ruby English-speaking jobs in Düsseldorf

AirPlus seeks an experienced Strategic Account Manager to develop and maintain long-term relationships with key clients. This role supports the largest customer portfolio within the dynamic team at SEB Kort Group.

Process Engineer for Optical Metrology DUV. This role involves ensuring processes meet required standards within a modern, innovative setting.

Seasonal Stock Associate responsible for receiving, organizing, and maintaining store inventory. Duties include keeping the floor stocked, assisting with shipping/receiving, and providing customer service. Requires physical strength and attention to detail.

Advisor I, Sales interfaces with customers via inbound/outbound calls or internet to sell products/services. Responsibilities include processing orders, providing support, and achieving sales targets. Requires strong communication and customer service orientation.

Operations Human Resources Partner Intern to develop HR knowledge, assist with communications, training, and employee support. Requires C1 fluency in German and English, and a final-year university student background in related fields.

Specialist Accountant responsible for end-to-end General Ledger and Fixed Asset management for assigned entities. Core duties include month-end/year-end closing, reconciliations, and driving accounting standardization. Requires 3+ years of GL experience and IFRS knowledge.

Senior Quantity Surveyor / Commercial Manager to manage commercial delivery for high-voltage, substation, and civil works. Requires strong commercial background in quantity surveying or commercial management with M&E/MEP or civil project experience.

Experienced Medical Science Liaison specializing in Oncology sought. Responsibilities include establishing scientific collaborations, engaging healthcare providers, disseminating scientific information, and managing research interests. Requires a life sciences degree, 3 years of medical affairs experience, fluent German, and professional English.

Lead technical strategy for developer-facing AI agents, balancing prototyping and production delivery. Design scalable agentic infrastructure across full stack, from IDE internals to microservices. Requires 8 years in software development and 7 years in full stack roles.

Senior QA/QC Engineer specializing in Electrical systems for high-tech facilities. The role supports controlled and regulated manufacturing environments across sectors like semiconductors and pharmaceuticals.

Working student in Systems & Human Factors Engineering at Boeing. Responsibilities include defining, testing, and validating flight deck systems and avionics. Requires a passion for aviation and engineering.

Lead development and industrialization of SiC MOSFET and GaN HEMT technologies. Drive process integration, define roadmaps, and ensure robust processes for high-volume manufacturing. Requires expertise in semiconductor fabrication.

Co-Managing Director for an impact foundation. This role requires strong financial and analytical expertise to strengthen portfolio controlling, drive strategy, and scale social entrepreneur investments.

Internship Lab Assistant role supporting laboratory team activities. Responsibilities include seed preparation, lab assessments, field trial maintenance, and data management. Requires passion for plant production and training in agriculture or agronomy.

R&D Test Engineer for high-voltage products, focusing on gas-insulated switchgear. Plan and execute lab tests, analyze results, and collaborate with global R&D teams to ensure design requirements are met.

Zerspanungsmechaniker*in to manufacture large components for space programs like Ariane 6 and SLS. Responsibilities include machine setup, production inspection, and simple maintenance.

Lead the Research Unit "Water Resources and Environment" at UFZ, shaping scientific vision and managing personnel and finances. Focus on water security, hydrological processes, and societal impact.

Maintenance Technician for a Gigafactory. Responsibilities include preventive maintenance, troubleshooting production/assembly machines, and technical documentation. Requires relevant vocational training and experience with PLC programming.

Internship in Management Consulting supporting RWE's strategic initiatives. Tasks include data analysis, drawing conclusions, and preparing presentations for internal clients. Requires strong analytical skills and English fluency.

Working Student Sales for amateur football. Call clubs across Germany to win them to Prematch. Requires fluent German, good English, and a passion for football.