java English-speaking jobs in Mainz

Aircraft Mechanic (m/f/d) needed for base and line maintenance, repair, and overhaul of Bombardier and Hawker-Beechcraft business jets. Responsibilities include troubleshooting, fault rectification, and documentation of work performed. Requires completed vocational training as an aircraft mechanic or comparable qualification and Cat A license is an advantage. Must have excellent English skills, be physically fit, and possess a valid driver's license.

Internship opportunity in Global Supply Chain Business Transformation at ZEISS Vision Care. Join a team focused on sustainable solutions for ophthalmic lenses and measurement systems.

SAP Specialist needed for a leading technology and consulting company in Germany. Implement, configure, and support SAP solutions across various modules. Experience with SAP S/4HANA is preferred but not mandatory. Bachelor's or Master's degree in IT, Business, or a related field required.

Senior Consultant to advise clients on supplier performance, logistics, and production efficiency. Drive end-to-end supplier management, identify process bottlenecks, and collaborate with client teams to implement lasting change.

Notion seeks a Regional Partner Manager for DACH to own and grow the partner ecosystem across value-added resellers, cloud/hyperscaler partnerships, and local services partners. You will build and execute joint go-to-market programs, manage hyperscaler partnerships, and align partner activity with the DACH sales team's pipeline. The ideal candidate has 10+ years of experience in partnerships, channel sales, or alliances in the enterprise SaaS or cloud software industry, with a proven track record of standing up partner programs and driving revenue outcomes.

Executive Assistant to support the CEO in a hospitality-focused business. Manage calendar, travel, and communications. Act as gatekeeper and prepare briefings, meeting notes, and executive communications. Run projects and handle ad-hoc tasks.

Master's thesis in chemistry/molecular science focusing on developing ion-selective membranes for sensory applications. The project involves designing, characterizing, and analyzing membranes for electrochemical measurements and structural analysis.

The Republic of the Marshall Islands Investigations department seeks an experienced Marine Investigator to lead complex investigations of marine casualties involving Marshall Islands-registered vessels. Responsibilities include identifying root causes, developing safety recommendations, and producing reports aligned with international standards.

Lead multiple software development teams, driving development strategies focused on robust SaaS architectures and cloud technologies. Establish AI-native engineering standards, leveraging Claude Code and similar tools, to maximize productivity. Ensure processes, quality, and security standards are met, aligning with healthcare regulatory requirements.

Lead Electronics EMC Engineer responsible for EMC design, testing, and verification of automotive energy storage products. Perform regulatory and customer requirements analysis, design verification activities, and EMC testing. Manage interfaces with other departments and suppliers, presenting technical results.

Leads large-scale Agile transformations for a strategic customer in Germany. Drives program transitions from traditional to Agile delivery models and aligns processes with modern digital/embedded technologies. Manages complex programs across multiple geographies and collaborates with cross-functional teams.

Full-cycle Account Executive to grow Jira and Confluence app portfolio. Convert trials to customers, sell across multiple apps, and manage Data Center to Cloud migrations. Requires full-cycle B2B software sales experience, comfort selling multiple products, and familiarity with the Atlassian ecosystem. Professional English required, fluent German preferred for DACH region candidates.

This 12-month fixed-term contract supports HR operations for a recently acquired German business. The role involves developing, documenting, and implementing HR processes, managing payroll, and ensuring compliance with German employment law.

Analyze and assess existing Active Directory and Microsoft Entra ID environments. Evaluate hybrid identity setups and provide recommendations for on-premises, hybrid, or cloud-based solutions.

Experienced Setting Out Engineer needed for large-scale Data Centre projects in Cologne. Responsibilities include setting out, surveying, interpreting drawings, and ensuring project compliance. Requires experience with surveying equipment, construction drawings, and civil engineering. Degree in a related field preferred.

Leads the end-to-end delivery strategy for Clearwater's SaaS platform across Germany, Austria, and Switzerland. Builds and scales a team of implementation professionals, ensuring client success and driving operational excellence.

Application Specialist Tooling & Composer will configure customized medical applications using ORBIS development tools. Responsibilities include process optimization, workflow design, training, and documentation. Requires a Bachelor's or Master's degree in computer science or Healthcare IT, experience in healthcare software, and strong SQL and programming skills.

Master thesis focusing on adaptive observer design for reversible solid oxide cell systems at the Institute of Energy Technologies – Fundamentals of Electrochemistry (IET-1).

The Supply & Demand Planner EMEA ensures product availability and meets service levels by aligning regional and local demand with supply. This role uses ERP/CRM and planning systems to optimize inventory, support growth, and improve operational effectiveness. The Supply & Demand Planner EMEA will analyze data, prepare forecasts, manage inventory, and collaborate with cross-functional teams to support operational goals and customer service standards.

Leads formulation design and process development for various modalities, with a focus on ADCs, supporting regulatory submissions and technology transfer. Drives exploration and evaluation of new technologies within Formulation Technology Research Laboratories.