freelance English-speaking jobs in Bielefeld

Heidelberg International School seeks an experienced and inspirational leader to serve as Secondary School Principal. The role involves leading a teaching team, developing instructional programs, ensuring student success, and fostering positive relationships within the school community.

Leads sales strategies for residential energy storage systems in Germany. Manages relationships with distributors and strategic accounts. Provides training and support to partners. Requires 3+ years of sales experience in the new energy and power system industry, with a focus on project sales.

This role involves maintaining and extending the company's cloud-based Business Intelligence environment, including Power BI, SSRS, and SSAS. Responsibilities include ensuring reliable operation of BI services, managing Azure and Google Cloud Platform environments, and processing large datasets. The ideal candidate has five years of experience in database DevOps engineering, software development, or data engineering with a strong background in Python or Java. Experience with Big Data Cloud Services, Microsoft Azure, and SQL is required.

documenta und Museum Fridericianum gGmbH seeks an organized and responsible Employee/Deputy Manager Infrastructure to manage logistics, infrastructure, and operational aspects of the documenta exhibition.

Working students support Finance Excellence initiatives to strengthen, standardize, and develop global finance processes. Tasks include process analysis, documentation, and improvement, data analysis, and contributing to finance digitalization.

Experienced Software Engineer needed to maintain, enhance, and optimize COBOL applications in mainframe environments. Participate in legacy system modernization and ensure application quality through testing and documentation.

Junior Cyber Strategy & Architecture Consultant (m/w/d) supports clients with security posture reinforcement. Tasks include assisting with security program implementation, refining governance, policies, and processes, and supporting ISMS implementation. Requires a bachelor's or master's degree, basic cybersecurity knowledge, and excellent German and English communication skills. Must be a citizen of a NATO member state.

Experienced Clinical Research Associate needed for full-service CRO. Medpace provides Phase I-IV clinical development services to the biotechnology, pharmaceutical, and medical device industries. Sign-on bonus up to 7,500 EUR based on experience.

Become a part of a team leading the AI-first data revolution. Learn and contribute to our internal knowledge base, marketing, and sales processes. Support recruiting, operations, and people operations. Manage projects and potentially grow into a chief-of-staff role.

Deliver groceries to customers efficiently by e-bike or e-scooter. Meet and exceed delivery targets while providing exceptional customer service. Earn at least €13.90 per hour plus tips.

Legal Specialist - German Speaker will provide corporate governance, commercial contracts, intellectual property, and operational legal support for a fast-moving European business.

Develop and maintain IT infrastructure, including CI/CD pipelines and cloud resources (AWS, Azure). Write scripts and tools for agile software development, evaluate new technologies, and ensure secure and stable operation of high-performance systems.

As Country Medical Director, you will represent Regeneron in Germany for all Medical Affairs and Clinical Development activities. You will shape the national medical strategy, lead scientific engagement with external experts, and provide medical support to clinical operations.

Leads a team of software development engineers, security engineers, and data scientists to develop security solutions at scale. Manages the definition and development of multi-tier web services and has experience with the full software development life cycle.

Support the Regional Management Team in analyzing and preparing data from international subsidiaries. Develop and optimize BI solutions, translate data into reports, and participate in international projects.

Experienced SAP Program Manager needed for large-scale S/4HANA programs, focusing on HCM, finance, or controlling. Manage projects, teams, budgets, and risks. Must have strong program management experience and fluency in German and English.

Senior Backend Engineer to develop scalable microservices using C#/.NET, ASP.NET Core, and Azure cloud services. Requires 4+ years of experience with .NET, microservices, REST APIs, and event-driven systems.

Senior SRE to contribute to scaling and guiding the architecture of the compliance and investor relations platform infrastructure. Will work in a complex, multi-cloud environment spanning AWS public and private clouds. Requires deep proficiency with Terraform and Kubernetes, and advanced technical expertise in Observability, Distributed Systems, and High Availability.

Senior Project Manager will oversee program aspects, develop project plans, and monitor progress across design, applications, and operations. Requires a Master's degree in Electronic Engineering or related field and 10+ years of project management experience in the sensor or semiconductor industry.

Power BI Developer needed for a 3-6 month project. Migrate existing Excel reports to automated Power BI dashboards. Build data models, queries, and refresh processes. Connect data sources and work with stakeholders to refine reporting needs.