freelance English-speaking jobs in Bielefeld

Drive technical development of innovative building envelope solutions for facades, roofing, and offsite applications. Coordinate development, testing, and qualification across international teams. Requires relevant technical degree and experience.

Build or improve real AI projects using open-weight and Gemini models. Work independently and asynchronously on tasks. Must actively build a project using AI tools and be comfortable with basic terminal setup on Mac or Linux.

Principal Technology Architect needed to transform photonics manufacturing expertise into next-generation equipment concepts for ZEISS. Identify bottlenecks and lead development for photonic integration in semiconductor manufacturing. Requires a graduate degree and 3-5 years of relevant industry experience.

Installation Manager leads mechanical and electrical installation and commissioning on large-scale European projects. This role supervises multidisciplinary teams, drives on-schedule execution, and ensures quality and safety standards are met. Requires 3+ years of relevant experience and proficiency in German and English.

Seeking a Dermatologist - Medical Director to provide medical and strategic leadership for clinical trials. Responsibilities include medical management, contributing to study reports, and developing new clinical projects. An M.D. degree is required.

Clinical Research Associate role involves delivering clinical trial monitoring, coordinating study setup, and maintaining documentation. Requires a degree in medicine or science, English and German proficiency, and willingness to travel approximately 60%.

Junior Area Sales Manager for the DACH Region. Support sales strategy, manage customer relationships, and develop new business in the industrial sector. Requires excellent German and English skills.

Drive tax reporting and technology across the group, supporting German and foreign tax obligations. Manage tax calculations for ~80 foreign entities, contribute to consolidated financial statements, and evaluate AI-enabled tax solutions. Requires 3 years of experience and fluency in German and English.

Assistant Store Manager supports the store manager to meet financial targets and ensure operational excellence. Requires 2+ years in retail management, people management, and fluency in English with good German.

Reliable couriers needed for a leading food delivery platform. Deliver food and drinks using a bicycle. Must be 18+, confident in city traffic, and have good communication skills in English or German.

Technical Specialist for ALD Coating System supports ALD equipment operation, maintenance, and servicing. Responsibilities include setup, routine checks, troubleshooting, and process data recording. Technical training and practical equipment experience are required.

Prepare competitive installation concepts for FACTS projects (STATCOM, SynCon, BESS) within international tenders. Develop strategies, cost estimates, and schedules while ensuring technical feasibility and alignment with execution requirements.

R&D Senior Engineer (f/m/d) acts as the agile team's "what" and "why" expert, owning and prioritizing the product backlog. Requires 5+ years in Software Engineering, knowledge of industrial protocols, and proficiency in Azure DevOps.

Establish and lead an independent junior research group within the "Balance of the Microverse" Cluster of Excellence. Requires PhD/postdoc experience in cluster fields and a strong research track record.

Finance and Accounting Manager for an investment platform. This role manages daily accounting, prepares financial statements, oversees AP/AR, and ensures compliance with HGB and IFRS. Requires 5+ years of experience and fluency in German and English.

Innovation Engineer to develop game-changing cycling technologies. Responsibilities include designing, building, and testing prototypes, and transferring innovations to product development. Requires a Master's in Electrical Engineering or related field and 2+ years of experience.

Experienced SAP CAR Consultant needed for a year-long assignment. Must have proven project experience with SAP CAR POS-DTA and SAP CAR-OSTA, including implementation and customizing. Fluent English is required.

Intern in Global Content Creation for Woundcare. Assist in creating influential videos on Marketing-Sales-Medical topics, mastering AI video generation tools, and managing end-to-end production for social media.

Manage end-to-end short- to mid-term supply planning for HVP manufacturing sites. Align demand, production, and inventory to support OTIF performance. Requires 5+ years in supply chain and SAP MM/SD experience.

Account Manager to drive construction solutions through customer partnership. Manage a portfolio, build relationships, and conduct high-level consultations. Requires 3+ years of outside sales experience and a hands-on attitude.