java English-speaking jobs in Mainz

Working student supports organization and coordination of meetings, booking rooms, preparing materials, and providing administrative assistance. Must be enrolled in a university program and proficient in MS Office applications.

Provides administrative and logistical support to the MTRI team. Responsibilities include organizing marketing activities, managing office supplies, handling correspondence, and providing event planning support. Requires advanced MS Office skills, fluency in English and German, and strong organizational and communication skills.

Internship supporting Assembly, Integration and Test (AIT) for optical instruments. Tasks include supporting integration/assembly activities, writing test procedures, and working in cleanroom conditions. Requires fluency in English and German, and enrollment in an aerospace or mechanical engineering program.

Define clinical and technical requirements for online eye testing and centration. Drive product development and user validation. Serve as interface between optometry experts, engineers, and business units.

Leads the Air & Ocean business in Germany, driving growth, profitability, and customer satisfaction. Manages P&L, develops strategic customer relationships, and oversees operational excellence. Requires extensive leadership experience in freight forwarding, proven business growth track record, and strong commercial acumen.

Shape the growth of a leading Snacks portfolio, focusing on Doritos and one Snacks brand. Own brand strategy and execution, translate insights into impactful plans, and deliver strong AOP results.

Intern to support the Private Equity Investments Team in Munich throughout the investment process (due diligence to investment decision) starting October 2026.

Support the Voith Group Turbo Division in tracking customer complaints and ensuring timely processing. Develop global guidelines for handling customer portals and integrate data capture forms into customer contracts. Assist in improving goodwill policies and managing damaged parts inventory.

PhD candidate in physics to design and realize a STED microscope for materials science applications. Will develop acquisition protocols, analyze data, and collaborate with project partners.

Lead global AI transformation initiatives, designing and delivering change management activities across departments and regions. Collaborate with business leaders, IT, innovation, and end-users to drive integrated change.

Develop technical solutions in small teams, ensuring projects are industrialized on time and within budget. Design, document, and implement fixtures, tools, and gauges. Coordinate with various teams for optimal equipment design and functionality.

Represents the Deutschland office to existing and potential customers, acquiring new business and managing contracts. Requires fluency in English and Japanese, strong communication and organizational skills, and willingness to travel.

We are seeking an administrative and organizational assistant for the sales department and other departments. The role involves handling diverse administrative tasks, cross-departmental assignments, document management, correspondence, travel arrangements, and event organization.

Senior Technical Product Owner for cloud and microservice-based applications. Develops product strategies, guides developers, and collaborates with stakeholders. Requires a degree in a relevant field, prior Product Owner experience, and strong analytical and communication skills.

Enterprise Application Consultant will work with clients to define business requirements, create process flows, and implement technology solutions.

As a KYC Analyst within RBC Capital Markets operations, you will ensure Know Your Client (KYC) Due Diligence processes are conducted accurately to maintain trading relationships. This role requires fluency in English, French, and German. You will work with the business to ensure KYC compliance with global and regional regulatory requirements and act as a subject matter expert on regional KYC/AML regulatory requirements and RBC Capital Markets policies. Proven KYC/AML Capital Markets experience with a financial institution and a BA/BS or equivalent are required.

Avionics Systems Engineer (m/w/d) needed for aircraft level design, development, and integration of navigation systems (ATA 34, 46). Requires Masters Degree or Diplomingenieur in Aerospace, 5+ years experience, and familiarity with EASA Part 21J and CS-25/FAR 25.

Installation Technician will install cabling and racks in data centers. Responsibilities include adhering to safety practices, testing cabling, and managing inventory. Must be able to work at heights, lift equipment, and travel within the work area. High school diploma or equivalent required.

Operates, monitors, and supports physical data center facilities conditions. Inspects, maintains, and repairs various data center systems including electrical distribution, UPS, generators, and control and monitoring systems. Provides daily assistance to technicians and supports startup, commissioning, and integration of new electrical equipment.

Lead the end-to-end promotional engine for a European pet e-commerce company. Develop promotional strategy, governance, and measurement, ensuring alignment with cross-functional teams. Build a Promotions Center of Excellence and drive integrated net price management.