freelance English-speaking jobs in Bielefeld

Administrative Assistant / Accounting Clerk supports site management team in a construction project. Duties include posting accounting records, reconciling bank statements, processing invoices, issuing customer invoices, and managing expense notes. Requires a high school diploma, 2 years of relevant experience, proficiency in MS Office, and fluency in Spanish and English. German is a plus.

Senior SAP Project Manager needed for high-impact projects focused on SAP Cloud ERP transformation. Manage the full project lifecycle, act as a trusted advisor to customers, and drive projects with a focus on value creation and measurable outcomes.

Software Engineer to design, develop, and implement software components, products, and services. Collaborate in agile teams, evaluate new technologies, and contribute to continuous improvement. Requires a computer science degree and practical software development experience.

Senior Credit Manager responsible for risk analysis, credit decision facilitation, and ongoing management of real estate credit exposures. Requires experience in hotel investments, cash flow projections, and valuations.

As a Working Student in Communication & Content Creation, you will support the XReality editorial team with internal communication and content creation for platforms like the intranet. You will create engaging content, assist with image, video, and film material, and contribute to the development of creative communication formats.

Systems Engineer (m/f/d) for Airbus Defence and Space in Manching. Responsibilities include translating customer needs into system specifications, shaping technical roadmaps, driving UI development, and managing supplier collaboration. Requires a degree in Computer Science, Aerospace, or a related field, experience in system engineering, and familiarity with software technologies like C++ and Qt/QML.

Define and develop functional architectures for a subsystem of complex semiconductor systems. Analyze system requirements and derive technical specifications. Develop and evaluate models to validate concepts and integration strategies.

Lead and develop the IT team, defining and implementing IT strategy aligned with company goals. Oversee support across Microsoft 365, Active Directory, networking, VPN, and Windows/Linux server environments. Ensure stable and secure operation of all IT systems and endpoints. Manage IT procurement, assets, and inventory. Regular travel to the UK is mandatory.

Marketing & Communications Officer needed for a prestigious international institution. Develop compelling content, manage events, coordinate projects, and liaise with stakeholders. Requires 5+ years of experience, advanced PowerPoint and Excel skills, and fluency in English.

Experienced Process Modelling Expert needed for a 6-month+ SAP S/4 HANA transformation project. Focus on business process modelling across various areas including Idea to Market, Source to Pay, and more. Requires Signavio and BPMN 2.0 expertise.

Designs, builds, and deploys production-ready AI solutions, integrating AI into business systems and optimizing performance. Collaborates with clients to understand processes, identify automation opportunities, and drive AI-led change. Builds AI prototypes, demonstrates capabilities to prospects, and assesses client AI readiness. Requires 2+ years of AI/ML implementation experience, strong Python skills, and a portfolio of deployed AI systems. Fluent English required.

Define, develop, and execute test plans for 5G solutions (RAN and Core features). Collaborate with Product Management and Engineering teams as a test engineer and product expert. Perform end-to-end functional, performance, and interoperability tests. Validate features such as QoS, slicing, and handover. Provide first and second level support for the product.

Apple's Cellular Software team seeks engineers to develop core cellular technologies for iPhones, iPads, watches, and other products. Responsibilities include architecting, designing, and documenting cellular software, collaborating with cross-functional teams, and testing and verifying the protocol stack.

AI Engineer will design, implement, and manage document embedding storage solutions. Develop and optimize processes for information extraction from documents to create databases for chatbot applications. Contribute to the development and deployment of RAG-systems and explore multi-agent frameworks.

As an Inventory Assistant, you will ensure successful delivery of store implementation projects at client sites. You will catalog and verify client inventory, organize stores to brand standards, and deliver projects to agreed timescales.

Full-stack developer to redesign and implement existing application using preferred languages. Participate in software architecture and design decisions. Lead Developer or CTO role available. Expertise in JavaScript, Node, React, Redux, and SaaS experience preferred.

Senior Product Manager will lead product strategies for a new product line, conducting market research, collaborating with cross-functional teams, and ensuring product launch success.

Supports the coordination and administration of international licensing partnerships. Maintains partner records, agreements, and communication. Prepares documents and reports related to licensing activities. Ensures accuracy and completeness of licensing data. Collaborates with internal and external stakeholders.

Senior Finance Business Partner will drive financial value creation and profitability for Redcare Pharmacy's German market. You will analyze KPIs, evaluate commercial initiatives, and lead a FP&A team. Requires 8+ years of experience in Controlling/FP&A in a commercial, e-commerce environment and fluency in German and English.

The W2 Professorship for AI Infrastructure (f/m/d) at the Faculty of Computer Science and Business Information Systems involves application-oriented research and development projects, teaching, and promoting networking in the field of AI infrastructure. The successful candidate will establish a research group focusing on topics like distributed systems, cloud-native infrastructure, AI operationalization, and efficient data management. Teaching experience in AI and proficiency in English are required.