freelance English-speaking jobs in Bielefeld

Develop and improve time-series forecasting and optimization models for industrial energy use. The role involves probabilistic forecasting, uncertainty modeling, and integrating models into live industrial systems.

Seeking a (Senior) Buyer for Premium/Luxury Brands. Responsibilities include purchasing third-party brands, managing supplier relationships, and monitoring unit performance. Requires fashion passion, negotiation skills, and fluency in English and German.

Construction Manager for onshore wind projects. Take full responsibility for construction budget and schedule, leading all phases from planning to handover. Requires civil/industrial engineering degree and relevant construction management experience.

Experienced Project Director needed to lead a large-scale data center construction project. Full project lifecycle management from concept design to handover, ensuring safety, quality, schedule, and cost objectives are met.

Experienced IT Program Manager needed to lead complex programs from Germany. Requires 12-15 years of global delivery experience, managing offshore teams, and familiarity with AI Native frameworks. Minimum C1 German proficiency is required.

Define and lead the AI-for-Materials agenda, inventing learning paradigms for AI to reason about matter. This role requires a PhD in ML and 7+ years of AI research experience, ideally with a background in physics or chemistry.

MSAT Senior Scientist supports technology transfer, process validation, and manufacturing support in a pharmaceutical environment. This role involves cross-functional collaboration, data analysis, and technical documentation. A degree in a relevant science and industry experience is required.

Power Plant Electronics Technician responsible for maintaining and installing electrical components on production equipment. Duties include PLC optimization, troubleshooting, project assignments, and energy system maintenance. Requires vocational training and electronics technician experience.

Salesforce Platform Architect (m/f/d) will design, implement, and manage Salesforce solutions for sales, service, and marketing operations. Responsibilities include collaborating with stakeholders, developing technical designs, ensuring platform scalability and security, and providing technical leadership.

MIG welder needed for assembly and car body welding (including out-of-position welding). Requires DB standards certification, experience with technical drawings, and proficiency in MIG welding (aluminum).

Lead enterprise architecture and portfolio for a major fashion/retail client. Manage architecture repositories, drive governance, and provide data-driven insights using AI tools. Requires 7+ years in EA/APM.

Drive growth for Reckitt's Auto Dish portfolio across Europe. Lead commercial activations, innovation launches, and integrated communication plans. Requires 5+ years in FMCG marketing with strong commercial acumen.

The Head of Transportation & Foreign Trade EMEA manages transportation service providers, overseeing inbound/outbound freight, P&L budget, and import/export strategy. This role leads teams and drives continuous improvement.

Finance Assistant role requires accounting/finance experience, basic accounting knowledge, and MS Excel proficiency. Responsibilities include travel expense management, accounting support, and data organization. Fluent German and English are required.

This role involves processing maintenance requests, managing inventory discrepancies, and coordinating production schedules for various systems. Key duties include operating GCSS-A/STAMIS systems and reconciling financial accountability. B2 English and German proficiency are required.

For our secondary school in Heilbronn and Erlenbach we are looking for a Biology Teacher (Bilingual: German & English) (in part-time or full-time)

Postdoctoral Researcher to investigate ultrafine particles around Frankfurt airport. Focus includes running atmospheric chemistry transport models and developing geostatistical interpolation methods for concentration data. Requires a PhD and strong programming skills.

Support daily operations of a Customer Experience Center by coordinating lab operations, facility management, EHS, and inventory control. Manage equipment, ensure safety compliance, and maintain professional lab environments.

Master's thesis focusing on single cell analysis of tumor infiltrating leucocytes in microfluidic well arrays for cancer immunotherapy. Tasks include concept development, model establishment, and protocol optimization.

Independent Risk Management Director to serve as senior second-line risk leader for the Invest business. Requires deep expertise in broker-dealer and investment advisory risks, overseeing operational, fraud, technology, credit, and third-party risks.