java English-speaking jobs in Mainz

Product Manager to lead discovery, development, and execution of strategic features and process automation for a B2B2C Private Markets platform. Define product roadmap, design user experiences, and analyze product metrics.

Teamlead SAP Consultant FICO Finance & Controlling (w/m/x) needed for national and international SAP S/4HANA Finance projects. Requires 8+ years of consulting experience, including technical and disciplinary team leadership, and expertise in SAP S/4HANA finance and accounting systems. Strong communication and negotiation skills in German (C1) and English are essential.

Operational Buyer to manage purchasing activities, ensure timely procurement of materials, and support supplier performance.

Lead IT service delivery and helpdesk operations across the DACH region, ensuring high-quality support and user satisfaction. Monitor, analyze, and report on KPIs and SLAs; manage escalations and drive continuous service improvement. Act as primary IT liaison for regional stakeholders and coordinate with global teams and vendors.

The IT Co‑operation Implementation Support team delivers IT co‑operation initiatives aligned with the European Patent Organisation's strategic objectives. Responsibilities include leading the preparation and implementation of IT solutions at national offices, analyzing and adapting solutions to meet local requirements, and providing technical expertise throughout the solution life cycle.

Develops and steers future industrial system architecture, defines end-to-end PDP processes, and leads delivery of fuselage industrial requirements. Specifies Digital Twin content and develops enabling processes, methods, and tools. Formalizes V&V plans and defines methodologies to ensure production rate achievement. Trains the architect community and creates required documentation.

Experienced Project Planner needed for a major industrial construction project in Frankfurt. Develop and maintain Primavera P6 schedules, manage integrated project programmes, and track progress against baseline schedule. Strong Primavera P6 experience and construction scheduling expertise required.

Oversee planning, organizing, and executing global events for MISSION 2044, a leader in defense, national security, space, and critical technologies. Collaborate with stakeholders, manage logistics, and ensure seamless event execution.

JD.com seeks a Food Customs Clearance Specialist to manage import and export declarations, handle customs documents, coordinate logistics, and liaise with customs authorities. The role involves research on customs policies and regulations, managing service providers, and ensuring compliance with customs laws.

Supports deal execution in M&A mandates for sustainability-driven sectors. Conducts financial analysis, market research, and due diligence. Requires 1-3 years of relevant experience and fluency in German and English.

Lead a team of security engineers and incident responders. Provide security advice, manage vulnerabilities, and handle security incidents. Draft security policies and processes.

Office Manager for a European defense tech start-up specializing in electronic warfare and precision localization. Manage daily office operations, coordinate internal processes, and support management and teams with scheduling, travel, and meeting preparation.

Execute end-to-end go-to-market strategies across customer segments and channels. Build and optimize the GTM flywheel, including outbound, inbound, ABM, LinkedIn content, paid acquisition, and sales workflows.

Mechanical Project Manager will lead all mechanical works on a large-scale data center project from pre-construction through commissioning. Responsibilities include managing subcontractors, driving quality and safety standards, and collaborating with client, design, and commercial teams.

Project Manager (Field Engineer) will oversee the on-site deployment of engineering and automation solutions across Germany. Responsibilities include project planning, execution, and closure, ensuring projects are delivered safely, on time, and to high standards.

Experienced Project Manager needed to lead cross-functional EPC teams for large-scale Battery Energy Storage and STATCOM projects. Fluent in German and English, you will manage project scope, budget, and delivery while ensuring compliance and client satisfaction.

Senior Supply Chain Analyst will work directly with clients to identify optimization and simulation solutions to improve performance. Responsibilities include analyzing model structure, inputs, outputs, and results, validating data structures, and collaborating with a team to deliver results. Requires proven experience creating solutions, developing supply chain models, and translating analytical outputs into actionable insights.

HR Generalist for a growing company of up to 50 employees. Full-cycle HR administration, recruitment, employee support, and HR reporting. Experience in HR, active recruitment, and knowledge of labor law required.

SAP Consultant needed to optimize and enhance SAP system landscape across SD, CS, LE, MM, PS, and Foreign Trade/Customs modules. Will work with business departments, manage the full change lifecycle, and define SAP interfaces to external systems. Requires several years of experience designing, customizing, and implementing SAP processes, background in IT application development, and experience with interface formats (IDoc, XML). ABAP skills needed for analysis, troubleshooting, and extending functionalities.

Talent Advisor needed for full-time, permanent position with Randstad Sourceright. Coordinate recruitment processes for interns and early careers candidates, manage processes, and collaborate with various stakeholders. Experience in recruitment, process management, and strong communication skills required.