Jędrzej Jelinek

Jędrzej jelinek

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location of Jędrzej JelinekWarsaw, Mazowieckie, Poland
Phone number of Jędrzej Jelinek+91 xxxx xxxxx
Followers of Jędrzej Jelinek413 followers
  • Timeline

    Jan 2011 - Feb 2013

    Web developer

    Merixstudio
    Mar 2013 - Oct 2017

    Team manager / Tech Leader

    AdOcean Ltd
    Warszawa, woj. mazowieckie, Polska
    Dec 2015 - Oct 2016

    Owner

    Crea5 Collective
    Oct 2017 - Nov 2021

    Technical Lead

    Gemius
    Jan 2018 - Jan 2021

    Co-Owner

    DigAd24
    Current Company
    Nov 2021 - now

    Software Engineering Manager

    Spartez (an Appfire company)
  • About me

    Engineering Manager @ Whiteboards.io

  • Education

    • Uniwersytet im. adama mickiewicza w poznaniu

      2007 - 2010
      Licencjat algorytmika i inżynieria oprogramowania
  • Experience

    • Merixstudio

      Jan 2011 - Feb 2013
      Web developer

      At Merixstudio I was responsible for creating and maintaining websites for big players such as Payback.pl, Link4 or Grant Thornton.

    • Adocean ltd

      Mar 2013 - Oct 2017

      I manage a team of developers responsible for development of advanced advertising formats (diaplay, mobile, RTB, ...) As a Senior JavaScript Developer at AdOcean (Gemius) I was responsible for few things.I was developing user interfaces for such products as gemiusDirectEffect and AdOcean adserver.On the other hand I was maintaining and developing javascript libraries for measuring effectiveness of advertising campaigns and for displaying advertising creatives on publishers' pages.

      • Team manager / Tech Leader

        Jun 2016 - Oct 2017
      • Senior JavaScript Developer

        Mar 2013 - Jun 2016
    • Crea5 collective

      Dec 2015 - Oct 2016
      Owner

      I'm the Crea5 Collective founder. The owner of the company providing solutions for online advertising - advanced HTML5 creatives, creative templates and other complex HTML5 solutions well-fitting our clients' needs.

    • Gemius

      Oct 2017 - Nov 2021

      * Managing a team of 4 people* Researched, planned, and executed migration web extension from manifest v2 to manifest v3 (completely different architecture) - project lasted 8 months and succeeded.* Developed web extension (javascript) for collecting data from research participants - improved code quality and test coverage (from 30% to 70%) and reduced the total cost of ownership (measured by different metrics like team speed/velocity, number of bugs, and breakdowns, and other)* Developed web platform (Django python) for managing audience research (TV, radio, online - pc and mobile) and related assets (such as smartphones and other devices)* Overseen development of outsourced Android (Java) applications - discussing technical projects with our partner (from tech and business perspectives), designing testing processes, code review provided solutions Show less I work with the team responsible for developing systems designed for recruiting and monitoring research panels. My role is to build high-performance team, teach team members and the "business" agile methods and profits of using them in complex systems.* Facilitated meetings, helped resolve conflicts between teams* Introduced Kanban in one team as more suitable option; improve team performance and communication with business thanks to metrics like cycle and lead time* Supported Product Owner in prioritizing tasks and set business goals using tools like Impact Mapping, User Story Mapping, Magic Estimation, etc Show less

      • Technical Lead

        Jan 2019 - Nov 2021
      • Scrum Master

        Oct 2017 - Jan 2019
    • Digad24

      Jan 2018 - Jan 2021
      Co-owner

      Co-owner of an advertising network selling ads in a programmatic model

    • Spartez (an appfire company)

      Nov 2021 - now
      Software engineering manager

      Working on Whiteboards.io - a fast-growing free-form tool for collaboration* built team - from 4 to 15 engineers in less than a year (conducting technical and “soft skills” interviews, actively searching for candidates)* organized teams (initiated split into separate ones) according to leading approaches (Team Topologies approach)* managing multiple teams - organized processes, taking care of team building, taking different actions to increase teams’ performance* actively contributed to the roadmap and product goals (technical and business), challenged ideas, proposed my own (and also challenged them ;) )* built an empowered, committed team taking responsibility for the product* implemented features (i.e. comments module) to increase product activation and adoption* implemented together with the team the billing feature to make Whiteboards.io a full standalone SaaS product Show less

  • Licenses & Certifications

    • Ibm db2 fundamentals

      Ibm
    • Mongodb for node.js developers

      Mongodb, inc.
      View certificate certificate
    • Auditor wewnętrzny systemu zarządzania bezpieczeństwem informacji wg iso 27001:2017

      Bsi training academy
      Aug 2021