Andrii Derkach

eCommerce Product – Cross-Border Retail Platform
Architected and delivered a scalable platform enabling retailers to expand globally, addressing complex currency, tax, and localization challenges. Ensured business value flows across domains through cross-domain synchronization and event-driven design.
Key Contributions:

• Designed application architecture with microservices and reusable templates, ensuring scalability and maintainability.
• Led full SDLC delivery: analysis, design, implementation, testing, documentation, and support.
• Introduced cross-domain synchronization patterns to ensure data consistency and efficient end-to-end processes.
• Mentored engineers to raise team capabilities and promote clean code and DevOps best practices.
• Collaborated with PMs and POs to translate complex business requirements into actionable solutions.

Technologies: .NET/C#, Kafka, ASP.NET WebAPI, Angular, TypeScript, xUnit, Moq, Microsoft Azure (DevOps, App Services, AKS, Application Insights, CosmosDB, Dashboards)
Architectures & Practices: Microservices, DDD, Event-Driven Architecture, CQRS, UML

Led end-to-end development of multiple mid-sized products, driving full-cycle delivery from requirements to architecture, CI/CD, and support. Ensured scalable, reliable solutions using modern frameworks and engineering best practices.
Key Contributions:

• Architected and developed core system functionality and established reusable patterns to accelerate development.
• Introduced new technologies (e.g., .NET Core, MS Orleans, Elasticsearch, Azure) to enhance performance and team productivity.
• Guided cross-functional collaboration with customers, PMs, and BAs to align solutions with business goals.
• Led and coordinated distributed engineering teams (up to 15 people), providing mentoring and technical direction.
• Set up and optimized CI/CD pipelines, improving release quality and reducing time-to-market.

Technologies: .NET Framework/Core, C#, ASP.NET WebAPI, ReactJS, Redux, Microsoft Azure, MS Orleans, Elasticsearch, MS SQL Server, MongoDB, xUnit, NUnit, NSubstitute, Moq
Tools: DotTrace, DotMemory, ReSharper, GitHub, GitLab, TeamCity
Architectures & Practices: Microservices, DDD, CQRS, UML

Contributed to large-scale CRM and BPM systems, ensuring performance, scalability, and maintainability in high-demand enterprise environments.
Key Contributions:

• Designed and implemented core application modules and databases, delivering reliable functionality.
• Optimized system performance through profiling and targeted improvements, ensuring high availability.
• Participated in all SDLC phases, from analysis to deployment and support.
• Led a local development team, providing technical direction and mentoring.

Technologies: .NET Framework 4.5/4.6, C#, ASP.NET Web Forms, JavaScript, jQuery, RequireJS, WCF, MS SQL Server, Oracle, Redis
Tools & Practices: NUnit, Moq, jMeter, UML, SVN, LDAP, Quartz Scheduler, DotTrace, DotMemory, Performance Monitor

Developed web application using .NET C#, ASP.NET Web Forms, and JavaScript. Managed MS SQL Server 2005/2008 to ensure optimal database performance.

Engineered desktop applications utilising .NET, ASP.NET Web Forms, and managed MS SQL Server.