freelance English-speaking jobs in Wuppertal

System Engineer (m/f/d) for aerospace & defense projects. Responsibilities include capturing customer requirements, refining equipment needs, and coordinating with software development. Requires a degree in computer science, systems engineering, aerospace engineering, or a related field and experience in systems engineering.

The Global Account Representative (GAR) drives sales growth at strategic Semiconductor accounts in Europe. This role reports to the Global Account Manager and involves developing sales strategies, managing opportunities, and providing customer service. The ideal candidate has a science or engineering degree, 5+ years of sales experience, and fluency in German and English.

Designs BCU-based substation control systems for high voltage direct current (HVDC) systems. Implements control software and verifies it using simulation tools and real-time test environments. Prepares design specifications, documentation, and effort estimations. Clarifies technical requirements within project teams, with customers, and suppliers. Provides remote support during commissioning and service of HVDC systems.

Leads and manages commissioning and testing activities for photovoltaic (PV) projects, including grid connection and Battery Energy Storage Systems (BESS). Plans, coordinates, and documents the commissioning process, collaborating with subcontractors and stakeholders. Acts as the Responsible Electrical Person, ensuring electrical safety and compliance with standards.

Develop and refine corporate and business strategies for the Chinese market. Plan, manage, and execute strategic initiatives to support corporate objectives. Lead the annual strategic planning process for the China region.

Supply Chain Manager to lead production planning, scheduling, and logistics for a growing manufacturing operation. Manage a team of 20, oversee 10,000-12,000 parts, and drive process improvements. Requires a degree in Mechanical/Industrial Engineering, 3-5 years' experience in production planning, strong SAP skills, and fluency in German and English.

Strategic Account Executive to drive new business within Germany's largest savings bank and a major European insurance group. Focus on building relationships, identifying opportunities, and delivering business outcomes. Requires proven track record in complex enterprise sales, Banking/FSI domain expertise, and technical sales experience.

Communicate product value to customers, deliver presentations, and support Proof of Concept processes. Provide technical training and resolve customer inquiries. Build relationships with clients and partners.

Aircraft Technician (B1/B2) performs aeronautical maintenance activities, provides technical instructions, and certifies completed work. Requires AML according to EASA Part-66, experience in civil aviation maintenance, and fluency in technical English.

Customer Support Specialist will manage customer orders from entry to delivery, handle worldwide shipping, and communicate with various internal and external stakeholders.

Lead the electrochemical strategy for a European energy storage company developing a non-lithium battery technology. Define the roadmap for redox chemistry, electrolytes, interfaces, and degradation modeling. Bridge deep science with real-world systems, ensuring innovation translates into manufacturable products.

Sales Development Representative needed for a fast-growing B2B SaaS company. Focus on outbound sales, cold calling, and generating qualified meetings. Must have German (C2) and English (B2+) fluency. Previous sales experience is a plus.

Drive market growth for IFS Loops, an agentic AI platform, by selling autonomous, AI-driven workflows to industrial enterprises. Lead consultative sales conversations, position IFS Loops as a transformative solution, and close 6-7 digit ACV opportunities. Proven sales hunter with experience selling complex enterprise software and AI solutions is required.

Leads affiliate-wide Customer Excellence agenda, partnering with General Manager and Affiliate Management Team to drive commercial performance, customer experience, and operational effectiveness. Focuses on business planning, transformation, customer excellence, and digital enablement. Requires leadership experience in customer excellence, business transformation, sales, marketing, or senior commercial leadership roles. Strong analytical skills, knowledge of CRM, SFE, AI, and analytics platforms are essential. Fluency in English; German preferred.

Product Manager - Lignin Materials will own and steer the product portfolio, define specifications, and develop product strategies. The role requires experience in product management, sales, or application management in specialty chemicals or materials, with a strong commercial focus and knowledge of biomaterials, especially lignins.

Business Development Manager will drive profitable growth for Microsoft Embedded/IoT by acquiring new customers and managing existing ones. The role involves building relationships with partners and vendors, identifying sales opportunities, and providing sales training. Requires experience in IT channel sales, strong communication skills, and fluency in English and German.

Electrical Engineer to ensure reliable and safe operation of site electrical infrastructure and power distribution systems. Will also act as the site's primary expert for the Energy Management System (EnMS) in accordance with DIN EN ISO 50001.

Medical Scientific Liaison for Rare Diseases / Liver will build relationships with medical and scientific experts, provide scientific education, and support clinical development. Requires an advanced scientific degree, previous MSL experience, and expertise in Rare Diseases / Liver. Fluency in German and English is required.

Install, remove, maintain, and repair engines and components. Perform functional tests, troubleshoot, and repair defective parts. Document work and ensure compliance with regulations.

Provide first-level customer support to Finnish-speaking customers via phone, email, and chat. Process orders, manage customer accounts, and handle returns, exchanges, and repairs.