java English-speaking jobs in Mainz

Leads global corporate strategy projects, defining and implementing company strategy. Drives strategic planning, identifies growth opportunities, and analyzes market trends. Collaborates with senior leadership and stakeholders to execute strategic initiatives.

Senior Full Stack Developer needed for remote role. Fluent Dutch or French required, with understanding of the other. Experience with Typescript, Python, AWS, and Angular is essential. Must have a strong understanding of TDD and passion for continuous improvement. Experience with Aurora, DynamoDB, Athena, Apache Parquet, AirFlow, ETL, and big data processing is a plus.

Remote Sales Consultant to drive client acquisition by converting warm leads into bookings. Minimum 2 years' experience in direct sales required.

Student assistant will support research in joining and coating technology, including familiarization with welding processes, development of AI models, and research into additive manufacturing.

Leads a team of beverage product developers focused on delivering innovative solutions for global customers across EMEA. Combines technical leadership, customer insight, and innovation management to drive the development of differentiated beverage concepts and formulations.

Systems Engineer to design, develop, and qualify feed systems for electric propulsion thrusters. Experience in aerospace systems engineering, fluidic or propulsion subsystems, and industrialization is required. Full lifecycle responsibility from requirements engineering through testing and verification.

Freelance legal professional needed to review and refine AI-generated responses related to legal matters, contracts, compliance, and regulatory frameworks. Must be based in the EU or UK and available 8-20 hours per week.

Shape and scale a strategic growth pillar as Senior Product Owner for the myEW Account. Translate business and customer needs into digital solutions that drive customer loyalty and revenue growth. Own the product vision, roadmap, and backlog, and drive the implementation of loyalty mechanisms.

Leads and coordinates operational delivery of medical schemes conformity assessment activities under SGS NB 1639. Ensures effective performance of clinical, audit, technical, and product assessment functions, driving operational excellence, regulatory compliance, and strategic resource management. Oversees technical teams, manages performance, and supports development of processes, systems, and personnel.

Research Assistant (m/f/d) for a 3-year project focused on numerical simulation of microbial transport in porous media and carbonate mineral precipitation. Responsibilities include developing numerical models, presenting research results, and carrying out administrative tasks.

Support the smooth operation of a hotel shop, advise guests, and manage product inventory. Collaborate with sales on promotions and handle merchandise management, pricing, and invoice verification.

Leads a team of engineers developing advanced composite space tanks, translating company goals into team priorities and ensuring product performance.

The Deputy Head of Investment Promotion supports the Head of Investment Promotion in driving investment promotion activities in Germany, Austria, Czechia, Hungary, Poland, the Slovak Republic, Slovenia, and Switzerland. Responsibilities include implementing the annual business plan, developing networks, organizing investment promotion visits, and collecting market intelligence.

Dutch and English speaking Sales Agent needed in Berlin. Contact clients, analyze and optimize digital marketing campaigns, and identify sales opportunities. Must have at least 1 year of sales experience and a valid full-time work permit for Germany.

Senior Project Manager will lead digital projects from conception to market entry using low-code technologies. Responsibilities include steering project teams, communicating with stakeholders, and anticipating problems.

Working Student Operational Excellence supports marketplace performance by improving transparency, efficiency, and scalability. Tasks include documenting processes, analyzing KPIs, and driving mini-projects. Must be a current university student with strong analytical skills and fluency in English.

Develop process solutions for biopharmaceutical customers, create design documents, and perform cost analyses. Focus on single-use design concepts, considering safety, efficiency, and quality. Provide technical support and collaborate with cross-functional teams to clarify customer requirements and drive consumables strategies. Manage design documents, support customer meetings, and participate in on-site visits. Analyze market trends, evaluate products, and implement feedback loops.

Working Student / Master Thesis / Intern will contribute to research on quantum compilation, focusing on improving and optimizing quantum compilation stacks for early fault-tolerant quantum computers. Responsibilities include developing reinforcement learning and machine learning methods for quantum circuit design, implementing quantum error correction codes, and integrating new circuit design methods into existing software. Applicants should have experience in Python programming, quantum computing libraries, and machine learning algorithms.

The Leipzig Cohorts and Trial(ist)s (LeiCoT) program seeks a recognized medical specialist with a strong research background in metabolism, brain/heart, or cancer. The program offers a six-year, fixed-term position with 50% research and 50% clinical work.

Senior Accountant / Senior Accounting Manager will lead the accounting team for Avia's northern Germany company cluster, responsible for accounting, legal reporting, and team management. The role involves close collaboration with other departments and the Group Accountant.