java English-speaking jobs in Mainz

As a Senior Account Executive, you will drive revenue growth in the DACH region by advocating Freshworks product lines to mid-market clients. You will manage your sales pipeline, collaborate with marketing and business development, and exceed sales goals.

Develop proof-of-concepts for new power tool products and services, leveraging expertise in mechatronics, sensing, control, algorithms, actuators, and machine learning. Contribute to the next generation of Hilti's tool portfolio through collaboration with business units and academia.

Accounts Payable Accountant responsible for invoice processing, vendor master data, VAT transactions, payment runs, and monthly closing entries. Requires commercial training, financial accounting experience, and proficiency in SAP and MS Office.

Connect clients with experts as a Client Services Associate. Responsibilities include understanding client needs, sourcing and onboarding experts, and ensuring exceptional client experiences. Fluency in English and at least one of the following languages is required: German, French, or Italian.

AI Specialist to design, build, and deploy AI-powered solutions for content creation and management across multiple channels using Microsoft Azure AI services.

Full-Stack Web Developer will maintain and improve the citizenscience.eu platform using Python and Django. Responsibilities include developing features, managing infrastructure, ensuring secure deployment, and collaborating with the team.

Medical Science Liaison with Haematology experience needed for a global pharmaceutical company. Develop relationships with healthcare professionals and internal/external stakeholders. Provide clinical and scientific expertise in AML and support medical strategies.

Develop and run system simulations for data center cooling solutions. Translate simulation insights into design improvements and drive model-based development. Collaborate across teams to connect simulation specialists with data center experts.

Fitness Coach needed to deliver and implement workplace health and fitness programs, provide exercise guidance, and lead fitness classes. Must have a Trainer B license, relevant educational background, and excellent German and English communication skills.

Hardware Engineer needed for design, production, and support of industrial equipment. Requires electrical engineering degree, experience with electrical design, and proficiency in Eplan P8. Fluency in French is essential.

The Senior Data Modeler defines and governs enterprise-grade data models, translating business concepts into scalable data structures. This role designs models for cloud-native platforms, ensures interoperability, and mentors data analysts. The Senior Data Modeler collaborates with stakeholders to translate business requirements into data designs and enforces data modelling standards.

As an Amazon Fulfillment Associate, you will select, pack, and ship customer orders. Duties include receiving and putting away inventory, loading boxes into trucks, and operating powered industrial trucks. You must be able to lift up to 15kg, stand, walk, and follow directions.

This full/part-time role at TUI BLUE Sylt, Germany, starting 01.03.2026, requires a German speaker with certifications in Yoga, Functional Training, and Personal Training. You will lead group fitness sessions, wellbeing activities, and daytime sports and entertainment for guests.

Senior Manager drives ERP transformation initiatives, process improvements, and solution delivery. Develops solutions for new ERP requirements, integrations, and automations. Acts as a senior expert for ERP technology topics and collaborates with stakeholders, IT teams, and partners.

Senior Cloud Software Engineer with 7+ years experience in .NET or Golang development. Designs, implements, and supports cloud-based software solutions. Expertise in distributed systems, cloud platforms (Azure, AWS), containerization (Kubernetes), and DevOps practices. Strong communication and collaboration skills.

Develop and maintain data models and reports for commercial decision-making. Drive efficiency by automating reports, optimizing data processes, and integrating marketing and finance data. Provide ongoing reporting support and collaborate with stakeholders.

The Threat Intelligence Specialist safeguards Deutsche Börse Group's global operations against cyber threats. This role collects, analyzes, and delivers actionable intelligence to guide business decisions and reduce risk. The expert collaborates with Security Operations, Incident Response, Data Protection, and Risk Management teams.

The IT System Administrator Data Center & Cloud monitors hardware, software, and network components in the data center and cloud environment. Responsibilities include monitoring z/OS, Windows, and Linux systems, providing first-level support, and performing functions in the Security Defense Center.

Provides IT support, including system maintenance, troubleshooting, and user setup. Implements changes, ensures disaster recovery, and optimizes work processes. Requires strong problem-solving, analytical, and communication skills. Fluent English and German are essential.

Business Development Manager will focus on new business revenue growth through prospecting, qualifying, and closing deals. Responsibilities include preparing tenders, analyzing client needs, and ensuring consistent achievement of sales targets. Requires 5+ years of freight industry experience, excellent client orientation, negotiation skills, and communication skills.