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Frontend Developer (m/f/d) - Bratislava

We are looking for an experienced and driven Frontend developer to join our Conversion Rate Optimization Team in Bratislava, Slovakia. You will work on a multitude of industry leading and emerging online casino brands for web. You will turn concepts into A/B or multivariate tests to beat our original versions.


  • Help to measurably improve our online casino experiences
  • Work closely with stakeholders to turn requirements, concepts and ideas into testable and reliable experiments in the form of HTML/CSS/JS code
  • Ensure flawless tracking of an experiment's success metrics and custom events
  • Achieve high-quality experiments and share your knowledge by collaborating with other developers and testers (code reviews, pair programming)
  • Shape our front-end development environment in ways you deem necessary to deliver code effectively and efficiently
  • Challenge, critique and contribute to current conversion rate optimization projects
  • Lead discussions relative to the future direction of front-end development practices related to our conversion rate optimization efforts


  • Experience in developing real world web projects in cross-functional teams
  • Proficiency in HTML, CSS, JavaScript (including Angular, Vanilla JS, ES6+)
  • Experience integrating with Google Analytics / Google Tag Manager or similar products
  • You identify with a build, measure and learn mindset
  • Excellent communication, presentation and organizational skills with a strong work ethic
  • Proficiency in our company language English to communicate with stakeholders in Greentube offices across Europe (Austria, Slovakia, UK, Malta)
  • Experience implementing A/B or multivariate tests with tools such as Maxymiser, Optimizely, or Google Optimize is a plus
  • Intermediate understanding of statistics (mean vs. average, statistical variance, etc.) is a plus


  • Challenging tasks in an international, successful and innovative company
  • Opportunities for personal development as part of the company's sustained growth
  • Extensive trainings (on-site by internal/external mentors, online learning courses, conferences)
  • Flexible working hours with the possibility of intermittent home offices
  • Office in wider city center (Dunajska street, Bratislava) and numerous benefits such as fully paid food allowance, fresh fruits and coffee corner in the office
  • Regular employee events
  • Reimbursement of additional travel costs for an interview
  • A monthly gross salary of EUR 2.000,- for applicants and willingness to offer a higher salary depending on your professional experience and qualification


Greentube Slovakia is part of the Greentube Internet Entertainment Solutions GmbH, the global interactive unit of NOVOMATIC. Greentube is a leading developer and supplier of iGaming solutions. Greentube is a wholly-owned subsidiary of the NOVOMATIC Group, one of the biggest producers and operators of gaming technologies and one of the largest integrated gaming companies in the world. Greentube's industry leading omni-channel technology allows the convergence of online, mobile and land-based games. The well-diversified product portfolio includes Classic Slots, Table Games, Live Dealer Gaming, AWP Reloaded Slots, Server-Based Gaming, Social Casino Gaming, Bingo and more.


If you are interested in this position we are looking forward to your application including motivation letter and CV.
Apply Online

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