freelance English-speaking jobs in Bielefeld

Senior Mobile Product Designer will participate in presales activities, lead discovery and UX architecture, and create prototypes, user flows, and mockups using Figma. Must have advanced Figma skills, mobile-first expertise, and experience in user research and usability testing. Portfolio showcasing both polished work and raw materials is required.

Recruiting Coordinator (Contract) will schedule interviews, manage candidate communication, and assist with onboarding. Requires 1+ year of experience with Google Suite, Applicant Tracking Systems (Ashby preferred), and strong communication skills.

Senior Product Analyst will design and run A/B tests, sequential tests, and other experimental frameworks to measure the impact of product changes. Responsibilities include applying statistical methods, partnering with product teams, and communicating findings to stakeholders. Requires hands-on experience designing A/B tests, deep knowledge of statistical methods, and strong Python and SQL skills.

Internship/Master Thesis opportunity at ZEISS for students in computer science, robotics engineering, or electrical engineering. Develop computer vision methods for tracking deformable objects.

Maintains and enhances the quality management system, ensuring BSI C5 compliance and ISO 9001 standards. Defines, adapts, and monitors software development and related service processes. Conducts internal audits and supports external audits. Ensures process and quality documentation is accurate and up-to-date. Collaborates with stakeholders to drive quality and continuous improvement.

Maintenance Technician responsible for technical product maintenance according to manufacturer specifications. Performs DGUV V3 tests to ensure product safety. Requires vocational training in electrical engineering, electronics, or mechatronics, PC knowledge, and a Class B driver's license. Position involves frequent travel with overnight stays.

Postdoctoral researcher to advance in situ µCT experiments at PETRA III, focusing on fatigue of magnesium-based implants. Responsibilities include improving tensile testing setups, enhancing tomographic reconstruction methods, and implementing multimodal measurement workflows. PhD in Physics/Computer Science or similar required, with hands-on experience in experimental control and programming skills.

Senior Medical Writer with native or near-native German-English proficiency required to develop scientific and medical materials for the biopharma industry. Must have a PhD in medical, life, or health sciences or a Masters degree in life sciences and at least 3 years of experience as a medical writer.

Senior Scientist to plan, implement, and document experimental work for development and validation of nucleic acid-based kits. Conduct research and functional supervision of technical staff. Promote development projects from idea to implementation and certification.

Lead procurement and supplier management for the Corrugated Boxes category. Engage with stakeholders to define requirements, ensure KPI achievement, and drive category strategies.

DevOps Engineer (SRE) with expertise in Azure environments, N8N, and .NET is needed for a financial client in Berlin. Must have experience with Azure Key Vault, PostgreSQL, and AgenticAI. Familiarity with TypeScript, Kubernetes (AKS), and N8N enterprise governance is desired.

Cloud Engineer needed for operation, monitoring, and development of Azure-based cloud services. Building, maintaining, and optimizing CI/CD pipelines. Enhancing cloud architecture, collaborating on technical issues, and supporting customers with cloud deployments. Requires a degree in computer science or related field, experience with Azure, CI/CD, container technologies, and SAP integration scenarios.

IT Infrastructure Coordinator & Project Manager responsible for stable IT operations, user and license management, and leading IT projects. Requires experience in IT operations, cloud technologies, and project management methodologies.

Investment Intern or Working Student to join the Max-Planck-Förderstiftung team in Munich. Support the management of a globally diversified portfolio and contribute to funding scientific research.

Experienced IT Services Procurement Manager needed to lead global sourcing, vendor management, and procurement operations for a large international technology company.

Doctoral Researcher position available in digital platform ecosystems at the University of Passau. Applicants must have a master's degree in a relevant field and strong analytical skills. The position is fully funded for three years.

Senior Specialist Total Rewards EMEA will manage compensation cycles, analyze data, and develop recommendations. Responsibilities include designing and enhancing benefits programs, maintaining job frameworks, and advising on compensation topics. Requires a university degree, experience in compensation and benefits, and expertise in analytics and HRIS systems.

Experienced Rewards & Benefits professional designs and implements Total Rewards solutions aligned with organizational strategy. Focus on pay transparency, job architecture, and reward frameworks. Supports clients in preparing for and implementing the EU Pay Transparency Directive.

The Helmholtz Centre for Environmental Research (UFZ) seeks a social-ecological scientist to lead stakeholder engagement and co-production processes for the BirdFutures project. This role will develop sector-specific scenarios of future developments (e.g., farmland, forestry) in collaboration with stakeholders from conservation, business, and finance. The successful candidate will integrate stakeholder knowledge into biodiversity modelling and the development of decision-support tools.

Junior Software Developer will work in a team to implement IT projects, optimize IT processes, and develop travel-specific IT systems. Responsibilities include analyzing the status quo, designing KPIs, implementing optimizations, and supporting personnel development measures. Requires a university degree in a relevant field and proficiency in at least one programming or scripting language. Strong analytical, problem-solving, and communication skills are essential.