java English-speaking jobs in Mainz

Senior Software Engineer will develop production-ready software for sophisticated, distributed systems powering modern railway passenger information solutions. Responsibilities include designing software architecture, building secure software, and collaborating with system engineering experts.

Senior Infrastructure Engineer will design, build, and operate the cloud infrastructure for praxipal's AI-powered healthcare platform. Responsibilities include owning and evolving cloud infrastructure on AWS and GCP, building CI/CD pipelines, and managing security and SecOps topics. Must have strong hands-on programming experience in Rust, TypeScript, and/or Python, and proven experience owning production infrastructure in AWS and/or GCP. Fluent German is required.

Solution Architect for clinical software solutions combines technical expertise with understanding of clinical and administrative processes. Develops customer-specific solution concepts, analyzes requirements, and collaborates with engineering, product, and project management. Requires a computer science degree, strong understanding of APIs, interfaces, and system architecture, and knowledge of IT and infrastructure concepts. German fluency is required.

Own partner onboarding and go-live processes, driving measurable outcomes and building scalable workflows. Collaborate cross-functionally to improve partner experience and address operational bottlenecks.

The Max Planck Institute for Political and Social Science seeks a Postdoctoral Fellow in Political Science to conduct research on the relationship between political institutions and conflict. The successful candidate will write academic articles, conduct fieldwork, and contribute to the department's research environment.

Lead and scale the Battery Control System (BCS) Product Team, developing reliable, high-performance systems for energy storage. Guide a cross-functional team of firmware, hardware, and testing experts. Foster a culture of clear ownership, pragmatic execution, and strong technical standards.

Manage and coordinate the Service Desk team, ensuring smooth IT operations. Develop and implement IT strategies to improve services. Collaborate with departments to optimize IT services and user satisfaction. Handle user issues and escalations, ensuring high service quality.

Plan A seeks a Customer Success Manager to act as the point of contact for large global companies in EMEA. The role involves managing client relationships, providing expert guidance on sustainability and carbon accounting, and collaborating with internal teams to ensure customer success.

Software Architect responsible for solution and integration architecture, technology selection, and support of development teams. Designs architecture roadmap, develops documentation, and leads software development projects. Requires deep knowledge of software development practices, web and cloud technologies, and microservice architecture.

The W2 Professorship for AI Infrastructure (f/m/d) at THWS seeks a committed individual with experience in AI infrastructure to establish a nationally and internationally visible research group. Responsibilities include research and teaching in areas such as distributed systems, cloud-native infrastructure, AI operationalization, data management, and hardware implementations. The successful candidate will also be expected to acquire third-party funds, manage research projects, and supervise junior researchers. Teaching experience in AI and fluency in English are required.

Provides administrative, logistical, and operational support to the Parent Volunteers Association. Supports program and event logistics, Dragon's Café operations, and PV communications. Requires strong organizational skills, fluency in English and sufficient German, and proficiency in Microsoft Office and Google tools.

The German Federal Pension Insurance is seeking IT Security Consultants to support and advise on the operational implementation of IT security requirements. Responsibilities include contributing to the creation and development of IT security concepts, managing technical support for acceptance testing, and advising business departments on IT security requirements.

The Leibniz Institute for Natural Product Research and Infection Biology seeks a Scientific Communication, Public Relations, and Events Officer to prepare and communicate research results and activities, particularly for the INCATE project. Responsibilities include writing accessible texts, supporting public relations activities, organizing events, and developing communication materials. The ideal candidate has a degree in media, communication, journalism, or public relations, or a natural science degree with proven science communication skills. Fluency in German and English is required.

Leads the definition and execution of a technology vision and architecture strategy for Vision Care workflow platforms. Oversees end-to-end platform delivery, including architecture, design, implementation, deployment, and operations. Manages a team of engineers and fosters a culture of accountability and continuous learning.

ATIA Ltd seeks reseller companies to find clients needing IT systems, web applications, or ISO standard services. Partnerships offer 20-30% of project value or a markup on a base price.

Architect end-to-end digital ecosystems connecting frontends, backends, and AI systems. Collaborate with stakeholders to define system architecture, ensuring scalability, reliability, and maintainability. Design integration interfaces and pipelines for GenAI models, visual AI tools, and enterprise systems. Guide teams through security, observability, and deployment best practices.

The GFZ is seeking a senior scientist to lead its Secondary Ion Mass Spectrometry (SIMS) user facility. Responsibilities include managing laboratory operations, advising scientists on SIMS applications, developing research strategies, and reporting on laboratory utilization. The successful candidate will have a PhD in the natural sciences, at least 5 years of experience with SIMS instruments, and expertise in mineralogy, crystallography, and sample preparation.

Lead the growth of qualloy's European buyer marketplace by acquiring new powder customers and building long-term business relationships. Develop sales strategies, analyze market opportunities, and represent qualloy at industry events.

Senior Protection & Secondary Design Engineer specializing in Medium Voltage (MV) systems. Designs protection schemes, develops secondary schematics, selects relays, and configures, tests, and commissions protection systems. Requires 7-10+ years of experience in protection engineering and secondary system design (MV level).

Research Assistant/Doctoral Student will work on research questions related to digitalization, sustainability, performance management, and CFO roles in corporate transformation. The position requires a strong interest in these areas, analytical skills, perseverance, a master's degree, and excellent English.