Author Image

Hi, I am Volodymyr

Volodymyr Zavalskyi

DevOps Engineer at WSC Sports

Quality-driven DevOps / Platform Engineer with 6+ years operating cloud infrastructure on Azure and AWS. I run multi-cloud Kubernetes at fleet scale with GitOps (ArgoCD), CI/CD, Terraform, and end-to-end secrets management, supporting live, latency-sensitive sports media. An evidence-first troubleshooter who turns incidents into durable, automated systems, with a focus on reliability, scalability, and cost efficiency.

CKAD: Certified Kubernetes Application Developer
AWS Certified SysOps Administrator – Associate
HashiCorp Certified: Vault Operations Professional

Skills

Kubernetes
Kubernetes

Operating multi-cloud Kubernetes at fleet scale across AKS, EKS and Alibaba ACK, including cluster upgrades and node autoscaling.

ArgoCD
ArgoCD

GitOps delivery at scale with ArgoCD, managing applications across a multi-cluster fleet using ApplicationSets.

Helm
Helm

Packaging and releasing Kubernetes workloads with Helm charts.

Docker
Docker

Building and running containerized workloads, from local images through to registry-backed delivery.

KEDA
KEDA

Event-driven autoscaling for queue-based workloads, scaling on message backlog rather than CPU.

AWS
AWS

Designing and managing scalable cloud infrastructure on AWS - EKS, IAM, S3, Secrets Manager and CloudFront.

Microsoft Azure
Microsoft Azure

Cloud infrastructure on Azure - AKS, networking, Front Door and Entra ID.

Jenkins
Jenkins

Developed and maintained CI/CD pipelines using Jenkins.

GitLab CI/CD
GitLab CI/CD

Automation of deployment pipelines using GitLab CI/CD.

GitHub Actions
GitHub Actions

Automation of workflows using GitHub Actions.

Terraform
Terraform

Infrastructure as code with Terraform, including in-house module development and environment-gated plan/apply automation.

Ansible
Ansible

Configuration management and server provisioning with Ansible playbooks.

Prometheus
Prometheus

Monitoring infrastructure performance with Prometheus.

Grafana
Grafana

Visualization of monitoring metrics using Grafana.

Datadog
Datadog

Cloud monitoring and performance analysis with Datadog.

OpenTelemetry
OpenTelemetry

Instrumentation and collector pipelines for traces and metrics, with observability managed as code.

Python
Python

Scripting and application development, primarily for automation and data transformation tasks.

Networking
Networking

Expertise in TCP/IP, HTTP stack, VPN, SSH, DNS, and Load Balancer management (L3, L7). Experienced in VPC management.

Linux
Linux

Proficient in Linux system administration and shell scripting for automation.

HashiCorp Vault
HashiCorp Vault

Secrets management and PKI with HashiCorp Vault. Vault Operations Professional certified.

PostgreSQL
PostgreSQL

Database management and data migration with PostgreSQL.

Experiences

1
WSC Sports

Sep 2025 - Present

Warsaw, Poland (Hybrid)

WSC Sports is an AI-powered sports video company that automatically creates and distributes personalized highlights for major leagues and broadcasters worldwide.

DevOps Engineer

Sep 2025 - Present

Responsibilities:
  • Platform/DevOps engineer on the team operating WSC Sports’ multi-cloud Kubernetes fleet behind live, latency-sensitive sports video for major leagues and broadcasters.
  • Operate a fleet-scale, multi-cloud Kubernetes estate (Azure AKS, AWS EKS, Alibaba Cloud) across multiple regions, running a large ArgoCD-managed application platform.
  • Infrastructure as code in Terraform with an extensive in-house module library - AKS, networking, databases, CDN, and GitHub org config.
  • GitOps delivery with ArgoCD and KEDA event-driven autoscaling for queue-based media workloads.
  • End-to-end secrets management.
  • 24/7 on-call - production incident response, reliability, and AI-assisted troubleshooting tooling.
SoftServe

Oct 2020 - Sep 2025

Poland

SoftServe is a global IT consulting and digital services provider with more than 10,000 employees.

Senior DevOps Engineer

Oct 2023 - Sep 2025

Responsibilities:
  • Progressed from Junior to Senior DevOps Engineer, maintaining CI/CD infrastructure for 6+ teams including tool upgrades and security patching.
  • Designed, implemented, and managed scalable infrastructure on AWS, Azure, and on-premise.
  • Developed and maintained CI/CD pipelines and infrastructure (Jenkins, GitLab CI, GitHub Actions, JFrog, SonarQube, HashiCorp Vault, Kubernetes, Docker), including shared pipelines and dedicated runners.
  • Administered Kubernetes environments (AKS, multiple on-prem DCs); migrated applications from legacy Docker Swarm to Kubernetes with Helm.
  • Implemented infrastructure as code with Terraform and AWS CloudFormation.
  • Executed zero/minimal-downtime data migrations for GitLab, HashiCorp Vault, and Kafka - saving up to $20k/month on data transfer for the Kafka migration.
  • Designed a Vault Disaster Recovery architecture on AWS and FIPS-compliant infrastructure in AWS GovCloud with secure pipelines; led migration from Vault to AWS Secrets Manager.
  • Worked as a Python application developer focused on data load and transformation on AWS (S3, Neptune DB); mentored and trained team members.
Middle DevOps Engineer

Aug 2022 - Oct 2023

Junior DevOps Engineer

Oct 2020 - Aug 2022

2

Featured Posts

Hero Image
HTTP/3 in Practice: From SPDY to QUIC on My Home Router

I turned on HTTP/3 for a CloudFront distribution, saw the load times improve, and then did what I usually do when something works without me understanding why: I went looking for the packets. This post has three parts. First, how HTTP got here — because HTTP/3 makes very little sense without the twenty years of workarounds that preceded it. Second, the theory, kept short. Third, the practical part: enabling it on a CDN, then capturing real QUIC traffic on my OpenWrt router with tcpdump and reading what comes back.

Monday, July 27, 2026 | 12 minutes Read
Hero Image
GitHub Actions Basics

GitHub Actions is GitHub’s built-in automation platform. It lets you build, test, and deploy your code right from GitHub. Key Concepts Workflow: Automated process defined in a YAML file inside .github/workflows/. Event: Trigger that starts a workflow, such as a push, pull request, or schedule. Job: A set of steps executed on the same runner. Step: An individual task in a job that can run commands or actions. Action: Reusable extension that performs a specific task. Actions can come from the marketplace or your repository. Runner: The server that executes your jobs. GitHub-hosted runners cover common environments, or you can use self-hosted runners. Example Workflow Create a file named .github/workflows/ci.yml in your repository:

Thursday, May 30, 2024 | 2 minutes Read
Hero Image
Kafka Basics: Theory and Python Examples

Apache Kafka is a distributed platform for handling real‑time event streams. It provides three main capabilities: Publish and subscribe to streams of events. Store those streams durably and reliably for as long as needed. Process streams of events as they occur or later. Events, Producers, and Consumers An event (or record/message) captures that “something happened” in your system. Client applications that write events are called producers, while those that read events are consumers.

Tuesday, August 19, 2025 | 4 minutes Read

Recent Posts

Hero Image
Git Worktree: One Repo, Every Branch, No Stashing

You are halfway through a refactor. Nothing compiles. Someone reports production is broken and needs a one-line fix on main. So you git stash, switch branch, fix, switch back, git stash pop, and spend the next ten minutes working out which of your changes came back and which were already there. Or you keep a second clone of the repo, and now you maintain two sets of hooks, two .env files, two IDE indexes, and 4 GB of duplicated history.

Tuesday, July 28, 2026 | 10 minutes Read
Hero Image
HTTP/3 in Practice: From SPDY to QUIC on My Home Router

I turned on HTTP/3 for a CloudFront distribution, saw the load times improve, and then did what I usually do when something works without me understanding why: I went looking for the packets. This post has three parts. First, how HTTP got here — because HTTP/3 makes very little sense without the twenty years of workarounds that preceded it. Second, the theory, kept short. Third, the practical part: enabling it on a CDN, then capturing real QUIC traffic on my OpenWrt router with tcpdump and reading what comes back.

Monday, July 27, 2026 | 12 minutes Read
Hero Image
Mutual TLS: What It Actually Proves

Every HTTPS connection you make proves something: that the server is who it claims to be. Almost none of them prove the reverse. The server has no idea who you are until you send it a password, a token, or a cookie — a secret that has to be created, stored, transmitted and rotated, and that anyone who steals it can replay. Mutual TLS moves that proof into the connection itself. Both sides present a certificate, both sides verify the other, and the caller’s identity is established before a single byte of your application protocol is exchanged.

Tuesday, June 9, 2026 | 16 minutes Read

Accomplishments

CKAD: Certified Kubernetes Application Developer
The Linux Foundation April 2024 - April 2026

This certification focuses on Kubernetes application development, covering topics such as Amazon EKS, Azure Kubernetes Service (AKS), and Kubernetes deployment and management.

View Certificate
HashiCorp Certified: Vault Operations Professional
HashiCorp July 2025 - July 2027

This certification validates skills in managing HashiCorp Vault, focusing on DevOps practices and secure secrets management.

View Certificate
AWS Certified SysOps Administrator – Associate
Amazon Web Services (AWS) January 2023 - January 2026

This certification covers operational management in AWS, including CI/CD, AWS CloudFormation, Kubernetes, and other AWS services like S3, CloudWatch, and troubleshooting.

View Certificate
AWS Certified Cloud Practitioner
Amazon Web Services (AWS) June 2022 - June 2025

This foundational certification demonstrates a basic understanding of AWS services, cloud computing, and core AWS services.

View Certificate