Aleksander is available for hire
Hire AleksanderAleksander Korzynski
Verified Expert in Engineering
DevOps Engineer and Linux Software Developer
Warsaw, Poland
Toptal member since July 20, 2021
Bio
Aleksander is a veteran Linux engineer who helps organizations achieve strategic software delivery goals, such as agility, reliability, and security. As a Toptal and 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
Soulbound
Kubernetes, Google Kubernetes Engine (GKE), Google Cloud Platform (GCP)...
NexGen Cloud
Python, Python 3, Artificial Intelligence (AI)...
NexGen Cloud
Python, Python 3, Artificial Intelligence (AI)...
Experience
- Linux - 16 years
- Bash - 11 years
- Git - 6 years
- CI/CD Pipelines - 5 years
- Kubernetes - 5 years
- Google Cloud - 3 years
- Argo CD - 3 years
- GitHub - 3 years
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
Senior Site Reliability Engineer for Infrastructure Scaling
2026 - PRESENT
Soulbound
- Improved scalability and production readiness of a large-scale online gaming platform running on Google Cloud Platform and Kubernetes.
- Implemented observability and operational diagnostics across Kafka, PostgreSQL, MongoDB, Redis, and distributed microservices, significantly improving incident investigation and system visibility.
- Optimized autoscaling, database performance, and messaging pipelines to support high-load launch preparation and platform stability for the startup.
Technologies: Kubernetes, Google Kubernetes Engine (GKE), Google Cloud Platform (GCP), PostgreSQL, MongoDB, Redis, Terraform, GitLab CI/CD, Helm, TypeScript, Node.js, Istio, Apache Kafka
Head of Architecture
2025 - 2026
NexGen Cloud
- Led the architecture of an AI and GPU platform, including capacity enforcement, identity management, and security controls.
- Designed core systems, including secure multi-tenant isolation, input validation, and error management.
- Reduced cost leakage and improved reliability of distributed systems.
- Built security and compliance frameworks, contributing to SOC2 readiness.
- Established engineering standards and drove cross-functional architectural alignment.
Technologies: Python, Python 3, Artificial Intelligence (AI), Generative Artificial Intelligence (GenAI), Open-source LLMs, Large Language Models (LLMs), Large Language Model Operations (LLMOps), Machine Learning Operations (MLOps), Machine Learning, Architecture, Software Architecture, GPU Computing, Graphics Processing Unit (GPU), OAuth 2, OAuth, Authentication, User Authentication, Security, Flask, SQLAlchemy, FastAPI, Kubernetes, Docker, Docker Compose, Infrastructure, Communication, Leadership, SaaS, Software as a Service (SaaS), New Products, Strategy, Node.js, JavaScript, Configuration Management, Middleware, OpenID Connect (OIDC), Clean Architecture, Domain-driven Design (DDD), Express.js, Prompt Engineering, TypeScript, Dependency Injection, Technical Leadership, Repository Pattern, Role-based Access Control (RBAC), Pydantic, AI Design, AI Programming, React, Microservices, Redis, CTO, Full-stack Development
Software Architect
2025 - 2025
NexGen Cloud
- Architected the usage record-keeping and billing functionality in a new AI- and LLM-related application.
- Designed and implemented the OAuth 2.0 workflow in the application, enabling authentication using the existing user database.
- Conducted a security audit of the application, including: a dependency check, static code analysis, and manual code review.
Technologies: Python, Python 3, Artificial Intelligence (AI), Generative Artificial Intelligence (GenAI), Open-source LLMs, Large Language Models (LLMs), Large Language Model Operations (LLMOps), Machine Learning Operations (MLOps), Machine Learning, Architecture, Software Architecture, GPU Computing, Graphics Processing Unit (GPU), OAuth 2, OAuth, Authentication, User Authentication, Security, Flask, SQLAlchemy, FastAPI, Kubernetes, Docker, Docker Compose, Infrastructure, Communication, Leadership, SaaS, New Products, Software as a Service (SaaS), Strategy, Configuration Management, Debugging Tools, Middleware, OpenID Connect (OIDC), Clean Architecture, Dependency Injection, Domain-driven Design (DDD), Express.js, Prompt Engineering, Node.js, TypeScript, Technical Leadership, Role-based Access Control (RBAC), AI Design, AI Programming, React, Microservices, CTO, Full-stack Development
DevOps Engineer
2024 - 2025
Tealbook
- Developed Terraform code for a disaster recovery plan for pre-existing GCP infrastructure, balancing cost and acceptable recovery point objective (RPO) and recovery time objective (RTO).
- Automated the deployment of MongoDB Atlas, CloudAMQP, CloudSQL, and other core services to GCP using Terraform, including multi-region capability, development and prod environments, and monitoring.
- Enhanced Kubernetes job deployments using Argo CD and Argo CD Image Updater.
Technologies: Kubernetes, Google Cloud Platform (GCP), Terraform, Docker, Python, Disaster Recovery Plans (DRP), Security, Bash, Bash Script, MongoDB, Google Kubernetes Engine (GKE), Argo CD, Git, GitHub, GitHub Actions, Google Cloud, Integration, Startups, Scalability, Load Balancers, Cloud Infrastructure, RabbitMQ, CloudAMQP, Google Cloud SQL, Infrastructure, Communication, SaaS, Software as a Service (SaaS), Configuration Management, Debugging Tools, NoSQL, Prompt Engineering, AI Programming, Microservices, Full-stack Development
DevOps Engineer
2021 - 2024
Priceline
- Designed and implemented a new Kubernetes (GKE) deployment system, incorporating security, quality, and compliance checks while maintaining good developer experience for hundreds of software engineers.
- Architected and implemented a Helm chart rendering system, featuring rendering preview on GitHub pull requests and the ability for the central DevOps team to enforce specific parts of the configuration.
- Developed an innovative extension to Argo Rollouts: a synchronization barrier for parallel deployments to different Kubernetes clusters.
- Designed and implemented a new deployment pipeline to Ionic (a Progressive Web App framework), allowing developers to maintain separate deployment channels for different native app versions.
- Implemented REST endpoints in a custom internal application at the crux of the build and deployment system.
- Supported the enterprise with migration to Google Cloud Platform (GCP).
Technologies: Bash, Bash Script, JavaScript, Python, CI/CD Pipelines, GitHub, Git, Git Repo, Nexus, Nexus IQ, Argo CD, DevOps, Linux, Ubuntu, Ubuntu Linux, Ubuntu Server, DevOps Engineer, YAML, Ansible, Google Cloud Platform (GCP), Google Kubernetes Engine (GKE), Docker, Scripting, Shell Scripting, Unix Shell Scripting, SOX Compliance, SOX, PCI Compliance, Google Compute Engine (GCE), Google Cloud, Kubernetes, Splunk, New Relic, Containers, Data Structures, Infrastructure as Code (IaC), Site Reliability Engineering (SRE), Solution Architecture, Cloud Computing, Architecture, GitOps, Helm, Cloud Engineering, Cloud Architecture, Cloud, Terraform, Cloud Migration, Node.js, Software Architecture, Java, Debian Linux, SSH, Code Review, Code Auditing, High Code Quality, Software Development Lifecycle (SDLC), OAuth 2, API Integration, APIs, REST APIs, JSON, Unix/Linux Virtualization, Virtualization, Web App Deployment, API Development, Webhooks, Containerization, MySQL, Code Deployment, GitHub Actions, GitHub API, Cloud Infrastructure, DevSecOps, IT Security, Software Design, Agile, Full-stack, Technical Leadership, Technical Requirements, Python 3, GitHub Workflows, Orchestration, SecOps, Decentralized Systems, Back-end Development, Google Cloud SQL, Google Cloud Functions, Google Cloud Storage, GCP Security, Identity & Access Management (IAM), Monitoring, Canary Deployment, Integration, Multithreading, Asyncio, Multiprocessing, Scalability, Load Balancers, On-premise, Infrastructure, Communication, Enterprise, SaaS, Software as a Service (SaaS), Configuration Management, Debugging Tools, NoSQL, Security, Authentication, Clean Architecture, Dependency Injection, Express.js, Prompt Engineering, TypeScript, Domain-driven Design (DDD), Repository Pattern, Role-based Access Control (RBAC), AI Programming, React, Microservices, Redis, Istio, Apache Kafka, Full-stack Development
Independent Consultant – Linux, DevOps, Web
2019 - 2021
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.
Technologies: Linux, WordPress, OpenStack, Python, HTML, CSS, JavaScript, Bash, Elementor, Agile Project Management, Kanban, DevOps, Lean, Business Development, Intellectual Property, Software Development, IP Networks, Git, Debian, Apache, MySQL, XML, Vagrant, System Administration, XSLT, DocBook, Docker, Private Clouds, Bash Script, Ubuntu Server, Debian Packaging, Shell Scripting, Groundhogg CRM, Google Cloud Platform (GCP), GitLab, GitLab CI/CD, Git Flow, Git Repo, Continuous Delivery (CD), Continuous Integration (CI), Continuous Deployment, Continuous Development (CD), Google Cloud, Site Reliability Engineering (SRE), Cloud Computing, Scripting, GitOps, Cloud Engineering, Cloud Architecture, Cloud, Software Architecture, SSH, Nextcloud, Email, Mail Servers, Code Review, Code Auditing, High Code Quality, Software Development Lifecycle (SDLC), OAuth 2, API Integration, APIs, REST APIs, JSON, Unix/Linux Virtualization, Virtualization, Web App Deployment, Code Deployment, Django REST Framework, Django, Software Design, Agile, Technical Leadership, Technical Requirements, Python 3, Single Sign-on (SSO), Docker Compose, PostgreSQL, Back-end Development, Integration, Startups, Multithreading, GoDaddy, On-premise, Infrastructure, Communication, Leadership, New Products, Strategy, Configuration Management, Debugging Tools, Full-stack Development
Linux DevOps Engineer – OpenStack
2011 - 2019
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.
Technologies: Linux, Jenkins, Chef, Git, Bash, Python, Gerrit, Ubuntu, OpenStack, DevOps, Perl, CI/CD Pipelines, Software Development, Object-oriented Programming (OOP), IP Networks, Relational Databases, HTML, CSS, Kanban, Red Hat Linux, Refactoring, Scrum, System Administration, Private Clouds, GitFlow, Bash Script, Ubuntu Server, Debian Packaging, Shell Scripting, Git Flow, Git Repo, Continuous Delivery (CD), Continuous Integration (CI), Continuous Deployment, Continuous Development (CD), Data Structures, Solution Architecture, Cloud Computing, Architecture, Scripting, Rocky Linux, Red Hat Enterprise Linux, Cloud Engineering, Cloud Architecture, Cloud, Software Architecture, Debian Linux, SSH, Code Review, High Code Quality, Software Development Lifecycle (SDLC), API Integration, APIs, REST APIs, Unix/Linux Virtualization, Virtualization, Web App Deployment, Django, RabbitMQ, API Development, Code Deployment, Cloud Infrastructure, Software Design, Agile, Technical Leadership, Technical Requirements, Orchestration, Decentralized Systems, Back-end Development, Integration, Multithreading, Multiprocessing, Scalability, On-premise, Infrastructure, Communication, Enterprise, Configuration Management, Debugging Tools, Security, Dependency Injection, Microservices, Full-stack Development
Linux Engineer – HPC
2009 - 2011
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.
Technologies: Linux, Java, Apache Tomcat, Apache, Perl, MySQL, Google Web Toolkit, Object-oriented Programming (OOP), Object-oriented Design (OOD), Object-oriented Analysis & Design (OOAD), PHP, Refactoring, Software Design Patterns, Performance Tuning, DevOps, Bash, Software Development, SQL, IP Networks, Relational Databases, HTML, CSS, Fedora, Scientific Linux, System Administration, Private Clouds, Bash Script, Shell Scripting, Microsoft HPC, High-performance Computing (HPC), Torque, Site Reliability Engineering (SRE), Cloud Computing, Scripting, Software Architecture, SSH, High Code Quality, Software Development Lifecycle (SDLC), APIs, Software Design, Full-stack, Decentralized Systems, Back-end Development, Monitoring, Multithreading, Multiprocessing, Scalability, On-premise, GPU Computing, Infrastructure, Communication, Front-end Development, Debugging Tools, Full-stack Development
Linux Engineer – HPC
2009 - 2009
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.
Technologies: Linux, GPFS, Perl, Bash, IBM Storage, DevOps, Software Development, IP Networks, Scientific Linux, Performance Tuning, System Administration, Private Clouds, Bash Script, Shell Scripting, Microsoft HPC, High-performance Computing (HPC), Site Reliability Engineering (SRE), Cloud Computing, Scripting, SSH, Decentralized Systems, Monitoring, Multithreading, Multiprocessing, Scalability, On-premise, Infrastructure, Communication, Full-stack Development
Linux Software Developer
2007 - 2008
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.
Technologies: Linux, C++, Standard Template Library (STL), Boost, Perl, Bash, XML, OpenSSL, VMware, MySQL, Subversion (SVN), Object-oriented Programming (OOP), Object-oriented Design (OOD), Software Design Patterns, DevOps, C, Software Development, SQL, IP Networks, Relational Databases, Debian, Red Hat Linux, CentOS, Refactoring, Performance Tuning, System Administration, Private Clouds, Bash Script, Shell Scripting, Microsoft HPC, High-performance Computing (HPC), Data Structures, Scripting, Red Hat Enterprise Linux, Rocky Linux, Software Architecture, SSH, High Code Quality, Software Development Lifecycle (SDLC), API Integration, APIs, Software Design, Agile, Decentralized Systems, Back-end Development, Monitoring, Integration, Multithreading, Multiprocessing, Scalability, Infrastructure, Communication, Configuration Management, Debugging Tools, Middleware, Full-stack Development
Experience
A Beginner's Book on Linux
https://userbie.com/get-startedCo-authored an online book entitled "Get Started on Linux by End of Tonight – Without Breaking Your Box." Modified existing Bash, Perl, and XSLT code to have DocBook generate special feedback links at the end of every paragraph so that readers can easily provide feedback. Converted the book into an online course based on WordPress and LearnDash.
CI/CD System for OpenStack
https://devopsera.com/2014/04/federative-continuous-integration/I built a downstream CI/CD system for OpenStack, a project with up to 50 daily changes from tens of thousands of open-source developers. To manage temporary patches on top of OpenStack without forking from the open-source community, I created custom Git extensions.
Linux Kernel-level Checkpoint and Recovery
https://2006.dsn.org/FinalProgram.pdfAn implementation of checkpoint and recovery in the OpenSSI kernel-level clustering platform for Linux. Analyzed the problem, reverse-engineered the undocumented C source code of OpenSSI, and implemented selected elements of the mechanism. I published a paper related to the project at the student forum of an IEEE/IFIP conference in the USA. Received an award for the paper from the IEEE-CS Technical Committee on Fault-tolerant Computing. I completed this work for my master's thesis.
CD-based Distribution of Minix
http://studia.elka.pw.edu.pl/prog/minix/This was the first distribution of the Minix operating system that could be booted from a CD. The idea for the project originated from an academic professor at the Warsaw University of Technology, where I was a student. The work included programming in C to implement the new functionality in the Minix kernel. The distribution had tens of thousands of users worldwide and was mirrored on the website of one of the co-authors of the famous operating systems book, Albert S. Woodhull.
ReplayGain Implementation in the LAME MP3 Encoder
https://svn.code.sf.net/p/lame/svn/trunk/lame/doc/html/history.htmlImplemented a new feature in the most popular MP3 encoder in the world. The feature ensures that different songs are played at the same perceived volume so that the listener does not have to reach the volume knob every time a different song is played. My work involved C programming to integrate the ReplayGain standard into the LAME MP3 encoder, which has millions of users.
Education
2015 - 2017
Postgraduate Diploma in Entrepreneurship
Lazarski University - Warsaw, Poland
2001 - 2007
Master's Degree in Computer Science
Warsaw University of Technology, Faculty of Electronics and IT - Warsaw, Poland
1997 - 2001
Diploma in Mathematics and Physics
Stefan Batory High School - Warsaw, Poland
Certifications
OCTOBER 2011 - OCTOBER 2013
Certified Scrum Master
Scrum Alliance
Skills
Libraries/APIs
Microsoft HPC, API Development, Asyncio, Node.js, REST APIs, Standard Template Library (STL), OpenSSL, GitHub API, SQLAlchemy, Pydantic, React
Tools
Git, GitHub, Google Kubernetes Engine (GKE), Helm, Terraform, Jenkins, GitLab, Torque, Docker Compose, GCP Security, Chef, Gerrit, Apache Tomcat, Apache, VMware, Subversion (SVN), Vagrant, LearnDash, CVS, GCC, GitLab CI/CD, Ansible, Google Compute Engine (GCE), Splunk, RabbitMQ, Rocky Linux, Istio
Languages
Python, Perl, Bash, C, Bash Script, C++, Java, SQL, HTML, CSS, JavaScript, XML, DocBook, Python 3, TypeScript, PHP, XSLT, YAML
Frameworks
OAuth 2, Django, Express.js, Google Web Toolkit, Boost, Django REST Framework, Flask
Paradigms
DevOps, Object-oriented Programming (OOP), Refactoring, Continuous Delivery (CD), Continuous Integration (CI), Continuous Deployment, Continuous Development (CD), High-performance Computing (HPC), DevSecOps, Agile, Role-based Access Control (RBAC), Microservices, Agile Project Management, Kanban, Object-oriented Design (OOD), Object-oriented Analysis & Design (OOAD), Scrum, Clean Architecture, Dependency Injection
Platforms
Linux, Ubuntu, Kubernetes, Docker, Google Cloud Platform (GCP), Debian Linux, OpenStack, WordPress, Debian, Software Design Patterns, Red Hat Linux, CentOS, Fedora, Nexus, Ubuntu Linux, New Relic, Red Hat Enterprise Linux, Apache Kafka
Storage
JSON, On-premise, Relational Databases, MySQL, GPFS, Google Cloud, Nextcloud, Google Cloud SQL, MongoDB, PostgreSQL, Google Cloud Storage, NoSQL, Redis
Other
CI/CD Pipelines, Software Development, System Administration, Performance Tuning, GitFlow, Shell Scripting, Debian Packaging, Ubuntu Server, Git Flow, Git Repo, Argo CD, Scripting, Containers, Site Reliability Engineering (SRE), Cloud Computing, Architecture, GitOps, Cloud Engineering, Cloud Architecture, Cloud, Cloud Migration, Software Architecture, SSH, Code Review, High Code Quality, Software Development Lifecycle (SDLC), API Integration, APIs, Unix/Linux Virtualization, Virtualization, Web App Deployment, Webhooks, Containerization, Code Deployment, GitHub Actions, Cloud Infrastructure, Software Design, GitHub Workflows, Decentralized Systems, Back-end Development, Monitoring, Canary Deployment, Integration, Startups, Multithreading, Multiprocessing, Scalability, GPU Computing, Authentication, User Authentication, Infrastructure, Communication, Enterprise, SaaS, New Products, Software as a Service (SaaS), Strategy, Configuration Management, Debugging Tools, Middleware, CTO, Full-stack Development, IP Networks, Elementor, Scrum Master, Groundhogg CRM, Infrastructure as Code (IaC), Code Auditing, IT Security, Full-stack, Technical Leadership, Technical Requirements, Orchestration, SecOps, Identity & Access Management (IAM), Security, Artificial Intelligence (AI), Domain-driven Design (DDD), Prompt Engineering, AI Design, AI Programming, 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, Data Structures, Solution Architecture, Email, Mail Servers, Single Sign-on (SSO), Google Cloud Functions, Disaster Recovery Plans (DRP), Load Balancers, GoDaddy, CloudAMQP, Generative Artificial Intelligence (GenAI), Open-source LLMs, Large Language Models (LLMs), Large Language Model Operations (LLMOps), Machine Learning Operations (MLOps), Machine Learning, Graphics Processing Unit (GPU), OAuth, FastAPI, Front-end Development, Leadership, OpenID Connect (OIDC), Repository Pattern
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring