freelance English-speaking jobs in Mannheim

System and software test engineer to join a team focusing on silicon photonics testing. Responsibilities include designing, implementing, debugging, and executing tests for silicon photonics test equipment. Collaborate with development teams in Germany, China, and Japan. Bachelor's or Master's degree in Electrical Engineering, Computer Science, or a related field required. Experience in software and system testing, especially test automation and exploratory testing, is necessary. Good understanding of digital electronics and optical communication, Java programming language, and Linux operating system are also required.

Senior Marketing Designer will develop creatives for social and display ads, collaborate with the marketing team, and optimize ad performance. Requires 3-5 years of graphic design experience, proficiency in design tools (Figma, Adobe Creative Suite), and experience creating static and motion ads.

The Internal Audit unit seeks a Senior Auditor to conduct risk-based audits at group companies globally. The role involves analyzing business processes, identifying risks, developing audit programs, documenting findings, and communicating results to senior management.

Composite technician performs repairs and sealing on aircraft structural components. Requires completed traineeship or experience, knowledge of English, and teamwork skills.

The German Institute of Human Nutrition seeks two Postdocs to join the Department of Computational Precision Nutrition. Successful candidates will develop methods for analyzing digital N-of-1 trials and large epidemiological studies, contribute to software development, and perform data analysis and visualization. Expertise in Causal Inference, Statistics, Deep Learning, or Bioinformatics is required.

Über uns About usAre you ready to work where others go on vacation – or at least where the big ships sail? We are looking for dedicated service technicians who can confidently support our customers worldwide with their technical expertise. TasksAs the face of the company, you'll be right there on site when it matters most. Your focus will be on our high-quality control and alarm systems.

Doctoral candidate to investigate cavitation phenomena experimentally and through computer simulation. Develop and implement simulation models in the MESHFREE software and validate them with experimental data.

The European XFEL is seeking a researcher to work on a European-wide optics and metrology project. The role involves coordinating tasks related to the study of X-ray optics contamination, applying cleanroom technologies to recover optics, and characterizing optical surfaces using techniques like phase-shifting micro-interferometry, AFM, SEM, and spectroscopic ellipsometry.

Lead the European organization, driving business performance and sustainable growth across nine countries. Translate global strategies into regional actions and share P&L responsibility for the region.

Deliver and implement consulting projects for construction industry clients, advising on topics like industrialization, digital transformation, and strategic development.

Supervises electrical installation on a large-scale data center project in Germany. Leads a team of trades professionals, coordinates with other teams, and ensures work is completed safely, on time, and to specifications. Requires proven experience supervising electrical teams on large projects and strong understanding of construction sequencing.

International Payroll Specialist needed for fixed-term contract (July 2026 - December 2027). Process, audit, and reconcile international payrolls for Germany, Austria, and Switzerland. Partner with external providers and internal stakeholders to ensure accurate and timely payroll reporting.

Medical Director to co-develop medical strategy for Myasthenia Gravis (MG) in Europe. Lead data generation, analysis, and interpretation, safety monitoring, and post-marketing study reports. Provide scientific input for publications, communications, and real-world evidence generation. Deliver medical training and maintain deep scientific knowledge of Neurology/MG.

Senior Systems Engineers will build and lead operations and development teams delivering high-availability AWS services to EU customers. Responsibilities include contributing to the smooth operation of the European Sovereign Cloud (ESC), collaborating with global AWS teams, and influencing the evolution of AWS services.

Provide customer support for GRID's Odds products and trading-related services. Investigate customer queries and operational alerts, communicate with customers, and support issue resolution.

Develop, implement, and maintain security architecture to protect IT assets and data. Identify and assess security risks, develop mitigation strategies, and coordinate incident response. Collaborate with IT teams to implement security concepts and ensure compliance with policies and guidelines.

As a Sales Stylist, you will provide exceptional customer service, share product knowledge, and assist with store operations. You will help customers find their perfect fit and contribute to a welcoming shopping experience.

Fleet Repair Manager / Project Manager needed for Travemünde office. Leads and coordinates mobile repair teams, plans and supervises on-board repairs, manages technical projects, and ensures work meets technical, operational, and economic requirements. Requires a technical degree or comparable qualification, relevant maritime experience, and strong English skills.

UPS Engineer (m/f/d) needed for Infrastructure Business Area Project Office. Collaborate with stakeholders to define system requirements, perform site surveys, and develop UPS system configurations. Integrate UPS systems with other power infrastructure, provide technical consultation, and act as a subject matter expert. Minimum 5 years of experience in UPS system design, integration, and maintenance required. Bachelor's degree in electrical engineering, systems engineering, or a related field.

Sales Development Representative to drive growth in the Polish market. Responsibilities include outbound prospecting, lead qualification, and pipeline management. Requires fluency in Polish and English, strong communication skills, and experience in B2B sales.