ruby English-speaking jobs in Düsseldorf

Experienced Business Development Representative needed to drive enterprise customer growth. Fluent German required. Proven track record of exceeding sales targets and building strong customer relationships.

Account Manager to grow and manage distribution business for industrial lubricants. Develop and execute sales strategies, collaborate with OEMs, and provide technical support. Requires 10+ years of relevant sales experience, including distributor management, and fluency in English and German.

For our primary school in Frankfurt, Germany we are looking for a motivated and qualified Teaching Assistant (in full-time or part-time), starting at the next possible date.

Lead Integration Architect will develop and implement a company-wide integration strategy for the Liebherr Group. Responsibilities include analyzing existing integration solutions, leading a strategic integration project, and establishing a governance framework for interface standards.

AI Model Validator / Auditor assesses, validates, and certifies AI systems before deployment, ensuring robustness, explainability, and compliance with regulations.

Leads full-cycle product R&D for fully automatic coffee machines, including structural scheme definition, design, and mass production launch. Develops new-generation coffee machine platforms and provides technical guidance to junior engineers.

Nachhilfeunterricht seeks motivated tutors (m/w/d) to teach students online or in person across Germany. Teach subjects you are confident in and enjoy, adapting lessons to individual student needs. Strong knowledge in at least one subject and a passion for teaching are required.

The Head of Accounting will oversee the company's accounting function, ensuring accurate financial reporting under German GAAP (HGB) and collaborating with external partners. This role requires strong operational and process improvement skills, experience with SAP S/4HANA Public Cloud, and fluency in German and English.

As an EMH Specialist Systems Engineer, you will define and implement EMH requirements for aircraft systems, analyze system architectures for EMH protection, and manage certification activities. You will collaborate with Airbus Engineering departments to ensure the design of safe and robust systems.

Materials Science Expert needed for a remote, part-time contract role. Develop problem sets using phase diagrams, micrographs, and stress-strain curves. Annotate tasks and evaluate AI model performance. PhD in Materials Science, Metallurgy, or related field required. Fluency in phase equilibria, mechanical behavior, crystallography, polymers, or characterization methods preferred.

Develop utility-scale PV and BESS projects from site identification to construction readiness. Secure land, manage permitting, and coordinate zoning and approval processes.

Lead Data Engineer will design, build, and evolve scalable data platforms and architectures. Guide project teams, translate business needs into data solutions, and optimize data workflows.

Risk Analyst – B2B will lead the redesign of B2B underwriting models, including scorecards, decision engines, and rating methodologies. Responsibilities include continuous improvement of data analysis and business processes, building harmonized credit frameworks, and partnering with Data Science to develop ML-based credit models.

Leads channel partner relationships, executes channel strategies, and drives partner initiatives for a global renewable energy technology leader.

Associate to join the Debt Structuring & Portfolio Management team, focusing on infrastructure and private debt. Support deal structuring, manage existing investments, and prepare investor reports. Requires a degree in a relevant field and at least three years of experience in infrastructure debt/project finance/structure finance. Strong German and English language skills are essential.

Lead the design of complex digital products end-to-end, from concept and UX strategy through to scalable UI systems and implementation. Translate research insights, product ambition, and brand direction into clear interaction models, intuitive user flows, and high-quality interface design. Work closely with product, engineering, research, and strategy teams to shape feasible, forward-thinking solutions. Design AI-powered interactions such as conversational interfaces, adaptive systems, and personalization patterns. Drive iteration and validation cycles, using user feedback and data to continuously refine and elevate the product experience. Contribute to and evolve scalable component architectures in Figma, ensuring consistency, efficiency, and long-term maintainability. Establish and refine collaboration workflows across design, product, and engineering.

Leads group for clinical trials and development programs in functional gastrointestinal and gastrointestinal motility disorders. Responsible for clinical development strategy and scientific integrity of trials. Collaborates with cross-functional teams and stakeholders.

Principal Consultant – Underground Operations will diagnose operational challenges, analyze production data, and implement solutions to improve underground mining operations. Requires 15-20 years of experience in underground mining operations, mine engineering, or operational improvement roles.

Act as a financial business partner for the Dairy Category, providing insights and driving data-driven decisions. Ensure accurate month-end closings, own the forecasting process, and support finance transformation.

Develops clinical education materials and provides clinical expertise on devices, procedures, and protocols throughout clinical investigations. Educates and trains physicians and hospital staff on device handling, implantation, and troubleshooting. Provides feedback to improve training materials and validates center, physician, and staff certifications.