Jaroslav Krejci

Senior Specialist of Access Network Research and Development at Česká telekomunikační infrastruktura
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Contact Information
us****@****om
(386) 825-5501
Location
Prague, Czechia, CZ
Languages
  • English Professional working proficiency
  • Czech Native or bilingual proficiency
Skills

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Credentials

  • Pandas
    Kaggle
    Dec, 2021
    - Nov, 2024
  • Intermediate Machine Learning
    Kaggle
    Nov, 2021
    - Nov, 2024
  • Python Data Science Toolbox (Part 1)
    DataCamp
    Mar, 2019
    - Nov, 2024
  • Introduction to Python Course
    DataCamp
    Jan, 2018
    - Nov, 2024
  • PRINCE2® Foundation Certificate in Project Management
    PEOPLECERT
    Jun, 2016
    - Nov, 2024
  • ITIL® Foundation Certificate in IT Service Management
    PEOPLECERT
    Sep, 2015
    - Nov, 2024
  • Elements of AI
    University of Helsinki

Experience

  • CETIN
    • Czechia
    • Telecommunications
    • 700 & Above Employee
    • Senior Specialist of Access Network Research and Development
      • Jan 2017 - Present

      - Developing automation tests for testing GPON, XGS-PON, xDSL technology (SQL, Python - Pandas, Numpy, Openpyxl)- R&D GPON and XGS-PON technology OLT/ONU (ZTE, Huawei, Adtran, Comtrend, ZyXel)- R&D xDSL technology DSLAM/CPE (Nokia, Huawei, Comtrend, ZyXel)- Monitoring subscriber lines in the access network - performance reports and statistics, data analysis-- Negotiation with suppliers and solving issues - Responsible for documentation and definition of test procedures

    • Specialist of Access Network Research and Development
      • Jun 2015 - Dec 2016

      - R&D xDSL technology DSLAM/CPE (Nokia, Huawei, Comtrend, ZyXel)- Developing automation tests for testing xDSL technology (Bash, Tcl/Tk, Excel - macros)- Negotiation with suppliers and solving issues- Monitoring subscriber lines availability and performance- Supervisor of Internships students

  • O2 Czech Republic
    • Czechia
    • Telecommunications
    • 700 & Above Employee
    • Specialist of Network Infrastructure
      • Sep 2012 - May 2015

      - Testing xDSL technology DSLAM/CPE (Alcatel, Huawei, Comtrend, ZyXel) - Developing automation tests for testing xDSL technology (Bash, Tcl/Tk, Excel - macros) - Negotiation with suppliers and solving issues - Data analysis of subscriber lines databases - Testing xDSL technology DSLAM/CPE (Alcatel, Huawei, Comtrend, ZyXel) - Developing automation tests for testing xDSL technology (Bash, Tcl/Tk, Excel - macros) - Negotiation with suppliers and solving issues - Data analysis of subscriber lines databases

  • Vums Datacom, O2 Czech Republic a.s.
    • Prague, The Capital, Czech Republic
    • Specialist in Data Laboratory
      • Apr 2011 - Aug 2012

      - Testing xDSL technology DSLAM/CPE (Alcatel, Huawei, Comtrend, ZyXel) - Negotiation with suppliers and solving issues - Testing xDSL technology DSLAM/CPE (Alcatel, Huawei, Comtrend, ZyXel) - Negotiation with suppliers and solving issues

  • Department of Telecommunication Engineering, Faculty of Electrical Engineering, CTU in Prague
    • Prague, The Capital, Czech Republic
    • Ph.D. Candidate
      • Mar 2007 - Feb 2011

      - Innovations of scientific field for the purpose of technological improvement - Solving and managing grants - Preparation of learning materials - Teaching in university lecture courses - Participation and presentation on international conferences and workshops - Publishing in international journals - Supervisor of diploma and bachelor theses - Innovations of scientific field for the purpose of technological improvement - Solving and managing grants - Preparation of learning materials - Teaching in university lecture courses - Participation and presentation on international conferences and workshops - Publishing in international journals - Supervisor of diploma and bachelor theses

  • T-Mobile Czech Republic a.s.
    • Telecommunications
    • 700 & Above Employee
    • Project MIATT (Mobile Internet Access Testing Tool)
      • 2005 - 2008

      - Performance tests (Bash) and Web presentation (PHP & MySQL) - Quality of services on mobile network (T-Mobile, Oskar and Eurotel) - Testing and monitoring mobile network, connectivity (GPRS/EDGE/UMTS), performance and availability - Performance tests (Bash) and Web presentation (PHP & MySQL) - Quality of services on mobile network (T-Mobile, Oskar and Eurotel) - Testing and monitoring mobile network, connectivity (GPRS/EDGE/UMTS), performance and availability

Education

  • Czech Technical University in Prague, Faculty of Electrical Engineering
    Ph.D., Electrical Engineering and Information Technology
    2007 - 2014
  • University of Economics, Prague AND Czech Technical University in Prague
    Engineer, Master (Ing.), Business and Managment
    2009 - 2011
  • Czech Technical University in Prague, Faculty of Electrical Engineering
    Engineer, Master (Ing.), Electrical Engineering and Information Technology
    2001 - 2007

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