Особисті дані приховані

KRYSTYNA KORYAGINA
Frontend Developer
[відкрити контакти](див. вище в блоці «контактна інформація»)
[відкрити контакти](див. вище в блоці «контактна інформація»)
[відкрити контакти](див. вище в блоці «контактна інформація»)
https://github.com/KrystynaKoryagina
Turkey, Antalya

ABOUT ME

Highly skilled and motivated Web Developer with about 5 years of professional experience in building dynamic and responsive web
applications using React and Angular. Possesses a strong foundation in HTML5, CSS3, JavaScript, and TypeScript, and hands-on experience
in developing backend services with Node.js and NestJS, including REST APIs, authentication, and database integrations.

EDUCATION

MASTER’S DEGREE
2006-2011
Kharkiv Institute of Trade and Economics
FRONTEND DEVELOPER 2018
EasyCode IT School

SKILLS

HTML5, CSS3, SCSS Node.js, Express, NestJs
JavaScript, TypeScript PostgreSQL, MongoDB
Angular, React, Next.Js, RxJs TypeORM
Redux, RTK / RTK Query, React Query (TanStack Query) SQL
REST API, GraphQL, Apollo GraphQL, Socket.io Microservice architecture
Tailwind, Material UI, Bootstrap NATS
Jest, React Testing Library, Cypress Docker
Webpack, Vite, Gulp
ESLint, Prettier, Storybook
Feature-Slices Design

LANGUAGES

Russian
Ukrainian
English

WORK EXPERIENCE

Time-tracking solutions for truck drivers.
Frontend developer, TrackEnsure Inc. September, 2025 - Present
Tools and technologies:
Angular 2+, Angular JS, Typescript, RxJS, Angular Material, Leaflet/Maplibre/Google maps
Developed and maintained complex frontend features using Angular, ensuring a responsive and user-friendly interface
Integrated external services and APIs, including mapping, geolocation, and tracking solutions
Worked extensively with interactive maps (Leaflet, MapLibre, Google Maps) for real-time data visualization
Refactored legacy frontend code, significantly improving application stability, performance, and maintainability
Collaborated with backend and product teams to ensure smooth data flow and consistent API integration
Identified and resolved frontend performance issues and bugs, improving overall user experience

Medical SaaS Platform for Radiologists
FullStack developer, ABCLOUDZ October, 2024 - September, 2025

Tools and technologies:
NestJS, Microservice Architecture, NATS, TypeORM, SQL, PostgreSQL, Socket.io, Docker, React, Redux, Redux Saga, TanStack
Integrated external services
Refactored legacy code, significantly boosting system stability and maintainability
Designed, developed, and maintained PostgreSQL databases using TypeORM, focusing on data integrity and performance optimization
Wrote and optimized advanced SQL queries for complex data processing
Built and improved production-ready RESTful APIs to ensure reliability and scalability.
Identified performance bottlenecks, fixed bugs, and optimized queries to enhance overall backend efficiency

Enterprise solution for PC fleet management, remote firmware administration and incident resolution
Angular developer, NIX Tech. June 2020 — March 2022, November 2023 — May 2024

Tools and technologies:
Angular, Typescript, RxJS, Angular Material, Rest API, Akita State Management, Elf, Jasmine, Jest, StoryBook, Highcharts.js
Developed an enterprise-level solution to manage and maintain large PC fleets, remote firmware updates, and incident resolution
Migrated the platform to a micro frontend architecture
Designed and maintained a custom UI library using atomic design methodology
Implemented interactive dashboards and health monitoring graphs
Ensured full accessibility compliance and wrote unit tests
Actively participated in the code review process

Video Creation App from text and podcasts
React developer, NIX Tech. March 2022 - November 2023

Tools and technologies:
Next.JS, Redux Toolkit, Typescript, GraphQL, Apollo GraphQL, Jest
Developed single-page application using React and Feature-Sliced Design architectural methodology.
Wrote unit tests using the Jest framework.
Implemented GraphQL APIs to connect the application to the backend services.
Actively participated in the code review process.
Conducted systematic refactoring of legacy code to improve readability, maintainability, and performance