freelance English-speaking jobs in Bielefeld

Drives new OEM business and accelerates growth of Custom Photonics Solutions across Europe. Develops new markets, customers, and projects, and leads sales initiatives. Qualifies customer requirements and collaborates with cross-functional teams to deliver tailored solutions. Acts as Key Account Manager for strategic customers and represents customer interests internally. Provides market insights, supports process improvements, and contributes to R&D and marketing strategy.

Working student supports the Brand Manager in projects and daily operations. Handles branding and design projects independently. Collaborates cross-functionally and provides administrative and editorial support.

Develop and manage international key accounts in the data center segment, building and maintaining long-term customer relationships at the C-suite level. Co-develop and implement the central segment strategy for data centers, developing go-to-market strategies and use cases. Build and maintain an internal cross-country data center community to foster knowledge exchange and synchronize activities.

Provides a warm and professional guest experience, sets up and clears breakfast buffets, prepares simple dishes, and supports the Community Team with front office tasks. Requires hospitality or similar experience, fluency in German and English, and willingness to work early and weekend shifts.

As a Solution Designer, you will translate complex business processes into software and workflow concepts, identify automation potential, and design intuitive user journeys. You will collaborate with Product Management, UX, and Development teams to support product development.

Postdoctoral Researcher to investigate hydrological/hydrogeological connectivity in the Elbe River basin. Develop a hybrid framework to approximate groundwater recharge and analyze groundwater resilience under climate change scenarios. PhD in Physics, Mathematics, or Geosciences required.

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.

We are seeking an Entertainment Writer to create engaging, trend-driven content inspired by pop culture, viral stories, and internet trends.

Test Engineer for Avionics and Weapon Integration (m/f/d) for Airbus Defence and Space in Manching. Responsibilities include reviewing avionics system requirements, defining test cases, developing test procedures, conducting system integration tests, and analyzing test results.

The Sustainability Coordinator will analyze sustainability KPIs, track progress, monitor regulations, and support compliance with certifications like Rainforest Alliance and Fairtrade.

This research position focuses on biocatalysis and data-driven optimization of bioreactions. The successful candidate will conduct research, teach, prepare publications and grant proposals, and participate in administrative tasks.

Manage and optimize pricing and yield strategies across a portfolio of European markets. Monitor demand, competition, and market dynamics to identify revenue opportunities. Provide analytical oversight and insights to support data-driven decision-making.

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.

Experienced Drone Operators with wind turbine blade inspection background needed for international projects. Perform damage inspections, plan drone flights, and support data classification and reporting.

Drive sales of Copperleaf software solutions to target accounts in the Nordics region. Identify, pursue, and close new sales opportunities, building and maintaining relationships with key decision makers.

Develop and iterate on features from scoping to shipping. Maintain and extend codebases with a focus on quality and speed. Utilize AI coding tools as your primary workflow. Analyze product metrics and bring a technical perspective to product discussions.

Investigate electronic structure and dynamics in magnetic thin films and heterostructures using spin- and time-resolved photoelectron spectroscopy. Conduct experiments, analyze data, write publications, and supervise students. PhD in Physics required. Experimental expertise in surfaces or magnetic thin films and heterostructures using time-resolved spectroscopy, femtosecond lasers, and ultrafast spin and magnetization dynamics is desired.

Senior Medical Director to lead global Phase 3 MS study. Define medical strategy, oversee protocol development, and manage regulatory interactions. Requires MD, 3+ years industry experience in MS clinical trials, and expertise in GCP and regulatory requirements.

The Research Training Group 2950 SyMoCADS offers 9 doctoral research positions and 1 postdoctoral position in various fields related to microfluidic control (MC). Applicants must hold a Master's degree (for doctoral positions) or a Ph.D. (for the postdoctoral position) in a relevant field. Specific degree requirements vary by project.

As a Cash Collection Specialist, you will manage overdue accounts, contact customers regarding unpaid invoices, and negotiate payment plans. You will collaborate with sales and finance teams to resolve billing issues and ensure timely collection of outstanding debts.