java English-speaking jobs in Mainz

The People Tech & Analytics team’s mission is to enable long-term scalability by fostering a data-informed culture through seamless systems and a people-centric employee experience. As part of this mission, we’re now looking for a People Tech Integrations Specialist. You’ll build, integrate, and maintain the systems that keep our People operations running efficiently.

Combine a vocational training in Mechatronics or Chemistry with a dual study program at tesa. The program offers a foundation in practical skills and theoretical knowledge, leading to a promising career.

Supports the strategic direction of technology investments for HR applications. Designs and implements complex solutions, ensuring long-term technical viability and adherence to standards and regulatory requirements. Communicates architecture goals to business stakeholders.

Negotiate long-term service contracts for wind turbines, aligning with business objectives and customer needs. Develop pre-sales strategies, prepare pricing and tender documentation, and collaborate with sales, legal, and technical teams.

Vantage Data Centers seeks a Critical Facilities Engineer to maintain and repair data center infrastructure. The role involves hands-on work with UPS, PDU, diesel generators, ATS equipment, building controls, chillers, CRAH units, and electrical/mechanical systems. The ideal candidate has experience in industrial electrical and mechanical systems maintenance and repair in mission-critical facilities.

As a Senior Specialist Applications, you will provide technical expertise for Roche products, drive customer success through project leadership, and mentor junior team members. Responsibilities include supporting new assay launches, assisting partners in assay development, providing expert-level technical support, designing training programs, and creating technical documentation.

Shape AI and data-driven solutions for energy networks across Europe. Lead the definition, development, and execution of AI strategy. Manage cross-functional teams and represent Energy Networks as a subject matter expert.

Develop and deliver AI-based ADAS functions, including object detection, behavior prediction, and trajectory planning. Design and optimize humanlike driving behavior models. Own complete training, evaluation, and release cycles.

Develop and operate Java applications and services for the Tick-Data Platform, a mission-critical data foundation for trading operations. Work with a modern tech stack including AWS, Kafka, PostgreSQL, and Azure Boards. Collaborate in agile squads to design, build, and support cloud-based applications.

Sales Development Specialist for Asia-Pacific region. Drive outbound sales through cold outreach, LinkedIn, and partner channels. Own end-to-end quoting for servers, networking equipment, and colocation needs. Support clients needing remote hands, hardware installs, migrations, and DC services. Experience in IT/datacenter/infrastructure sales required. Bilingual (Chinese) required.

Maintenance Methods Engineer (m/f/d) needed for a project in Hessen. Responsibilities include master data management, maintenance planning and strategy development, engineering and design review, reliability engineering, and cross-functional collaboration.

The Clinical Research Associate executes clinical monitoring activities at trial sites, ensuring adherence to ICH guidelines, GCP, and SOPs. Responsibilities include site selection, protocol training, monitoring visits, and managing site performance. Requires a BS in a relevant scientific discipline and 2+ years of monitoring experience in the pharmaceutical or CRO industry. Oncology/hematology experience is preferred. Fluent in English and German is required.

Creates and maintains technical documentation for aircraft manuals, including AFM, AMM, and IPC. Collaborates with Engineering, Airworthiness, Production, and Customer Support to ensure clear, standards-compliant manuals for pilots and maintainers. Prepares technical drawings, illustrations, and source documents. Supports internal and external technical inquiries on documentation.

Intern (m|f|d) - Research & Development - Stock Preparation. Support research and development projects in sustainable and efficient paper production. Develop, commission, and evaluate test rigs. Plan, execute, and evaluate experiments. Support external trials in paper mills.

Plans, designs, and implements access control, video surveillance, and intrusion detection systems across Freudenberg locations. Troubleshoots technical alerts and oversees security equipment inspections. Requires vocational training in electrical/communications engineering and facility security experience.

Open and operate the Stranger Soccer business in Stuttgart. Recruit, train, and lead a team to run football games at venues. Engage in sales and marketing to introduce the platform to customers.

Develop and implement holographic display solutions, from concept to prototype. Combine optical design expertise with hands-on lab work, collaborating with customers and teams.

The Institute for Digital Economics at Hamburg University of Technology seeks a Research Associate to conduct independent and collaborative research projects, present findings at conferences, and publish in academic journals. The role also involves contributing to teaching and supervising final theses.

Provides inbound and outbound lead generation and client engagement campaigns for a technology organization. Conducts market research, identifies high potential clients, and qualifies leads for sales meetings. Requires proficiency in English, Chinese, and German.

Intern (m/f/d) - Venture Capital with a focus on Climate Tech Job purpose / role You would like to work on exciting, innovative projects and develop your skills? You would like to work with investment professionals at a real global player? Then you've come to the right place!