java English-speaking jobs in Mainz

Experienced Senior Design Manager to lead design management for Data Centre and Mission Critical projects. Manage multidisciplinary teams, budgets, and deliverables, ensuring projects meet technical standards and deadlines. Requires a degree in Mechanical, Electrical, or Building Services Engineering and 5+ years of relevant experience. Fluent English required.

Sales Representative will build and maintain customer relationships, identify new business opportunities, and provide technical and commercial support.

Manage implementation, optimization, and innovation projects for Customer Service systems. Design, configure, and maintain systems, analyze operational drivers, and ensure reliable operation.

Design, build, and optimize large-scale machine learning systems for identity verification products. Productionize AI models, improve performance, and build robust ML pipelines. Develop scalable backend services and deploy models through APIs.

Acoustic Validation Engineer needed to establish and evolve validation labs and processes for AI-based and traditional audio technologies. Responsibilities include designing test environments, executing objective and subjective audio tests, collaborating with engineers, and evaluating partner products. Requires a degree in a related field, experience with acoustic validation, strong listening skills, and programming experience.

Leuphana University of Lüneburg's Leuphana Center for Cooperative Security invites applications for its international doctoral program in "Cooperative Security," launching in April 2027. This interdisciplinary program supports innovative PhD research on global security challenges from political science, economics, law, and psychology perspectives.

Leads the Center of Excellence Accounting Team, ensuring efficient and standardized accounting structure. Responsible for preparing consolidated financial statements and ensuring compliance with IFRS. Serves as a sparring partner for Group Management Board and other finance departments.

Laboratory Technician or Mechatronics engineer needed to design, alter, and maintain electrochemical equipment and build battery cells for research and prototyping. Responsibilities include test bench construction, lab maintenance, cell manufacturing, and testing. Must have technical training, strong problem-solving skills, and experience with gloveboxes, soldering, and CAD models.

Project Procurement Manager for offshore wind installation subcontractors. Manages resource development, subcontractor pre-qualification, and tendering processes. Evaluates technical and commercial proposals, conducts negotiations, and supports strategic subcontracting initiatives.

The Faculty of Forest Sciences and Forest Ecology at the University of Göttingen seeks an internationally experienced researcher to prepare and submit a funding proposal for an ERC grant or the Emmy Noether programme. The three-year, fully funded position offers flexibility to work on the proposal and integrate into a collaborative research environment. Applicants must have a PhD in a relevant field and be eligible to apply for an ERC Starting Grant or the Emmy Noether Programme within two years.

Design, develop, and optimize compiler translations for GPUs. Investigate and implement performance enhancements for GPU systems. Analyze workloads and evaluate compilation technology against hardware features.

Senior Data Architect to define, design, and evolve enterprise data architecture across cloud and lakehouse platforms. Translate business requirements into robust data models, integration patterns, and governance controls. Provide technical leadership through architecture reviews and best practices.

Senior Commercial Manager leads the strategic and operational development of a key pan-European omnichannel account, driving revenue and profit growth. Manages commercial performance, develops activation strategies, and optimizes omnichannel performance across touchpoints. Collaborates with international teams, builds strategic relationships, and identifies growth opportunities. Requires a degree in business administration, economics, or a comparable qualification, and experience in Key Account Management within the consumer goods sector. Fluency in German and English is required.

Warehouse worker needed for various shifts. Duties include receiving and putting away inventory, preparing customer orders, loading trucks, operating powered industrial trucks, and ensuring product quality. Must be 18 years or older and proficient in German, English, or Spanish.

Experienced Head of Human Resources to lead people agenda at a major industrial operation in Germany. Requires extensive experience leading organizational transformation in a complex industrial environment. Strong track record of leading major change, working with Works Councils and trade unions, and building relationships with stakeholders. Fluent German and English required.

Financial Analyst needed for a confidential international financial institution in Frankfurt. Support day-to-day accounting operations, financial reporting, audits, and regulatory requirements. 2-3 years of accounting or finance experience in a financial institution required.

Saarland University's Medical Faculty invites applications for a fixed-term W2 professorship in Systemic Neuroimmunology. The position is part of the new Klaus Faber Institute for Neuroimmunology, focusing on research into neuroimmunological diseases, particularly multiple sclerosis. The successful candidate will conduct research and teaching in systemic neuroimmunology, have experience in a leadership position, and a strong research record.

Leads a team to ensure safe, efficient, and high-quality operations at an Amazon site. Oversees projects to improve processes, productivity, and customer service. Analyzes shift performance and collaborates with management to standardize practices.

The Helmholtz Centre for Environmental Research (UFZ) seeks a scientific leader to head its Research Unit "Ecosystems of the Future". The Head will shape the Unit's scientific vision, manage its budget and personnel, and develop a research strategy aligned with UFZ goals. The successful candidate will have a distinguished scientific track record, strong leadership skills, and experience in international scientific networks.

Senior Product Manager to drive growth and optimize the customer journey across landing pages, onboarding, checkout, and more. Requires 5+ years of CRO experience, proven track record in ecommerce, and expertise in A/B testing, analytics, and UX.