java English-speaking jobs in Mainz

Customer Success Manager needed for a growing EdTech SaaS business to manage mid-market and enterprise clients in the DACH region. Requires fluent German and English, plus 2+ years in a client-facing SaaS role. Focus on relationship growth, adoption, and retention.

Senior Project Manager - MEP will manage and coordinate mechanical and electrical packages for major hyperscale data centre projects. This role involves leading delivery, managing contractors, and ensuring works meet technical standards.

Workshop Service Technician responsible for Pre-Delivery Inspections, heavy repairs, and factory modifications on earthmoving equipment. Requires 3+ years of heavy equipment repair experience and expertise in diesel engines, hydraulics, and electrical systems.

Senior Legal Counsel to join a leading multinational industrial group. Draft, review, and negotiate contracts, advise on legal risks, and support cross-border projects. 8-10+ years of commercial law experience, full German legal qualification, and fluency in English and German required.

Drives end-to-end development of technical products, ensuring alignment with product strategy and business objectives. Leads cross-functional teams, gathers market and customer requirements, and manages product backlogs. Communicates product vision and priorities to stakeholders. Requires several years of experience as a Product Owner or Project Manager developing complex technical products, preferably within the renewable energy sector.

Senior Technical Consultant to design, implement, and optimize OpenText ECM solutions. Requires 3+ years of consulting experience, ECM knowledge, and skills in Java, Python, and AI technologies. Fluency in German and English is required.

Seeking a highly organized, detail-oriented Administrative Assistant for a part-time role. Responsibilities include managing shipments, coordinating invoicing, supporting accounting processes, and tracking administrative tasks. Requires German and English proficiency.

Experienced Product Manager/Owner needed to deliver a new digital HCP engagement platform within 6 months. Define MVP scope, roadmap, and backlog, driving cross-functional team collaboration to launch and achieve user adoption. Proven track record of HCP portal/engagement platform launches in pharma/healthcare required.

Define and own AI architecture standards and governance for a large, listed company's transformation. This role requires enterprise architecture experience, hands-on production AI/ML knowledge, and strong cloud skills. C1 German is a hard requirement.

Logistics Specialist to own logistics activities across partners and internal teams. Key focus includes process improvement, performance reporting, and supporting digitalization within a global consumer goods business. Requires operational logistics experience and strong communication skills.

Senior Project Manager to own major data centre projects from design through construction and handover. Responsibilities include managing scope, budget, risk, and coordinating diverse stakeholders. Requires experience in large-scale data centre construction and German regulations.

Support PROXITY's sustainability strategy across its European logistics real estate portfolio. Responsibilities include ESG reporting, decarbonization initiatives, and sustainability due diligence. Requires a relevant degree and 2-3 years of experience.

Field Operations Lead supports humanoid robot deployment and maintenance at customer sites. Responsibilities include supervising Field Operators, diagnosing technical issues, collecting operational data, and liaising between sites and company offices. Requires a relevant technical degree and 2-5 years of experience.

Define and drive the global quality strategy for Thermal Solutions. Establish unified quality frameworks, lead digital transformation, and ensure high product quality across international operations. Requires Master's degree and global quality leadership experience.

Data Scientist needed for sports performance research. Responsibilities include designing testing programs, collecting athlete data, and analyzing performance data using Python, MATLAB, and Excel. Requires experience in sports science or biomechanics.

Manages the full lifecycle of subsidiary outlets, including strategic planning, budget control, site selection, construction, and daily operations. Ensures brand consistency, operational excellence, and regulatory compliance. Oversees outlet projects, leasing processes, and asset management. Conducts inspections, audits, and drives issue resolution.

Junior Digital Modeler to bridge creative sketches and engineering reality. Build high-quality Class-A surfaces using Blender and Alias. Coordinate external vendors and support the full design iteration cycle. Requires a relevant degree and a portfolio.

Experienced Technical Project Manager needed to lead Data Center infrastructure projects across the UK and Europe. Responsibilities include end-to-end delivery, schedule management, risk tracking, and coordinating cross-functional teams. Requires 5+ years of relevant experience.

Support the team in identifying disruptive start-ups and executing venture capital activities. Tasks include deal flow origination, market research, and due diligence. Ideal candidates are enrolled students with analytical skills.

Senior Manager role in clean energy advisory. Build integrated project finance models and conduct commercial/technical due diligence for developers and investors. Requires 5+ years in clean energy valuations or transaction advisory. Fluency in German and English is required.