Nikolai Leshchev Email & Phone Number

Tbilisi, Georgia

- Managing Kubernetes clusters (10 high-load on-premise Kubernetes clusters: 1000 bare-metal nodes, 30k pods, 200 Gbit/s, 1 million QPS)- Debugging issues with Kubernetes nodes and workload- Automation Kubernetes nodes configuration by Puppet

Saint Petersburg, St Petersburg City, Russia

- Administering a Nomad cluster and facilitating the migration of services to it.- Orchestrating the development of infrastructure surrounding Nomad, incorporating Vault, Consul, and Haproxy.- Producing numerous Chef cookbooks and Terraform modules.- Contributing to knowledge sharing through demonstrations and webinars.- Successfully launched a Vault cluster within the infrastructure.- Pioneered the creation of a novel autoinstall service and a project for generating images based on Packer and Ansible.- Designed and developed a Ruby library for Chef, enabling the secure retrieval and decryption of encrypted secrets.- Established a new repository for Gitlab CI pipelines and related libraries.- Enhanced the logging process by integrating the Elastic Stack into our infrastructure.- Improved the alerting process by implementing Grafana OnCall within our infrastructure.- Attained certifications from HashiCorp.I engaged with the Nomad orchestrator and embarked on a path of expanded development. This marked the initiation of my journey towards becoming a DevOps engineer or a Site Reliability Engineer (SRE).

St Petersburg City, Russia

- Managing backend services written in Python.- Administering an infrastructure hosted on the OpenStack Cloud platform.- Crafting Chef cookbooks and Terraform modules to streamline infrastructure provisioning.- Establishing GitLab CI pipelines for efficient continuous integration.- Responding to infrastructure emergencies and mitigating incidents effectively.- Developing and implementing Gitlab Runner to execute jobs within libvirt VM instances.- Gaining expertise in Chef, Terraform, and GitLab CI.I delved deeper into our project's infrastructure, acquainting myself with configuration and infrastructure management systems.

St Petersburg City, Russia

- Maintaining the PXE boot process for bare metal servers.- Debugging and configuring DHCP, TFTP, Nginx, Samba, and other critical services.- Developing and maintaining a lightweight Linux distribution based on ArchLinux for service deployment.- Creating Bash and Python scripts to automate hardware testing and various operational tasks.I initiated my career in system administration at this juncture and have since cultivated a comprehensive set of general system administration skills.

St Petersburg City, Russia

- Serving as a second-tier technical support specialist and providing remote assistance.- Expertise in the installation of network equipment and servers onto server racks.- Proficient in orchestrating cross connections between various kind of equipment.- Demonstrated ability to execute fundamental installations, debugging, and configurations for Linux and Windows systems, as well as network equipment.It was an employment opportunity I pursued while attending university. During this period, I familiarized myself with fundamental tools and technologies.