Serhii pasternak
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Serhii pasternak

Serhii pasternak

About

Detail

developer
Ukraine
Contact Serhii regarding: 
work
Full-time jobs
Starting at USD20/hour
Flexible work
Starting at USD20/hour
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Finding candidates
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Finding mentors

Timeline

work
Job
school
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Project (professional or personal)

Résumé

Jobs verified_user 0% verified
  • CoachCare
    Freelancer
    CoachCare
    May 2020 - Current (5 years 8 months)
  • W
    Software Engineer
    Waze
    Mar 2020 - Nov 2020 (9 months)
    Worked on a large-scale web application using React and Node.js resultingina 20% increase in user satisfaction.Developed and maintained back-end services using Express.jsand MongoDB resulting in a 30% reduction in downtime. • Optimized database queries using MongoDB aggregation resulting in a 40% reduction in downtime. • Implemented client-side validations and error handling to enhance the user experience. • Collaborated with cross-functional teams to gather requirements and deliver high-quality software solutions.
  • 北
    Junior Front-End Developer
    北京理工大学北京理工大学
    Feb 2019 - Jul 2019 (6 months)
    Worked on the development of a browser-based application using React and Redux resultingina 14% increase in user engagement. Improved application performance by optimizing REST API callsand reducing load times resultingina 15% increase in page speed. • Implemented unit tests using Jest and React Testing Library to ensure code quality and improve test coverage. • Optimized REST API calls to reduce load times resulting in a 12% increase in page speed. • Improved store management and side effects for the application using Redux thunk and saga.
Education verified_user 100% verified
  • CoachCare
    Computer Science verified_user Verified experience public Remote experience
    CoachCare
    Dec 2011 - Dec 2015 (4 years 1 month)
Projects (professional or personal) verified_user 0% verified
  • F
    Freelancer
    May 2022 - Current (3 years 8 months)
  • CoachCare
    Logo design
    CoachCare
    May 2017 - Aug 2019 (2 years 4 months)
  • CoachCare
    Car site
    CoachCare
    May 2016 - Current (9 years 8 months)