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Aleksander Korzynski
Verified Expert in Engineering
DevOps Engineer and Linux Software Developer
Aleksander is a veteran Linux engineer who helps organizations achieve strategic software delivery goals, such as agility, reliability, and security. As a Toptal/Google contractor, he designed a CD pipeline supporting almost 1,000 developers. At the University of Cambridge, he tuned the performance of applications in a >£1 million Linux HPC cluster. Aleksander can configure the cloud, CI/CD, and release automation.
Portfolio
Experience
Availability
Preferred Environment
Linux, DevOps, Python, Bash, CI/CD Pipelines, Docker, Kubernetes, Google Kubernetes Engine (GKE), Google Compute Engine (GCE), Argo CD
The most amazing...
...system I've developed was a comprehensive CI/CD pipeline for tracking the OpenStack project, supporting changes from over 10,000 open-source developers.
Work Experience
Linux DevOps Engineer – Harness, Argo CD, GitHub Actions
Priceline
- Designed and implemented a new CD system, used by almost 1,000 software engineers.
- Provided support to the engineers using the CI/CD pipeline.
- Responded to internal auditors on PCI and SOX compliance.
Independent Consultant – Linux, DevOps and Web
DevOpsera
- Conducted an audit of an OpenStack public cloud installation, saving the client costly support issues down the road.
- Consulted a client on setting up a CI system for building Ubuntu Linux software packages, greatly simplifying the solution they planned and saving them time and money.
- Managed software projects to develop and/or migrate about five WordPress websites, applying Kanban to achieve agility.
- Managed and mentored a software engineer to develop a bespoke Python script for promoting online events on Meetup.com.
- Hosted regular online events for tech leaders and built a community of nearly a thousand people.
- Automated audio transcriptions with Google Cloud.
- Built processes for business development using open-source technologies, such as Groundhogg CRM and Kanboard.
Linux DevOps Engineer – OpenStack
Hewlett Packard Enterprise
- Led the development of a downstream CI/CD system for OpenStack, capable of processing changes from over 10,000 open-source developers.
- Developed an extension to Git that allows for tracking patches on top of an open-source project by combining the advantages of Git merges and rebases.
- Co-developed the code for deploying OpenStack to a virtual test environment using the same Chef recipes as in production.
Linux Engineer – HPC
University of Cambridge (ClusterVision)
- Developed software for monitoring a high-performance computing (HPC) cluster, including OO analysis and design.
- Participated in a supercomputer performance research project on behalf of the University of Cambridge. Tuning the compiler, communications, OS, and applications.
- Tuned the performance of applications in a €15 million Linux HPC cluster at the Julich Supercomputing Centre, Germany–the fastest computer in Europe.
- Tuned the performance of applications in a >£1 million Linux HPC cluster at the University of Cambridge, UK–the fastest x86 computer in the UK in 2006.
- Resolved performance issues for researchers running HPC code in Linux clusters.
Linux Engineer – HPC
University of Birmingham (ClusterVision)
- Reorganized the storage for a £2.6 million Linux parallel compute cluster, increasing resilience and supportability for the in-house system administrator team.
- Developed health checking and self-healing scripts for the Linux cluster, fixing computational performance issues.
- Transferred knowledge about the cluster to in-house system administrators.
Linux Software Developer
ClusterVision
- Co-developed software for managing Linux high-performance compute clusters. Built a data collection mechanism that scales to 1,000s of nodes.
- Increased the performance of the pre-existing cluster management code by several factors. Introduced code profiling tools into the team.
- Developed internal software for managing support engineers' access to environments belonging to our clients.
- Developed internal software for monitoring the activity of support engineers on machines belonging to our clients.
Experience
A Beginner's Book on Linux
https://userbie.com/get-startedCI/CD System for OpenStack
https://devopsera.com/2014/04/federative-continuous-integration/Linux Kernel-level Checkpoint and Recovery
https://2006.dsn.org/FinalProgram.pdfCD-based Distribution of Minix
http://studia.elka.pw.edu.pl/prog/minix/ReplayGain Implementation in the LAME MP3 Encoder
https://svn.code.sf.net/p/lame/svn/trunk/lame/doc/html/history.htmlSkills
Languages
Bash, Bash Script, Python, Perl, C, C++, SQL, HTML, CSS, XML, DocBook, Java, PHP, JavaScript, XSLT, YAML
Libraries/APIs
Microsoft HPC, Standard Template Library (STL), OpenSSL
Tools
Git, GitHub, Jenkins, GitLab, GitLab CI/CD, Torque, Helm, Chef, Gerrit, Apache Tomcat, Apache, VMware, Subversion (SVN), Vagrant, LearnDash, CVS, GCC, Ansible, Google Kubernetes Engine (GKE), Google Compute Engine (GCE), Splunk
Paradigms
DevOps, Object-oriented Programming (OOP), Refactoring, Continuous Delivery (CD), Continuous Integration (CI), Continuous Deployment, Continuous Development (CD), High-performance Computing, Agile Project Management, Kanban, Object-oriented Design (OOD), Object-oriented Analysis & Design (OOAD), Scrum
Platforms
Linux, OpenStack, WordPress, Ubuntu, Debian, Kubernetes, Docker, Google Cloud Platform (GCP), Software Design Patterns, Red Hat Linux, CentOS, Fedora, Nexus, Ubuntu Linux, New Relic, Red Hat Enterprise Linux
Other
CI/CD Pipelines, Software Development, System Administration, Performance Tuning, GitFlow, Shell Scripting, Debian Packaging, Ubuntu Server, Git Flow, Git Repo, Scripting, Cloud Computing, GitOps, IP Networks, Elementor, Scrum Master, Groundhogg CRM, Argo CD, Site Reliability Engineering (SRE), Lean, Product Management, Business Development, Intellectual Property, IBM Storage, Scientific Linux, Reverse Engineering, Operating Systems, Private Clouds, Nexus IQ, DevOps Engineer, Unix Shell Scripting, SOX Compliance, SOX, PCI Compliance, Containers, Data Structures, Infrastructure as Code (IaC), Solution Architecture, Architecture
Storage
Relational Databases, GPFS, Google Cloud, MySQL
Frameworks
Google Web Toolkit, Boost
Education
Postgraduate Diploma in Entrepreneurship
Lazarski University - Warsaw, Poland
Master's Degree in Computer Science
Warsaw University of Technology, Faculty of Electronics and IT - Warsaw, Poland
Diploma in Mathematics and Physics
Stefan Batory High School - Warsaw, Poland
Certifications
Certified Scrum Master
Scrum Alliance
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