10/25/2026 updated

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Enterprise Solution Architect | Cloud Architect (Azure & AWS) | Full Stack .NET | Angular | React

Warsaw, Poland
Worldwide
Bachelor of Applied Science (B.A.Sc.), Applied Mathematics
Warsaw, Poland
Worldwide
Bachelor of Applied Science (B.A.Sc.), Applied Mathematics

Profile attachments

Leonid_Oleksiuk_CV_2026.pdf

About me

Solution Architect and Engineering Manager with 10+ years of experience designing scalable enterprise systems, leading development teams, and delivering cloud-native solutions on Azure and AWS. Expertise in distributed systems, software architecture, and digital transformation.

AI AgentsAzure DevOpsSAP CloudASP.NET.NET FrameworkAmazon Elastic Compute CloudASP.NET MVC FrameworkMicrosoft AzureC Sharp (Programming Language)Client Server ModelsCloud ComputingCloud EngineeringApache CloudStackData ArchitectureDevOpsEnterprise Architecture FrameworkHigh-Level ArchitectureEnterprise VaultAzure SQL.NET Framework 4Software ArchitectureRabbitMQCloud ServicesScaled Agile FrameworkSun Certified Enterprise Architect (SCEA)Service-Oriented ArchitectureSolution ArchitectureSystems ArchitectureSystems DesignAzure Service BusEnterprise Application SoftwareEnterprise Application PlatformCloud Platform System.NET CoreEvent-driven ArchitectureReact.jsIT ArchitectureAsp.net Web ApiCloud TechnologiesBackendAWS ECSCloudformationEvent Driven ArchitectureKubernetesFull Stack DevelopmentAWS Data AnalyticsAsp.net Web Forms3-tier ArchitecturesTerraformASP.NET ApplicationsAWS EKS
Experienced Solution Architect, Engineering Manager, and Technical Lead with 10+ years of experience delivering enterprise-grade software solutions across multiple industries.
Specialized in designing scalable architectures, leading engineering teams, driving cloud transformation initiatives, and building high-performance products from concept to production. Proven track record of establishing engineering processes, scaling development teams, modernizing legacy platforms, and delivering complex distributed systems aligned with business objectives.
Architecture & Leadership
  1. Enterprise Solution Architecture
  2. Software Architecture & System Design
  3. Cloud-Native Architecture
  4. Microservices Architecture
  5. Event-Driven Architecture
  6. Distributed Systems
  7. Technical Strategy & Roadmaps
  8. Engineering Management
  9. Team Leadership & Mentoring
  10. Agile Delivery Management
  11. Software Development Lifecycle (SDLC)
  12. Architecture Reviews & Governance
Backend
  1. C#
  2. .NET Framework
  3. .NET Core / .NET 5–9
  4. ASP.NET MVC
  5. ASP.NET Core
  6. Web API
  7. Entity Framework
  8. Entity Framework Core
  9. SignalR
  10. gRPC
  11. REST APIs
  12. GraphQL
Frontend
  1. Angular
  2. React
  3. React Native
  4. Vue.js
  5. TypeScript
  6. JavaScript
  7. RxJS
  8. NgRx
  9. Redux
  10. PrimeNG
  11. Angular Material
  12. HTML5
  13. CSS3
Mobile
  1. .NET MAUI
  2. Xamarin
  3. React Native
  4. Progressive Web Apps (PWA)
Cloud & DevOps
  1. Microsoft Azure
  2. Azure App Services
  3. Azure Functions
  4. Azure Service Bus
  5. Azure SQL
  6. Azure Storage
  7. AWS
  8. EC2
  9. ECS
  10. Lambda
  11. S3
  12. CloudFormation
  13. Docker
  14. Kubernetes
  15. Terraform
  16. Azure DevOps
  17. GitHub Actions
  18. GitLab CI/CD
  19. Jenkins
Databases & Data Platforms
  1. Microsoft SQL Server
  2. PostgreSQL
  3. MySQL
  4. MongoDB
  5. Redis
  6. Elasticsearch
Testing & Quality
  1. xUnit
  2. NUnit
  3. Moq
  4. Pact
  5. Cypress
  6. Jasmine
  7. Karma
  8. Mocha
Passionate about building scalable, secure, and maintainable software solutions while helping organizations establish strong engineering cultures, optimize development processes, and accelerate product delivery.

Experience

Professional experience10+ years
Freelancer since2020

Languages

EnglishFluent

Project history

Principal Architect

Stellar Logic

Internet & IT

10-50 team member

• Leading architecture design and development of scalable cloud-native enterprise solutions
• Defining technical strategy, ensuring best practices in system design and implementation
• Mentoring engineering teams, supporting project planning and execution
• Collaborating with clients to transform business needs into robust technical solutions
• Driving innovation by adopting modern tools, frameworks, and cloud services

Lead Full-Stack Engineer

EPAM Systems

Internet & IT

>10.000 team member

• Led a team of developers, analysts, and QA for an audit project
• Managed a microservice-based system hosted on AWS, responsible for ingesting large volumes of data
• Handled back-end and front-end development, DevOps tasks, and system architecture
• Communicated with customers, negotiated requirements, managed releases, and resource planning
• Designed and developed new features and data ingestion processes

Full-Stack Engineer

Devox Software

Internet & IT

10-50 team member

• Developed a site constructor system with microservice architecture
• Responsible for backend/frontend development, customer communication, and feature implementation
• Configured CI/CD pipelines and mentored junior developers

Full-Stack Engineer

Breeze-Soft

Internet & IT

50-250 team member

• Developed a casino management system handling 100+ requests/sec and 1M+ concurrent users
• Participated in backend/frontend development, architecture decisions, and performance optimization
• Configured CI/CD pipelines, mentored junior developers, and planned tasks

Full-Stack Engineer

TSI

Internet & IT

250-500 team member

• Worked on bpm’online CRM deployment projects
• Managed databases, customized CRM solutions, and deployed systems on client side

Web Tools & Extensions Engineer

Auxoft

Internet & IT

10-50 team member

• Developed a password management system for iOS/macOS with browser extension
• Built Chrome/Safari extensions for secure password transfer via encrypted Bluetooth
• Developed testing tools for browser extensions

Certificates

Associate Cloud Engineer

Google

2021

Microsoft Certified: Azure Administrator Associate

Microsoft

2021


Portfolio


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