Leonardus Kristaris Sastra

Leonardus Kristaris Sastra

IT Support Technician

Followers of Leonardus Kristaris Sastra307 followers
location of Leonardus Kristaris SastraMalang, East Java, Indonesia

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  • Timeline

  • About me

    Simple as Docker Container

  • Education

    • STMIK PPKIA Pradnya Paramita Malang

      2015 - 2019
      Gelar Sarjana Information Technology
  • Experience

    • Maestro Computer Jombang

      Oct 2013 - Dec 2013
      IT Support Technician

      Intern for IT support which helps repair printer, simple networking

    • STMIK PPKIA Pradnya Paramita Malang

      Sept 2017 - Jun 2019

      Assistan Lecture for algorithmic & programming courses

      • Student

        Aug 2015 - Jun 2019
      • Assistant Lecturer

        Sept 2017 - Dec 2017
    • Telkomsel

      Oct 2017 - Dec 2017
      Marketing Internship

      A member from Telkomsel Apprentice Program 2017 Batch 2

    • Boer Technology (Btech)

      Aug 2018 - Oct 2018
      Engineer Internship

      internship students who learn the basics of Linux, system administrators, and cloud computing in particular:- OpenStack- Docker- Ceph- Jenkins- Nextcloud

    • PT. Infinys System Indonesia

      Jun 2019 - Oct 2020
      Technical Support Staff
    • Biznet Gio Cloud (PT Biznet Gio Nusantara)

      Oct 2020 - now

      As a System Operations Engineer, I am responsible for managing the weekly rolling on-call schedule, ensuring system reliability, and supporting critical infrastructure. I work in a hybrid environment, balancing both remote (WFH) and in-office (WFO) collaboration to maintain seamless operations.We responsibilities to monitoring and maintaining system performance through SLO, SLA, and SLI metrics, with reviews conducted on a weekly to annual basis. I also plan and execute routine maintenance for management, production, staging, and customer infrastructures. Additionally, System Operatons will handling incident response efforts, coordinating with cross-functional teams to address system outages and large-scale disruptions efficiently.A standout achievement in this role was this years we successfully navigating and mitigating the Biznet Data Breach in 2024. Our team carried out a comprehensive system evaluation, implementing robust improvements across software, infrastructure, and employee management to enhance security and prevent future incidents. This experience reinforced our ability to maintain high standards in system operations and crisis management.Stack Tech:- Openstack RHOSP (Nova-Neutron-Glance-Keystone-HAProxy-Heat-Octavia-Cinder)- VMWare (vCenter-vSphere-ESXi-vCloud Director-NSX Edge)- Proxmox (VE-BS-MG)- BMaaS (NEO Metal)- Container (Docker-Podman-Kubernetes)- Automation (RackN-GitLab-Rundeck)- Monitorng (Proxmox-Zabbix-OpsGenie)- Ceph- Nimble- Cloudian S3- ZFS- DB (SQL-MySQL-MariaDB-PostgreSQL)- Router / VPN (PFSense-OPNSense-IPTables-Softether-VyOS)- DNS (Cloudflare-KNOT-PowerDNS-Windows DNS)- Active Directory/LDAP- Varnish Enterprise- WHM/cPanel- Plesk- Suse- RHEL (Rocky-Alma-Centos-RedHat)- Ubuntu- Debian- Server (HPE-Dell-Lenovo)- Console (iLO-iDRAC-xClarity)- Scripting (Bash) Show less As Product Operation Engineer I'm provide Cloud technical solution & Handling Esalation Problem from L1 by Ticket or Direct communication.Provide migration support to:- Email- Website- Database- Control Panel- DNS- Virtualization ( VMWare - Openstack / VMWare - VMWare) Experienced using monitoring tools like Prometheus & Grafana.Experienced managing SSG like Jekyll and integrate it to CI/CD with GitLabExperienced using bash scripting.And working with love ❤ Show less Provide technical cloud solutions to customers by Email, tickets, and live chat.Provide migration support to:- Email- Website- Database- Control Panel- DNS- Virtualization ( VMWare - Openstack ) Provide one time manage support:- Creating new instance or VM on Openstack or VMWare- Upgrading services on servers- Deployment framework web application or CMS- Upgrading resources on servers like: Memory, CPU, Disk- Partitioning and mounting volumes to the servers- Create Load Balancing HA solutions on website/databasesExperienced using monitoring tools like Prometheus & Grafana.Experienced managing SSG like Jekyll and integrate it to CI/CD with GitLabExperienced using bash scripting.And working with love ❤ Show less

      • System Operations Engineer

        Apr 2024 - now
      • Product Operation Engineer

        Apr 2022 - Apr 2024
      • Product Operations Support

        Oct 2020 - Apr 2022
    • BlankOn Linux

      Nov 2020 - Jul 2021
      Quality Assurance Tester

      Bertanggung jawab memantau tiket berisi bug / kutu dan memastikan tiket ditutup serta melakukan pengetesan terhadap setiap aspek dari BlankOn agar hasil akhirnya dapat dijamin kualitasnya.Tim ini merupakan Kontrol Kualitas dari distribusi BlankOn. Setiap jahitan harus diuji oleh tim Jaminan Kualitas.

  • Licenses & Certifications

  • Volunteer Experience

    • Translator

      Issued by LibreOffice on Jan 2019
      LibreOfficeAssociated with Leonardus Kristaris Sastra
    • Speaker

      Issued by Komunitas GNU/Linux Malang on Oct 2018
      Komunitas GNU/Linux MalangAssociated with Leonardus Kristaris Sastra
    • Coordinator

      Issued by Komunitas GNU/Linux Malang on Oct 2018
      Komunitas GNU/Linux MalangAssociated with Leonardus Kristaris Sastra
    • Assistant Instructor

      Issued by DOT Indonesia on Mar 2019
      DOT IndonesiaAssociated with Leonardus Kristaris Sastra