java English-speaking jobs in Mainz

Shape and build digital customer experiences across chat, voice, and customer portals. Combine product ownership with technical execution, turning ideas into impactful solutions. Collaborate with cross-functional teams to drive innovation and deliver measurable outcomes.

The Data Center Engineering Operations Technician is responsible for the delivery of best practice systems and problem resolution on all data center electrical and mechanical infrastructure. This role requires a highly driven individual who demonstrates initiative and proactively seeks solutions to complex technical problems. The successful candidate will be accountable for setting and maintaining the highest standards for safety, driving continuous improvement efforts, and collaborating with stakeholders to deliver operational excellence.

Senior Security Engineer designs, implements, and matures security architecture across various domains. Partners with teams to review, harden, and implement security controls. Oversees vulnerability management, penetration tests, and threat hunting. Mentors SOC analysts and maintains documentation. Requires a Bachelor's degree in a related field, 5+ years of experience, and strong knowledge of security frameworks and tools.

The Fraunhofer Institute for Electronic Microsystems and Solid State Technologies EMFT seeks a Semiconductor Test Expert to develop and implement test solutions for semiconductor devices and microelectronic systems. Responsibilities include developing test programs, procuring test hardware, and collaborating with design teams and industry partners.

The Warehouse Operator is responsible for the physical flow of spare parts, including receiving, put-away, picking, packing, and dispatch. This role requires meeting productivity targets, ensuring inventory accuracy, and prioritizing emergency orders. Must have a valid forklift operator license and experience in a fast-paced parts distribution center.

Yibi Precision seeks a technical professional to develop and execute a market strategy for MIM technology adoption in European industrial sectors. Responsibilities include identifying and targeting potential clients, leading the client acquisition process, and providing technical consulting and solution development.

Provides administrative, logistical, and operational support to a German office of a multinational company. Manages office operations, mail, government affairs, visitor support, expense reimbursement, and employee assistance. Requires fluency in German, English, and Mandarin Chinese.

Global IT Procurement Manager needed for a market leading manufacturing company. 5+ years of IT procurement experience in hardware, software, and infrastructure required. Experience with SAP, S/4HANA & Ariba is essential. Lead strategic sourcing activities, from market analysis to contract negotiation. Collaborate with stakeholders to ensure procurement strategies align with organizational goals.

Lead a Group-wide program to standardize customer contracts across the UI Group, ensuring consistency in commercial terms, governance standards, and risk management practices. Drive the transition from legacy agreements to a new contractual framework, balancing strategic objectives with client relationships.

R&D Intern to support industrial R&D pipeline and maturation of a chemical-physical sensing platform. Tasks include experimental design, execution, documentation, data analysis, and identifying sources of variability. Requires a degree in a related experimental science, strong experimental skills, and basic Python data analysis.

Project Developer supports the development of renewable energy projects, primarily onshore wind, through permitting, coordination, and technical groundwork.

Senior Tax Expert leads tax agenda for international decisions across Allianz entities, ensuring tax considerations are embedded in strategic decision-making. Drives tax structuring, coordination, and execution of acquisitions, divestments, and restructurings. Designs, drives, and implements tax planning and restructuring initiatives to optimize effective tax rate and cash tax outcomes.

Design and develop electrical systems for complex robotic systems. Select and integrate electronic components, create schematics and PCB layouts, and troubleshoot electrical issues.

Technical Customer Care professional combines expertise with customer focus. Supports customers from inquiry to solution delivery, creating quotes, handling complaints, and collaborating with sales and engineering. Requires technical background, experience in a customer service role, and proficiency in MS Office.

Senior Backend Engineer will architect, enhance, and streamline backend systems, focusing on scalability, CI/CD pipelines, and monitoring. Expertise in Python, NodeJS, or C++ is required, along with a strong track record in production environments.

Provide proactive, personalized customer support and represent the company's quality and service standards. Coach customers on online workflow tools and serve as a point of contact for brand customers.

This role supports clients in transforming business processes through AI, automation, and process innovation. Responsibilities include designing future-state processes, integrating AI solutions, and leading transformation programs. Experience in process improvement, business transformation, and understanding of AI technologies is required.

Lead FZS's global efforts to combat illegal gold mining in and around protected areas by driving policy change, influencing global markets, and strengthening international partnerships.

Manufacturing and MRO Engineer - A400M Program will act as the technical link between Engineering, Maintenance operations, and Customer Management. Responsibilities include planning aircraft events, providing technical support, optimizing processes, and managing technical relations. Requires a Bachelor's degree in Engineering, Aerospace, or a related field, 3+ years of experience in Aerospace Engineering and Manufacturing Engineering, and solid technical knowledge of the A400M Aircraft. Fluent English is required.

Leads procurement for Marketing, Trade Marketing & Logistics categories, sourcing indirect goods and services cost-effectively. Collaborates with internal departments to understand purchasing needs and negotiates contracts with suppliers. Manages supplier relationships, develops cost optimization strategies, and participates in tender processes.