java English-speaking jobs in Mainz

Beauty Advisor needed for part-time position at Sephora Oberhausen. Responsibilities include customer service, stock management, visual merchandising, and supporting beauty classes. Experience in retail, customer service, and the beauty industry is preferred.

Our main purpose is to coordinate access to trading markets for our regional business units, to bundle the associated chances and risks plus to provide innovative services. Our core competencies include portfolio strategies, risk management and data processing. With activities in various European countries, we shape the future of energy. At E. ON diversity matters.

Support Technician needed for operation, repair, and upgrading of cryogenic systems. Requires technical apprenticeship or degree, attention to detail, and good communication skills in English. German is a plus.

Leads and manages commissioning and testing activities for photovoltaic (PV) projects, including grid connection and Battery Energy Storage Systems (BESS). Plans, coordinates, and documents the commissioning process, collaborating with subcontractors and stakeholders. Acts as the Responsible Electrical Person, ensuring electrical safety and compliance with standards.

The Project Officer, Critical Raw Materials supports the execution of EU-funded projects through coordination, stakeholder engagement, and data-driven reporting. The role ensures timely delivery of project activities and contributes to high-quality deliverables.

Conduct research on satellite-to-vehicle communication solutions based on 6G networks. Develop and implement algorithms for handover mechanisms between terrestrial and non-terrestrial networks. Validate concepts through simulations or prototypes. Contribute research results to 3GPP studies and working groups.

Celonis seeks a Field CTO with 15-20 years of experience to advise C-level executives on technical strategies for Process Intelligence, Agentic AI, and Enterprise Modernization. This role requires deep experience in Enterprise Modernization, EA Methodologies, and Agentic AI, as well as the ability to translate complex technical visions to business value.

Provides administrative support to a program, acting as a liaison with internal and external contacts. Maintains program SharePoint site, completes reports, and assists with Monthly Management Reviews. Requires 2 years of administrative experience, proficiency in Microsoft Office, and a valid passport. Must be able to lift heavy objects and obtain/maintain required security clearance or work permits.

Support assembly, inspection, and kitting of complex devices. Requires fine motor skills and at least 3 weeks of commitment. Minimum age 16.

Lead global corporate strategy projects, defining and implementing company strategy. Manage cross-functional teams to identify growth opportunities and improve profitability. Drive strategic planning, conduct market research, and act as a liaison between senior leadership and stakeholders.

Stress Engineer will size structural parts and components using FEM techniques and handbook methods. Analyze mechanical systems, prepare analysis reports, and assess damages. Requires a Master's degree, fluency in English and German, and several years of experience in aircraft structural analysis.

Leads Sensory & Consumer Insights projects within the Savory category, providing structured insights to internal stakeholders and customers. Plans, designs, and executes sensory and consumer research, analyzes data, and translates findings into recommendations.

DataForce by TransPerfect seeks a Voice Director with native German fluency to oversee remote TTS recording sessions. Provide real-time guidance to voice talents ensuring accurate pronunciation, natural delivery, and adherence to project guidelines.

This role drives technical transformation in manufacturing and quality operations by implementing automated inspection processes. Responsibilities include leading the design and development of automation solutions, integrating inspection equipment into production lines, and improving existing processes. The Principal Engineer will also validate solutions, support training, and harmonize best practices globally. Requires a BS degree in a technical field and 5+ years of experience in a technical or engineering role with a strong knowledge of manufacturing automation and quality plans for high-speed manufacturing.

Doctoral candidate will research the macroevolution of European literature (1800-2000) across major European languages. Tasks include assembling and structuring a large literary dataset and investigating hypotheses about literary evolution.

As a Customer Support Engineer, you will provide on-site installations, service, and maintenance for semiconductor manufacturing equipment. You will troubleshoot malfunctions, analyze error influences, and act as a ZEISS brand ambassador.

Record high-quality voice samples for a CX AI Agent. Must be a native German speaker with voice acting experience and access to a professional recording setup.

Manages robotic system deployments in European manufacturing facilities, focusing on digital integration. Leads projects from concept to commissioning, analyzes automation opportunities, and ensures seamless integration with enterprise platforms. Requires 5-10 years of experience in robotics implementation, automation, or project management.

Production Engineer to lead technical expertise for rubber molding technologies, including tooling design, compound selection, and manufacturing processes. Drive Design-to-Cost initiatives and manage supplier selection and production processes.

Account Executives drive incremental add-on business within Workday's existing customer base. Responsibilities include developing and maintaining customer relationships, performing account planning, and coordinating with internal teams. Requires 4+ years of experience selling SaaS/Cloud solutions to C-levels, negotiating deals, and building relationships for add-on business. Excellent German and English communication skills are essential.