Jan Rotter, Developer in Wrocław, Poland
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Jan Rotter

Verified Expert  in Engineering

DevOps Developer

Wrocław, Poland

Toptal member since October 3, 2022

Expertise
LinuxGitNexusAWSPythonTypeScriptMachine LearningMacOSGolangMATLABC++C
Bio

Jan is a professional problem solver with experience in programming and managing Unix systems and networks. As a DevOps developer, he quickly spots opportunities for improvement and implements them on his own, increasing engineering productivity and systems performance. With his skills and expertise, he will be a great addition to any team.

Portfolio

Ocado Technology
Amazon Web Services (AWS), AWS Cloud Architecture, Python 3, GitLab, Nexus

Experience

  • Linux - 18 years
  • Amazon Web Services (AWS) - 6 years
  • Python 3 - 6 years
  • Nexus - 4 years
  • GitLab CI/CD - 4 years
  • GitLab - 4 years
  • AWS Cloud Architecture - 3 years
  • TypeScript - 3 years

Availability

Part-time

Preferred Environment

Linux, MacOS, Amazon Web Services (AWS), Go, GitLab, GitLab CI/CD, Python 3, TypeScript, AWS Cloud Architecture

The most amazing...

...thing I've developed is a credential management system for build tools that allows the instant setup of developers' workstations and projects' CI/CD pipelines.

Work Experience

Staff DevOps Engineer

2018 - PRESENT
Ocado Technology
  • Developed a credential management system for the build tools like Gradle, sbt, Maven, NuGet, and npm to simplify the setup of development environments and CI/CD pipelines. It was praised many times by our developers.
  • Designed, implemented, and maintained infrastructure for hosting a large number of artifacts within Sonatype Nexus 3 installation on AWS.
  • Diagnosed and patched several bugs in Sonatype Nexus 3 that had poor performance or invalid service behavior.
  • Created an internal shared AWS CDK library with common infrastructure patterns. This has substantially reduced the effort required to meet the compliance requirements of our infrastructure.
  • Implemented a caching proxy for the Sonatype Nexus that redirects users to pre-signed S3 URLs, significantly reducing the volume of traffic that has to be delivered by the service itself.
Technologies: Amazon Web Services (AWS), AWS Cloud Architecture, Python 3, GitLab, Nexus

Experience

A Reverse Caching Proxy to Use with Sonatype Nexus 3

A simple reverse caching proxy that integrates well with Sonatype Nexus 3 and allows offloading the traffic from the service to S3. It significantly reduces the amount of data that has to be transferred by the Nexus service itself.

Education

2011 - 2013

Master's Degree in Computer Science

Wroclaw University of Technology - Wroclaw, Poland

2007 - 2011

Bachelor's Degree in Computer Science

Wroclaw University of Technology - Wroclaw, Poland

Skills

Tools

GitLab, GitLab CI/CD, MATLAB

Platforms

Linux, Nexus, Amazon Web Services (AWS), MacOS

Languages

Python 3, TypeScript, Go, C++, ANSI C

Other

AWS Cloud Architecture, Machine Learning, Image Processing

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