java English-speaking jobs in Mainz

CNC Machinist with experience operating Fanuc lathes. Sets up and configures CNC machining centers, runs and optimizes programs, performs quality control, and supports process optimization.

Product Manager to drive end-to-end product lifecycle management and regional business growth. Responsibilities include product planning, promotion, technical collaboration, and cross-functional coordination to deliver localized product solutions.

Develop and implement commercial product strategies for Public Cloud services, focusing on Pay-as-you-Go and subscription pricing models. Collaborate with development, operations, marketing, and sales teams on go-to-market strategies. Define product success metrics and conduct market and competitive analyses.

Lead, develop, and mentor a finance team overseeing financial accounting and finance operations for a German entity within a growing international organization. Manage financial reporting, budgeting, forecasting, and cash flow planning.

This postdoctoral research position focuses on evaluating and optimizing AI models for surgical video understanding. The successful candidate will design and lead research projects, collaborate with partners, mentor students, and contribute to publications and grant writing.

Associate to support infrastructure investments across Europe and North America. Responsibilities include financial modeling, due diligence, investment committee materials, and portfolio monitoring.

Working student supports legal, governance, and compliance tasks for a German software and AI company. Tasks include reviewing contracts, researching legal topics, and supporting sales and project teams. Requires current enrollment in Law or Business Law, strong research and communication skills, and fluency in German.

Develops and delivers sales of company products and services for a large customer. Leads and coaches a team responsible for premium brands, supporting the development and implementation of business plans, pricing strategy, and customer satisfaction goals. Analyzes market opportunities, develops and implements strategies with the customer to maximize mutual success. Responsible for the financial performance of the customer by setting strategic goals and plans.

The HR Leader DACH, Country & Plant for Germany will lead HR for a global manufacturing company's German operations and across DACH (Germany, Austria, Switzerland). This dual-role combines Country HR leadership (60%) and Plant HR leadership (40%). Responsibilities include building organizational capability, supporting operational excellence, leading a high-performing team, and ensuring compliance.

Fastned seeks a Chief Commercial Officer to lead commercial strategy and operations across Europe. The CCO will own the full commercial logic of the business, including network positioning, pricing, brand development, and policy engagement. The ideal candidate has a proven track record of building and scaling commercial organizations in a listed scale-up or high-growth environment.

Financial Analyst DACH (m/f/d) will focus on Equipment Financial Agreements (EFA) for the Surgical business in Germany, Austria, and Switzerland. Responsibilities include discussing financing options with sales teams, negotiating contracts, analyzing financial data, and supporting month-end closing activities.

Leads KFC's new store development efforts in a designated region of Germany, identifying priority markets and expansion strategies. Manages projects from site identification through signed agreements, permitting, and handover to construction and operations teams. Builds strategic partnerships with property owners, developers, and municipalities to secure new restaurant locations.

Tieto Tech Consulting seeks an SAP FI/CO Consultant to configure, implement, and optimize processes within SAP Finance and Controlling modules. Responsibilities include gathering requirements, designing processes, providing support and troubleshooting, and engaging with customers. The ideal candidate has solid experience in SAP Finance and/or Controlling, consulting experience, and fluency in German and English.

Data Center Engineering Operations Technician supports the design, delivery, and operation of global AWS infrastructure.

German-speaking SAP SD Consultant needed for a mainly remote S/4 project in Europe. Requires 5+ years of SAP SD experience, at least 1 full implementation project, and SAP S/4HANA Public Cloud experience.

Provides expert guidance on global transaction tax engagements, supervising complex cross-border workstreams and developing tax-efficient planning strategies. Cultivates client relationships and guides junior team members. Requires proven experience leading transaction tax projects, strong academic credentials, and fluency in German and English.

Test Engineer with Chinese to conduct end-to-end testing of automotive cockpit systems, including infotainment, dashboards, and driver assistance systems. Responsibilities include designing, executing, and maintaining test cases, ensuring functionality in various conditions, and collaborating with development teams. Requires a driver's license, fluency in English and Chinese, and experience in automotive cockpit testing or a willingness to learn. Familiarity with testing tools and scripting is beneficial.

Operate, monitor, and supervise production equipment in a manufacturing environment. Perform setup, changeover, and finishing activities, as well as minor repairs. Diagnose faults and contribute to process optimization.

Senior Health & Safety Consultant needed for a two-month construction project in Rheinberg, Germany. Must have a valid SiGeKo qualification and be available to start August 3, 2026. Responsibilities include monitoring safety standards, coordinating with contractors, conducting inspections, and ensuring compliance with German safety legislation.

Own semiconductor coverage for a concentrated, high-conviction portfolio. Conduct bottom-up fundamental research on chipmakers, equipment, materials, and related hardware. Surface investment ideas before consensus and build actionable models combining fundamental judgment with alternative data and AI.