java English-speaking jobs in Mainz

Application Manager for MES Hydra (MPDV) needed to introduce and develop the solution across Germany, Europe, and North America. Support locations with production orders, QA, time recording, and reporting. Ensure stable operation, accompany updates, and train key users.

As a Working Student Product Design, you will translate product ideas into wireframes and prototypes, design UI solutions, and collaborate with Product Managers and Developers. You will have hands-on experience working on digital products and using Figma.

HR Organizational Enablement Manager will support M&A integration, plant network evaluations, and global HR projects. Responsibilities include organizational design, change management, data-driven insights, and talent development support. Requires a bachelor's degree, 8+ years of HR experience, and strong analytical, communication, and organizational skills.

Senior Quantity Surveyor to manage construction projects in Germany, focusing on industrial, data center, and office fit-out projects. Requires 5+ years' experience, fluency in German and English, and a degree in Quantity Surveying or related field.

Junior Operations Manager (f/m/x) for France will manage content and brochure publications for a customer portfolio, ensuring high-quality standards. The role involves regular communication with customers, collaboration with other teams, and contributing to process improvements.

Product Manager (f/m/d)* SEO/GEO will optimize the organic visibility of Engel & Völkers' website, impacting product development across 35+ countries. Drive and implement SEO strategies, develop product plans and roadmaps, and continuously assess and improve product performance in search interfaces.

Key Account Manager responsible for acquiring industrial and commercial construction projects for Korean companies in Europe. Requires a degree in Civil Engineering or Architecture, construction management experience, sales experience, native Korean, and business level English.

Test engineer (m/f/d) / test technician (m/f/d) in the field of radio. Tasks include preparing test plans, conducting radio and EMC tests, preparing test reports, and providing technical support. Requires a Bachelor's/Master's degree or state-certified technician training in electrical engineering, communications, physics, or a related field.

Senior Software Engineer with 5+ years of experience designing, developing, and maintaining scalable Java applications. Expertise in authentication protocols (SAML 2.0, OAuth 2.0, JWT), IAM, and secure, multi-tenant systems. Experience with Spring Boot, REST APIs, PostgreSQL, Redis, Docker, Kubernetes, and cloud-ready applications.

Working Student for analytical chemistry research at a fast-growing startup. Develop and implement experiments, assist with laboratory tasks, and analyze data. Must be a current student in a related field with experience in analytical chemistry.

Senior AI Efficiency Manager will identify and map processes for AI-driven automation, manage AI product portfolios, and shape the AI project pipeline. Requires experience in data-driven process analysis, AI technologies, and project management.

Lead SoSafe's strategic value-add services, operationalizing a consulting methodology focused on driving behavior change and measurable risk reduction. Develop and manage a consulting practice, translate the SoSafe Maturity Model into a "Strategic Steering" approach, and act as a subject matter expert on Human Risk Management.

Business Development Manager will prospect, qualify, and pursue potential clients. Responsibilities include defining logistics solutions, managing executive relationships, and preparing sales materials. Requires a Bachelor's degree, 5+ years of experience in supply chain/contract logistics, and fluency in German and English.

Strategic and NPI Demand Planner responsible for understanding customer demands for the V93K product portfolio. Develops and evaluates demand and supply scenarios, analyzes demand drivers, and collaborates with cross-functional teams to execute New Product manufacturing.

Drive sales and close deals for the construction, mobility, and industry sectors. Manage and grow customer platforms, focusing on high-potential customers. Promote Berner as a premium brand and reliable business consultant. Analyze and influence sales area KPIs and regularly report to superiors.

Sales Development Representative needed to build customer relationships and present energy management solutions to European SMEs. Focus on identifying decision-makers, conducting discovery calls, and scheduling product presentations. Requires 1-2 years of commercial experience, native German, advanced English, and strong communication skills. Prior energy sector experience is a plus.

Dispatch Administrator needed for fixed-term contract until June 2026. Responsibilities include receiving goods, updating the IT system, distributing materials, liaising with suppliers and ensuring accurate order fulfillment. Requires experience in a busy warehouse environment, computerised stock control systems, and strong communication skills.

Project Manager for digital transformation projects focused on data quality improvement across SAP R/3 and S/4HANA systems.

Lead the German operations of a TIC and engineering company focused on sustainable buildings. Execute a buy-and-build strategy, build a leadership team, and drive operational excellence. Proven track record in M&A, revenue growth, and operational management in a B2B services sector is required.

Aerodynamic Engineer will design and simulate advanced turbocharger components, including volutes, turbine wheels, and guide vanes. Responsibilities include running high-fidelity simulations, generating turbine maps, and developing 1D/3D simulation methods. Requires a PhD or Master's degree in Mechanical Engineering or similar with a focus on turbomachinery or aerodynamics and 3+ years of experience in automotive or related engineering fields.