java English-speaking jobs in Mainz

Associate Workplace Operations & Experience Coordinator manages office maintenance, community engagement logistics, onboarding, events, and safety protocols. This part-time role requires strong execution, problem-solving, and customer service skills.

Assist in planning and delivering international training events by preparing materials and identifying experts. Create e-learning content and support publications through research. Requires current university enrollment, native English, and proficiency in Microsoft Office.

This role serves as a Prepositioned Training Fleet Equipment Set Action Officer, overseeing ground maintenance operations. Duties include developing policies, managing logistics, acting as COR/BO, and supervising personnel. B2 English and C2 German proficiency are required.

Enrolled technical students in sales fields are sought for this Customer Service & Sales Internship. Candidates should have experience in customer interaction or sales, enjoy technical and sales topics, and possess strong German and English skills.

Description What the job does: As a Tilbury Artist (Retail Makeup Artist) you are responsible for promoting and creating makeup magic in store. Always representing the Charlotte Tilbury 5 P’s Professional, Proactive, Passionate, Prescriptive and Potential.

Automotive Engineering Intern to build and tune a Formula Student race car model in BeamNG. Develop physics, implement simulation scenarios, and document the process for virtual testing. Requires automotive or mechanical engineering studies.

PhD student to study Fe-bearing materials at high photon energies. Participate in R&D of X-ray scattering experiments and dynamic compression experiments. Prepare PhD thesis and participate in the TU Dortmund PhD program.

Shape and execute the product vision for VWR Brand private label products across Europe. Own the full product lifecycle, driving growth and market penetration through data-driven strategy and cross-functional leadership.

Drive B2B business growth in Germany for connected weather stations and SaaS. Develop territory, build distribution networks, and manage the full sales cycle. Requires 3-5 years in B2B sales, ideally in AgTech, with native German and fluent English.

Research Assistant needed in chemistry, physics, civil engineering, mineralogy, or materials science. Responsibilities include project implementation, sample preparation, and material analysis using techniques like ToF-SIMS and XRD.

Experienced Full stack Developer needed for AI Harness Codebase Hardening. Tasks include optimizing Python/Node.js backends, Dockerizing for AWS, and building TypeScript front ends from Figma designs. Requires strong full stack and cloud migration experience.

PhD student position in medical imaging and elastography. Develop ultrasound and MRI techniques for quantitative tissue mechanics investigation. Requires background in relevant science/engineering and interest in translational research.

This role owns global sales reporting, transforming complex sales data into insights for management. You will build dashboards in Power BI and Tableau, bridging Sales, Finance, and IT. Requires a degree in a relevant field and experience in Sales Finance or Business Analysis.

Electrical Technician will receive full training on HV cables and testing. Responsibilities include testing and maintaining electrical cables, and traveling throughout Germany and Europe. Requires previous technical experience in electrical specialism, a full driving license, and fluency in German.

Associate Expert R&D Molecular Design focuses on biologics drug discovery in Immunology and Hematology. Responsibilities include high-throughput protein interaction screening using BLI and HT-SPR.

Engaged Working Student Office Manager supporting HR with administrative duties. Responsibilities include office organization, workflow management, and event planning. Requires university enrollment, strong organization, and fluency in English.

Structural Analysis Engineer role involving development and validation of stress methods. Responsibilities include software lifecycle support and structure analysis project work. Requires studies in Aerospace or Mechanical Engineering, FEM analysis experience, and proficiency in Python, C++, and FORTRAN.

Supports efficient payroll operations and HRIS development. Coordinates payroll data, activities, and communication with stakeholders and external providers. Administers HR systems, prepares documentation, and maintains employee records. Requires experience in German payroll, HR operations, and HRIS systems. Fluent in Mandarin and German, English is a plus.

Lead end-to-end design for Reporting, Sales, and Fiscalisation domains. Drive unified, clear data experiences for merchants. Requires 5+ years as a Product Designer with expertise in complex digital products.

Senior Motion Designer needed for a Berlin brand studio. This role involves designing animation systems, building motion worlds, and translating strategy into motion-led brand expression. Strong skills in After Effects, Final Cut, and 3D are required.