System engineer with experience in different areas of IT. Like to solve issues and fixing errors. Worked a lot with onprem solutions, now mostly with cloud (AWS, GCP)
VMWare
NGINX
Windows Server
Linux
Amazon Web Services
Containerization
HTTP
Terraform
G-Cloud
Amazon ECS
Amazon
Git
Kubernetes
Docker
Amazon EC2
Linux System Administration
DevOps
Seweryn K.
Opole, Poland
$85/hr
5.0
145 jobs
With over 15 years of extensive experience in the IT infrastructure domain, I am a Top Rated Plus Freelancer on Upwork, celebrated for delivering excellence across more than 100 projects globally. My expertise encompasses a broad spectrum of technologies, including cloud platforms such as Azure, GCP, and AWS, as well as mastery in Office 365 and Google Workspace, ensuring enhanced collaboration and operational efficiency.
Throughout my career, I have excelled in roles such as CTO and Senior Infrastructure Engineer, showcasing a harmonious blend of strategic leadership and deep technical expertise. My portfolio includes sophisticated projects in Windows Server management, virtualization with VMware ESXi and Hyper-V, and implementing comprehensive backup solutions with Veeam Backup & Replication.
I specialize in executing seamless migrations to cloud services, optimizing IT ecosystems for peak performance, and developing robust disaster recovery plans that guarantee business continuity. My commitment to operational excellence and compliance is evident in my successful leadership of SOC2 and HIPAA compliance initiatives.
Armed with a Master’s degree in Computer Science and fluent English proficiency, I am prepared to confront and solve complex IT challenges, providing scalable, secure, and innovative solutions. I am dedicated to leveraging my extensive experience to contribute to the success of your next project, driving growth and technological advancement within your organization.
VMware Administration
VMWare
System Administration
Windows Server
Google Cloud Platform
Microsoft Windows PowerShell
Amazon Web Services
Microsoft Hyper-V Server
Veeam
VMware ESX Server
ConnectWise Automate
Amazon ECS
Sergiy V.
Warsaw, Poland
$23/hr
5.0
5 jobs
Installation and maintenance of Windows 7/8/2003/2008/2012/2016/2019/20222025, Linux, MacOs, VmWare ESXi, vSphere, AWS, Hyper-V, AD, GP, DNS, DHCP, WSUS, Terminal Services, FTP, Mail, Firewall, Exchange, PRTG, pFsense, installation of VPN, Veeam Backup & Replication, Acronis.
MS Office.
Installation Windows on Hetzner dedicated server/
Configuration of HP, Dell, SuperMicro servers.
Dell, Huawei storage systems.
Remote work experience, KVM, IPMI, Plesk.
Management of equipment and consumable purchases.
Windows Server
Microsoft IIS
Linux
Microsoft Hyper-V Server
VMware ESX Server
Mail Server Implementation
IT Support
Remote IT Management
Data Recovery
DNS
DHCP
Office 365
Microsoft Active Directory
System Administration
Computer Hardware
Serge B.
Krakow, Poland
$22/hr
5.0
13 jobs
Summary:
Senior Manual QA Engineer with 10+ years experience in software quality assurance. Successfully led QA teams at Logic Software Inc., improving customer satisfaction from 70% to 99.9%. Managed and executed tests for various web-based and desktop tools, mobile apps, ensuring high-quality product delivery.
Seeking to leverage extensive QA expertise to contribute to top-tier software quality at your organization.
Work experience:
Logic Software Inc., Senior QA Engineer / QA Manager, 2018 - 2025
• Managed projects including Easy Projects, Birdview PSA, ETT, Logic Protect, and Easy Vending, ensuring alignment with quality standards.
• Developed and managed processes to ensure products met quality, function, and reliability standards, and communicated these standards to QA and product development teams.
• Coordinated and improved product testing processes, increasing customer satisfaction from 70% to 99.9%.
• Executed functional software and hardware tests for multi-tier web-based and mobile project and resource management systems, APIs, time-tracking tools, license management desktop tools, and vending machine management tools using Postman and Android emulators.
• Supervised QA department activities and staff, establishing high-quality standards and efficient workflow.
• Reviewed client, customer, and user feedback to identify areas for improvement, leading to enhanced product quality and customer satisfaction.
ITA Labs, QA Engineer (part-time), 2015 - 2018
• Managed projects including IMS, IDSearch, IDCheck, and Secret Disk Enterprise, ensuring timely delivery and quality.
• Performed functional, regression, integration, and usability testing of complex .NET biometric identification projects and their APIs using Target Process and Chrome Dev Tools, ensuring data protection and centralized management.
• Created and maintained Windows, MS SQL Server test environments using VMware and Hyper-V, improving testing efficiency and reliability.
Skills:
• Strong leadership, Problem-solving and Analytical skills, Multi-tasking, Meticulous attention to detail, Focus on quality and usability, Troubleshooting, Functional testing, Non-functional testing, Software testing, Hardware testing.
• Cloud technologies: MS Azure, Entra ID (Azure AD), AWS.
• OS administration: Windows servers, Active Directory, Linux, Unix, macOS, Android, iOS.
• RDBMS administration / reports: MS SQL, MySQL, PostgreSQL, Oracle DB; PowerBI.
• Development methodologies / environment: Agile / Scrum, Waterfall; CI/CD, Azure DevOps, GitHub, MS Testing Center.
• Project / resource management: Jira, Easy Projects/Birdview, Asana, Wrike, MS Project.
• CRM tools: Salesforce, Hubspot, Zendesk.
• Web servers: Web servers: IIS, Nginx.
• Virtual machines: VMware, Hyper-V, VirtualBox.
• Rest API tools: Postman, SoapUI, Swagger.
• Integration tools: Zapier, Albato.
• Monitoring tools: Fiddler, New Relic, Azure DevOps Dashboards, Chrome dev tools, Logcat, Grafana.
• Mobile / Web testing: Android Studio, Android/iOS emulators, LambdaTest, Browserstack, Figma, HTML/CSS, JSON/XML.
• Shells: PowerShell, Bash.
• Containers / MQ: Docker, Kubernetes; RabbitMQ.
• Network technologies: TCP/IP, Ethernet, FTP, Firewalls, Wireless.
• Authentication protocols / specifications: OAuth2, SAML, LDAP, Azure AD, ADFS.
Languages:
Russian: Native.
English: B2 Upper Intermediate.
Education:
BSUIR University of Informatics and Radioelectronics
Bachelor of Science degree in Computer Engineering.
Docker
Usability Testing
Functional Testing
SQL
QA Management
Software QA
Technical Support
Microsoft IIS
Virtual Machine
Customer Support
System Maintenance
System Administration
Bug Reports
Incident Management
Microsoft Azure
Ivan K.
Krakow, Poland
$59/hr
5.0
54 jobs
Are your deployments slow, breaking at the worst moments, or costing more than they should? Is your team spending hours on manual releases instead of shipping features? If your CI/CD pipelines are fragile, your Azure infrastructure is growing out of control, or your DevOps processes exist only on paper, you are dealing with a problem that will not fix itself.
I am a DevOps Engineer and Azure Architect with 10+ years of experience helping product teams and growing companies build cloud infrastructure that actually works. Whether it is a startup scaling fast or an enterprise team drowning in legacy pipelines, I come in, assess the real state of things, and build systems that are stable, automated, and cost-efficient.
My primary expertise is Microsoft Azure and Azure DevOps, end to end. That means everything from designing multi-stage Azure DevOps pipelines and managing releases without downtime, to setting up Azure DevOps RBAC, securing environments, and integrating Azure DevOps with Kubernetes clusters running on AKS. I have built Azure DevOps workflows for teams of 5 and teams of 150, and the approach scales both ways. Every Azure DevOps implementation I deliver is built around real business goals, not just tooling checkboxes.
Beyond Azure DevOps, I work across the full infrastructure stack. I design Cloud Architecture using Terraform for Infrastructure as Code, manage containerized workloads with Kubernetes and Docker, and implement Deployment Automation that removes human error from the release process. For data-heavy projects, I build pipelines with Azure Data Factory to handle ETL, orchestration, and integration between services.
For teams building decentralized or blockchain-integrated solutions, I have worked with Azure Blockchain Service as part of broader Microsoft Azure infrastructure setups, combining it with the same security and governance standards applied across all environments.
As an Azure Architect, I cover Cloud Computing governance, cost optimization, and FinOps practices, so your Azure bill reflects actual usage, not waste. I apply the same structured thinking to Network Security, Linux and Windows Server environments, and multi-cloud setups when needed.
When projects require Amazon Web Services, I bring the same DevOps standards to AWS, including AWS DevOps pipelines, CI/CD automation, and infrastructure managed through Terraform. I also work with Google Cloud Platform for teams running workloads across multiple providers.
AI Automation is a growing part of what I do. As more teams start integrating AI into their products and workflows, I help them connect those AI components to production infrastructure properly, with reliable pipelines, automated testing, and deployment flows that treat AI workloads the same way as any other service.
I also collaborate closely with full stack developer teams to improve release processes, deployment reliability, and infrastructure scalability, making sure the gap between development and operations is as small as possible.
What clients usually need help with:
✔ Stabilizing Azure DevOps pipelines and deployment workflows
✔ Building scalable Kubernetes infrastructure
✔ Migrating legacy infrastructure to Microsoft Azure
✔ Reducing cloud costs and improving DevOps efficiency
✔ Designing secure Cloud Architecture for growing products
✔ Automating deployments with Terraform and CI/CD
✔ Improving monitoring, security, and infrastructure reliability
✔ Implementing AI Automation into existing delivery workflows
The full technology range I work with includes: Azure DevOps, Microsoft Azure, Amazon Web Services, Google Cloud Platform, Kubernetes, Docker, Terraform, Ansible, CI/CD, Git, SQL, Python, Linux, Windows Server, Azure Data Factory, Azure Blockchain Service, Cloud Architecture, Deployment Automation, Network Security, and more.
Certifications:
✅ 7x Microsoft Azure Certified
✅ Kubernetes Certified
✅ Terraform Certified
If your infrastructure needs structure, your pipelines need reliability, or your cloud costs are climbing without clear control, send me a message here on Upwork. Describe the situation and I will come back with a clear breakdown and concrete next steps.
Microsoft Azure
Amazon Web Services
DevOps
CI/CD
Kubernetes
Terraform
Azure DevOps
Cloud Computing
Azure Blockchain Service
Linux
Docker
SQL
Git
Ansible
Python
Windows Server
Google Cloud Platform
Deployment Automation
Network Security
Cloud Architecture
Mikolaj M.
Poznan, Poland
$50/hr
4.9
16 jobs
IT professional focused on building highly available, resilient and resistant applications.
To achieve this I mostly use VMware and Microsoft technology. Specializing in Microsoft technology and vSphere environment. Proficient in Veeam, especially implementing and managing backup policies for such applications.
Currently broadening my knowledge of public (Azure) and hybrid cloud (Azure Stack + Azure and VMware + Azure)
VMware Administration
Microsoft Exchange Server
Windows Server
Veeam
Skype For Business
Backup & Migration
Backup Administration
Server & Virtualization Software
Storage Area Network
Microsoft Hyper-V Server
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