Kozlianskyi Kostiantyn

Full-stack Developer .NET + Angular

Kyiv,
Ukraine flagUKRAINE
6kostya@gmail.com
linkedin.com/in/unsky559
t.me/unsky559

Ukraine flag I'm a Full-Stack Developer with over years of experience, focused on building high-performance single-page applications using .NET-based RESTful APIs and Angular, TypeScript, SCSS. I have hands-on experience in creating responsive, cross-browser interfaces and working with microservice architectures. I'm proactive in improving development workflows, automation, and cross-team collaboration, with experience working in production environments that require strict deadlines and quality control.

Work Experience

Full-stack .NET + Angular Developer

BlackNova

About

Domain: Hardware / IoT.

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 RESTful API in .NET with SQLite database. I also contribute to microservices written in 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 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.
  • Mentored other developers in adopting best practices and encouraged a culture of continuous learning within the team.

C# Developer

China Machinery Investment Group
via AED KPI University

About

Domain: Utilities / Data Processing.

Development of a software package for the research and generation of electromagnetic signals and their propagation in the aquatic medium. I implemented algorithms and complex mathematical equations in C# in an optimal way, and developed the user interface with WPF.

Achievements

  • Collaborated closely with researchers and team members to translate complex technical requirements into practical software solutions, ensuring alignment with project goals.
  • Implemented the debounce function for building a trajectory and drawing graphs, which reduced the UI response time in the application by x10 times.
  • Implemented Jira as the primary task tracker, improving team alignment and reducing ambiguity in task ownership.

Full-Stack Developer PHP + Angular

SushiClub

About

Domain: CRM & E-commerce.

Development of an online ordering platform for a sushi studio. Built the customer-facing frontend in Angular with Styled Components, featuring a responsive product catalog, shopping cart with real-time updates, and seamless checkout flow. Developed an admin system in Angular 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. The backend was implemented as a PHP REST API with MS SQL Server 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.
  • Facilitated communication between technical and non-technical stakeholders, ensuring clear understanding of requirements and efficient feature delivery.
  • Coordinated tasks effectively to meet tight deadlines.

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.