Jędrzej Jelinek

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.

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  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
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  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
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  DigAd24

  Jan 2018 - Jan 2021

  Co-Owner

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

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  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