DevSecOps Engineer

Serhii Polhorodnyk

Building secure, scalable infrastructure and streamlining development workflows through automation and best practices.

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About Me

Who I Am

A dedicated DevSecOps engineer focused on bridging the gap between development, security, and operations.

I specialize in building secure, automated infrastructure that enables teams to deliver features safely and efficiently. With a strong background in cloud technologies and infrastructure as code, I help organizations implement robust CI/CD pipelines and ensure compliance without compromising on delivery speed. I have over 20 years of experience in IT, 1 year of experience as a DevOps Tech Lead and 5 years as a Senior DevOps and Software Engineer. I deployed and managed infrastructure on AWS and Azure clouds for 10+ clients and projects. Designed and implemented robust DevOps practices and workflows. Core competencies include infrastructure as code, container orchestration, cloud monitoring, and multi-cloud architecture. I have written more than 1000 projects in Python, bash, PowerShell, and Groovy for automation and optimization of operations and processes. I led a team of 3 DevOps engineers and collaborated with 30+ developers, testers, and stakeholders to deliver high-quality solutions that meet the business and technical requirements. Constantly seek to improve skills and knowledge in the DevSecOps domain.

My expertise spans across Azure and AWS cloud infrastructure, containerization with Docker and Kubernetes, and implementing security best practices throughout the development lifecycle.

I'm passionate about automation, continuous improvement, and creating resilient systems that can scale with business needs while maintaining security as a top priority.

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Serhii Polhorodnyk
My Expertise

Technical Skills

Core competencies that drive my approach to DevSecOps and cloud infrastructure.

Cloud Infrastructure

Expert in Azure services including Vnets, Web Apps, WAF, AGW, Networking, IAM security, Cost/Security/Resilience optimisation, Azure Devops. Experience with AWS including EC2, S3, Lambda, ECS, CloudFormation, CloudFront, EKS.

Infrastructure as Code

Expert with Terraform, Terragrunt, AWS CloudFormation, Python troposphere, AWS SDK for automated infrastructure provisioning.

CI/CD

Experienced in building and optimizing pipelines using Jenkins, GitHub Actions, GitLab CI, Circle CI.

Containerization

Skilled in Docker, Kubernetes, Azure ACS/AKS, and Helm for container orchestration.

Security

Implementation of SAST/DAST, SOC2/OWASP/NIST compliance automation, and secret management solutions.

Monitoring

Expert with Azure Monitor for system monitoring. Expirience with Prometheus, Grafana, Zabbix, Nagios.

Work History

Professional Experience

My journey as a DevSecOps engineer and the impact I've made along the way.

2024 - Present

Senior DevSecOps Engineer

Impressit

  • Implemented infrastructure as code using Terraform and Terragrunt to provision and manage Azure resources
  • Established secure and fast CI/CD pipelines with integrated security scanning
  • Automated compliance checks and reporting for SOC2/OWASP/NIST requirements
  • Established Azure Devops best practices
  • Provided cost optimisation and saved $80000 yearly
  • Lead creation of a new staging environment from scrach
  • Implemented Azure Policies compliance
2021 - 2024

Lead DevOps Engineer

SoftServe Inc.

  • Spearheaded bug isolation efforts for AKS/AWS, Terraform, PowerShell/Bash/Python scripts, CloudFormation scripts, and ARM templates, fixed more then 100 critical production bugs
  • Optimized software applications, leaded to a 30% reduction in post-release defects and enhanced overall system stability
  • Established task progress tracking and pull request cross-review practices, resulting in a 40% reduction in code review time and a 25% increase in project completion efficiency
  • Constructed efficient codebase in accordance with Azure and Terraform Well-Architected Framework guidelines
  • Transformed maintenance processes through the development of an automated Azure pipeline for daily infrastructure and application updates using Terraform
  • Facilitated to platform architecture and design concepts for cloud industry applications. Uniting chunks of terraform modules/code across 100+ repositories to the one main codebase
  • Drafted documentation in accordance with legal requirements using Step-by-step guides, Diagrams or flow charts, more then 100 artricles
  • Reorganised automation for IaC cloud platform on Azure DevOps that decreased SDLC time on 20%
  • Speeded up existing pipelines for production: achieved x8 faster results
  • Managed more then 60 AKS configurations, implementing custom kubeCost solution for AKS windows pods that decreased company costs on 15%
2020 - 2021

Senior DevOps

Ciklum Inc.

  • Integrated 3rd party services into Azure Cloud (DataDog, New Relic, Splunk) that allows company to save 10% of revenue
  • Launched modular CircleCI alternative to GitlabCI
  • Integration of C# services to AKS (Docker, Helm, C#, AKS)
  • Bridging between the developers team (12 people) from one side and the enterprise DevOps team (30 people) from another
  • Migrated 50 plain Jenkins pipelines to more complex and reliable Groovy pipelines with shared libraries
  • Engineered IaC framework utilizing Terraform and Ansible, reducing infrastructure deployment time twice
2019 - 2020

Senior DevOps

EPAM

  • Performed integration of AWS microservices to the DataDog and SumoLogic, providing 50% more visibility of the processes
  • Orchestrated the automation of system configurations with Ansible, streamlining deployment processes and achieving a 25% improvement in overall infrastructure efficiency
  • Refined IaC for 100+ microservices. (Troposhere, Cloudformation)
  • Interacted with users to gather requirements and translated into visual design
  • Examined, isolated, and solved 50+ critical bugs in software applications, resulted a 25% decrease in app crashes and improved user experience metrics by 40% over a six-month period
2018 - 2019

Senior DevOps

Levi9 Inc.

  • Integrated 3rd party services for AWS microservices
  • Developed Terrafrom code-base
  • Documented 100+ AWS@Lambda microservices
  • Production troubleshooting
2001 - 2018

System Administrator

UA companies

  • Support of a wide spectre of services
  • Building Data Centers
  • Developing E-Mail clusters
  • All tiers client-support
Get In Touch

Contact Me

Feel free to reach out if you'd like to discuss potential opportunities or collaborations.

I'm always open to discussing new projects, challenges in DevSecOps, or opportunities to share knowledge and expertise. Whether you have a question or just want to say hello, I'll try my best to get back to you!

Email

serhii.polhorodnyk@gmail.com

Location

United Kingdom

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