java English-speaking jobs in Mainz

TikTok LIVE Operations team seeks a Gaming Influencer Operations Manager to discover, recruit, and support talented live streamers in the DACH region. This role involves creator onboarding, performance analysis, and strategic guidance to foster sustainable livestream careers.

Support the development of a software platform for quantifying the CO2 footprint of manufacturing processes. Implement backend and web application features, contribute to backend services and APIs, and integrate frontend and backend systems.

Review, evaluate, and annotate AI-generated German text for accuracy, fluency, and legal alignment. Provide feedback on grammar, semantics, style, and tone.

Design and develop branded assets, templates, and guidelines for the digital euro communications plan. Collaborate with stakeholders and agencies to create audiovisual and social media content aligned with the digital euro brand. Manage brand assets and analyze the performance of digital communications.

As a Translational Research Liaison, you will identify, establish, and lead research collaborations with academic institutions, clinical centers, and disease experts. You will build business cases, act as a scientific expert, and deliver presentations to internal and external audiences.

Deliver meals to customers in Bielefeld using your own bike or scooter. Must be at least 18 years old, physically fit, and fluent in German or English.

Area Sales Manager (m/f/d) – LATAM and Brazil will provide sales support to dealers and sales companies in Latin America and Brazil. Responsibilities include product and application consulting, training sales partners, and supporting the preparation of offers and tenders. The ideal candidate will have a degree in mechanical or industrial engineering or equivalent experience, fluency in English and Spanish, and a high willingness to travel.

Lead and scale the design function at LiveEO, shaping the user experience of AI-powered satellite analytics software. Define design vision, processes, and metrics while mentoring a team of product designers. Contribute hands-on design work and collaborate with cross-functional teams to align design efforts with product strategy and business goals.

Manage communications, assist customers, and ensure smooth administrative operations for a remote team.

Global Procurement Manager responsible for subcategories within Finished Products portfolio. Develops and implements global sourcing strategies, manages international suppliers, and collaborates with cross-functional stakeholders.

Senior Manager, Steel will supervise construction & inspection of hull construction at Meyer Werft, Papenburg. Responsibilities include providing surveying, inspection, and commissioning services, ensuring environmental compliance, and supporting ship design, plan approval, commissioning, sea trials, and final acceptance. Requires a degree in a relevant engineering discipline, welding technology, and NDT inspections, as well as proven experience in the marine industry.

Develop and enhance RAG platforms, design AI agents, and contribute to knowledge graph and advanced AI initiatives. Experience with Python, asynchronous programming, and modern Python tooling is required.

Test Automation Engineer will design, build, and operate scalable test automation frameworks for enterprise environments. Develop and maintain automated test cases and perform technical software testing for tailor-made solutions, SAP environments, and complex system landscapes. Collaborate with developers, architects, and project managers in cross-functional teams.

Provides after-market service and support for Plug Power's GenFuel hydrogen utility infrastructure. Performs maintenance, troubleshooting, and training on H2 systems. Interprets diagrams, provides emergency support, and trains other personnel. Requires an associate's degree or equivalent experience and the ability to travel up to 100%.

Support a team applying game theory and analytical approaches to complex negotiation and procurement challenges for clients. Responsibilities include developing game-theoretic approaches, preparing presentations, contributing to tender processes, and supporting negotiation strategies.

Drives new OEM business and growth for Custom Photonics Solutions across Europe. Develops markets, customers, and projects, qualifies customer requirements, and delivers tailored photonics solutions. Acts as Key Account Manager for strategic customers and collaborates with cross-functional teams. Requires 5+ years of account management experience, a degree in Physics or a related field, and strong communication and data analysis skills.

Develop and optimize machine learning algorithms for medical imaging to enhance ophthalmological diagnostics. Collaborate with cross-functional teams to integrate AI solutions into medical workflows. Analyze large datasets to train and validate AI models for detecting eye-related conditions.

As an HR Business Partner, you will lead all HR functions for a team of 50 employees, managing the entire employee lifecycle and providing support to staff and management. Responsibilities include talent acquisition, employee administration, performance management, and compensation and benefits administration.

Develop and execute social media strategy to grow brand and engagement across all platforms. Create and curate video and visual content for various platforms. Engage with the community, track KPIs, and stay current on social media trends.

The Sales Director (Country Manager – Germany) will build and scale the offline sales and channel ecosystem in Germany. This role involves developing and executing sales strategies, managing dealer networks, and leading a local sales team.