Aleksy Zaleński, Networks Developer in Kraków, Poland
Aleksy Zaleński

Networks Developer in Kraków, Poland

Member since August 7, 2019
Aleksy is a DevOps engineer with a solid technical background. He's worked at the world's biggest CDN company, Akamai, as a solutions architect, preparing customers for prestigious events such as the World Cup and the Olympics. Aleksy is currently working as a DevOps engineer at a software company, where he's responsible for the cloud infrastructure, CI/CD pipelines, automation, and resolving various performance and scalability issues.
Aleksy is now available for hire


  • Architech
    Amazon Web Services (AWS), Azure DevOps, Serverless, DevOps, Azure, Cloud...
  • Toptal Client
    Amazon Web Services (AWS), Kubernetes, CI/CD Pipelines, AWS DevOps, Ansible...
  • Callpage
    Amazon Web Services (AWS), Bash, Kubernetes, Terraform, Docker, Linux...



Kraków, Poland



Preferred Environment


The most amazing...

...project I've worked on is the migration of an entire company infrastructure to Kubernetes.


  • DevOps Engineer

    2020 - PRESENT
    • Created and maintained architecture and resources for a fully serverless application in Azure.
    • Developed full E2E CI/CD pipelines for creating the infrastructure and deploying the application code to a Kubernetes cluster deployed in AWS.
    • Mitigated customer application performance issues.
    Technologies: Amazon Web Services (AWS), Azure DevOps, Serverless, DevOps, Azure, Cloud, CI/CD Pipelines
  • DevOps Engineer

    2019 - PRESENT
    Toptal Client
    • Created and maintained the customer infrastructure using Amazon EKS (Kubernetes) and GitLab CI/CD. Since it's a healthcare company, it requires HIPAA compliance. Terraform was used as IaC.
    • Developed and maintained the customer on-premise infrastructure using Kubernetes on a single-node deployment. The configuration was done using Ansible.
    • Created and maintained multiple Drupal and WordPress sites using many different EC2 instances as well as Docker containers and ECS. The configuration of EC2 instances was done using Terraform and Ansible.
    Technologies: Amazon Web Services (AWS), Kubernetes, CI/CD Pipelines, AWS DevOps, Ansible, GitLab, Amazon ECS (Amazon Elastic Container Service), Docker, Terraform
  • DevOps Engineer

    2018 - 2020
    • Created and maintained the company's microservices infrastructure deployed using Kops, Kubernetes, and AWS.
    • Developed CI/CD pipelines for deploying code to AWS.
    • Aided developers with the implementation and deployment of code into the infrastructure.
    • Solved different performance and scalability challenges.
    • Migrated entire customer infrastructure to Kubernetes.
    Technologies: Amazon Web Services (AWS), Bash, Kubernetes, Terraform, Docker, Linux, Laravel, Kubernetes Operations (Kops)
  • Solutions Architect

    2015 - 2018
    Akamai Technologies, Inc.
    • Provided consultancy for customers as the technical expert.
    • Owned the technical components of a customer integration project, including the configuration, debugging, documentation, testing, and go-live support.
    • Prepared configurations for big events such as the Olympics and the Euro and World Cups.
    • Identified technical risks and provided mitigation strategies.
    • Developed automation scripts that helped the entire team with everyday tasks.
    Technologies: JavaScript, Python, Streaming, HTTP, DNS, Content Delivery Networks (CDN)


  • Migration of a Company's Infrastructure to Kubernetes

    I was responsible for migrating the entire company infrastructure from bare cloud instances to a Kubernetes cluster. This involved creating the CI/CD pipelines, with self-contained Docker containers as an artifact, creating Kubernetes clusters for all three environments, deploying monitoring and logging, and ensuring the application is both scalable and resilient to failures.

  • Migration of an Entire Customer Infrastructure to Terraform

    I was responsible for migrating the entire customer AWS infrastructure, which was created manually using Portal, to an IaC in Terraform. The infrastructure consisted of many different AWS services (VPC, EC2, RDS, ElastiCache, IAM, etc.), so we needed to build and utilize many different Terraform modules.

  • Migration of an Infrastructure from On-premise to Azure

    As a DevOps Engineer, I was involved in the migration of a big company's on-premise infrastructure to Azure. We created Azure landing zones using Terraform Cloud and Cloud Adoption Framework best practices.

  • Preparing the Largest Streaming Companies for Big Events

    I was working with the biggest streaming companies in the world and preparing them for events such as the Olympics, the World Cup, and the Euro Cup. This required validating and tweaking their entire streaming setup and making sure it could handle the load of millions of users connected at once, with minimum latency and re-buffering.


  • Tools

    Git, Terraform, GitLab, Grafana, Helm, Jenkins, Ansible, Istio, Amazon ECS (Amazon Elastic Container Service)
  • Paradigms

    DevOps, Azure DevOps, Continuous Delivery (CD), Continuous Integration (CI), Agile
  • Platforms

    Docker, Kubernetes, Amazon Web Services (AWS), Azure, Linux, Google Cloud Platform (GCP)
  • Other

    Scaling, Website Performance, Infrastructure, AWS DevOps, Content Delivery Networks (CDN), DNS, HTTP, Networks, Cloud, Streaming, Video Streaming, Transport Layer Security (TLS), Prometheus, Kubernetes Operations (Kops), Serverless, CI/CD Pipelines
  • Languages

    Bash, JavaScript, Python, PHP 7
  • Storage

    MySQL, Redis
  • Frameworks



  • Master's Degree in Information and communications technology (ICT)
    2017 - 2018
    AGH University of Science and Technology - Cracow, Poland
  • Bachelor of Engineering Degree in AGH University of Science and Technology
    2013 - 2017
    AGH University of Science and Technology - Cracow, Poland


  • HashiCorp Certified: Terraform Associate
    OCTOBER 2021 - OCTOBER 2023
  • AWS Certified DevOps Engineer Professional
    JANUARY 2021 - JANUARY 2024
  • AWS Certified SysOps Administrator Associate
    OCTOBER 2020 - JANUARY 2024
  • CKA: Certified Kubernetes Administrator
    The Linux Foundation
  • Microsoft Certified: DevOps Engineer Expert
    JULY 2020 - JULY 2022
  • Microsoft Certified: Azure Administrator Associate
    APRIL 2020 - APRIL 2022

To view more profiles

Join Toptal
Share it with others