Thursday, November 21, 2024

[English] Example

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Security Experience

I really admire the Japanese working style, so i hope to have the opportunity to work at your company. Although my current English proficiency may not be strong, I believe that with the right environment for development, i can improve it in the future.

Security Experience

– My projects are mostly in Vietnam.
– All of my projects are entirely in Vietnam.

Security Experience

I haven’t had the opportunity to engage with international projects, so I haven’t had an environment to use the English language. Thank you for providing me the opportunity to speak during today’s interview session.

Security Experience

– Ceph is a type of distributed storage.
– The data will be evenly distributed across OSDs, with each OSD corresponding to one physical drive.
– I can manage storage capacities of up to several hundred terabytes.

Security Experience

Main tasks in company.

– Operating approximately 200 physical servers and around 1000 virtual servers that are providing services to customers such as Cloud Server, Hosting, Email, DNS,…
– Deploying, operating, analyzing and promptly resolving issues in the IT systems to ensure continuous, stable, secure, and efficient operation of the services.
– Researching and applying new solutions to optimize management, technology development and to monitor the system.
– Designing, deploying, and maintaining virtualization systems including VMware vSphere, Virtuozzo, Proxmox, Openstask and Container systems such as Kubernetes, Docker.
– Researching, designing, deploying and maintaining the MatBaoCA digital signature system and MIFI electronic invoice system.
– Deploy centralized log analysis systems to monitor the company’s running services and customers, such as ELK, Zabbix, Prometheus, Grafana,…
– Building and developing automated CI/CD systems for in-house systems.
Security Experience

The following are some of the experiences I have gained during my learning and working process.

– Linux/Windows: Good knowledge to operate Linux/Windows servers, for example tools such as Apache, Nginx, HA Proxy, Pacemaker, Corosync, Domain Controler, File Server,…
– Cloud: Understanding and basic operation of Amazon Web Services cloud services such as VPC, EC2, EKS, … Using Terraform, Ansible, Packer tools to automate infrastructure and Amazon Web Services services.
– Virtualization: Strong knowledge and experience in deploying Virtuozzo, KVM, VMware, Openstack, Proxmox and HyperV virtualization solutions. Using virtual machine management tools such as Virtualizor, SolusVM, Cockpit Web Console,…
– Virtual Desktop Infrastructure: Experience deploying VDI systems on Proxmox, with the ability to utilize both GPU Passthrough and vGPU technologies using NVIDIA Tesla graphics cards. This not only allows virtual machines to directly harness the power of the GPU through Passthrough but also optimizes the management and sharing of graphics resources through vGPU.
– Containerization: Knowledge and experience in deploying Kubernetes. Ability to use Dockerfile, Docker Compose, Docker Swarm, Rancher,…
– Automation: Experience building CI/CD automation systems such as Github, Gitlab, Jenkins, etc. Good knowledge of configuration management tools such as Ansible, Shell scripts, Go Lang and Python.
– Infrastructure as code: Experience with automation tools such as Packer, Terraform, Vagrant, Python, Bash Script, Go Lang.
– VoIP: Strong skills in Asterisk, Cisco, CIC, Goautodial, FXO Device, and GMS Device. Capable of writing APIs to interact with the Asterisk system, for example, creating scripts, dial plans, queues, reports, etc.
– Security: Experience in deploying firewalls such as Fortigate, OPNSense, Pfsense,… etc. Use tools such as Tcpdump and Wireshark to analyze packets. Have experience deploying distributed security systems, open-source IDS, IPS like CrowdSec.
– Network: Skills in designing, deploying and solving problems related to Routing, Switching (LAN, WAN, VPN, Tunnel, MPLS, Routing, StackWise,…). Capable of deploying SDN (Software-Defined Networking) systems using FRRouting, Linux Bridge, Openvswitch.
– Storage: Capacity to deploy and manage storage systems up to hundreds of terabytes. Strong skills in storage technologies (Ceph, Virtuozzo, SAN, NAS). Effectively utilize hardware and software RAID solutions such as ZFS in Linux.
– Monitor: Experience in deploying monitoring systems such as Prometheus, Cacti, PRTG, Zabbix and Grafana. Deploying systems to collect and monitor network traffic such as Netflow, sFlow,…
– Logs Analysis: Deploying log analysis systems such as ELK, Graylog. Using tools to collect and analyze traffic such as sFlowTrend, sFlow-RT, Ntop,…
– Databases: Basic database knowledge of MySQL, MariaDB, MSSQL, PostgreSQL, Redis, MongoDB. Effectively utilize various types of databases to support API development and system automation processes.
– Programming languages: Can use programming languages such as Python, Bash Script, JavaScript, GoLang, HTML, and CSS. Capable of writing APIs and Frontend using the Flask module in Python.
– Hardware: Possess knowledge in using servers from HP, Dell, Supermicro, as well as encryption devices like HSM, storage devices such as RAID cards, SAN, DAS, NAS and network devices such as Cisco, Nexus, Mirotik, Fortigate,…

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