freelance English-speaking jobs in Bielefeld

Lead the Diagnostic Radiology Department, ensuring high-standard diagnostics and fostering interdisciplinary collaborations. Manage the department's budget, personnel, and development of key areas such as musculoskeletal radiology, oncologic imaging, and teleradiology.

Customer Solution Engineer will support application development projects across various industries, identifying customer needs and providing technical solutions. The role involves collaborating with internal experts, managing technical projects, and monitoring market trends.

Talent Acquisition Consultant needed for end-to-end recruitment in APAC and EMEA regions. Minimum 2 years of experience required. Proficiency in LinkedIn Sales Navigator and Mandarin is preferred. Must have strong communication and sourcing skills.

Mytheresa is seeking a Housekeeper to support the Housekeeping team in Leipzig. The role involves daily cleaning of kitchens and seating areas, preparing fruit for employees, and maintaining conference rooms. Experience in a similar position is preferred.

Lead and scale a high-performing marketing team across multiple channels and markets. Own and optimize the entire marketing funnel, driving strategic planning and OKRs. Monitor daily revenues, channel performance, and align with cross-functional teams.

Experienced Safety Manager needed for data centre construction project in Berlin. Lead and manage all HSE aspects, ensuring compliance with ISO 45001, ISO 14001, and ISO 9001. Develop and deliver HSE strategies, conduct audits, and investigate incidents. Provide expert guidance to site teams and subcontractors on all HSE matters.

Evaluate large language model responses to physics-related queries for accuracy and reasoning quality. Annotate model outputs, identify strengths and areas for improvement, and apply consistent evaluation standards. Must have a PhD in Physics or a related field and deep expertise in areas like Classical Mechanics, Electromagnetism, Thermodynamics, Quantum Physics, or Relativity. Significant experience using LLMs and excellent writing skills are also required.

Lead and mentor a team of developers, driving architectural decisions and coding standards. Design, develop, and maintain scalable web applications, architecting complex systems for reliability and security. Collaborate with product managers, designers, and stakeholders to deliver technical solutions aligned with business objectives.

Deck & Safety Superintendent responsible for safe operations, technical integrity, and regulatory compliance of vessels. Oversees deck & safety operations, budget management, and audit preparation. Requires a Bachelor's degree, at least 3 years of shipboard experience, and a valid IMO license.

Working student will analyze, rewrite, and create software requirements for the CDCC (Central Driving and Charging Controller) ECU. The role involves reviewing and fixing review findings, and communicating requirements to software teams.

Develop technical concepts and system layouts for robotic, intralogistics, and automated material handling solutions. Work with customers to understand operational challenges and translate needs into robust solutions. Produce design documentation, layouts, simulations, and proposals. Collaborate with sales, project management, and engineering teams.

Provides regulatory CMC advice to clients, ensuring compliance with drug development regulations. Prepares regulatory submissions and conducts gap analyses. Requires a PhD or master's degree in a relevant field and at least five years of experience in CMC development or regulatory affairs.

The Director Security Consulting (CEU, GEA, and SEU) drives security-related sales and project delivery across Europe. This role translates International SOS security strategy into actionable plans to expand sales. Responsibilities include market analysis, client relationship management, project leadership, and security offering development. Requires experience in security consulting, project delivery, and leadership. Fluency in English and German is essential.

MBA Intern to support the Office of the CEO in building scalable processes, driving data-centric decision-making, and executing strategic initiatives. Responsibilities include designing and implementing AI workflows, building data infrastructure, documenting standard operating procedures, and supporting strategic execution.

Global Head of OSD Quality Operations needed for a stable, growing international pharmaceutical company. This remote-based role reports to the Global Head of Quality and oversees multiple Quality Site-level leaders across Asia-Pacific. The ideal candidate will have 10+ years of experience in OSD Quality Operations, including experience in Asia-Pacific, and a strong ability to lead teams and cultural transformation.

Leads the end-to-end technology transfer strategy for next-generation solar manufacturing across internal and partner sites. Builds frameworks and manages program risk, IP protection, and manufacturing scale-up activities. Requires proven leadership in technology transfer, industrialization, or manufacturing scale-up within high-tech environments.

Senior Java Full Stack Developer needed for large-scale application design and development. Expertise in Java technologies, microservices, and modern front-end frameworks required. Experience with REST APIs, Spring Boot, and cloud platforms is essential.

Lead strategic projects and programs from concept to implementation. Operationalize strategic measures to facilitate transformation at PHOENIX group. Further develop the "Strategic Initiatives" department and co-create the Inhouse Consulting service offering.

The CROP project seeks a motivated intern to assist with cryogenic vapor distillation of soil and plant samples. The intern will also participate in field sampling campaigns, conduct basic data analysis, and collaborate with researchers.

Senior M&A Associate executes live mandates across sell-side, buy-side, and strategic advisory for a top-tier investment bank.