java English-speaking jobs in Mainz

STEM PhD professionals will design domain-specific problems, evaluate AI-generated responses, and develop reference solutions to improve AI reasoning in scientific and engineering disciplines.

Backend Product Engineer will design, implement, and maintain backend services and APIs for a collaborative scheduling platform. Collaborate with product managers, designers, and engineers to build new features. Contribute to the overall architecture of the system and participate in code reviews.

Contribute to creative direction for seasonal campaigns, product launches, and brand moments across two beauty brands. Translate brand strategy into visual concepts, moodboards, and creative territories. Design within and contribute to scalable design systems applied across all brand touchpoints.

Develop and operate photoelectron spectroscopy setups, including ARPES and PEEM. Support users in sample preparation and characterization techniques such as SEM, FIB, optical microscopy, and other lab-based methods. Collaborate in scientific projects and occasionally participate in shift work.

Business Development Manager to define and execute European dealer channel strategy for robotic lawn and pool solutions. 7+ years in dealer-based sales or business development required, with expertise in either garden/outdoor power equipment or pool equipment. Must have fluency in English and at least one major European language.

Manages and advances strategic initiatives across the full lifecycle. Structures and coordinates project planning, budget, and resources. Leads and implements international, cross-functional initiatives in cooperation with stakeholders.

Leads the Finance function for a large country or multi-country organization, managing financial planning, budgeting, and performance. Oversees large Finance teams, conducts market studies, and sets financial objectives. Reports technical complaints and distributes marketing samples.

Intern in Global Communications supports the development and implementation of internal and external communications materials, including writing, editing, and proofreading. Responsibilities include preparing presentations, newsletters, and other communications materials in English and German, planning and organizing events, and collaborating with various departments.

Client Services Specialist will maintain customer data, process operational tasks, prepare analyses and reports, and support the Director of Customer Care.

Managed Security Services Advisor will oversee the delivery of Managed Detection and Response services, acting as a trusted advisor to customers. Responsibilities include translating SOC investigations into actionable recommendations, ensuring service level agreements are met, and advising on technical and operational improvements. Requires 3-5 years of Security Operations experience, strong technical knowledge of security monitoring and incident response, and excellent German and English communication skills.

The Friede Springer Endowed Professorship in Global Child Health at Witten/Herdecke University seeks a Research Assistant/Postdoc to manage the Else Kröner Center for Global Child Health (EKC-GCH) and support international research and development projects.

Experienced SAP SD consultant to lead the Order-to-Cash workstream during an SAP S/4HANA RISE implementation in the Financial Services sector.

Freelancer Sales Trainer to deliver data-driven, personalized training programs for SaaS/AI sales talent. Conduct live training sessions, provide feedback, and share best practices. Requires 5+ years of Mid-Market or Enterprise SaaS sales experience, sales training/coaching experience, and fluency in German and English.

Support daily business operations and build efficient administrative structures as part of a growing team. Responsibilities include managing administrative focus areas, coordinating processes, and collaborating with internal and external stakeholders. Fluent Mandarin and English required.

Software Development Manager to lead a team and own the technical architecture of AI-powered software products, including LLM integration, RAG systems, and scalable backend design. Requires 5+ years of experience in software architecture and AI development, with expertise in system design, scalable architectures, and leading development teams.

This is a temporary position for an Agent-based AI Process Designer. You will analyze existing HR and operational processes through a data- and AI-first lens, identify AI-based use cases, and design AI-driven process architectures. You will translate process and data requirements into agent designs and support the assessment and validation of efficiency gains. You will work closely with cross-functional teams to bring AI solutions from idea to deployment.

Trainee Romanian Translator will translate English texts into Romanian, revise Romanian texts, and contribute to terminology development in economics and finance.

Create conversion-focused copy for demand generation channels including paid ads, landing pages, and social campaigns. Translate complex technical topics into clear messaging for IT professionals. Experience with AI tools and a strong portfolio of diverse content are required.

As a Visual Merchandiser for Berlin KuDamm, you will create inspiring displays, support sales, and ensure brand consistency. You will collaborate with the store manager and Head of VM to develop visual strategies, manage VM activities, and train the store team. You will analyze product performance, adapt to seasonal guidelines, and contribute to achieving commercial goals.

Tenure-track professorship in Technology Management at TUM School of Management, Munich. Focus on transformative technologies (e.g., AI, digital platforms, green technologies). Responsibilities include research, teaching, and third-party funding acquisition.