freelance English-speaking jobs in Wuppertal

System and software test engineer to join a team focusing on silicon photonics testing. Responsibilities include designing, implementing, debugging, and executing tests for silicon photonics test equipment. Collaborate with development teams in Germany, China, and Japan. Bachelor's or Master's degree in Electrical Engineering, Computer Science, or a related field required. Experience in software and system testing, especially test automation and exploratory testing, is necessary. Good understanding of digital electronics and optical communication, Java programming language, and Linux operating system are also required.

Lead the European organization, driving business performance and sustainable growth across nine countries. Translate global strategies into regional actions and share P&L responsibility for the region.

Drives strategic sales into enterprise accounts, prospecting, qualifying, selling, and closing new business. Focus on new business development with a split of 70% new logo business and 30% account development. Manages the sales process, including lead generation, qualification, evaluation, close, and account care. Requires 7+ years of quota-carrying sales experience in software products and services.

Leads affiliate-wide Customer Excellence agenda, shaping commercial performance, customer experience, and operational effectiveness. Partners with General Manager and Affiliate Management Team to drive business planning, performance management, and transformation across Commercial, Medical, Market Access, and Business Technology Services. Focuses on commercial performance, data-driven insights, digital enablement, and building a high-performing Customer Excellence team.

Internship in Antibody Development focuses on cloning, expressing, and analyzing antibodies. Successful candidates will have a master's degree in biology, immunology, biotechnology, or a related field and knowledge of molecular biological techniques.

International Payroll Specialist needed for fixed-term contract (July 2026 - December 2027). Process, audit, and reconcile international payrolls for Germany, Austria, and Switzerland. Partner with external providers and internal stakeholders to ensure accurate and timely payroll reporting.

Senior Marketing Designer will develop creatives for social and display ads, collaborate with the marketing team, and optimize ad performance. Requires 3-5 years of graphic design experience, proficiency in design tools (Figma, Adobe Creative Suite), and experience creating static and motion ads.

Istec seeks a Business Development Engineer in West Germany to drive sales growth. Responsibilities include acquiring new customers, expanding relationships with OEMs, system integrators, and end users, and positioning Istec as a preferred supplier of vibration and speed monitoring solutions. Native German and professional English proficiency are required.

Experienced System Administrator to maintain MECM environment, implement Windows Client Lifecycle, and manage client security and compliance. Responsibilities include OS deployment, patch management, driver and BitLocker management, and scripting. Requires a degree in computer science/electrical engineering or equivalent experience with comprehensive knowledge of Windows client operating systems and Microsoft MECM.

Provide customer support for GRID's Odds products and trading-related services. Investigate customer queries and operational alerts, communicate with customers, and support issue resolution.

Senior Control Engineering & Modeling Engineer will monitor industry trends, develop technical solutions, and create dynamic system models. Requires a Master's or PhD in a relevant field and experience in control engineering, modeling, and simulation. Experience with MATLAB, Python, and AmeSim is preferred.

Design Consultant needed for part-time role (20-30 hours) in Munich. Guide customers through kitchen and storage projects, create initial layouts and proposals, and manage leads. Fluent German and English required, along with a design background and strong communication skills.

Designs and develops high-end C++ components for medical desktop applications, focusing on performance, stability, and scalability. Architects, implements, and reviews complex multithreading and parallelization concepts. Analyzes, refactors, and optimizes existing codebase, identifying bottlenecks and improving performance. Works closely with Architecture, QA, and Product Management to modernize legacy systems towards modern C++.

Develop and execute go-to-market strategies for tempmate offerings. Define product positioning, messaging, and buyer personas. Create sales enablement assets and own website optimization. Build and scale digital content and campaigns across channels.

Communicate the value of software solutions to enterprise clients. Deliver product presentations and technical demonstrations. Support Proof of Concept processes and conduct technical training. Resolve customer questions and build relationships with clients and partners.

Medical Director to co-develop medical strategy for Myasthenia Gravis (MG) in Europe. Lead data generation, analysis, and interpretation, safety monitoring, and post-marketing study reports. Provide scientific input for publications, communications, and real-world evidence generation. Deliver medical training and maintain deep scientific knowledge of Neurology/MG.

Supports the CFO with strategic, conceptual, and project-related topics, ensuring efficient decision-making processes. Prepares evaluations, presentations, and documents for executive-level review. Manages board and committee meetings and represents the CFO in internal and external meetings.

This part-time position is responsible for loading, unloading, shipping, receiving, scanning, sorting, and stocking packages. May utilize heavy machinery. Requires ability to lift up to 70 lbs. and flexible shift availability. Warehouse experience is preferred.

SQL Service GmbH seeks a Cloud Engineer to design, develop, and implement Microsoft Azure architectures. Responsibilities include optimizing cloud environments, providing support for cloud service operations, and contributing to DevOps CI/CD processes.

Product Manager will own and steer the product portfolio of lignin materials, defining specifications and strategies. The role involves collaborating with Sales, Product Stewardship, Quality, Operations, Supply Chain, Innovation, Application Development, Marketing, and Sustainability teams.