Our mission: Are you a motivated QA Engineer who wants to make an impact by ensuring the quality and reliability of scalable cloud-based applications through thoughtful testing and continuous improvement?At Open-Xchange, we develop open-source communication and collaboration software used by public sector organizations, telcos, and hosting providers to keep data secure and under their control. Our products cover email, collaboration, DNS security, and related services, and are used by millions of people worldwide. Discover what Open-Xchange offers you: - We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company’s success and customer value. - We value expertise and continuous professional development. Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills. - Openness and diversity are core to OX. Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture. Your team: You'll be part of the Cloud Connect team, working on building and operating scalable, reliable cloud-based solutions. The team collaborates closely with development, operations, and customer-facing units to deliver high-quality services. Your new job: - Ensure high quality in custom software projects. - Analyze and assess risks related to client requirements. - Design, maintain, execute, and document (automated) tests. - Collaborate closely with project teams and technical client departments. - Actively support development and operations teams. This is the tech stack you'll be working with: Your background: - Degree in computer science or a comparable qualification with relevant experience. - Experience working with agile methodologies in software testing and development. - Solid understanding of web-based applications and APIs. - Basic knowledge of tools, methods, and programming languages for test automation. - Strong attention to detail, user expectations, and potential sources of error, combined with a structured and results-oriented working style. - Willingness to learn new technologies, contribute innovative ideas, and collaborate effectively within a team. - Intrinsic motivation to take ownership and a passion for open-source technologies, thriving in a low-hierarchy environment. - Strong verbal and written communication skills in both German and English. - Comfortable working in a remote-first environment with multicultural teams across different time zones. This is what you get at Open-Xchange: - The flexibility to work 100% remotely ensures a work environment that suits you best. - Flexible working hours that allow you to successfully combine your home and family responsibilities with work. - Getting together in-person for workshops and fun team events. - Time off to volunteer – and mental health support when you need it. - We provide financial relief through corporate benefits and a subsidy for ergonomic chairs and desks. - We can discuss further location-related benefits together in an initial talk. Join the team: Join us in our fight for an open internet and deliver added value! Click “Apply now” to submit your application. Your contact person: Reach out to Justin (recruiting@open-xchange.com) from the People Team. He will be able to discuss current opportunities and tell you more about our exciting vision and mission @OX.

• Lead application engineering efforts for renewable energy technologies, providing critical insights and recommendations. • Lead the development, configuration and maintenance of new HMIs and data models visualizations. • Collaborate with the team to analyze and manage data from renewable energy technologies, providing valuable insights and recommendations. • Play a key role in engaging with customers to gather specifications for for configuration of the applications. • Utilize Python, SQL and Excel to expertly process and perform applications configuration. • Effectively identify networking or similar issues and inform technical stakeholders suggesting solutions. • Execute detailed technical project documentation analysis, organization and preparation. • Keep abreast of industry trends and best practices through proactive research and curiosity.

• Conducting on-site commissioning of legacy and retrofit equipment • General maintenance and troubleshooting activities • Preparing site visit reports and maintaining timesheets • Starting up and maintaining combustion products and systems • Identifying potential opportunities for aftermarket spares and site service support • Supervising on-site turnaround/outages contracts • Delivering training to end-user personnel

Role Description - Architecture & Development: Design and implement scalable data pipelines using Apache Spark (PySpark) on Databricks. You will build solutions, not just run scripts. - Optimization: Analyze and optimize complex Spark jobs for performance and cost (partitioning, z-ordering, Photon engine utilization). - Modernization: Migrate legacy data warehouses to the Lakehouse architecture using Delta Lake. - Standards: Enforce high code quality standards through rigorous code reviews and CI/CD implementation (Databricks Asset Bundles). - Mentorship: Share knowledge with the team and act as a technical advisor for clients. Qualifications - 5+ years in Data Engineering with a strong focus on distributed systems. - Minimum 3 years of hands-on experience with the Databricks platform. - Production experience with Azure (ADLS Gen2, ADF) or AWS (S3, Glue). - Advanced proficiency in Python and SQL. - Experience with Unity Catalog implementation. - Fluent English (C1+) is mandatory for direct client collaboration. Requirements - Experience building data applications using Databricks Apps. - Familiarity with Delta Live Tables (DLT). - Databricks Certifications (Data Engineer Professional). - Experience with dbt. Benefits - Competitive Salary: 160 - 210 PLN / hour or Equivalent in USD, based on your experience and skills. - Stable Employment: Contract signed with our Polish entity (Entrada AI Poland). - 100% Remote: Full flexibility to work from anywhere in Romania. - Apple Hardware: Macbook Air M4 15" provided. - Referral Bonus: Bonus for bringing other top-tier engineers to the team. - Professional Growth: Databricks certification cost coverage. - Support on the path to becoming a Databricks Solution Architect Champion. - Opportunity to present at industry conferences (building your personal brand). - Direct collaboration with Databricks MVPs and product teams.