Oleksii – Linux, AWS, Microsoft Azure

Server-side solution and in-place scanners to simplify accounting for the turnover of goods between warehouses, retail outlets, etc.

• Transferred a Python application from Docker Compose to Kubernetes, utilizing Kubernetes manifests for deployment.
• Crafted POC infrastructure utilizing k3s and Dockerized PostgreSQL to fit in one node. Provided replication runbook. Later, the environment became a cost-effective sandbox for QA and Dev teams.
• Designed a cost-effective production environment infrastructure with Linode-managed resources. Leveraged Terraform for efficient deployment.
• Developed time-saving automation to update integrations with GitHub.

IoT product to optimize energy management and resource consumption for metallurgy and mining facilities. The customer is a global energy company.

• Maintained container-based ecosystem, optimized it: better leveraging of AWS-based infrastructure, initialized big documentation updates, revamped IaC with Cloudformation, and improved CI/CD stack by implementing Jenkins self-recovery.
• Automated time-consuming maintenance routines, such as Kernel Live Patching for Amazon Linux 2+, AMI management, and safe auto-updates. This efficiency freed up time for more critical work.
• Crafted a cost-effective alerting system using cronjobs, Bash, and MS Teams webhooks, freeing up resources to design a new Kubernetes-based stack and a modern monitoring system and planning the migration to those.

A fintech project for the Americas region. The product should simplify document flow between a customer and a bank clerk and process through a web UI and a mobile app asynchronously (for a bank and a customer).

• Contributed to the design and built infrastructure from the ground up with Terraform, harnessing AWS RDS, EKS, S3, Lambdas, ECR, EC2, also MongoDB Atlas
• Engaged in New Relic integration for infrastructure monitoring. Monitored Node.js apps, set up CI/CD (GitLab, ArgoCD), and transformed k8s manifests into Helm charts. Designed backup\restoration solutions.
• Coordinated a team of four part-time engineers specializing in cloud infrastructure and DevOps

A casual games development studio and related services provider with the main office in Thailand.

• Contributed to the overhaul of infrastructure across AWS, on-premises servers, Digital Ocean, Docker Compose, and Kubernetes (EKS and self-hosted).
• Led the migration of active projects from Bitbucket to GitLab and from Circle CI to GitLab CI. Played a key part in building a unified CI/CD flow based on GitLab CI, ArgoCD
• Involved in updating and developing a new monitoring system. Shared on-call duties to maintain system reliability
• Refined documentation and runbooks for better operational clarity.

The platform for virtual labs and science simulations. The company provides schools and universities with tools to develop virtual working labs to interact with and without VR helmets and other accessories, and integrate those labs with learning management systems. Virtual working labs make learning much safer and affordable all over the world

• Played a key role in the maintenance and optimization of a multi-cloud infrastructure utilizing AKS and EKS, ensuring efficient service distribution and functionality across cloud environments
• Collaborated closely with development teams to facilitate multi-environment deployments, including the implementation of a canary deployment strategy, optimizing the app containerization
• Provided comprehensive support to developers for complex issues such as DB migrations, data updates and rollbacks, connecting to services for live debugging and others, which collectively fostered a more efficient development cycle

Leading DNS services and hosting provider.

• Led the optimization of processes and procedures related to the cooperation of TechOps-on-shifts engineers and our colleagues from Customer Support departments
• Developed educational materials and runbooks for Technical Support teams
• Built semi-automation tools to simplify disaster aid (we were cut off from DC dew to a desert fire)