freelance English-speaking jobs in Bielefeld

Experienced Oracle DBA (L3) to support and manage high-performance Oracle database environments. Expertise in Exadata, RAC, ASM, Dataguard, and Performance Tuning required.

Working Student to support the Transfer Pricing and Tax Team in daily operational activities, including corporate tax and transfer pricing tasks.

Field Service Engineer to support customers across Europe. Install, test, and qualify semiconductor equipment. Provide technical support, troubleshooting, and repair. Develop solutions for product reliability improvements. Bachelor's degree in electrical or mechanical engineering and 7+ years of experience in semiconductor or related fields required.

Leads and scales a platform-driven organization covering viral vector process development and GMP manufacturing. Oversees the full lifecycle of client programs, ensuring reliable, scalable, and high-quality GMP execution.

Process Planner / Production Planner (m/f/d) for a full-time position (35 hours/week) with experience in the automotive sector. Responsibilities include planning, optimizing, and industrializing manufacturing and assembly processes. Experience in the Mercedes-Benz environment is desirable.

Working Student supports the Customer Success team in managing client relationships. Responsibilities include preparing client-facing materials, analyzing data, and assisting with onboarding and meetings. Must be enrolled in a Bachelor's or Master's program and have strong communication and data analysis skills.

Manages the Maintenance team, ensuring adherence to customer contracts and quality standards. Develops and implements Maintenance plans, coordinates with customer operations, and oversees team performance. Requires a degree, 8+ years of experience in mobile telecommunications maintenance, and strong communication and management skills.

Leads a team of Data Scientists focused on maximizing the impact of real-time courier incentive systems on supply quality, earnings fairness, and operational efficiency. Owns the data science strategy for courier compensation models, dynamic boost and surge mechanisms, and engagement incentives. Drives business impact by owning key courier supply KPIs and ensuring the team focuses on high-leverage interventions. Leads deep diagnostic analyses of supply shortfalls and incentive inefficiency, translating findings into concrete modeling strategies. Serves as the primary interface between the Data Science team and senior stakeholders across Product, Operations, Finance, and Legal. Oversees the development of models that predict local supply-demand imbalances and compute optimal real-time boost levels. Ensures pay models are auditable, consistent, and free from unintended biases. Collaborates closely with Machine Learning Engineers to ensure models are deployed with robust documentation and production-ready validation pipelines. Leads the design and execution of experiments to measure the true causal impact of pay changes and new incentive structures. Builds frameworks for measuring incentive efficiency and guides the team towards optimization strategies. Synthesizes large-scale geospatial and temporal courier data into actionable modeling and policy recommendations.

Lead a central IT team, drive the development of the digital landscape, and ensure the stable operation of IT applications. Manage IT projects, implement strategy, and analyze/optimize processes.

HR & Administration Specialist needed for a fast-growing global logistics company. Manage employee attendance, scheduling, recruitment, and facility operations. Bachelor's degree required, fluency in Mandarin, English, and German.

Customer Support Specialist needed for a growing health and wellness company. Provide customer service via multiple channels including email, phone, and messaging apps. Support customer orders, answer product questions, and collaborate with internal teams. Fluent German and Russian required, good English skills necessary.

Hitachi Energy seeks a Project Engineer to lead and execute complex engineering projects. Responsibilities include technical planning, design, development, and implementation, serving as the primary technical point of contact, and ensuring project adherence to timelines and budgets.

Experienced AWS Cloud Engineer needed to design, operate, and improve highly available, scalable cloud platforms for a Front Office Power Trading team.

Senior Analyst to support M&A, investments, and strategic initiatives within the German healthcare market. Requires 3-5 years of experience in transaction advisory, corporate finance, or corporate development. Strong analytical skills, financial modeling experience, and fluency in German and English are essential.

Project Manager responsible for conducting cybersecurity assessments, penetration testing, and vulnerability analysis. Requires expertise in cybersecurity tools, techniques, and attack methodologies, with a strong programming background.

As the first dedicated product designer at tracebloc, you will own the entire user experience of our federated learning workspace. You will research, design, and prototype across web and SDK touchpoints, including information architecture, visual design, and the design system.

Lead venture creation from opportunity identification to company launch. Identify market opportunities, design new companies, recruit venture CEOs, and build a portfolio of independent businesses. Must have direct experience launching ventures, startups, or new business units.

Data Analyst (m/f/d) will explore datasets, evaluate data quality, and apply statistical methods to understand consumer behavior. The role involves collaborating with data scientists and engineers to build analytical solutions, visualize data, and provide data-driven insights. Requires a Master's degree in a numerate field and 2+ years of data analysis experience.

Finance Operations Analyst to drive process improvement and operational excellence across Verve's finance function. Map, document, and analyze end-to-end finance processes, identify inefficiencies, and lead delivery of improvements. Partner with NetSuite and systems team to embed process improvements. Support onboarding and integration of acquired entities. Track KPIs and operational metrics. Contribute to the broader transformation roadmap.

Support a newly elected workers council and employee relations matters. Collaborate with stakeholders to ensure alignment and effective communication. Engage in talent strategy for Central Europe, focusing on employee experience. Utilize technology and data analysis to enhance HR processes.