freelance English-speaking jobs in Bielefeld

Architect end-to-end digital ecosystems connecting frontends, backends, and AI systems. Collaborate with stakeholders to define system architecture, ensuring scalability, reliability, and maintainability. Design integration interfaces and pipelines for GenAI models, visual AI tools, and enterprise systems. Guide teams through security, observability, and deployment best practices.

Plan A seeks a Customer Success Manager to act as the point of contact for large global companies in EMEA. The role involves managing client relationships, providing expert guidance on sustainability and carbon accounting, and collaborating with internal teams to ensure customer success.

Software Architect to design and enhance machine-level application software for a high-throughput platform. Collaborate in an agile team to define requirements, guide architectural decisions, and participate in implementation, testing, and integration.

Security Architect responsible for implementing the Secure Development Lifecycle for measurement technology products. Conducts security risk management, develops security measures, and promotes a security culture. Requires a master's degree in a related field, experience with security solutions and frameworks, and strong communication skills.

Senior Technical Product Manager for a growing consultancy. B2B experience required, with a technical/development background and exposure to infrastructure products. Must be fluent in German (B2/C1+) and English. Remote with up to 3 days per week on client site.

Leads marketing strategy and activation for OTC brands (nicorette, Imodium, Dolormin, Olynth) in Germany. Partners with media, trade marketing, sales, and supply chain teams. Requires a university degree in business/economics with a focus on marketing and 4+ years of brand management experience.

Lead a product pillar strategy for a critical product area, driving deep multi-product penetration across customer employee bases. Build and coach a product team to deliver unified, AI-enhanced, and scalable experiences.

Database Administrator responsible for installation, administration, and operation of MS SQL Server databases. Duties include automation, monitoring, optimization, and analysis of database environments. Requires knowledge of database operation and optimization, independent work ethic, and strong communication skills.

As an Applied AI Solutions Architect, you will be a technical advisor to large enterprises, helping them understand and integrate Claude into their technology stack. You will guide customers from discovery through deployment, leveraging your expertise to design scalable architectures and address complex business challenges.

Launcher Assembly Technician responsible for the assembly, integration, and testing of launch vehicles. Requires vocational training in a relevant field, experience in aviation/aerospace, knowledge of gas/fluid bolting techniques, and fluency in English and German.

PhD position at the Institute for Molecular Pathogenesis, Heinrich Heine University Düsseldorf. Research focus: host-pathogen interactions, specifically how a host defense factor breaks down bacterial outer membranes. Requires M.Sc. in a relevant field, research experience in molecular biology, cell biology, and biophysics, and fluency in English.

Lead and support application onboarding to IAM platforms, collaborating with teams to architect, implement, and optimize secure identity solutions. Translate complex requirements into secure, user-friendly IAM solutions and stay hands-on with modern authentication and authorization technologies.

As a System Integration Engineer, you will ensure seamless product integration, robust test processes, and high quality operational performance. You will own KPI management, test equipment strategy, and NPI readiness while driving continuous improvement initiatives.

The GFZ is seeking a senior scientist to lead its Secondary Ion Mass Spectrometry (SIMS) user facility. Responsibilities include managing laboratory operations, advising scientists on SIMS applications, developing research strategies, and reporting on laboratory utilization. The successful candidate will have a PhD in the natural sciences, at least 5 years of experience with SIMS instruments, and expertise in mineralogy, crystallography, and sample preparation.

Research Assistant/Doctoral Student will work on research questions related to digitalization, sustainability, performance management, and CFO roles in corporate transformation. The position requires a strong interest in these areas, analytical skills, perseverance, a master's degree, and excellent English.

The Visiting Astronomer Travel Coordinator manages travel arrangements for Visiting Astronomers traveling to ESO observatories in Chile. Responsibilities include coordinating travel logistics, maintaining documentation, managing budgets, and providing administrative support.

Manage and coordinate the Service Desk team, ensuring smooth IT operations. Develop and implement IT strategies to improve services. Collaborate with departments to optimize IT services and user satisfaction. Handle user issues and escalations, ensuring high service quality.

Quantitative Risk Analyst will develop, maintain, and enhance quantitative risk and pricing models for market, credit, and liquidity risk. Responsibilities include designing and running Monte Carlo and scenario simulations, implementing models in Python, and collaborating with Trading, Risk, Finance, and Tech teams.

Cloud Engineer (Azure) will design, set up, and operate core cloud infrastructure. Responsibilities include integrating cloud services into the Developer Platform, implementing infrastructure as code, utilizing Azure services, and managing CI/CD pipelines.

Product Manager (f/m/d)* SEO/GEO will optimize the organic visibility of Engel & Völkers' website, impacting product development across 35+ countries. Drive and implement SEO strategies, develop product plans and roadmaps, and continuously assess and improve product performance in search interfaces.