java English-speaking jobs in Mainz

Senior Research Consultant will lead and contribute to research and consulting projects for EU institutions and public-sector clients. Responsibilities include leading workstreams, client engagement, report writing, conducting research, and supporting junior team members. Requires a Master's or PhD in a relevant field and 4-6 years of experience in a similar role.

Leads complex consulting engagements for Kyndryl's largest accounts, driving profitable growth and client success. Manages multi-disciplinary teams, builds CXO relationships, and delivers high-quality client work. Requires 10+ years of experience in technology consulting, strong business development skills, and deep insurance industry knowledge.

Regional Loss Prevention Manager leads security and loss prevention across Germany, Austria, and Central & Eastern Europe. Focus areas include shrink reduction, crime mitigation, risk assessments, investigations, and crisis response.

Data Analyst (m/f/d) will explore datasets, evaluate data quality, and apply statistical methods to understand consumer behavior. The role involves collaborating with data scientists and engineers to build analytical solutions, visualize data, and provide data-driven insights. Requires a Master's degree in a numerate field and 2+ years of data analysis experience.

Process Planner / Production Planner (m/f/d) for a full-time position (35 hours/week) with experience in the automotive sector. Responsibilities include planning, optimizing, and industrializing manufacturing and assembly processes. Experience in the Mercedes-Benz environment is desirable.

Leads and scales a platform-driven organization covering viral vector process development and GMP manufacturing. Oversees the full lifecycle of client programs, ensuring reliable, scalable, and high-quality GMP execution.

Dock Tech supports efficient dock operations by managing inbound and outbound rental equipment, performing shipping and receiving tasks, and maintaining a clean work area.

Senior HR Business Partner will partner with senior leaders across two locations, driving the people agenda for organizational design, change, talent, and leadership development. This role requires significant HRBP experience in an international, matrixed organization, strong German employment law knowledge, and fluency in German and English.

Supports project controlling activities, data management, and process execution within the Finance function. Contributes to reliable reporting, stable monthly charging processes, and data quality improvements.

Full-Stack Developer needed for a remote position at Spinlab, a data analytics company. Develops and maintains a B2B web analytics platform using TypeScript, Node.js, NestJS, ClickHouse, Kafka, Redis, and a browser SDK. Requires 4+ years of TypeScript/Node.js experience, 2+ years with NestJS, and production experience with clustered ClickHouse and Kafka. Must have experience with browser internals, distributed systems, and Docker. Strong written English skills are required.

Training Coordinator needed to support NIIT's customer in Germany. This role involves analyzing training needs, coordinating session delivery, and collaborating with the customer's learning delivery team. Requires 2-4 years of experience in learning delivery management, fluency in German and English, and proficiency in MS Office.

Drive business growth in the manufacturing sector by selling AI-led manufacturing and industrial software solutions. Execute sales and business development within assigned regions, building and advancing the sales pipeline. Cultivate strategic relationships with decision makers at C-level and VP levels across various departments.

Working Student IT Support will assist the Infrastructure team with first and second-level support for end-users, including diagnosing and resolving software and hardware-related problems. Support with hardware preparation and equipment setup and configuration. Develop and maintain technical documentation and provide technical training to employees.

Associate Editor (m/f/d) to manage the publication of mathematics books from proposal to publication. Responsibilities include evaluating proposals, managing peer review, liaising with authors, and collaborating with editorial boards.

Senior Product Manager will define and execute the strategy for N26's payment platform, focusing on scheme integrations and core payment components. Responsibilities include driving the product roadmap, collaborating with engineering and design, and ensuring regulatory compliance. Requires 5+ years of product management experience, ideally in FinTech, banking, or online retail, with hands-on experience in payment scheme integrations.

Working Student supports the Customer Success team in managing client relationships. Responsibilities include preparing client-facing materials, analyzing data, and assisting with onboarding and meetings. Must be enrolled in a Bachelor's or Master's program and have strong communication and data analysis skills.

Service Utility for AIDA Riding Team onboard. Performs painting, cleaning, and basic maintenance tasks as assigned. Requires 2-3 years of experience in manual work and fluency in English.

Customer Support Specialist needed for a growing health and wellness company. Provide customer service via multiple channels including email, phone, and messaging apps. Support customer orders, answer product questions, and collaborate with internal teams. Fluent German and Russian required, good English skills necessary.

Working student supports an implementation project automating data flows within the Supply Chain. Assists with project management, onboarding partners, and monitoring data flows. Requires strong analytical and communication skills, proficiency in German, and experience with data mapping and transformation.

Chief of Staff will partner with the CEO to drive commercial and organizational development for a global B2B software provider. Responsibilities include developing go-to-market strategies, scaling the sales organization, and implementing performance management systems.