java English-speaking jobs in Mainz

Junior Digital Modeler to bridge creative sketches and engineering reality. Build high-quality Class-A surfaces using Blender and Alias. Coordinate external vendors and support the full design iteration cycle. Requires a relevant degree and a portfolio.

Sustainability Manager to drive European strategy across a real estate portfolio. Focus on asset performance, decarbonization, compliance, and data excellence. Requires property/built environment experience and technical knowledge of ESG.

Lead critical infrastructure operations across Germany, ensuring safe, resilient, and compliant operation of complex facilities. This senior role combines technical leadership, client management, and P&L responsibility.

Office Manager/Receptionist ensures smooth daily operations, manages office facilities, and provides administrative support. This role involves welcoming visitors, coordinating logistics, and supporting internal events.

Senior Project Manager to own major data centre projects from design through construction and handover. Responsibilities include managing scope, budget, risk, and coordinating diverse stakeholders. Requires experience in large-scale data centre construction and German regulations.

Experienced Rigid Truck Driver needed to safely transport M&E materials and equipment for engineering operations. Requires Category C license, digital tachograph card, and experience driving rigid trucks in industrial environments.

Oversee end-to-end procurement for the Berlin site, managing production and project materials. Serve as the primary liaison with China Headquarters, implementing corporate policies and monitoring market risks. Requires 3-5 years in supply chain/procurement with fluency in German and English.

Warehouse Associate role involves unloading, lifting, scanning, and sorting products. Candidates must be 18+, comfortable standing/walking for long periods, and proficient in German and/or English.

The Accountant oversees the general ledgers of five entities (Germany, Austria, Belgium, the Netherlands, and Poland). Responsibilities include accounts payable and receivable, asset administration, VAT calculation and filing, general ledger activities, and monthly reporting. Requires 1-3 years of general accounting experience, ten-key skills, and strong Excel proficiency.

Experienced Corporate Attorney needed for AI research projects. Expertise in M&A, governance, securities, and deal structuring is required. Supports US and international corporate law tracks.

Senior Product Manager to shape and develop product activities for railway signaling. Define product strategy, manage the lifecycle, and act as the interface between market needs, engineering, and business objectives. Requires 7+ years of relevant experience.

Experienced Operations Manager needed to lead the Berlin site of Aptco Technologies, a company specializing in high-precision laboratory instruments. Responsibilities include overseeing Production, Planning, Purchasing, Logistics, and Service while driving operational excellence and continuous improvement.

Product Operations role in a B2B SaaS startup. Responsibilities include data analysis, process optimization between Account Management and Dev, translating business needs into Jira tickets, and analyzing market platforms. Requires relevant experience in Product Management or IT Project Management.

Senior Product & UI/UX Designer to lead product vision and user experience at an industrial tech startup. Translate complex industrial processes into intuitive digital workflows, owning the full design lifecycle. Requires 5+ years designing digital products.

ISM Warehouse Assistant role involves receiving, inspecting, storing, and picking goods using SAP. Requires school completion, technical aptitude, physical capability, and fluency in German and English.

Extrusion Lead needed for a manufacturer of high-performance packaging and technical film. This hands-on role involves optimizing extrusion processes on continuous film or sheet lines, troubleshooting defects, and working with raw materials.

Project Manager to coordinate data centre construction projects, ensuring delivery is safe, on time, and within budget. Responsibilities include managing design through handover, coordinating stakeholders, and monitoring risks. Requires 5+ years' construction experience and fluency in German and English.

Business Development Manager to expand APM/PUDO networks by securing new locations and managing partner relationships. Responsibilities include commercial ownership, deployment coordination, and monitoring parcel flow. Requires 3+ years in business development.

Solution Engineer EU focuses on residential and commercial rooftop solar projects in Germany. This role delivers customized technical solutions, provides pre-sales support, and collaborates with sales to expand market share. Requires an engineering degree and 2+ years of relevant experience.

Project Engineer to define and implement cross-site technical standards for automated container handling systems. Responsible for technical design, integration, testing, and commissioning. Requires experience in automation, control systems, and project environments.