Denys is available for hire

Denys Zinevych

Verified Expert in Engineering

Linux Developer

Location

Kraków, Poland

Toptal Member Since

October 12, 2022

Denys is an experienced developer who specializes in and enjoys working with Linux and UNIX systems. His background includes around 15 years of supporting and managing all systems that run on Linux or UNIX. Having worked with containers back when Docker didn't exist, including jails, OpenVZ, and LXC, moving containerized and de-containerized systems from on-premises to the cloud and back, Denys is eager to take on new challenges to deliver exceptional results.

Linux PostgreSQL NGINX Jenkins Apache Maven Terraform Cloud Apache Tomcat MySQL WordPress Amazon Web Services (AWS)Python Apache Karaf Nexus Ansible FreeRADIUS uWSGI

Portfolio

NDA Enterprise Company

Amazon Web Services (AWS), Terraform, Ansible, PostgreSQL

Playtech

Apache Maven, Bamboo, Linux, Apache Karaf, Apache Tomcat, NGINX, Jenkins, Nexus...

Experience

Linux - 15 years MySQL - 14 years PostgreSQL - 14 years Jenkins - 12 years CFEngine 3 - 8 years Terraform - 4 years Kubernetes - 2 years

Availability

Part-time

Preferred Environment

Linux

The most amazing...

...solution I've devised saved infrastructure from being blocked after the ICP license was revoked.

Work Experience

Engineering Manager

2018 - PRESENT

NDA Enterprise Company

Supported and evolved multi-region enterprise infrastructure running in AWS and utilizing numerous AWS services.
Established operations processes and improved PS department life using Jenkins.
Handled numerous high-traffic events and prevented many production outages.

Technologies: Amazon Web Services (AWS), Terraform, Ansible, PostgreSQL

Professional Services Team Lead

2012 - 2018

Playtech

Created a team of six to manage complex environments, production support, development support, and quality assurance (QA) teams.
Conducted educational courses to improve QA and developer skills in client–server-related activities.
Built complete infrastructure for several projects, including continuous integration (CI), artifacts storage, deployments, and monitoring.
Increased developer and QA teams' efficiency by providing multiple tools to automate some of their tasks.

Technologies: Apache Maven, Bamboo, Linux, Apache Karaf, Apache Tomcat, NGINX, Jenkins, Nexus, OpenVZ

Experience

BackBox Project Recovery

I've recovered a project running on Docker images in AWS, which was completely wiped out by personnel. All I've got as input was repositories and a few years of skype chat history. There was some conflict, and nobody was technically competent to answer any question. So eventually, I reverse-engineered how the system looked and restored it to an operational and manageable state.

VPN Network

https://anonine.com

I've redesigned and merged the infrastructure of five virtual private network (VPN) companies bought at different times. The technical personnel disappeared, so I had to reverse-engineer lots of things. After all, I unified the infrastructure, established processes, and brought it to a manageable state.

FotoFinder

https://www.fotofinder.de/

For this project, I moved the app from on-premise to Kubernetes hosted on AWS. I reworked the Docker approach, set up clusters, launched the app, and performed performance testing to ensure autoscaling worked properly. I also established CD processes for development and strategic environments.

Skills

Tools

Apache Maven, NGINX, Jenkins, Terraform, Bamboo, Apache Karaf, Apache Tomcat, Ansible, Google Compute Engine (GCE), VPN, uWSGI

Frameworks

CFEngine 3

Platforms

Linux, Nexus, Kubernetes, Docker, WordPress, Amazon Web Services (AWS)

Storage

PostgreSQL, MySQL

Languages

Python

Paradigms

DevOps

Other

OpenVZ, FreeRADIUS, CI/CD Pipelines, Cloud, Architecture, Web Services

Collaboration That Works

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