java English-speaking jobs in Mainz

Conduct independent and collaborative research on the transformation of human rights, norms, institutions, and/or practices. PhD in human rights research required, obtained within the last 3 years. Fluency in English.

Wind Turbine Blade / Composite Specialist will contribute to certification services for wind industry leaders. Responsibilities include driving type approval activities, managing certification projects, and providing technical support.

Trainee supports the Original Production team in managing and executing local productions. Assists producers in development and production areas, manages project information distribution, and gains insights into press/PR, marketing, dubbing, and streaming.

Field Service Engineer providing on-site and remote support for power electronic products in the Data Centre market. Travels across Germany and parts of Europe. Requires transferable electrical engineering qualifications and industry background in power technologies, cooling technology, data centers, telecoms, or industrial sectors.

Lemvos GmbH seeks freelance external sales partners to introduce marine robotics and autonomous systems to new customers. Responsibilities include identifying potential customers, generating leads, and coordinating with the Lemvos team on technical questions and follow-up. Experience in the marine or robotics industry is beneficial. Fluency in English is required.

Intern to assist the merchandising team with assortment planning, line building, product overviews, sales data analysis, competitor benchmarking, and market research. Support the creation of product briefs, range presentations, and merchandising tools.

Produce video content, including brand films, product videos, social media content, and presentations. Manage social media channels and ensure consistent media distribution.

EHS Specialist will standardize and implement Group EHS guidelines, monitor and report incidents, conduct inspections, and promote EHS initiatives.

HR Administrator needed for a permanent full-time position. Responsibilities include handling HR administration tasks, managing employee data, supporting applicant management, and preparing HR reports. Requires commercial training, HR experience, excellent German and English skills, and proficiency in MS Office.

Technical Consultant for ServiceNow CRM solutions (CSM, FSM, SOM). Configure, develop, and implement solutions on the ServiceNow platform. Translate customer requirements into technical solutions.

Lead the global strategy, governance, and transformation of Payroll & Time Management, ensuring scalable, compliant, and future-ready solutions across multiple regions. Manage and steer global payroll providers, lead transformation programs, and manage a small team of experts.

Senior Buyer develops and implements buying strategies, manages vendor relationships, and oversees product selection and inventory management. Requires 5+ years of fashion buying experience, strong analytical skills, and a passion for trends.

Supervises, implements, and improves pre-delivery inspection processes for vehicles across Europe. Monitors inspection processes, coordinates with logistics providers, and reports on PDI results. Develops and improves PDI processes, identifies quality concerns, and collaborates with teams to resolve issues.

This role involves driving the commissioning and start-up of low-voltage power distribution systems, performing on-site diagnostics and troubleshooting, and ensuring optimal system performance through maintenance.

Warehouse employee needed for full-time or part-time shifts. Duties include unloading, sorting, and transporting packages. Must be able to lift up to 15kg and stand for extended periods. Must be 18 years or older and proficient in German and/or English/Polish.

Schedule Coordinator for PETRA IV project. Collect, maintain, and control project and installation schedule data. Prepare and optimize reporting instruments for project management.

Nachhilfeunterricht seeks motivated tutors (m/f/d) to teach online or in person across various subjects. Earn €15–35 per hour with flexible hours.

Project Coordinator to support international logistics and project cargo operations. Plans, coordinates, and executes transportation orders, manages freight forwarding services, and tracks cargo movement. Requires logistics experience and fluency in English and Chinese.

Experienced lawyer sought to run and grow their own practice within a supportive international firm. Minimum 8 years post-qualification experience required. Must be a recognized expert in their field, entrepreneurial, client-centric, and collaborative. Fluent English required. Active practicing certificate/license with no restrictions. Willingness to operate on a self-employed basis.

The German Sport University Cologne seeks a W1 Junior Professorship in Data Science with a focus on multimodal training and movement data analysis. The successful candidate will develop approaches for training optimization in various sports contexts. Responsibilities include teaching and research, including participation in joint research activities and third-party funding acquisition. Applicants must have a PhD, relevant publications, experience with machine learning, and strong programming skills.