Сергій

SERHII SHAPKA (SENIOR .NET SOFTWARE ENGINEER)
Location: Ukraine
E-Mail: [открыть контакты](см. выше в блоке «контактная информация»)
Phone: [открыть контакты](см. выше в блоке «контактная информация»)
SUMMARY

Senior .NET Backend Engineer with 10+ years of experience building scalable distributed systems, enterprise
applications, and data-intensive platforms. Strong expertise in C#, ASP.NET Core, DDD, CQRS, messaging, and cloud-
based architecture. Skilled in improving existing systems, leading technical decisions, mentoring engineers, and
driving clean architectural practices. Experience in healthcare, manufacturing, e-commerce, and engineering
domains with focus on reliability, maintainability, and performance.

LANGUAGES AND TECHNOLOGIES

Languages & Frameworks: C#, .NET 10, ASP.NET Core WebAPI/MVC, .NET Framework, EF Core
Architecture & Patterns: DDD, CQRS/CQS, Microservices, Clean Architecture, SOLID
Messaging & Integration: RabbitMQ, Azure Service Bus, MassTransit
Databases: MS SQL Server, PostgreSQL
Testing & Quality: NUnit, Moq, Integration Testing
DevOps & Tools: Docker, Kubernetes, Git, GitHub Actions, Swagger
Cloud: Azure App Service, Azure Functions, Azure Blob Storage, Azure Key Vault, Entra ID
Methodology: Agile, Scrum, SAFe, Kanban
Soft Skills: Cross-team collaboration, requirements clarification, mentoring, technical leadership

EXPERIENCE

Senior Backend-Software Engineer 06/2025 – present (9 months)
Preux Software
Healthcare — Cryo-material preservation platform

• Designed, built, and owned core backend services in a microservices architecture, improving patient
onboarding workflows, optimizing laboratory inventory management, and increasing efficiency and
sustainability across transportation processes.
• Contributed to customer payments and billing systems, ensuring reliable and compliant financial processing.
Improved domain reliability by redesigning core workflows and implementing unified audit logging to track
possible unwilling changes in system and roll back them.
• Participated in technical grooming, estimations, and architecture discussions.
• Reviewed code, mentored developers on clean code and DDD practices, and contributed to improving team
development standards.
 Technologies/environment: C#, .NET 10, ASP.NET Core WebAPI, Clean Architecture, PostgreSQL, Entity
Framework Core, Docker, Kubernetes, Azure App Service, Azure Blob Storage, Azure Functions, Azure Service
Bus, RabbitMQ, MassTransit, Auth0, Stripe, CQRS, MediatR, DDD, NUnit, Moq.

Senior Backend-Software Engineer 02/2025 – 05/2025 (3 months)
DXC Luxoft
Industrial Manufacturing — Inspection & quality control system

• Designed and implemented a robust quality inspection module for an industrial manufacturer, reducing
manual validation time.
• Ensured high code reliability by writing comprehensive unit and integration tests using NUnit and Moq.
• Collaborated closely with QA and stakeholders to refine requirements and validate solutions.
• Participated actively in code reviews and pull request evaluations.

Technologies/environment: C#, .NET 8, ASP.NET Core WebAPI, MS SQL Server, Micriservices, Entity Framework
Core, Docker, Kubernetes, Swagger, Azure AD, Azure Key Vault, CQS, RabbitMQ, NUnit, Moq, Git, Azure DevOps,
Scrum.

Lead Senior Full-Stack-Software Engineer 01/2024 – 02/2025 (1 year 2 months)
Kenner Soft Service GmbH
E-commerce platform / CMS development

• Led the design and implementation of a CMS for an e-commerce platform with full lifecycle development
from scratch to production.
• Gathered business requirements directly from clients and tailored solutions to user needs.
• Implemented advanced filtering and search features to optimize product browsing.
• Unified all media data from diverse sources into single S3 storage to reduce cost expenses.
• Implemented EDI conversion for different formats of files to unify document exchange.
• Accelerated release cycles by implementing CI/CD pipelines.

Technologies/environment: C#, .NET Framework Core, ASP.NET Core MVC, Javascript, JQuery, Bootstrap, MS SQL
Server, Redis, MS Entra ID, S3, MinIO, Entity Framework Core, Git, Azure DevOps.

Senior Software Engineer 07/2018 – 07/2023 (5 years)
AMC Bridge
Enterprise toolset for PLM system

• Maintained and enhanced a suite of 20+ enterprise utilities and tools.
• Developed a WPF diagnostic application and VSIX extensions for UI testing to reduce core development
teams efforts on troubleshooting.
• Created and maintained console applications for upgrading enterprise software versions to avoid manual
work.
• Wrote comprehensive test suites including UI, unit, and integration testing.

Technologies/environment: C#, WPF, .NET Framework /.NET Core, NUnit, TestComplete, Visual Studio API, XML,
JSON, PowerShell, SQL, MS SQL, Roslyn, Visual Studio, Git, Bitbucket.
 Software Engineer 01/2016 – 01/2018 (2 years)
Effective Solutions
IaaS Platform Development

• Designed the database and control panel interface for an Infrastructure-as-a-Service (IaaS) solution.
• Developed a Windows service for payment aggregation and processing.
• Led unit and UI test development, bug fixing, and refactoring efforts.
• Involved in project estimation, backlog grooming, and deployment pipelines.

Technologies/environment: C#, .NET framework, Windows Services, ASP.NET MVC Framework, ASP.NET Web API, Entity
Framework, Visual Studio, MS SQL Server.

EDUCATION

Sumy State University, Ukraine
MSc in Applied Mathematics - 2015
BSc in Applied Mathematics – 2014

CERTIFICATIONS

Microsoft Certified: Azure Developer Associate (AZ-204)
Microsoft Certified: Azure Fundamentals (AZ-900)

LANGUAGES

English – Full Professional Proficiency (C1)
Ukrainian – Native