java English-speaking jobs in Mainz

Junior Purchasing Manager handles operational purchasing, supplier research across global regions, and RFQ preparation. This role supports negotiations and monitors market developments for hospitality and commercial equipment.

Senior Data Scientist develops and operationalizes ML models using statistical modeling and machine learning. Requires a relevant degree, 3 years of experience, and strong skills in Python, SQL, and open-source libraries.

Air Freight Export Operator sought by a global logistics leader with a strong German presence. Join an expanding team and benefit from structured training, digital infrastructure, and career progression opportunities. Salary €45,000 - €60,000 depending on experience.

Strategy & Corporate Development Manager joins a global private equity-backed market leader. This role involves market expansion, commercial strategy, international growth, operating model design, and M&A. Ideal candidates have 2-5 years in Strategy Consulting or Investment Banking.

Manage creator careers, helping talent grow and monetize content. Responsibilities include negotiating brand deals, developing content strategies, and scouting new influencers. Requires familiarity with TikTok and Instagram.

Product Designer & Fullstack Developer (Working Student) owns AI product features end-to-end, from design to production. Requires strong CS/design background, full-stack experience in Python/TypeScript, and high ownership.

VAT Manager focusing on Pan EU Indirect Tax Planning and Advisory, emphasizing German and EU VAT regulations. Requires fluent German, strong analytical skills, and experience in large corporate tax departments.

Executive Assistant supporting the Chief Representative of the Germany Office. Responsibilities include managing stakeholder relations, administrative operations, communication, and assisting with project implementation. Requires a Bachelor's degree and 3-5 years of relevant corporate affairs experience.

Event Director needed to lead operations for large-scale B2B conferences. Responsibilities include building the operations team, owning P&L for 6,000+ person events, and managing supplier relationships. Requires 5+ years in senior event operations.

Chery Automobile seeks a CMF Designer to develop color and material themes for new automotive products. The role involves collaborating with designers, monitoring trends, and presenting work using Adobe Suite, VRED, and PowerPoint. Experience in automotive design, model building, and supplier management is required. Fluency in English is mandatory, Chinese is a plus.

Define and drive enterprise data architecture strategy, establishing scalable governance and MDM frameworks. Design modern data platforms for seamless integration across ERP, CRM, and other business systems.

Up to seven postdoctoral fellowships are available for transformation research at Leuphana University of Lüneburg. Fellows will develop grant proposals aligned with three conceptual streams. A PhD is required.

Manages the full lifecycle of subsidiary outlets, including strategic planning, budget control, site selection, construction, and daily operations. Ensures brand consistency, operational excellence, and regulatory compliance. Oversees outlet projects, leasing processes, and asset management. Conducts inspections, audits, and drives issue resolution.

Office Manager to oversee daily administration and office management. Responsibilities include managing vendors, ensuring safety compliance, and coordinating office operations. Requires C1 English and C2 German proficiency.

Senior SAP Treasury Consultant advises on implementation and optimization within a specialist area. Requires deep expertise in one or more Treasury modules and excellent German. Involves client advisory and approximately 30% travel across Germany.

Own end-to-end delivery of Upstream Optimization "Optimization as a Service" projects for oil and gas operators. Manage complex, technical, customer-facing projects, ensuring on-time, on-budget implementation of AI-driven solutions.

Build core capabilities for the Celonis Context Model as a Full Stack Engineer. Design scalable microservices in Java Spring Boot and develop interactive UI components in Angular and TypeScript.

Experienced AI Solution Architect needed to design and develop scalable AI and LLM-based solutions. Key tasks include building PoCs, defining architecture standards, and transforming pilots into production systems. Requires expertise in Generative AI, RAG, and vector databases.

Lead grid connection strategy for utility-scale renewable energy projects. Responsibilities include managing TSO/DSO relationships, overseeing grid applications, and providing technical guidance on compliance and connection requirements.

Medical Writer develops scientifically rigorous promotional materials for pharmaceutical and healthcare brands. This role requires translating complex medical information into clear content while ensuring compliance with industry regulations. Fluency in English and German is required.