Hi, I'm Serhii
Welcome to my playground! I'm a Senior Frontend Engineer and Team Lead with a background spanning technical support, QA, and frontend engineering. That journey gave me a broad perspective on software development, allowing me to think beyond implementation and focus on quality, maintainability, and user experience.
My primary expertise is the Angular ecosystem, where I enjoy designing scalable architectures, improving performance, and modernizing large applications. I'm also experienced with React, Vue.js, Node.js, and the broader web platform, enabling me to contribute across the full product stack when needed.
Beyond engineering, I enjoy building teams, mentoring developers, and solving complex technical challenges. I'm at my best when creating products that are both technically robust and enjoyable to use.
Personal Information
- Serhii Kholodnyi
- Barcelona, Spain
- serg.holodny@gmail.com
- linkedin.com/in/serhii-kholodnyi
Languages
- EnglishC1
- UkrainianC2
- RussianC2
- SpanishB1
- GermanA1
Hard Skills
Skills
- RxJs
- NgRx
- NgXs
- Nx
- Storybook
- Tailwind CSS
- Redux
- Node.js
- Next.js
- NestJS
- Express.js
- Jest
- Jasmine + Karma
- Chai + Mocha
- Progressive Web Applications (PWA)
- Angular Material
- PrimeNG
- NG-ZORRO
- Webpack
- Leaflet
- Git
- Docker
- Kubernetes
- Cypress
- Playwright
- Selenium
- Appium
Work Experience
TurnKey Labs
Senior Frontend Engineer / Team Lead
- •Leading a frontend team on multiple client-facing projects
- •Designing scalable frontend architecture
- •Performing code reviews, mentoring developers
- •Coordinating closely with designers and product managers
DataArt
Senior Frontend Engineer / Team Lead
- •Frontend architecture design and implementation
- •Leading cross-functional frontend teams
- •Integrating with RESTful APIs and backend services
- •Code quality control, test automation
DataArt
Frontend Engineer / Team Lead
- •Built and maintained client-side components
- •Managed small team and sprint planning
- •Participated in product decision-making and UI optimization
EOS Data Analytics (EOSDA)
Frontend Engineer
- •Developed and maintained multiple GIS-related frontend apps
- •Wrote unit and end-to-end tests
- •Performed code reviews and acted as Scrum Master
Ciklum
Quality Assurance Automation Engineer
- •Created E2E and API tests (Protractor, Appium, Java, Selenium)
- •Migrated codebases from ES5 → ES6 → TypeScript
- •Managed CI/CD pipelines, led QA teams, participated in BDD adoption
- •Developed iOS UI tests using Swift & Xcode UI Test
Cupid plc
Quality Assurance Engineer
- •QA for multiple dating platforms (web, mobile, social widgets)
- •Focused on payment system integrations and UI/UX testing
- •Developed automation test suites using Selenium
- •Mentored junior QA engineers
Education
Zaporizhzhya National Technical University
Master's degree
INFORMATIONAL COMMUNICATION NETWORKS
Zaporizhzhya National Technical University
Bachelor's degree
TECHNICAL TRANSLATION (ENGLISH)