java English-speaking jobs in Mainz

KoRo seeks a visionary Social Creative Lead to translate brand strategy into engaging social content across platforms like TikTok, Instagram, and LinkedIn. The ideal candidate will lead and mentor a team, drive creative execution based on data analysis, and ensure content is culturally relevant and produced efficiently.

Senior Accountant will oversee accounting operations for Germany, Belgium, and France. Responsibilities include managing general ledger activities, ensuring accurate financial reporting, and maintaining compliance with local statutory requirements. Requires 7+ years of accounting experience, fluency in German and English, and knowledge of German GAAP.

Lead the development and execution of patient advocacy strategies for Hematology-Oncology in Europe. Build and manage relationships with patient advocacy groups and professional societies. Oversee patient engagement initiatives and track outcomes.

Marketing Intern to support design and marketing operations. Create graphics, social media content, presentations, and marketing materials. Support SEO, event organization, and marketing lead tasks. Must be proficient in Adobe Creative Suite and have excellent English skills.

Experienced Cabin Crew members with a valid EASA Cabin Crew Attestation are sought for a permanent, fixed-base position at Marabu Airlines' Frankfurt base. Responsibilities include providing passenger hospitality, ensuring safety and security, and supporting onboard sales. Fluency in English is required, German language skills are welcomed.

UPS Engineer needed for Infrastructure Business Area Project Office. Collaborate with stakeholders to define system requirements, perform site surveys, and develop UPS system configurations. Integrate and configure UPS systems with other power infrastructure. Provide technical consultation on UPS system design, implementation, and lifecycle service strategy. Lead troubleshooting and incident management. Bachelor's degree in electrical engineering or related field required. Minimum 5 years of experience as a Systems Engineer in UPS system design, integration, and maintenance. Strong understanding of power electronics, power distribution, and energy storage technologies. Excellent problem-solving and communication skills.

Designs and develops solution architectures across various technologies, focusing on scalable, secure, and maintainable systems. Collaborates with stakeholders and development teams to ensure alignment with architectural standards. Supports the implementation of architectural concepts and coordinates system component provisioning. Provides consulting and guidance on architectural and security topics. Evaluates and incorporates modern technologies into solution designs.

Experienced Registered Nurse (m/f/d) with minimum 3 years' bedside experience in a hospital setting. Provides clinical case management, communication and coordination, patient advocacy, and quality assurance for the TRICARE Overseas Program. Fluent in German and English required. Hybrid role with hospital visits and remote work, no night shifts or on-call requirements.

The Chief Operating Officer / Chief Financial Officer (COO/CFO) is a senior leadership role responsible for translating the company's strategic plan into operational reality. This role will manage financial strategy, profitability, pricing, funding, and operational execution. The COO/CFO will also oversee legal and data compliance, team and resource management, and process architecture.

Service technician for salt and brine systems. Maintenance, repair, installation, and customer support. Requires technical training, travel flexibility, and strong communication skills.

Operates and oversees concrete mixing machines and batching systems. Ensures precise material proportions and conducts quality checks. Supervises and trains junior staff. Performs equipment maintenance and adheres to safety and environmental standards.

Field Sales Representative will support and develop existing and target customers in the independent retail segment. Responsibilities include acquiring new customers, building relationships, conducting sales presentations, and managing projects. Requires at least 3 years of field sales experience selling capital goods in the German retail sector.

Student assistant needed for a part-time position at a hostel. Tasks include painting, flooring, furniture assembly, plumbing, and outdoor facility maintenance. Must be a registered student with a valid enrollment certificate, B2 German and English skills, and some relevant experience preferred.

Senior Controls/BMS Manager to lead global commissioning activities across complex, large-scale infrastructure projects. Requires deep technical expertise in control systems (BMS/BAS/EPMS/PLC) and a strong track record of delivering high-performance outcomes in data center or similar environments.

Senior Systems Engineer with 7+ years of Linux administration experience sought to manage and optimize on-premise and cloud infrastructure. Expertise in automation tools (Ansible, Puppet, Terraform) and cloud platforms (AWS, Azure) is required.

Postdoctoral Researcher to work on the relationship between populism and EU law. Develop research plan, publish findings, and participate in project events. Requires PhD in law or political science, advanced knowledge of EU law and politics, and strong communication skills.

Senior Business Development Manager (m/f/d) to identify and acquire new customers and projects, develop strategic cooperations, and analyze markets and competitors. Requires a successful life sciences background, several years of experience in biotech CDMO business development, and strong negotiation and communication skills in German and English.

Develop and implement ultrasonic measurement systems for demanding applications. Translate customer requirements into system architectures and define technical specifications.

The Vice President, Pathology provides global leadership for Discovery's pathology function, driving harmonization and optimization of global pathology processes. This role serves as the senior pathology authority and escalation point for complex scientific, operational, and client-related challenges. The VP Pathology is responsible for leading, mentoring, and scaling a global team of pathologists, establishing consistent process harmonization practices, and driving talent development. The position requires a MD or PhD in Pathology, Human Medicine, or related field, with board certification in anatomic pathology (cytology preferred).

Conduct research in reasoning, interpretability, neuro-symbolic methods, and memory to advance LLM/VLMs for unseen tasks, domains, or languages. Publish at top-tier conferences, contribute to teaching, and supervise students.