java English-speaking jobs in Wiesbaden

Senior Principal Software Engineer will lead Zalando's migration to React Native, solving complex engineering challenges and ensuring a scalable, secure transition. You will champion a performance-first culture, mentor engineers, and architect core app features with performance as a primary consideration. Extensive experience developing large-scale React Native applications and deep architectural fluency in the new React Native architecture are required.

PhD position at the Institute for Molecular Pathogenesis, Heinrich Heine University Düsseldorf. Research focus: host-pathogen interactions, specifically how a host defense factor breaks down bacterial outer membranes. Requires M.Sc. in a relevant field, research experience in molecular biology, cell biology, and biophysics, and fluency in English.

The Exzellenzcluster SCALE seeks an individual to coordinate office and financial administration. Duties include office management, personnel and financial administration, budget management, and administrative support.

Lead a product pillar strategy for a critical product area, driving deep multi-product penetration across customer employee bases. Build and coach a product team to deliver unified, AI-enhanced, and scalable experiences.

Leads, mentors, and develops a cross-functional engineering and technology team. Defines and evolves the technology roadmap for scalable, high-performance XR products. Evaluates, selects, and implements new tools, platforms, and technologies. Ensures high standards across software quality, security, reliability, and delivery. Partners with senior leadership to align technology with business strategy. Manages technology budgets, resource planning, and delivery timelines. Builds external technology partnerships and stays ahead of emerging market and technology trends.

Account Executive to manage high-value Swiss/DACH accounts and drive new business opportunities. This role transitions from account management to dedicated sales in November 2026. Requires native German, fluency in English, and experience in B2B SaaS sales, ideally within the hospitality, leisure, or attractions industry.

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.

This fixed-term maternity cover position supports national growth by assisting in the acquisition and management of bus partners. Responsibilities include handling licensing, permitting, and timetable administration, preparing contracts and legal documentation, and collaborating across departments.

Lead and mentor a team of test engineers, ensuring product quality, test strategy, and process compliance for software and systems testing in the electric vehicle and energy storage sectors.

Software Architect to design and enhance machine-level application software for a high-throughput platform. Collaborate in an agile team to define requirements, guide architectural decisions, and participate in implementation, testing, and integration.

Project Support Employee needed to assist in the coordination and execution of project activities. Support cross-functional teams, ensure communication with Greek-speaking stakeholders, and contribute to project goal achievement. Native Greek and strong German language skills required. Experience with ERP systems and MS Office is beneficial.

Lead DevOps Engineer to design, own, and scale the multi-cloud backbone of IQA, an AI-powered SaaS solution. Define and execute the multi-cloud infrastructure roadmap, own the technical strategy for Kubernetes-based deployment infrastructure, and build, deploy, and monitor deployments across various cloud providers and on-premise setups. Engineer DevOps tooling and automation layers, own the infrastructure strategy including data, CI/CD, and orchestration, and develop and optimize APIs and data processing systems using Python. Collaborate with product and engineering leadership to translate business requirements into robust infrastructure capabilities.

Implementation/Client Onboarding Specialist to manage end-to-end implementation projects for veterinary customers in Germany, Austria, and Switzerland. Deliver remote and onsite training, configure software, and build relationships with stakeholders. Fluency in German and English required.

Leads marketing strategy and activation for OTC brands (nicorette, Imodium, Dolormin, Olynth) in Germany. Partners with media, trade marketing, sales, and supply chain teams. Requires a university degree in business/economics with a focus on marketing and 4+ years of brand management experience.

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.

Data Analyst for Finance to develop and maintain financial models, analyze business performance, and prepare reports. Requires a degree in Finance, Economics, or Business Administration and 3+ years of experience in financial modeling and data analysis. Proficiency in Power BI is required.

This position manages and administers utilities supply and service contracts and agreements. Responsibilities include voucher certifying, utilities procurement control, and ensuring compliance with relevant regulations. Applicants must possess a German driver's license class B, office automation skills, and fluency in English (C1) and German (C2).

Ensure the reliable operation of Linux and infrastructure platforms for a large e-commerce store. Collaborate with development and DevOps teams to maintain a scalable and high-performing environment. Responsibilities include server administration, configuration management, virtualization, monitoring, and database management.

Manages standard and moderately complex payroll implementations, ensuring projects are delivered on time and to a high standard. Prepares project documentation, identifies risks, and collaborates with cross-functional teams. Supports seamless handovers to Payroll Support and mentors less experienced team members.

Research Assistant position supporting a Ph.D. in knowledge-enhanced large language models. Responsibilities include designing, developing, and implementing algorithms and models, creating and optimizing prompts and contexts, and conducting experiments to evaluate language models.