java English-speaking jobs in Mainz

Network Administrator to support and maintain LAN, WAN, and WLAN infrastructure. Responsibilities include managing firewalls, monitoring servers, and troubleshooting IT issues. Requires 2+ years of experience with Cisco and Fortinet equipment.

Lead Product Assurance for space hardware and mechanics, ensuring compliance with ECSS/ESA standards. Requires 10+ years in mechanical space hardware, expertise in RAMS, FMEA, and ISO 9001.

Experienced Cook/Chef needed for BUYA and REI. Responsibilities include preparing dishes to standards, organizing stations, and coordinating with teams. Requires 2+ years experience, fluent English, and attention to detail.

Intern Public Affairs role supporting Corporate Public Affairs at PHOENIX. Responsibilities include analyzing policy, supporting advocacy, and preparing briefings for senior management. Requires current study in related fields and English proficiency.

Recruiter for Smart Host, focusing on end-to-end recruitment for Technology and Operations roles. Requires experience in technical recruiting, proactive sourcing, and managing the full hiring process independently.

Senior Build & Deployment Engineer (Windows) focuses on software build, deployment, and configuration management for critical systems. Requires experience with Windows Server, PowerShell, Active Directory, and tools like Ansible and CI/CD pipelines.

Lead People Services Europe ensures stable, compliant, and service-oriented People Services delivery across Europe. This role leads the regional People Services Partner team, manages escalations, and drives HR transformation initiatives. Requires HR/Business Admin background and fluency in English and German.

IT Specialist manages Crestron A/V and VTC systems, supports networked peripherals, and provides technical/administrative support. Requires a relevant apprenticeship plus two years of related customer support experience.

Head of Finance & Controlling to build the finance function. Own reporting, FP&A, planning, and infrastructure. Requires 8+ years in finance leadership, strong modeling skills, and fluency in subscription economics. Must speak German and English.

Senior Product Manager (ISR) to own the product and delivery of defence and intelligence AI-based ISR capabilities. Translate operational needs into requirements, build roadmaps, and drive end-to-end delivery for military and agency users.

The Account Manager Semiconductor drives pipeline growth by developing mid-size and large accounts. This role focuses on expanding market share and building relationships within the electronics industry. Requires 4+ years of experience and fluency in English and German.

Senior Operations Research Scientist will design and implement optimization systems for a global food delivery marketplace. Responsibilities include developing robust optimization models, collaborating with Data Scientists, and validating models through simulations. Requires expertise in commercial and open-source solvers, Python programming, and software development best practices.

Sales Support / Vertriebsinnendienst role at STARTEAM GLOBAL, a global PCB manufacturer serving diverse sectors. This position supports a company with extensive international operations.

Senior IT Systems Administrator to plan, design, and maintain corporate network infrastructure. Responsibilities include security implementation, performance monitoring, and compliance documentation. Requires 7+ years of experience and strong network knowledge.

Provide first-level support for warehouse logistics by handling support requests, quality checks, and inventory tasks. Resolve operational issues related to goods receipt, dispatch, and order picking.

Advance 300mm epitaxy characterization by establishing new material characterization methods. Guide engineers in thin film and epitaxy characterization, standardizing measurement processes. Requires PhD/Masters and 5+ years in semiconductor R&D.

Proactive Office Assistant & Events Coordinator needed to support daily office operations and coordinate internal/external events for a global investment firm. Requires experience in administrative support and fluent German with intermediate English.

Build Capital Cell's life sciences investment platform in Germany. Originate investment-ready companies and build a German investor base. Requires German/English fluency and ecosystem expertise.

Senior Talent Acquisition Specialist drives recruiting and performance management. Responsibilities include owning requisitions, improving hiring processes, and coordinating company-wide performance reviews. Requires 7+ years in operational recruiting and performance management.

Senior Group Accounting and IFRS Specialist prepares consolidated financial statements under IFRS. This role acts as an IFRS expert, advising subsidiaries and stakeholders on complex accounting and consolidation matters.