freelance English-speaking jobs in Wuppertal

Software Developer will design, develop, test, and maintain a Java-based online help and technical documentation platform. Responsibilities include working with Eclipse IDE, OOP principles, and web technologies. The role also involves developing and maintaining documentation updates using Jenkins CI, GIT, and related tooling.

Build AI-native project management software from database to UI as a founding engineer. Own end-to-end product development with full technical ownership and direct access to founders. Design systems for complex workflows and large data volumes, focusing on performance, maintainability, and developer experience.

Area Managers lead teams and create operational plans to meet targets. Responsibilities include driving safety, quality, and productivity, analyzing performance, and implementing process improvements.

Sales Development Representative will reach out to small businesses, introduce SumUp's POS and payment solutions, qualify merchants, and schedule appointments for the Field Sales team.

HR & Administration Specialist to support HR operations and office administration. Responsibilities include full employee lifecycle support, contract management, recruitment assistance, and office coordination. Requires fluency in German and English, 1-3 years of relevant experience, and strong organizational skills.

As an Industry Principal for S/4HANA data migration projects, you will own and drive the end-to-end data migration workstream across global SAP Transformation & Rollout programs. You will define the migration strategy, governance framework, execution roadmap, quality controls and cutover readiness approach required to move business-critical data from legacy platforms into SAP S/4HANA. You will lead global and regional data migration teams, coordinate with business data owners, process leads, functional consultants, technical teams, PMO and client leadership.

As a Sales Associate, you will provide exceptional customer service, share product knowledge, and support store operations. Previous retail experience is an advantage but not required.

Support the testing team in software development for electric drives, focusing on CI pipelines and tools. Tasks include further development of Gitlab and Python, cloud infrastructure commissioning, data evaluation, and AI agent implementation.

Leads the global digital experience for Sonova's B2B customers, including hearing care professionals worldwide. Defines and owns the B2B digital strategy, including web, customer portals, e-commerce, and AI-enabled experiences. Drives commercial growth through digital initiatives and builds AI-powered customer experiences.

The Sales Planning and Performance Specialist provides systems and administrative support to the Sales Planning and Performance team. This role extracts and manipulates data for sales performance analyses, reporting, and incentive calculations. The Specialist also supports sales planning processes, coordinates payment calculations, and provides general user support.

Online seit 2026-07-14 PhD Student (f-m-d) for Multi-scale Modeling of Biomolecular Phase Transitions Application until2026-08-13 Start of work1 October 2026 Scope of work39 h The newly established research group in Phase Transition Engineering (Group Leader: Dr.

Conduct research on developing early-warning systems for groundwater contamination in karst regions. Focus on transport processes governing fecal bacteria and microbial contamination in karst aquifer systems. Apply in-situ flow cytometry and hydrochemical analysis.

Working Student Product Designer will collaborate with cross-functional teams to define problems, conduct research, and create high-fidelity design solutions for Virtual Assembly Line tools. Responsibilities include understanding complex models, designing user-centric solutions, and facilitating user research.

Sales Development Representative will identify and engage B2B customers through outbound prospecting. Generate qualified sales opportunities and schedule meetings for the Account Executive team. Build and manage a pipeline of Mid-Market and Enterprise prospects.

Manages procurement and supplier markets, working with stakeholders to clarify requirements and negotiate contracts. Evaluates supplier performance and drives continuous improvement. Requires a degree in a commercial/business or technical field and experience in complex procurement activities.

German-speaking Customer Support Representative needed for a hybrid role in Munich. Provide dedicated client support, manage relationships, and collaborate with Sales, Operations, and Compliance. Must have C2 German and C1 English fluency, 1+ year of client service experience, and strong MS Office skills.

This 6-month internship provides hands-on experience in online journalism. Tasks include writing, editing, and publishing articles, conducting research and interviews, and supporting editorial efforts. The role involves analyzing metrics, SEO/GEO optimization, and project support.

Nachhilfeunterricht seeks motivated tutors to provide personalized online or in-person lessons to students of all ages across various subjects.

Develop, optimize, and qualify wet-chemical and dry-cleaning processes for semiconductor components. Ensure molecular and particulate cleanliness for components used in high-end electron microscopes. Perform surface analysis using techniques like RGA, XPS, AFM, GCMS, FTIR, SEM/EDX, particle counting, and inspection. Lead contamination root-cause analyses and corrective actions. Conduct supplier qualification and audits to ensure compliance across the supply chain.

Experienced Training Manager to design and deliver operational training programs, build onboarding frameworks, and support workforce development initiatives in logistics operations.