Sergey Kazantsev

A business-focused and motivated software engineer with 10+ years of experience.

I specialize in web services, asynchronous messaging, web development and domain-driven design.

• Implemented and launched a service for planning medical appointments.
• Led the implementation of the feature flag management app in a group of engineers from the idea to successful launch.
• Created technical design documents for a few services and led their implementation in a team of 5 engineers.
• Led the adoption of the industry's best practices in a team: continuous integration, continuous delivery, feature flags, technical debt management, vertical slicing.
• Created libraries for communication between microservices via HTTP and messaging (Rabbit MQ) and guided their adoption in different teams by giving presentations and sharing knowledge.

C#, TypeScript, SQL, MongoDB, RabbitMQ, Elasticsearch, Docker, CQRS

• Architectured and led the implementation of a message-driven backend (10+ services) for processing video/audio data from the internal network of 2000+ TV channels.
• Implemented an algorithm for extracting ads from video/audio streams.
• Created test suites of integration and end-to-end tests covering core use cases.
• Implemented pipelines for one-click build and deployment.
• Conducted technical interviews.

C#, TypeScript, SQL, RabbitMQ, Redis, Docker, Python, scalability

• Served as a technical leader for a team of 10 engineers developing and maintaining a website with 20 million registered accounts. Responsible for technical vision, task decomposition and mentoring engineers.
• Driving the adoption of industry's best practices: continuous integration, continuous delivery, technical debt management.
• Improved application reliability by implementing health checks, integrating with monitoring tools and creating documentation for ops engineers.
• Conducted technical interviews.

C#, JavaScript, SQL, PowerShell, TeamCity, Octopus Deploy, scalability, automation

• Implemented and launched profile management and license management features for a new website for users of Kaspersky products. The product was in development for 1.5 years and was launched on schedule.
• Introduced a practice of managing dependencies via package managers.

C#, JavaScript, SQL, asynchronous messaging, scalability

• Assisted in development of web and desktop applications for various customers using the .NET stack.
• Created a mobile web application.

C#, Javascript, HTML5/CSS

Asynchronous cross-platform WebDAV client for .NET Standard.