java English-speaking jobs in Mainz

Develop a prototype Industrial Virtual Switch (IvS) for virtual PLC deployments. Implement support for industrial automation and safety protocols. Benchmark against state-of-the-art cloud switches and optimize performance.

Develop and maintain software solutions for efficient manufacturing processes. Collaborate with manufacturing engineers to translate requirements into robust software. Analyze and resolve software issues impacting production.

Develop and implement frontend and mobile features for digital health research solutions. Experience with React Native, Android, and iOS app development required. Collaborate with UX Design, Backend Engineering, QA, and Product Management.

As a Sales Agent, you will be the first point of contact for patients, providing first-class advice and guiding them through the entire treatment process. You will build trust with patients, handle inquiries, and manage bookings. Fluency in German and English is required, along with professional experience in sales and customer service.

Develop and integrate technical systems for live and VR productions. Design, test, and implement hardware-software setups ensuring stable, high-performance workflows. Plan and integrate production systems (video, audio, network, VR).

Provide strategic consulting support to European Management, drive business transformation projects, and act as a trusted advisor. Lead complex projects, analyze market trends, and develop actionable recommendations for senior leadership.

Define project-specific requirements baselines, manage change control, and ensure traceability from stakeholder needs to test cases.

Pina Earth is a climate tech startup seeking motivated individuals to contribute to their mission of forest transformation and climate protection. The company develops software to assess forest carbon stock and enable forest owners to access carbon markets.

Design and develop an operational data service for regional teams. Build Power BI dashboards and reports, collaborate with developers, and support ad-hoc analysis.

System & Software Engineer for Helicopter Simulation supports helicopter and system testing through simulations (civil and military). Responsibilities include validation of new concepts, development and integration of simulation systems, and technical advancement of subsystem simulations.

Manage and maintain the reporting ecosystem for marketing channels and their spend. Optimize marketing cost, budget, and performance reporting processes. Control and audit marketing spend to identify insights, inefficiencies, and opportunities.

Field Technician responsible for monitoring, analyzing, and investigating powertrain component issues. Collaborates with R&D, factories, and suppliers to develop countermeasures. Requires a technical degree, experience in a similar role, and strong diagnostic expertise in ICE and (P)HEV systems.

Aircraft Mechanics support line managers by performing aircraft maintenance tasks, troubleshooting systems, and ensuring compliance with airworthiness regulations.

Lead Solution Architect will establish Architecture Governance for products, shape software architecture, and introduce engineering practices to enable faster, safer, and more reliable software delivery. This role involves defining architecture principles, standards, and guardrails, guiding target architectures, and establishing shared engineering practices. The Lead Solution Architect will also embed security and compliance considerations into architecture and delivery standards.

Senior Marketing Decision Analyst will partner with Marketing & Product Managers to drive marketing decision intelligence across 7NXT's multi-brand portfolio. This role focuses on understanding user behavior, experiment design, and marketing effectiveness with a focus on causal measurement, incrementality, and subscription-building insights. Responsibilities include translating data into actionable language, helping prioritize investments, and measuring the true incremental impact of marketing campaigns.

Provides expert engineering support for NATO's Deployable CIS systems (DCIS). Duties include design, test, implementation, and support of IT baselines, troubleshooting, and exploring new technologies in areas such as infrastructure, platform, authentication, web hosting, cyber hygiene, and remote desktop solutions.

Manager for global digital healthcare solutions commercialization, focusing on nursing care. Drive market launches, support customer implementations, and ensure value delivery. Collaborate with sales, marketing, and digital teams.

Postdoctoral researcher to conceptualize and implement a spatial reconstruction framework using generative AI for meteorology and hydrology. Develop and benchmark AI methods and integrate heterogeneous data sources. PhD in AI or Machine Learning required, with expertise in deep neural networks and large datasets.

Experienced Tech Lead will own the technical core of a globally used AI platform. Develop production-level code, lead a small senior AI team, and design the architecture for training, inference, and deployment of language models. Improve context handling, memory mechanisms, and response quality. Define and drive fine-tuning and post-training strategies. Build moderation and classification solutions for adult/NSFW content.

As a Senior Product Analyst, you will drive data-informed decisions by performing analyses, defining KPIs, and building dashboards. You will partner with product and engineering teams to shape data foundations, empower teams through data literacy, and contribute to product development.