ZEAL Network SE

Product Manager

• Together with the rest of the JuegosONCE Product Team and ONCE’s stakeholders actively participate in the definition of the product vision & strategy.
• Lead the discovery of new products or improvements in collaboration with UX and other stakeholders.
• Transform business needs and requirements from various stakeholders into detailed user stories, continuously refining and prioritizing a product roadmap that aligns with business goals and user needs.
• Work closely with the development team to ensure timely and high-quality delivery of features and products.
• Contribute to a positive work environment maximizing collaboration with your Product Management peers and the development team.

Senior Product Manager, JuegosONCE

Data Engineer

• Seamlessly collect, process, store, and optimize company data to unlock its full power.
• Develop cutting-edge data solutions from the ground up, collaborating with stakeholders from design to deployment.
• Identify automation opportunities for existing and new applications to enhance efficiency.
• Create a DataOps strategy and champion best practices to ensure data reliability and scalability.
• Innovate and enhance data quality and architecture within your scope.
• Push the boundaries of innovation by embracing the latest technologies and methodologies.

Android Engineer

• Develop and deliver functional solutions with high-quality designs and clean code
• Write code that follows architecture guidelines, coding standards, and environment configuration best practices
• Take end-to-end ownership of the product lifecycle together with your team: from development and testing to deployment, operations, and monitoring
• Share your expertise through code reviews and pair programming

Senior Android Developer

• Collect, process, store, and optimize company data to unlock its full power
• Develop cutting-edge data solutions from the ground up, collaborating with various stakeholders from design to deployment
• Identify automation opportunities for existing and new applications to enhance efficiency
• Create a DataOps strategy and champion best practices to ensure data reliability and scalability
• Innovate and enhance data quality and architecture within scope
• Embrace latest technologies and methodologies to push the boundaries of innovation

Senior Data Engineer

Performance Marketing

• Operative Umsetzung und Monitoring von Paid Media Kampagnen
• Unterstützung bei der Budgetverwaltung, Zielgruppensegmentierung und Skalierungsstrategien
• Erstellung von Reportings und Performance-Dashboards
• Mitwirkung bei der Entwicklung von datenbasierten Kampagnenstrategien
• Nutzung von Tools wie Google Ads, Meta Ads, Google Analytics, Looker oder Excel
• Umsetzung von Kampagnen auf Paid Media Kanälen (Meta, TikTok, YouTube, u. a.)
• Durchführung von datengetriebenem A/B Testing
• Unterstützung bei Performanceanalysen von KPIs wie CPA, CTR, ROAS
• Wettbewerbs- und Marktbeobachtung

Werkstudent:in – Performance Marketing

• Erstellung und Bearbeitung von Videocontent (z. B. mit CapCut, Adobe Premiere Pro)
• Entwicklung ansprechender Hook-Ideen und Creatives für Paid Social Kampagnen
• Eigenständige Umsetzung visueller Kampagnenideen in enger Zusammenarbeit mit dem Marketing-Team
• Recherche und Briefing von Influencern und Creators
• Mitwirkung an der Ausarbeitung kanalübergreifender Kreativstrategien
• Umsetzung von Kampagnen auf Paid Media Kanälen (Meta, TikTok, YouTube, u. a.)
• Durchführung von datengetriebenem A/B Testing
• Unterstützung bei Performanceanalysen von KPIs wie CPA, CTR, ROAS
• Wettbewerbs- und Marktbeobachtung

Werkstudent:in Performance Marketing – Creativity & Content

Backend Engineer

• Design and develop scalable, robust backend services and APIs in Go, supporting gameplay logic, session handling, result generation, and state management
• Work in a cross-functional product team alongside game developers, frontend engineers, QA specialists, and product managers to deliver features end-to-end
• Ensure services are secure, performant, and maintainable, with appropriate test coverage and observability
• Collaborate on system design and architectural decisions, helping evolve our platform to meet future game and business needs
• Integrate third-party systems and tools where necessary, ensuring seamless connectivity and data flow
• Monitor, troubleshoot, and continuously improve the performance and reliability of our services in production
• Embrace a mindset of continuous improvement, sharing knowledge and contributing to a strong engineering culture

Senior Backend Software Engineer

iOS Engineer

• Develop and maintain high-quality native iOS applications using Swift, UIKit and SwiftUI.
• Contribute to developing new features in SwiftUI, while continuing to support existing UIKit components.
• Take ownership of the iOS development lifecycle — from ideation and implementation to testing and release.
• Collaborate closely with testers, UX designers, and product owners in your direct team, and work with backend, frontend, and DevOps developers across other teams to deliver end-to-end features.
• Contribute to evolving the architecture and improving the maintainability and scalability of the codebase.
• Monitor performance and stability with Firebase Crashlytics, and explore opportunities to enhance observability with tools like Xcode Instruments.
• Stay up to date with the latest iOS platform updates, frameworks, and development trends (e.g. SwiftUI, new SDK features, architectural patterns).
• Participate in code reviews, mentor colleagues, and help uphold quality standards across the team.

iOS App Developer

Content Marketing Manager

• Develop organic social media content plans aligned with paid media campaigns
• Create native, engaging content around dream houses, winners, raffles, and team activities
• Collaborate across teams (brand, performance, creative, production) to deliver integrated campaigns
• Build and manage a reliable network of content creators and influencers
• Identify, brief, and manage collaborations with influencers from micro to national scale
• Monitor channels, manage communities, and foster user engagement with an approachable brand voice
• Track performance of campaigns and creator partnerships, optimizing based on insights
• Ensure brand consistency and visual quality across all social media output

Content and Community Engagement Manager

• Operative Umsetzung und Monitoring von Paid Media Kampagnen.
• Unterstützung bei der Budgetverwaltung, Zielgruppensegmentierung und Skalierungsstrategien.
• Erstellung von Reportings und Performance-Dashboards.
• Mitwirkung bei der Entwicklung von datenbasierten Kampagnenstrategien.
• Nutzung von Tools wie Google Ads, Meta Ads, Google Analytics, Looker oder Excel.
• Umsetzung von Kampagnen auf Paid Media Kanälen (Meta, TikTok, YouTube, u. a.).
• Durchführung von datengetriebenem A/B Testing.
• Unterstützung bei Performanceanalysen von KPIs wie CPA, CTR, ROAS.
• Wettbewerbs- und Marktbeobachtung.

Werkstudent:in Performance Marketing – Analysis & Strategy

QA Engineer

• Design, build, and maintain automated test suites for slots, instant-win games, and scratchcards; perform manual testing during development and releases
• Define and evolve test strategies for animations, UI responsiveness, complex game states, and random outcomes
• Collaborate with Game Developers, Game Designers, and Artists in an agile environment
• Maintain structured test documentation: test plans, bug reports, regression checklists
• Execute cross-device and cross-browser testing to validate performance and consistency across platforms
• Ensure compliance with regulatory standards and support certification-related QA tasks (prepare test evidence, assist with audits, especially for Germany)
• Advocate for a player-first quality mindset to prevent critical issues affecting game experience or platform reputation

Senior Quality Assurance Engineer

• Plan, create, monitor, and optimize performance campaigns across Meta, TikTok, Google Ads, YouTube, and Native Display.
• Analyze, evaluate, and report on campaign performance in line with strategic KPIs.
• Support the setup and implementation of a comprehensive tracking and reporting infrastructure.
• Assist in display marketing activities and affiliate/cooperation partnerships.
• Continuously manage and improve campaigns to maximize efficiency and results.
• Coordinate with external agencies and partners to ensure strong campaign performance.
• Conduct market and competitor analysis and keep the team up to date on relevant trends and activities.