Aleksy is available for hire
Hire AleksyAleksy Zaleński
Verified Expert in Engineering
Networks Developer
Kraków, Poland
Toptal member since August 7, 2019
Bio
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.
Portfolio
Branch
Amazon Web Services (AWS), Kubernetes, Apache Kafka, GitHub, Flyway, Git...
Toptal Client
Amazon Web Services (AWS), Kubernetes, CI/CD Pipelines, AWS DevOps, Ansible...
Architech
Amazon Web Services (AWS), Azure DevOps, Serverless, DevOps, Azure, Cloud...
Experience
Availability
Part-time
Preferred Environment
Linux
The most amazing...
...project I've worked on is the migration of an entire company infrastructure to Kubernetes.
Work Experience
Senior DevOps Engineer
2022 - PRESENT
Branch
- Maintained and managed infrastructure of 2000+ Amazon EC2 instances and over 40 Amazon EKS Kubernetes clusters.
- Designed and created a database management process using Flyway and GitHub Actions for over 60 databases managed by over 100 developers.
- Worked on multiple cost-saving projects that allowed the company to save 100,000+ dollars per year.
Technologies: Amazon Web Services (AWS), Kubernetes, Apache Kafka, GitHub, Flyway, Git, Scaling, MySQL, Networks, Helm
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 Amazon EC2 instances, 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 Elastic Container Service (ECS), Docker, Terraform
DevOps Engineer
2020 - 2022
Architech
- 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.
- Migrated a big company's on-premise infrastructure to Azure. We created Azure landing zones using the best practices of Terraform Cloud and Cloud Adoption Framework.
Technologies: Amazon Web Services (AWS), Azure DevOps, Serverless, DevOps, Azure, Cloud, CI/CD Pipelines, Website Performance, Infrastructure, Agile
DevOps Engineer
2018 - 2020
Callpage
- Created and maintained the company's microservices infrastructure deployed using Kubernetes Operations (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 the entire customer infrastructure to Kubernetes.
Technologies: Amazon Web Services (AWS), Bash, Kubernetes, Terraform, Docker, Linux, Laravel, Kubernetes Operations (kOps), Continuous Delivery (CD), Continuous Integration (CI)
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 configuration, debugging, documentation, testing, and go-live support.
- Prepared configurations for significant events such as the Olympics and the European 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), Transport Layer Security (TLS)
Experience
Migration of a Company Infrastructure to Kubernetes
I migrated 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 scalable and resilient to failures.
Migration of an Entire Customer Infrastructure to Terraform
I was responsible for migrating the entire customer AWS infrastructure, 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 Terraform modules.
Migration of an Infrastructure from On-premise to Azure
Acting as a DevOps Engineer, I was involved in migrating 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 ensuring it could handle the load of millions of users connected at once, with minimum latency and re-buffering.
Education
2017 - 2018
Master's Degree in Information and communications technology (ICT)
AGH University of Science and Technology - Cracow, Poland
2013 - 2017
Bachelor of Engineering Degree in AGH University of Science and Technology
AGH University of Science and Technology - Cracow, Poland
Certifications
OCTOBER 2023 - OCTOBER 2026
Certified Systems Administrator
The Linux Foundation
OCTOBER 2021 - OCTOBER 2023
HashiCorp Certified: Terraform Associate
HashiCorp
JANUARY 2021 - JANUARY 2024
AWS Certified DevOps Engineer Professional
AWS
OCTOBER 2020 - JANUARY 2024
AWS Certified SysOps Administrator Associate
AWS
SEPTEMBER 2020 - SEPTEMBER 2023
CKA: Certified Kubernetes Administrator
The Linux Foundation
JULY 2020 - JULY 2024
Microsoft Certified: DevOps Engineer Expert
Microsoft
APRIL 2020 - APRIL 2024
Microsoft Certified: Azure Administrator Associate
Microsoft
Skills
Tools
Git, Terraform, GitLab, Grafana, Helm, Jenkins, Ansible, Istio, Amazon Elastic Container Service (ECS), GitHub, Flyway
Paradigms
DevOps, Azure DevOps, Continuous Delivery (CD), Continuous Integration (CI), Agile
Platforms
Docker, Kubernetes, Amazon Web Services (AWS), Azure, Linux, Google Cloud Platform (GCP), Apache Kafka
Languages
Bash, JavaScript, Python, PHP 7
Storage
MySQL, Redis
Frameworks
Laravel
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, HTTP Live Streaming (HLS), Akamai
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