freelance English-speaking jobs in Bielefeld

tesa offers an apprenticeship (Ausbildung) in Mechatronics/Chemistry or a dual study program. Join a leading manufacturer of adhesive tape solutions to drive innovation and reliability.

Senior Accountant to support German retail operations, managing accounting, financial reporting, and VAT compliance. Key duties include month-end close, cash flow forecasting, and leading the implementation of Microsoft Dynamics 365 Business Central. Requires German and English proficiency.

Teaches German language and cultural studies to elementary students. Responsibilities include designing lesson plans, instructing on host nation history and society, and coordinating field trips. Requires C1 proficiency in English and German.

Manage lead generation across LinkedIn, cold email, events, and Google Ads. Improve the lead engine by analyzing market data and testing new acquisition methods. Requires 2+ years of B2B lead generation experience.

Support international employee travel and manage immigration processes. Review travel sheets, answer visa/ESTA questions, and maintain accurate documentation in Workday. Requires advanced student status, detail-orientation, and strong English communication.

Postdoctoral Researcher needed to investigate and enhance bacterial degradation of polyethylene. Responsibilities include planning experiments, transcriptomic analysis, and process optimization. Requires a PhD and expertise in molecular biology and microbiology.

Power System Expert needed for EMT studies. Responsibilities include transient analysis, technical support, and developing PowerFactory examples. Requires Master's/PhD in Electrical Power Engineering and experience with EMT simulation tools.

Own the global materials expertise framework, translating standards into competencies. Partner with engineering and factories to ensure consistent training and certification, aligning with Windchill data.

Associate Partner in Chemistry manages sophisticated IP portfolios, drafts patent applications, and handles opposition proceedings. Requires 10+ years of experience, German/European patent attorney qualifications, and fluency in German and English.

Team Lead Cyber Security Operations sets up and maintains digital forensics and incident response tools. Responsibilities include SIEM improvement, automating tasks with Python, and developing incident response playbooks. Requires cybersecurity background, SIEM experience, and leadership.

Specialist Accountant General Ledger handles GL activities, fixed assets, reporting, and intercompany processes. Requires a Bachelor's in Business Administration, GL/Fixed Asset expertise, and SAP FI experience. Fluent English is required.

Freelance Data Scientist needed for temporary role. Manage end-to-end data solutions, developing and deploying predictive models. Requires advanced Python and SQL skills, strong analytical ability, and experience with financial data.

Experienced Technical SEO Manager needed to build and maintain scalable systems for organic growth. This role involves coding tools, managing crawl/index health, and communicating technical SEO needs to engineering teams.

Software Engineer role focusing on Simulation UI Systems. Responsibilities include gathering requirements, designing software foundations, and developing/maintaining software using C++ and Qt/QML. Requires a degree in Computer Science or Software Engineering and proficiency in C++ and Qt/QML.

Working Student Data Analytics for Infotainment Systems analyzes quality and usage data from customer vehicles. Tasks include applying AI/ML to large datasets and creating visualizations to improve customer experience.

Seeking a (Senior) Principal Device Engineer to join the global GaN team. This role requires deep technical expertise to solve complex challenges and turn ideas into practical, scalable solutions for power discretes.

Senior Security Assurance Specialist reviews security controls and audits findings. This role involves managing third-party risk, supporting audits, and tracking regulations like ISO 27001, PCI DSS, and NIST.

Drive operational execution for new product launches and changes. Own readiness from order to fulfillment, ensuring OTIF delivery by steering cross-functional teams across the global value chain.

Sr. Medical Science Liaison for Oncology in Southeast Germany. Act as a scientific partner to HCP/researchers, facilitating scientific exchange and gathering insights on Genmab's oncology portfolio. Requires advanced scientific degree and 2+ years of MSL experience.

Technical Superintendent needed to manage and maintain the technical standard of the fleet. Responsibilities include international ship visits, budget control, and planning maintenance. Requires engineering studies or similar qualification and fluency in English.