freelance English-speaking jobs in Bielefeld

Shape the future of AI-powered search across OLX verticals. Lead the design and evolution of the Search AI Platform, developing LLM- and GenAI-based systems. Guide a cross-functional team of ML engineers, data scientists, and platform engineers. Prototype, evaluate, and productionize new ML models, including embedding-based retrieval, personalization, and relevance optimization.

Lead Solutions Engineer will provide technical consultation to prospects and customers, supporting sales and channel goals. This role requires strong technical, business, and customer skills, experience in SaaS or technology product organizations, and experience with ITSM/ITIL and cloud-based infrastructure.

Leads and optimizes global parts coordination teams, ensuring efficient and timely delivery of parts. Manages a team of 27 members, develops processes, and promotes a healthy work environment. Requires a degree in technical or commercial studies and proven leadership experience managing international teams.

Data Scientist will design and refine trivago's marketplace, connecting travelers and hotels. Responsibilities include developing algorithms, collaborating with engineering teams, analyzing data to generate hypotheses, and creating statistical models. Requires 2+ years of experience in analytics, strong statistics and data analysis skills, and proficiency in Python or R.

Research Software Engineer / HIFIS Consultant will support planning, coordination, and reporting of software development tasks. Responsibilities include contributing to the development of state-of-the-art methodologies and software components, providing consultation on software engineering practices, and collaborating with researchers on software and data workflows.

Leads and manages departmental resources to implement, develop, and maintain production processes. Drives continuous improvement through Lean Manufacturing tools and process enhancements. Ensures compliance with KPIs, manages projects, and optimizes plant layout.

Leads the design and implementation of a centralized Digital Assurance Hub, orchestrating data streams into a single source of truth. Architects data integrations and ETL strategy, ensuring data integrity and security. Oversees verification of key controls and leads the quarterly verification program, translating findings into strategic risk insights.

Software Development Engineer to lead software development of robotic products for Amazon Logistics Delivery Stations. Responsibilities include strategizing, defining, and managing software development for robotics technologies, partnering with cross-functional teams to improve the customer experience. Requires expertise in industrial automation systems, communication protocols, and software development methodologies.

Manages regional after-sales service strategies, partners with agents, and optimizes service processes. Provides direct support for key accounts and develops the regional service network. Requires a bachelor's degree, 3+ years of relevant experience, and strong communication and problem-solving skills. Travel is required.

Develop and implement tools to facilitate access to DLR quantum computers. Collaborate with researchers to define requirements and support user adoption. Strong Java and Python skills, agile development experience, and knowledge of linear algebra are essential.

Responsible for the safe and efficient operation of HVACR systems across assigned vessels. Plans, coordinates, and oversees maintenance activities, implements technical improvements, and promotes safety and environmental protection. Conducts onboard inspections, supports Dry Dock activities, and manages HVACR documentation. Requires a degree in a relevant field and several years of experience with HVACR systems.

Lead strategy and roadmap for Amazon Music's personalization and AI foundations team in Berlin. Drive product development for infrastructure, scalability, and quality assessment approaches. Collaborate with scientists, engineers, and cross-functional partners to improve customer experiences.

About us Balda, based in Bad Oeynhausen, is a specialist in plastic components for the pharmaceutical, diagnostics, and medical technology sectors. Since 2016, Balda has been part of the Italian Stevanato Group, which has more than 5,000 employees worldwide.

Design, develop, and operate scalable software components across backend APIs and patient-facing applications. Collaborate with product, design, and medical teams to deliver new features and improve the platform. Drive technical excellence in architecture, code quality, and security. Mentor other developers and contribute to a platform powering regulated digital health products.

The Research Center Trustworthy Data Science and Security seeks a professorship in Human-centered Security. The successful candidate will conduct empirical research on IT Security from a user-centric perspective, addressing the interaction of users and technical systems. Applicants should have publications in technical and social science outlets and a strong interest in interdisciplinary research. Teaching load is reduced to four weekly hours per semester.

Implement features for the "Unified Remediation Engine" including backend services in Java and Python. Develop agent logic for self-healing workflows, write tests, and collaborate with senior engineers.

This role supports construction and program managers in establishing and maintaining health and safety standards across Amazon construction projects in MEU (Germany, Poland, Czech Republic, Slovakia & Austria). The successful candidate will ensure compliance with local regulations, analyze safety data, and collaborate with cross-functional teams to implement safety procedures and drive a positive safety culture.

The Zoological Collection of the Museum der Universität Tübingen seeks a Collection Scientist and Curator with a PhD, postdoctoral qualifications, and experience in museum collections. The position involves research, collection oversight, teaching, and securing external funding.

Invent representations that enable AI to understand matter. As an ML Researcher, Representation Learning, you will design representations for molecules, materials, and processes, test them in real discovery loops, and collaborate with scientists to push the boundaries of AI-native science.

Designs, develops, and validates high-performance power control and conversion hardware. Experience with power electronics design, component selection, simulation, PCB design, testing, and failure analysis required. Collaborates with cross-functional teams to deliver reliable, efficient, and cost-effective power solutions.