java English-speaking jobs in Mainz

Provide technical leadership for MES workflows, integrations, and shop-floor systems. Collaborate with architects, business teams, and vendors to ensure system reliability. Guide the team on development, AMS support, and troubleshooting.

Provides strategic and operational support to two Co-CEOs & Co-Founders. Manages complex calendars, prioritizes tasks, and acts as a central point of contact for stakeholders. Prepares presentations, manages communications, and supports project implementation.

Freelance lecturers are sought for Engineering and Energy Management programs. Responsibilities include teaching, curriculum development, examination design and grading, and student dissertation supervision. Applicants must have a PhD or PhD candidacy, prior university teaching experience, and fluency in English.

Collaborate on complex strategy consulting projects, providing impactful solutions for BASF businesses and functions. Identify potential improvements and advise management teams. Apply project management and consulting methodologies, communicate clearly, and work with BASF Executives on strategic projects.

Develops and manages Cafeyn Premium distribution partnerships across Europe, with a focus on the DACH region and verticals such as Telecom, Banking, Insurance, Pay TV, and Retail. Leads the full sales cycle, from prospecting and pitching to closing deals and managing executive relationships. Collaborates cross-functionally to structure deals and ensure smooth partner activation.

Aircraft mechanics and electronics technicians (CAT A, B1, B2) needed for maintenance and repair work. Must possess a valid EASA license and be able to perform fault analyses, troubleshooting, component installation, and aircraft release documentation.

This PhD position within the TRANSFER research project focuses on the retention of radium (226Ra) and strontium (90Sr) in carbonate-bearing claystones. The successful candidate will conduct experiments and simulations to understand the processes involved and their impact on radionuclide migration in geological repositories. Responsibilities include conducting sorption/desorption and recrystallisation experiments, analyzing samples using advanced analytical techniques, and applying geochemical-thermodynamic modelling.

Manage a structured sales approach for designated accounts in Germany and Austria. Implement sales strategies, handle sales and after-sales, and provide technical support.

Provides administrative and logistical support to the MTRI team. Responsibilities include organizing marketing activities, managing office supplies, handling correspondence, and planning events. Requires advanced MS Office skills, fluency in English and German, and strong organizational and communication skills.

Legal Officer needed for a client of TechBiz Global. Provides legal advice, drafts contracts, ensures compliance with regulations, and supports corporate governance. Requires a law degree, 5+ years of experience, fluency in English, and MiFID II certification.

Lead and mentor a team of developers, driving architectural decisions and coding standards. Design, develop, and maintain scalable web applications, architecting complex systems for reliability and security. Conduct code reviews, develop automated tests, and collaborate with teams to deliver high-quality solutions.

Key Account Manager (m/f/d) needed to build relationships with strategic partners, ensure client expectations are met, and communicate stakeholder insights. Requires a degree in business administration, agriculture, sustainability, or equivalent, plus 3+ years of experience in a similar role. Must have strong knowledge of food supply chains and retailers, and proficiency in English and German.

Leading Scientist and Group Leader for the Small Quantum Systems (SQS) instrument at European XFEL. Responsibilities include scientific exploitation of the SQS instrument, strategic leadership of the team, and contributing to the long-term vision of the facility. Requires a proven record of scientific excellence in AMO physics, experience with synchrotron or laser radiation applications, and strong leadership and communication skills.

Stranger Soccer seeks a passionate entrepreneur to open and operate their business in Berlin. The License Owner will build and lead a team, secure game venues, and drive sales and marketing to introduce Stranger Soccer as a convenient way to play football.

Concept Designer (m/f/d) needed to develop and shape creative concepts for media scenography, exhibition design, and immersive experiences. Translate client goals and audience insights into clear conceptual frameworks and visual presentations. Collaborate with Creative Direction, Content, and Technical teams to ensure concept consistency and feasibility.

Develop and maintain long-term relationships with key clients to achieve business objectives. Drive revenue growth and profitability through strategic account development and value-based selling.

Production employee needed for a fast-growing deep-tech company. Assemble core components and cryostats, following production documentation. Provide support to Procurement and Testing & Quality Control teams.

Lead all tax activities in the DACH region, ensuring compliance, managing tax risks, and serving as a strategic finance partner.

Team Lead for Automotive Administration to oversee administrative processes, lead a team, ensure order processing accuracy, and act as a key contact for customers and partners.

Finance Specialist SAP - Financial Accounting will design and maintain SAP FI processes within the new S/4 HANA program. Responsibilities include acting as a subject matter expert, managing the full project life cycle, and collaborating with business partners.