java English-speaking jobs in Mainz

Senior Recruiting Manager will own the full recruiting lifecycle, from sourcing to closing, for a fast-growing FinTech in Berlin. Responsibilities include active sourcing, conducting structured interviews, and scaling recruiting processes. Several years of recruiting experience, strong active sourcing expertise, and German fluency are required.

Planning Manager to oversee planning and scheduling activities for data center development projects in the UK/France/German regions. Focus on project compliance, oversight of planning and scheduling, collaboration, and reporting. Requires a Bachelor's degree, 5+ years of experience in planning and scheduling for large-scale infrastructure or data center projects, and proficiency in project management software.

Acts as a scientific partner to healthcare professionals, providing expert input on anti-infective therapies. Maintains scientific knowledge in infectiology, communicates with healthcare professionals, and builds relationships with key opinion leaders. Supports investigator-initiated studies and provides scientific input for medical projects.

Lead the Design function within Intercom's AI Group, shaping the behavior and evolution of Fin, the company's AI agent for customer service. Manage a team of AI Designers and collaborate with AI Engineers, Scientists, and Product Designers.

SAP ABAP RAP Developers will build and enhance solutions within SAP S/4HANA environments. Responsibilities include developing applications using RAP, APIs, and integrations, and collaborating with teams on greenfield architecture development. Strong ABAP development experience and proven hands-on experience with RAP are required.

Experienced senior leader needed for Stock & Planning function in a large B2B wholesale organization. Responsible for inventory management, replenishment performance, and leading a team of 20+ professionals. Will implement and manage the Sales & Operations Planning (S&OP) process and ensure alignment between demand planning, commercial objectives, and financial discipline.

Lead a PHP development team, fostering a collaborative culture and driving technical excellence. Design scalable software architectures, optimize processes, and mentor team members.

Senior / Principal FACTS System Design Consultant will design and implement FACTS systems for electricity networks. Responsibilities include feasibility studies, system and equipment design, system studies and modeling, and control and protection strategies. The role requires a master's degree or PhD in Electrical Engineering and 7+ years of experience in FACTS projects.

Manages HR operations for European DE and NL subsidiaries, ensuring compliance with regulations. Oversees end-to-end HR processes, compensation consultation, and employee relations. Requires 5+ years of HR experience, German labor law expertise, and fluency in German and English.

Information Security Engineer will perform technical analysis of systems architectures, collaborate with stakeholders on security topics, and enhance security operations. Responsibilities include risk management, incident response, and implementing technical and organizational security measures.

Develops marketing strategies, creates content, and manages relationships with key influencers. Executes SEM campaigns, optimizes content for SEO, and collaborates with design and development teams.

Project Manager to plan, execute, and manage substation projects within Germany's energy rollout. Lead interdisciplinary teams, coordinate with stakeholders, and ensure project adherence to quality, deadlines, and budget. Requires several years of project management experience, excellent communication and negotiation skills, and fluency in German.

The Global Sales Specialist supports Hyatt's hotel conversion and pre-opening activities, managing group leads and coordinating transient RFP processes. This role acts as a liaison between Global Sales teams and hotels, ensuring commercial readiness and driving revenue generation.

HR Generalist to support a growing team developing European vehicles. Responsibilities include recruitment, onboarding, employee relations, performance management, training, and HR administration. Must have 2+ years of HR experience in Germany and knowledge of German employment law.

Office administration, accounting, and HR support role. Experience in office administration, accounting, and HR required. Proficiency in MS Office, English, and German.

The European Institute of Policy Research and Human Rights seeks a Junior Research Fellow to conduct research in a chosen area, develop policy recommendations, and contribute to publications.

Experienced Commissioning Manager needed for a long-term data center project in Frankfurt. Lead mechanical & electrical commissioning, manage vendors, and coordinate with the GC, client, and project teams.

Visualization Designer will create automotive videos, animations, and real-time experiences for design communication and presentations. Responsibilities include scene setup, lighting, rendering, and post-production.

Manages product groups, sets long-term strategy, and aligns with business goals. Defines service specifications, creates value propositions, and provides expert support to sales. Drives innovation, monitors profitability, and coordinates promotional needs. Requires a bachelor's degree, minimum five years of experience in product line management, and strong analytical and communication skills.

Senior Investment Controller needed to design and implement a comprehensive investment controlling framework for a dynamic venture portfolio. Drive financial transparency and strategic decision-making by providing insights to management and investment committees.