home-grown applications utilizing Dockerfile to define container image, used Ubuntu Images for Linux containers, worked with Helm templates, deployed apps from Infrastructure repo.

       Troubleshooted alerted tickets via PagerDuty, supported production systems outside of regular working hours, volunteered for over 100 hours of 24/7 on-call duty in the past year to promptly address and resolve issues for Kubernetes pods in multi-cluster environment.

       Maintained and monitored processes/environment throughout their entire lifecycle using Zabbix, successfully achieving a 99.8% uptime rate for critical systems over the past year.

This rigorous monitoring led to the early detection and resolution of over 100 potential issues before they impacted system performance.

       Successfully built (MSAs) for customers, strictly adhering to the adopted SLA, SLO, and SLI standards, leading to the onboarding of 10+ new high-value clients.

       Effectively resolved, validated over 10 complex SQL queries against SQL Server, imported data from Windows Active Directory (AD), enhancing system performance and user accessibility.

       Worked closely (Evening hours) with development and security teams to coordinate and schedule code updates, patches using Terraform, K8S, AWS, ensuring 99.9% uptime and compliance with security protocols.

Created Golden Images on AWS.

       Communicated effectively with stakeholders about upcoming updates, potential impacts and expected outcomes, leading to a 90% satisfaction rate in stakeholder communication.

       Tested, configured, deployed, managed: CrushFTP, Exolution, Navicat applications.

       Mentored 2 new members of infrastructure team, resulting in a 20% improvement in team efficiency.

 

 

• Managed and maintained around 800 physical, 3000 virtual Linux RHEL/CentOS servers for dedicated and collocation customers.
• Installed, updated, patched LAMP (Linux, Apache, MySQL, PHP) stack using PXE boot/Kickstart, YUM, RPM.
• Successfully validated and resolved a wide range of network/system issues, addressing over 1000 incidents related to DNS, DHCP, FTP, SFTP, TCP/IP, NFS, LDAP, SSH.

My efforts in troubleshooting and resolving these issues led to a 25% reduction in network-related downtime and a 15% improvement in data transfer efficiency.

Additionally, my optimization of LDAP and SSH configurations resulted in a 15% enhancement in system authentication processes and a 10% increase in secure data transmission reliability.

• Troubleshooted various issues: memory, disk, CPU, application, remote access, Firewall, SELinux, PAM files, LVM with help of iDRAC, iLO which resulted in a 15% reduction in hardware failure rates.
• Architected secure AWS resources dedicated clients by deploying: EC2, S3, Internet Gateways, Security Groups, NACLs, Public & Private Networks, Routing Tables, Route 53.
• Supported storage, networking teams to manage HA/FT Linux clusters in SAN environment.
• Actively participated in a rotating on-call schedule for immediate response, covering over 100 on-call shifts throughout my career in data center.

During these shifts, I efficiently responded to and resolved an average of 5 critical incidents per shift, totaling over 300 incident resolutions.