Rogon Technologies GmbH

Data Engineer

• As CUJU’s first Senior Data Engineer, you will build the data foundation of the company.
• Your mission is to transform fragmented data across multiple systems into a reliable, scalable, and usable data layer that enables: Clear business metrics (e.g. MAU, retention)
• Product decision-making
• Future player performance insights
• Define and implement core data models (users, events, performance)
• Design and operate robust, production-grade data pipelines
• Establish a single source of truth for key business and product metrics
• Structure data for business and product analysis (retention, funnels, activation)
• Build and deploy data services and jobs on AWS (e.g. S3, Lambda, ECS/EKS, Glue, Athena, Redshift, etc.).
• Make pragmatic decisions on how data is stored, processed, and accessed
• Evaluate and introduce tools (e.g. BigQuery, Snowflake, Databricks) where they add clear value
• Ensure the architecture scales with product, AI, and data growth without overengineering
• Optimize pipelines for scalability, cost efficiency, and performance.
• Write clean, maintainable, and well-structured Python code following software engineering best practices.
• Work closely with Product, Engineering, AI, and Business teams.

Senior Data Engineer – Data Foundation, Analytics

Product Designer

• Lead the UX/UI design for CUJU’s mobile-first product (iOS & Android).
• Facilitate Design Sprints, ideation, and conceptualization workshops.
• Design user flows, wireframes, prototypes, and high-fidelity visuals in Figma.
• Ensure visual consistency and scalability through a robust design system.
• Collaborate closely with developers to ensure accurate and high-quality design implementation.
• Plan and execute user research, including in-person interviews and usability testing.
• Translate insights into actionable design improvements.
• Develop personas, journey maps, and experience frameworks based on real data.
• Iterate quickly through prototypes and user validation cycles.
• Work closely with Product Managers, Developers, and QA to ensure experience excellence.
• Advocate for user-centered thinking and elevate design quality across the product.
• Contribute to the evolution of CUJU’s design system and cross-platform consistency.
• Take ownership of the CUJU app experience, ensuring every interaction is intuitive, delightful, and purpose-driven.

Senior UX/UI Designer

Backend Engineer

• Design, build, and maintain production ML systems and pipelines
• Write clean, testable, and maintainable Python code
• Deploy and operate models in production (APIs, batch jobs, real-time systems)
• Work hands-on with AWS infrastructure to build scalable systems
• Use distributed systems (Ray) for large-scale workloads and model serving
• Containerize and deploy services using Docker (Kubernetes is a plus)
• Improve and maintain CI/CD pipelines for ML workflows
• Ensure robust testing, monitoring, and reliability of ML systems
• Contribute to improving system architecture, performance, scalability and cost efficiency
• Treat modeling as part of software engineering—not a separate activity

Senior Data Engineer – Data Foundation, Analytics

Senior UX/UI Designer

Python Software Engineer – Machine Learning Systems