freelance English-speaking jobs in Wuppertal

Senior Auditor (m/f/d) supports the Internal Audit unit in enhancing and protecting organizational value. Conducts risk-based audits at group companies globally, analyzes business processes, identifies risks, and develops audit programs. Documents work steps, prepares audit results, and communicates findings to senior management.

Master's thesis focusing on process analysis and optimization in elastomer injection molding. Analyze existing processes, characterize elastomer materials, and conduct experimental series to identify process improvements.

This working student position supports the asset management team within the nuclear industry. Responsibilities include administrative tasks, market research, and content creation. The ideal candidate is a student with strong organizational skills and an interest in the utilities industry.

Financial Controller Data & BI (German Speaking) will build and optimize financial data models using Excel, Power Query, and Power BI. The role involves contributing to financial statement preparation, supporting cash flow forecasting, and performing analytical reviews of financial performance. Requires a Master's degree in Finance and 3-7 years of relevant experience in FP&A, financial controlling, audit, or transaction services. Fluency in German and English is required.

Provide high-quality travel assistance via chat, phone, and email. Process bookings and educate customers on the Navan platform. Must be fluent in German and English, have GDS experience, and be metrics-driven.

PLC Development and Support Engineer needed for design, testing, and maintenance of PLC systems. Experience with Beckhoff TwinCAT3, TwinSAFE, and industrial communication protocols required.

Designs, implements, and monitors occupational health and safety policies across sites, ensuring regulatory compliance. Conducts risk assessments, safety audits, and incident investigations. Provides safety training and tracks safety KPIs. Requires knowledge of German and EU occupational safety regulations and standards, including DGUV, Brandschutz, and Arbeitsschutz frameworks.

Senior Engineer Analysis (m/f/d) required for aircraft development. Expertise in stress, fatigue & damage tolerance for metal and composite components. 10+ years experience in structural analysis throughout aircraft development phases and lifecycle. Lead and instruct complex tasks, define analysis specifications and methods, and prepare certification documents.

Technical Sales / Business Development Manager to drive growth in the German Automotive market. Develop new business opportunities with OEMs and Tier 1 suppliers, build relationships, and lead projects from development to production. Bachelor's degree in engineering (Mechanical, Chemical, or Materials Science) and 8+ years of experience in Automotive (Sales, BD, or Application Development) required.

Senior Fullstack Engineer to build and extend an AI-powered security review platform. Responsibilities include backend development, data flow design, consultant-facing UI development, and platform reliability. Requires 5+ years of fullstack experience, Python/FastAPI, PostgreSQL, async programming, React/TypeScript, and production deployment experience.

Research Assistant (m/f/d) for a fixed-term, part-time position (67% of full-time) at the Institute of Chemistry - Computational Chemistry of Nanomaterials. The position is for 36 months and focuses on electronic structure calculations for material design within the DFG project DISCOFOX.

The ifo Institute seeks a Postdoctoral Researcher / Economist to join the Center for Migration and Development Economics. The successful candidate will conduct research on the economics of migration and integration, contribute to policy-relevant solutions, and guide doctoral candidates. Applicants must have a PhD in economics or a related field and proven research experience in internationally recognized journals.

Drive DACH growth for a leading ticketing platform. Identify, approach, and close new event organizer and ticketing partnerships across Germany, Austria, and Switzerland. Own the full sales cycle and represent TicketSwap at industry events.

As an Associate Account Manager, you will manage relationships with brands, develop growth strategies, and drive operational excellence in the EU fresh and perishable grocery sector. You will analyze data, recommend improvements, and collaborate with stakeholders to optimize brand performance on Amazon.

Experienced Operations Director to lead manufacturing across 2 sites in North Rhine-Westphalia. Full accountability for production performance, operational excellence, and strategic development of processes, technologies, and teams. Reports to Plant Manager/Managing Director and leads 5-6 managers across 600+ personnel.

Provides advanced technical support for NATO CIS Services and architecture and IT/Data Management Services. Supports fault diagnosis, maintenance, and documentation. Collaborates with stakeholders to ensure service continuity and performance.

Account Manager responsible for selling IVD products and systems in northern Germany. Develops regional sales strategies, builds customer relationships, and proposes solutions to meet customer needs. Requires a scientific degree, 3-5 years of sales experience in immunochemistry/diagnostics, and fluency in German and English.

The NATO Integrated Mission Services Centre (NIMSC) seeks industry support to deliver technical, operational, engineering, and service-governance activities for the NATO Security Assistance and Training for Ukraine (NSATU). The Contractor will provide Routing and Switching Level 3 service technical support, infrastructure maintenance, system documentation management, Engineering service reporting, and participation in on-call and operational coordination activities.

Ensure data consistency, automation, and reliability across performance tracking. Develop and maintain Power BI dashboards and reporting solutions. Track, analyze, and communicate Route-to-Market KPIs. Provide analytical support for Route-to-Market optimization.

MarketFully Group seeks a native Norwegian speaker with SEO experience to optimize Google Business Profiles for a globally recognized sportswear brand.