java English-speaking jobs in Mainz

Doctoral Researcher (Ph.D. Candidate) in digital platform ecosystems. The position is part-time (75% FTE) and fixed-term for three years. Excellent analytical skills, research experience, and a strong interest in strategic leadership, executive cognition, and communication are required.

Shipping Operator to manage and optimize a fleet of 6-10 time-chartered vessels. Responsibilities include vessel employment, voyage calculations, freight economics, and liaising with owners, charterers, and terminals. Requires experience in tanker and/or LPG shipping operations, chartering, or shipbroking.

Experienced hotel leader with a strong Rooms background seeks to manage a lifestyle hotel in Frankfurt. Full P&L responsibility, leading a team, optimizing Rooms operations, and driving business growth are key responsibilities.

Customer Success Associate supports enterprise customers with onboarding, implementation, and ongoing support. This role involves managing customer communication, driving product adoption, and collaborating with cross-functional teams.

Senior Legal Counsel provides legal support across Central and Eastern Europe, covering commercial, regulatory, and corporate matters. The role involves drafting, reviewing, and negotiating commercial agreements, advising on corporate governance, and managing legal risks. Requires a qualified lawyer with 8+ years post-qualification experience, fluency in English and German/Polish, and experience supporting international businesses.

Planning Manager to oversee planning and scheduling for data center development projects in the UK/France/German regions. Focus on assessing project reports, ensuring compliance with standards, and optimizing project timelines. Requires 5+ years of experience in planning and scheduling for large-scale infrastructure or data center projects and proficiency in project management software.

Lead the end-to-end delivery of renewable energy projects, including BESS and Solar PV technologies. Develop project plans, manage budgets, and oversee system integration. Communicate project progress and mitigate risks.

M&A Director to drive and execute buy-and-build strategy for a fast-growing IT-Services platform. Responsibilities include identifying targets, leading the full M&A process, and managing cross-functional teams. Requires proven M&A experience, strong financial modeling skills, and fluency in German and English.

Construction Manager to lead site delivery of large-scale data center projects. Manage site safety, quality, program delivery, and multidisciplinary teams. Oversee subcontractors, control costs, and ensure QA/QC processes are followed.

Planning, Logistics & Stock Manager will manage end-to-end production, demand, and supply planning, inventory control, and logistics coordination. Responsibilities include overseeing inventory management, coordinating with procurement and supply chain teams, planning logistics operations, and ensuring timely delivery. Requires a Bachelor's degree in a related field and 7-12 years of experience in supply chain, logistics, inventory management, or operations. Strong analytical, problem-solving, and coordination skills are essential. Fluency in English is required.

Lead the budgeting, forecasting, and long-range planning processes for a fast-growing tech services business. Develop financial models to support growth, pricing, and investment decisions. Provide commercial insight to the Board and senior stakeholders.

Azure Backup & Storage Solutions Architect needed for remote role. Design, implement, and operate secure, scalable solutions across hybrid cloud environments. Expertise in Azure Backup, Azure Storage, and hybrid environments required. Strong troubleshooting and problem-solving skills essential.

The Commercial Lead will drive Immedica's presence in rare endocrinological and neurological diseases in Germany, focusing on CAH, AI, CDD, and potential future indications. This field-based role involves building relationships with key stakeholders, supporting disease education, and ensuring market access. The role includes leading Key Account Managers, developing territory plans, and collaborating with cross-functional teams to achieve commercial objectives.

Senior Agentic AI Process Designer will analyze existing processes, identify AI-based use cases, and design future-oriented process solutions. You will collaborate with Process Owners, AI Product teams, and IT to ensure AI is applied where it creates real value across the BMW Group.

Project Developer to support the development of primarily onshore wind projects in Germany. 2-3 years' experience in renewable energy or infrastructure development required. Exposure to permitting and project coordination in Germany is essential.

Drive revenue growth for Milence's commercial operations in Southern Germany. Develop and execute sales strategies targeting fleet and logistics sectors. Proven experience in truck sales and exceeding sales targets required.

Customer Onboarding Specialist will guide German-speaking customers through the adoption of a SaaS platform, ensuring successful property setup and activation. This role involves training, technical configuration, and problem-solving to optimize customer experience and drive bookings.

Lead the build and growth of a BESS platform within an established European energy business. Full ownership of revenue and market expansion, including building a sales engine, managing EPC and partner relationships, and closing high-value deals.

The Ecommerce Lead will own the commercial performance and day-to-day operations of direct-to-consumer online channels for a growing portfolio of pet nutrition brands. Responsibilities include driving revenue growth and margin improvement, platform management, merchandising, and collaborating with internal and external teams. Must have 7+ years of ecommerce experience, strong platform management skills, and a data-driven mindset. Fluent in English & German is required.

Conduct short, engaging interviews in German with children to gather feedback and insights for AI development in education.