Kozlianskyi Kostiantyn

Full-stack developer .NET + Angular

Chernihiv / Kyiv,
Ukraine flagUKRAINE
+38(068)067-73-38
6kostya@gmail.com
linkedin.com/in/unsky559 t.me/unsky559

Ukraine flag I'm a full-stack developer focused on building high-performance single-page applications using Angular, TypeScript, SCSS, and .NET-based RESTful APIs. I have hands-on experience in creating responsive, cross-browser interfaces and working with microservice architectures. I’m proactive in improving development workflows, integrating CI/CD pipelines, and automating deployment processes.

Work experience

Full-stack .NET + Angular developer

BlackNova

About

Development of a smart home management system for hotel infrastructure as part of the BlackNova team. The platform is based on a microservices architecture. I contribute to both the frontend in Angular and backend REST-full API in .NET. I also contribute to services written in C and Python. I’ve taken the initiative to improve the development workflow by integrating a CI/CD pipeline using Jenkins, and actively contribute to optimizing and automating deployment and versioning processes.

Achievements

  • Integrated a full CI/CD pipeline on a Jenkins server, significantly accelerating team development and delivery processes.
  • Introduced a service versioning system, enabling clearer tracking of the current state of all deployed services.
  • Developed a set of .bat deployment automation scripts for physical devices, reducing daily testing and debugging time by over 40 minutes.
  • Developed a library of reusable Angular components that made it easier to develop and prototype new projects.
  • Implemented unit and integration testing, helping to prevent regressions and errors when developing new features or fixing bugs.

C# developer

KPI University

About

Development of a software package for the research and generation of electromagnetic signals and their propagation in the aquatic medium. I am committed to implementing algorithms and complex math equations in C# in optimal way, as well as developing the user interface with WPF.

Achievements

  • Implemented the debounce function for building a trajectory and drawing graphs, which reduced the UI response time in the application by x10 times.
  • Introduced commit and pull requests naming convention, which speed up development.
  • Suggested to start using Jira as a task tracker, which helped to reduce confusion in current and future tasks.

Full-stack developer

SushiClub

About

Development of an online ordering platform for a sushi studio. Built the frontend in Angular and an admin system for staff and order management. Integrated LiqPay payments, receipt printing, and a Telegram bot for instant order notifications. Created a courier client for real-time order tracking. Backend implemented as PHP REST API with MariaDB using RedBeanPHP.

Achievements

  • 72% of all orders were processed directly through the website.
  • 38% of first-time customers returned for repeat orders.
  • Average order processing time reduced by 25% compared to manual handling.

Education

College of Transport and Computer Technology of Chernihiv Polytechnic National University

Junior specialist diploma; Electric power, electrical engineering and electromechanics.

National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”

Bachelor's degree diploma; Faculty of electronics, micro- nano system technology.