ruby English-speaking jobs in Düsseldorf

The Helmholtz-Zentrum Hereon seeks a Scientist in Marine Digital Innovation to develop products for predicting and protecting marine biodiversity. The position focuses on coupled hydrodynamical-wind waves and sediment modeling within Digital Ocean Twins.

Part-time student job in a hostel kitchen and bar. Tasks include preparing buffets, assisting with inventory, and daily cleaning. Must be enrolled in university with a valid enrollment certificate and have B1 level German and English.

Senior Mechanical Engineer to lead mechanical design and coordination of data center projects. Responsibilities include system design, calculations, coordination with multidisciplinary teams, and ensuring compliance with German regulations and standards. Requires a Bachelor's degree in a relevant engineering discipline and experience delivering mechanical building services projects in Germany.

HARMAN seeks an EMI/EMC Simulation Engineer to build and lead an enterprise-grade virtual EMI/EMC capability. This role defines workflows, modeling standards, and toolchains to deliver predictive CE/RE/BCI/RI outcomes. Requires deep EM fundamentals, cross-functional leadership, and tool proficiency with Ansys AEDT or Siemens EDA.

Experienced DECT NR+ Wireless Systems Architect needed to lead architecture and design of wireless communication systems. Develop system concepts, conduct performance analysis, and contribute to implementation and optimization of DECT NR+ PHY/MAC protocol stacks.

Account Manager for the northern region of Germany. Develop regional sales plans, build customer relationships, and propose solutions to meet customer needs. Requires a scientific degree, 3-5 years of sales experience in immunochemistry/diagnostics, and fluency in German and English.

Senior Project Engineer to manage OFCI, OFE, and FIA processes for a data center construction project. Requires a Bachelor's degree in Engineering, 7+ years of project management experience, and 3+ years in data center projects.

Senior Associate / Director leads and delivers large-scale operational improvement engagements for private equity-backed food and beverage companies. Focuses on diagnosing performance, designing value-creation initiatives, and implementing sustainable improvements across manufacturing, production, and supply chain environments. Requires extensive experience in Food & Beverage, FMCG, or adjacent manufacturing sectors, with a proven track record working with private equity sponsors and portfolio companies. Fluency in English and German is essential.

Warehouse Logistics Specialist required for receiving, verifying, and storing goods. Must have forklift license, experience with warehouse management software, and proficiency in German.

Optical Engineering Intern to explore novel concepts, design optical models, and conduct experiments on photonic integrated circuits and fiber-to-chip interconnects.

The Project Manager provides standardized site support to wind farms in the German region, coordinating project activities and ensuring safe and efficient offshore operations.

Support the planning, coordination, and execution of marketing projects across influencer marketing, partnerships, offline activations, and creative campaigns. Prepare project briefs, maintain timelines, coordinate follow-ups, and ensure smooth communication between stakeholders. Assist with creator and partner research, campaign preparation, competitor monitoring, and market trend analysis.

Senior Solution Architect will design and support a distributed energy management system for construction sites within the Liebherr ecosystem. Requires experience with distributed IoT software systems, cloud mechanisms, and DevOps.

Ulm University's Medical Faculty seeks a Professor (W3) for Physiological Chemistry (f/m/d) to lead the Institute of Physiological Chemistry. The successful candidate will have an internationally recognized research and teaching record in physiological chemistry, biochemistry, or molecular biology.

Implement and configure Workday Employee Document Management for global customers. Lead workstreams, understand customer requirements, and design solutions. Support junior team members and share knowledge.

Working Student to support HR operations across the employee lifecycle for Poland & EMEA. Tasks include data administration, documentation preparation, and administrative support.

Chief of Staff to the Chief Product Technology Officer, managing operations, prioritization, OKRs, budget control, and strategic projects. Requires 5+ years of experience in a similar role, tech affinity, strong organizational skills, and fluency in German and English.

Evaluate and implement SAP master data processes for materials, business partners, and real estate objects. Design and integrate SAP MM standard processes with MDM strategies and SAP BTP services. Manage data migration and governance in an international context.

Experienced Business Travel Consultant needed for a fast-growing travel tech company. Must have previous business travel experience, proficiency in Sabre (other GDS considered), and fluency in German and English.

Delivers training for Beckman Diagnostics systems, applying classroom and virtual training methods. Develops, executes, and evaluates training programs and materials. Ensures compliance with safety, quality, and regulatory requirements. Builds relationships with subject matter experts to identify problems and provide solutions. Requires experience as a service, application, or trainer in chemistry, immunology, biology, or automation.