Leonardus Kristaris Sastra

Experience

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  Maestro Computer Jombang

  Oct 2013 - Dec 2013

  IT Support Technician

  Intern for IT support which helps repair printer, simple networking

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  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
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  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
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  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
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  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.