java English-speaking jobs in Mainz

Warehouse worker needed for full-time or part-time shifts. Duties include unloading, lifting, transporting, scanning, and sorting packages. Must be able to stand and walk for extended periods, lift up to 15kg, and follow safety guidelines. Must be 18 years or older and proficient in German and/or English/Polish.

Warehouse Worker (m/w/d) needed for a global e-commerce logistics specialist in Herrenberg. Tasks include unloading parcels, packing, and scanning. Experience as a warehouse worker is an advantage. English or Hindi language skills are required.

Leads the Independent Aftermarket portfolio for the full Clarios product line, overseeing P&L and driving product strategy, lifecycle management, and market success across EMEA. Manages a team of five product specialists and analysts, collaborating cross-functionally to support launches and lifecycle activities. Conducts market and competitor analyses, defines KPIs, and reports strategy, results, and plans to C-level management.

Part-time Airport Agent supporting Lead Agents in delivering a safe and first-class airport experience. Responsibilities include providing customer service, performing security functions, and assisting with various airport operations. Must have excellent interpersonal skills, be able to handle stress effectively, and communicate in English and German.

Lead materials development activities for Corning Optical Communications globally, applying polymer science and engineering expertise to support new product development and existing products. Assist with polymer compound selection and evaluation for cable applications and serve as a materials subject matter resource for product and project engineers. Conduct research, propose experiments, analyze data, and collaborate with internal teams to provide polymer materials fundamental understanding and development support. Interface with suppliers to test and evaluate new materials and resolve problems.

Unpaid, 3-month remote internship with Culture Vitale, a European startup focused on workplace wellbeing. Assist with marketing, sales, operations, events, and community. Tasks include social media management, content creation, lead generation, and event coordination. Must be highly organized, detail-oriented, and comfortable working independently. Native German and fluent English required.

Supplier support engineer for bogie brake components. Develops and supports bogie brake components and systems, ensuring compliance with requirements. Clarifies and supports suppliers on technical aspects, reviews supplier documents, and provides technical support for quality milestones.

Drive sales of high-value capital equipment within the Enabling Technologies portfolio. Manage existing accounts and identify new business opportunities. Lead complex sales cycles, build business cases, and negotiate contracts.

Provides safe and professional transportation for senior leadership, Shareholders' Committee, and VIP guests. Coordinates complex travel, logistics, and vehicle maintenance.

As Trade & Customs Specialist, you will shape standards, manage customs authorizations, and oversee key compliance processes to ensure audit readiness. You will monitor bonded warehouse activities, fulfill AEO-C obligations, and act as a point of contact for customs authorities.

The Concierge (m/f/d) creates memorable guest experiences at Wertheim Village, providing personalized recommendations and support. This role involves promoting Village services, responding to guest inquiries, and collaborating with internal teams to ensure exceptional service.

Conduct research on satellite-to-vehicle communication solutions based on 6G networks. Develop and implement algorithms for handover mechanisms between terrestrial and non-terrestrial networks. Validate concepts through simulations or prototypes. Contribute research results to 3GPP studies and working groups.

Drive strategic growth for WALLIX in the DACH region by expanding enterprise accounts across IT and OT environments. Develop and manage a portfolio of strategic accounts, identify and close high-value opportunities, and build strong executive relationships.

As Chief of Staff to the CEO, you will drive strategic initiatives, support M&A and business development, and ensure operational excellence. You will partner with executive leadership to tackle complex challenges and optimize company operations.

Research Associate in Theoretical Chemistry / Computational Materials Modelling sought for a part-time, fixed-term position (3 years) at Friedrich Schiller University Jena. The successful candidate will conduct quantum-chemical calculations related to ammonia synthesis and solid proton conductors, characterize structures, and elucidate proton transport.

Supports Go-To-Market Managers for Originals and Basketball categories in Central Europe. Assists with developing and implementing category plans, collaborating with sales and marketing teams, and analyzing market data.

Senior Procurement Manager to lead procurement strategy for large data center construction projects. Responsibilities include procurement governance, package strategy, subcontract tendering, supplier risk management, and project support. Requires a degree in a related field, 10+ years' procurement experience in construction or engineering, and strong knowledge of subcontract procurement and negotiation.

ADAS Vehicle Test Engineer will integrate, validate, and verify ADAS systems at vehicle level, ensuring compliance with OEM requirements, European regulations, and safety standards. The role requires close collaboration with OEM customers, internal development teams, and production sites.

Account Manager responsible for driving sales growth and customer satisfaction across assigned automotive accounts. Leads the sales process, manages relationships with key stakeholders, and ensures timely execution of value-based solutions. Requires a university degree, native German, and experience with OEM and Tier-1 automotive customers in Germany.

Working student to support the Sales Team, gaining practical experience in a multinational company. Must be enrolled in a German university, preferably pursuing a degree in Business Administration or a related field. Fluency in German and English required.