java English-speaking jobs in Mainz

IKONO seeks a Country Marketing Manager in Berlin to lead German operations. This hands-on role requires strategic planning, data analysis, sales, and partnership development. The ideal candidate is a "Sales-Marketer" with a deep understanding of Berlin's social culture and a proven track record in marketing, partnerships, or sales within entertainment, hospitality, or lifestyle.

Provides customer service support via retail channels, responding to tickets and coordinating with technical teams. Requires advanced German and English language skills, strong Excel proficiency, and experience in customer service, after sales, or administrative support.

As a Hard Rock Cafe bartender, you will prepare drinks, serve food, handle payments, and provide excellent customer service. You will also maintain a clean and organized bar area, stock inventory, and follow all safety and sanitation standards.

Experienced HR Manager needed for a permanent position in Karlsruhe. Lead day-to-day HR operations, partner with senior leadership, and ensure compliance with German labor laws. Proven HR experience in automotive manufacturing, particularly plastics or metals, is highly desirable.

Leibniz University Hannover seeks a distinguished researcher in Artificial Intelligence (AI) for a W3 professorship. The successful candidate will have expertise in one of the following key areas: Embodied AI, Neurosymbolic AI, Agentic AI, Trustworthy AI, or Generative AI. The position requires research, teaching, and collaboration within the faculty and across disciplines.

Drive sales and manage customer relationships in the construction, mobility, and industry sectors. Manage and grow customer platforms, focusing on high-potential customers and application-based selling. Promote Berner as a premium brand and handle objections, delivery, and quality claims. Analyze sales area KPIs and report to superiors. Collaborate with the sales team to achieve performance targets and align customer priorities across channels.

Lead the end-to-end certification of in-vehicle infotainment products, including Google Mobile Services, Compatibility Test Suite, Vendor Test Suite, and Google Automotive Services. Collaborate with software teams to resolve compatibility and API-related issues. Prepare technical documentation and test reports to support certification progress. Communicate with overseas OEM customers and Google teams to resolve technical and business issues.

Senior Recruiting Manager will own the full recruiting lifecycle, from sourcing to closing, for a fast-growing FinTech in Berlin. You will build teams, conduct structured interviews, and improve recruiting processes. Several years of recruiting experience, strong active sourcing skills, and German fluency are required.

Product Manager responsible for driving commercial success of loaders and backhoes throughout their lifecycle. Develops product strategy, collaborates with R&D and Sales & Marketing, and tracks product performance. Requires a bachelor's degree, 2-4 years of product management experience, and industry knowledge.

Shiftmove is on a mission to transition from a decentralized group of companies into a unified, high-performance Global Finance & Accounting function. As the Head of Record to Report, you will be a key driver of this transformation, taking on interim leadership to build a scalable, group-first reporting engine.

Senior Owner's Engineer representative responsible for stakeholder management, connection agreement handling, and ensuring cross-site consistency. Leads client negotiations, technical clarifications, and alignment with grid operators. Oversees project delivery across five sites, including schedule, risks, and commissioning readiness. Requires 10+ years in utility energy infrastructure with 5+ years as a PM on EPC/OE projects. Proven leadership on grid-connected HV/BESS/substation projects. Strong German/English communication skills.

As a Commercial Finance Business Partner, you will be a trusted advisor to the VP and management team in Germany, providing financial insights and driving sound business decisions. You will lead the financial planning process, support business cases, and collaborate with cross-functional teams to achieve financial and non-financial targets.

Leads strategic engagement with medical societies and alliances, driving innovative collaborations to advance GSK's healthcare priorities. Develops and implements strategic frameworks for partnerships, leads KOL and academic collaborations, and ensures compliance for all external collaborations. Requires an advanced degree in Life Sciences, Medicine, or a related field and proven experience in strategic partnerships, medical affairs, or healthcare collaborations.

The Strategic Account Manager identifies and develops data center project opportunities in Northern Europe. This role focuses on early engagement with colocation operators, design firms, and general contractors to define where Danfoss solutions can add value. The position requires a Bachelor's degree, minimum three years of commercial HVAC/R industry experience, and fluency in English.

As a Sales Stylist, you will provide exceptional customer service, share product knowledge, and assist with store operations. You will help customers find their perfect fit and contribute to a welcoming shopping experience.

Design, implement, and execute tests for robotics and cloud-based applications. Collaborate with software and hardware teams to ensure product quality. Troubleshoot system and product design issues. Support customer on-site for accelerated time-to-market.

Lead User Experience Researcher (VP) will design and execute research studies to identify customer needs and behaviors for a new digital bank in Germany. Collaborate with product leadership and leverage expertise in UX research and the German banking landscape.

Develop and implement real-time algorithms for embedded control systems. Translate product requirements into performance specifications and design robust software architectures.

Field Clinical Specialists provide clinical training on transcatheter heart valve technology to physicians and hospital staff. Responsibilities include case management, training curriculum development, and supporting physicians in achieving expert proficiency. Requires a bachelor's degree, 3+ years of related medical device or clinical experience, and a valid driver's license.

As a Working Student – Finance & Operations, you will support the financial and operational backbone of GreendaAI during its growth phase. You will assist with financial reporting, invoice management, cash flow monitoring, and process improvement.