freelance English-speaking jobs in Mannheim

TechBiz Global seeks a Trainee Account Executive for a structured graduate program in B2B SaaS sales. This program offers clear career progression, with the opportunity to become a Junior Account Executive within 12 months. Responsibilities include outbound sales activities, lead qualification, and supporting the Account Executive team. Applicants should have a Bachelor's or Master's degree and strong communication skills.

Postdoctoral researcher (full-time) in the Department of Psychology at the University of Lübeck. The position is within the Obleser lab, focusing on cognitive neuroscience, systems neuroscience, computational modeling, or psychology.

Data Warehouse Engineer needed to design, build, and maintain scalable data warehouse architectures. Responsibilities include developing ETL/ELT pipelines, optimizing query performance, and collaborating with stakeholders. Requires strong SQL skills, Python experience, and knowledge of DWH concepts and technologies.

Accounts Payable Specialist needed for a fast-growing global logistics company. Process and manage invoices, verify payment requests, and reconcile vendor accounts. Mandarin Chinese fluency required.

Research Associate (f/m/d) to develop software for 3D rendering, visualization, and simulation-based system development. Focus on generating realistic virtual environments using Gaussian Splatting and other techniques. Requires strong C++ skills and a passion for 3D graphics and XR technologies. PhD pursuit encouraged.

Project HSE Inspector needed for a hydrogen infrastructure project near Düsseldorf. Responsibilities include on-site inspections, ensuring PPE use, verifying compliance with HSE procedures, and promoting a strong safety culture. Requires 3-5 years of experience as an HSE/Safety Inspector in the Oil & Gas industry, an internationally recognized HSE qualification, and proficiency in English and German.

The Service Manager ensures excellent customer service, manages daily operations, and develops service standards. This role requires strong technical knowledge of Segway products, fluency in German and English, and the ability to handle customer inquiries, process warranty claims, and collaborate with internal and external teams.

Benchmarking Engineer needed for automotive client in Ingolstadt, Germany. Prepare Teardown Highlights Reports for OEM competitor vehicles. Experience in automotive benchmarking and teardown reports, component- and system-level design, and cost, weight, manufacturing, and innovation analysis required.

The German Sport University Cologne seeks a W1 Junior Professorship in Data Science with a focus on multimodal training and movement data analysis. The successful candidate will develop approaches for training optimization in various sports contexts. Responsibilities include teaching and research, including participation in joint research activities and third-party funding acquisition. Applicants must have a PhD, relevant publications, experience with machine learning, and strong programming skills.

Develop and optimize digital customer journeys, focusing on top-funnel performance and new customer acquisition. Analyze user behavior, conduct A/B and multivariate testing, and translate data into actionable improvements. Manage and optimize campaigns across various platforms, including Meta, LinkedIn, and Google Networks. Collaborate with cross-functional teams to create cross-channel optimization initiatives.

Lead the development of self-driven laboratories for materials discovery. Integrate AI-based design with automated synthesis and testing. Manage experimental data and continuously improve machine learning models.

The Berlin Social Science Center (WZB) seeks a Post-Doctoral Research Fellow to lead the design, coordination, and implementation of a large-scale social science survey. Responsibilities include questionnaire development, pretesting, data management, quantitative analysis, and publication. The successful candidate will have a completed doctorate in political science, sociology, or a related field, strong expertise in quantitative methods and survey methodology, and experience with large-scale surveys.

Experienced Test Engineer needed to design and execute tests for cutting-edge autonomy products. Analyze system specifications to derive test cases, manage test scenario spaces, and allocate tests across various environments. Evaluate test runs, provide verdicts, and offer actionable feedback to development teams. Requires a solid understanding of autonomous driving, testing logic, and machine learning. Must have a driver's license (Class B minimum).

Experienced SAP QM consultant needed for S/4HANA RISE implementation. Lead QM workstream activities, translate business requirements into SAP solutions, and configure core QM functionality. Strong S/4HANA and RISE with SAP experience required.

Senior Sales Hunter to drive outbound sales of AI-powered hospitality SaaS across Germany. Proven track record selling POS, booking systems, or premium software to the German gastronomy sector required. Fluent German and English.

Project Manager to coordinate and manage digital projects across public and education sectors. Requires fluent German, 3+ years project management experience, strong stakeholder communication, and technical understanding.

Global SAP HRIS Manager to oversee planning, development, and management of SAP SuccessFactors and related HR technology. Responsible for process standardization, system lifecycle activities, and ensuring compliance with regulations. Leads HRIS operations, service management, project and change management, vendor and stakeholder management, and digital technology strategy. Requires 5+ years of experience with SAP HRIS, including Recruiting, Onboarding, Employee Central, Talent Management, Goals & Performance, Development, Learning, and Compensation modules. Fluent English required.

Project Manager to oversee planning, construction, and commissioning of utility-scale Solar PV projects. Manage budgets, schedules, risks, and team performance. Requires experience in renewable energy project management and fluency in German.

Production Operator supports day-to-day manufacturing operations including preparing production lines, operating machinery, handling documentation, and maintaining equipment.

Manage a team of mechanical engineers in the development of new medical devices. Responsibilities include people management, project staffing, and ensuring robust mechanical solutions. Requires experience in mechanical product development, leadership, and strong communication skills. Fluency in English is required.