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Hi, I'm Serhii
I'm a Senior Front-End Developer and Team Lead with over 14 years of experience in IT, including 6+ years in front-end development and 3+ years in leadership roles. I'm passionate about building robust, scalable web applications and leading teams toward delivering high-quality software. My core strengths lie in Vue.js, Angular, Pinia, and Docker, along with a strong foundation in testing and system support.
Personal Information
- Serhii Kholodnyi
- Tallinn, Estonia
- +372 5190 0494
- serg.holodny@gmail.com
- linkedin.com/in/serhii-kholodnyi
Languages
- EnglishC1
- UkrainianC2
- RussianC2
- SpanishB1
- GermanA1
Hard Skills
JavaScript86%
TypeScript80%
Angular80%
HTML90%
CSS76%
React65%
Vue.js55%
Java50%
Skills
- RxJs
- NgRx
- NgXs
- Nx
- Jest
- Jasmine + Karma
- Chai + Mocha
- Docker
- Kubernetes
- Cypress
- Protractor
Work Experience
November 2021 - Present
November 2021 - Present
TurnKey Labs
Senior Frontend Developer / 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
September 2018 - November 2021
September 2018 - November 2021
DataArt
Senior Frontend Developer / Team Lead
- •Frontend architecture design and implementation
- •Leading cross-functional frontend teams
- •Integrating with RESTful APIs and backend services
- •Code quality control, test automation
September 2017 - September 2018
September 2017 - September 2018
DataArt
Middle Frontend Developer / Team Lead
- •Built and maintained client-side components
- •Managed small team and sprint planning
- •Participated in product decision-making and UI optimization
January 2017 - September 2017
January 2017 - September 2017
EOS Data Analytics (EOSDA)
Middle Frontend Developer
- •Developed and maintained multiple GIS-related frontend apps
- •Wrote unit and end-to-end tests
- •Performed code reviews and acted as Scrum Master
July 2014 - January 2017
July 2014 - January 2017
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
July 2013 - July 2014
July 2013 - July 2014
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
2006 - 2011
2006 - 2011
Zaporizhzhya National Technical University
Master's degree
INFORMATIONAL COMMUNICATION NETWORKS
2008 - 2011
2008 - 2011
Zaporizhzhya National Technical University
Bachelor's degree
TECHNICAL TRANSLATION (ENGLISH)
Domain Expertise
Finance
Insurance
Healthcare
Social Networks
Education
SEO
Computer Networks