freelance English-speaking jobs in Bielefeld

The Senior Optical Validation Engineer develops and executes product- and system-level validation strategies for passive optical components and assemblies. Responsibilities include defining validation plans, test matrices, and acceptance criteria, developing optical test methods, and analyzing validation data to assess product performance.

Support Consultant analyzes and resolves software issues, conducts product tests, and creates technical documentation. Requires a bachelor's or master's degree and experience in software support, testing, or analyzing technical issues. Knowledge of SAP PLM, document management, CAD, or PLM systems is desirable.

Leads global organization developing holistic process know-how and datasets across multiple therapeutic modality workflows. Defines and executes innovation strategy, roadmaps, and execution plans for application & process development. Builds and mentors high-performing, multidisciplinary team.

PORR seeks a Package Manager to oversee a defined construction package on a large data center project. The role involves managing scope, drawings, specifications, and subcontractor deliverables. Requires a degree or technical qualification in a relevant field and 5+ years of experience managing packages or subcontractors on large construction projects. Fluency in English is required, German or Polish language skills are advantageous.

Strategic Category & Procurement Consultant needed for a 10-month project focused on optimizing Primary Substation Services across multiple grid operating companies. Expertise in energy, utility, grid, or infrastructure sectors required.

Experienced Project Manager to lead development and production projects for space and New Space applications. Responsibilities include managing time, scope, cost, and quality, coordinating subcontractors, and project reporting.

Annotate histologic and histopathologic morphologies on digitized slides to train deep learning algorithms for lesion detection and quantification. Support algorithm testing, application, and validation. Collaborate with cross-functional teams.

Lead and grow De Nora's Chlor-Alkali business across EMEIA. Develop sales strategies, manage a team, and build customer relationships to achieve ambitious sales targets.

Supervises mechanical construction activities for LNG tank projects, ensuring compliance with specifications, safety, and quality standards. Manages project progress, provides technical guidance, and coordinates with stakeholders. Requires a mechanical engineering degree and 15+ years of experience in large-scale industrial projects.

Experienced HSE Manager needed for a major offshore energy infrastructure project in Lubmin, Germany. Responsibilities include implementing and maintaining the HSE management system, preparing HSE documentation, conducting risk assessments, and leading a team of HSE Supervisors.

Experienced Senior Project Manager to lead large-scale enterprise security projects in Germany. Manage all aspects of project delivery, from planning and scheduling to technical installation and commissioning.

Brand Manager for Danone's successful brands (Volvic, Activia, Actimel, Alpro) in the DACH region. Develop and execute brand strategies, analyze market trends, and manage A&P budgets. Drive growth plans, manage activations, and lead cross-functional projects.

Lead and grow Fresha's offering in Germany and the DACH region. Build and scale a high-performing local team, drive commercial activities, and develop and execute a regional sales strategy.

Service Engineer Interns will gain hands-on experience operating and maintaining the Proton Therapy System (PTS). Interns will assist with troubleshooting, preventative maintenance, system inspections, and hardware/software testing.

Manages two on-premises data centers, handles hardware, software, and network components, and proactively monitors systems. Installs, configures, and maintains servers, operating systems, and applications, including a SQL cluster. Provides first-level support to colleagues and implements robust backup strategies.

Project Manager to oversee IT infrastructure projects in hyperscale data centers across Europe. Manage site operations, coordinate teams, and ensure on-time, on-budget project delivery.

The DZNE seeks an infrastructure engineer with expertise in HPC systems, including Linux, compute nodes, storage, networking (InfiniBand), GPUs, and cluster infrastructure.

Document Controller needed for a major data center project in Frankfurt, Germany. This role ensures project documentation adheres to company standards and the Integrated Management System (IMS). Responsibilities include document distribution, tracking, register maintenance, data analysis, reporting, and liaising with stakeholders. Minimum 2 years' experience in a similar site-based role is required.

Leads tax agenda for international decisions across Allianz entities, driving tax structuring and execution of acquisitions, divestments, and restructurings. Designs, implements, and manages tax planning initiatives to optimize effective tax rate and cash tax outcomes. Identifies, assesses, and mitigates tax risks in complex international matters.

Senior Product Manager will own a core product area of the ATS, defining vision, roadmap, and driving execution. Responsibilities include prototyping, building, and shipping AI-powered features, collaborating with cross-functional teams, and staying close to user and data insights. Requires 5+ years of B2B SaaS product management experience, hands-on experience shipping AI-powered features, and proven ability to lead large cross-functional teams.