java English-speaking jobs in Mainz

Working Student supports marketing efforts for educational programs focused on entrepreneurship and technology. Responsibilities include content creation, social media management, event promotion, and program coordination.

Leads and develops a sales team within a dedicated automotive segment, driving strategy, market development, and profitability. Manages key accounts, identifies growth opportunities, and ensures alignment with overall sales and product goals. Requires leadership experience, sales strategy expertise, and a strong understanding of market dynamics.

PhD student position in Structural and Molecular Biology focusing on otoferlin-driven synaptic vesicle fusion at inner hair cell ribbon synapses. The successful candidate will use structural biology techniques like cryo-EM and AI-driven modeling to study otoferlin's interactions with membranes, SNARE proteins, and other fusion machinery.

Program Manager to direct and control program activities, develop and execute program schedules, manage program costs and risks, and foster communication with stakeholders. Requires a Master's degree in Aerospace Engineering or comparable field and 10+ years of experience in avionic projects.

Take end-to-end ownership of cloud-native platforms and deliver reliable e-mobility services. Develop, provision, and operate AWS cloud application environments using Terraform. Design and implement CI/CD pipelines and automate technical processes. Monitor cloud accounts, infrastructure, and applications using observability tools. Participate in on-call rotations, respond to incidents, and troubleshoot complex issues.

Support project and product management activities in a digital and automation team. Assist with project coordination, product management tasks, and workshop organization.

Serves as primary point of contact for global automotive customers, managing full order process, logistics, and forecast execution. Drives process improvements, collaborates with cross-functional teams, and ensures on-time, compliant execution.

Defines and executes enterprise-wide Data & AI strategy, partnering with leadership to identify and prioritize AI use cases. Designs and prototypes AI/ML and GenAI solutions using frameworks such as PyTorch, TensorFlow, and LangChain. Drives end-to-end architecture for data ingestion, feature engineering, model deployment, and monitoring. Mentors data scientists and engineers in advanced modeling and prompt optimization. Evaluates and integrates AI platforms to accelerate innovation. Communicates complex AI strategies to senior leadership and stakeholders.

The Procurement Manager (m/f/d) will lead and develop procurement activities for high-precision metrology solutions within the semiconductor industry. The role ensures a reliable, cost-efficient, and future-oriented supplier base, drives supplier management, negotiations, and cost optimization, and supports the smooth supply of materials, parts, and services.

Google Cloud Consulting Pursuit Leads connect customers with Google Cloud Services to achieve business goals. Leads understand customer needs, translate them into service strategies, and manage the entire services lifecycle. This role requires fluency in English and German.

North Vector Dynamics seeks a part-time European Sales and Partnerships leader to develop the European market for defense technology. The role involves managing the full sales cycle, building strategic partnerships, and engaging with defense ministries and prime contractors.

Lead and support strategic and operational projects to boost future business across functions and regions. Develop, harmonize, and govern global innovation processes and decision forums.

Graduate Assistant to support copyediting, website maintenance, digital repository management, research assistance, and general administrative tasks. Must be enrolled in a German master's program, have native-level English proficiency, and be proficient in Microsoft Office.

Information Management Coordinator supports the development and operations of EUMETSAT satellite systems. Provides information management support to all EUMETSAT business areas and contributes to the evolution of the overall IM framework.

Senior Security Engineer responsible for IAM strategy across Entra ID and Active Directory. Develops identity-centric detections, manages conditional access, and partners with teams to implement security controls. Requires 5+ years of IAM experience, deep expertise in Entra ID, Active Directory, and MFA/passwordless protocols.

Experienced Chief Operating Officer needed for a high-growth Fintech company. Will shape and oversee systems, processes, and people to support business operations and growth. Requires deep understanding of FinTech, software development, and operations management.

Develop and maintain scalable Salesforce solutions using Apex, Lightning Web Components, SOQL/SOSL, APIs, and integrations. Provide expert guidance on Salesforce topics, ensuring adherence to coding standards and quality assurance.

The Site and HR Manager oversees site administration, facilities, employee relations, HR operations, and compliance across all locations. Responsibilities include managing office facilities, utilities, maintenance, and workspace readiness, as well as supporting workforce planning, recruitment, onboarding, and employee offboarding. The role also involves ensuring compliance with EHS, labor regulations, and internal company standards, coordinating workplace safety programs, and managing procurement and logistics.

Experienced Senior Controller needed to manage financial operations for a manufacturing plant. Responsibilities include financial reporting, budgeting, forecasting, cost control, and business partnering with operational leaders.

Doctoral Researcher (Infection Biology) position at the Leibniz-HKI, Jena. The project investigates the impact of dietary fiber on microbiota composition, metabolism, and Candida albicans colonization using mouse models, metabolome analysis, and in vitro experiments.