ruby English-speaking jobs in Düsseldorf

Develop and support Tonic software, controlling goods flow in horizontal sorter systems. Responsibilities include analyzing issues, implementing changes, conducting tests, and providing customer support. Requires proficiency in C++, C#, SQL, and experience with Linux, .NET Framework, and Azure DevOps Server.

Senior Data Analyst to develop sophisticated analyses of data from tactical simulations, agent behavior, and sensor systems. Develop metrics and evaluation logic for defense-related issues and build analysis pipelines, dashboards, and reports. Requires 10+ years of experience in data analytics, proficiency in Python, SQL, and experience with complex technical data. Must have a genuine interest in defense and security applications.

The Principal Sales Engineer provides technical expertise and pre-sales support, positioning N-able technology through consultations, presentations, and product demonstrations. They act as a trusted advisor, understanding customer challenges and proposing solutions. This role involves building complex proof-of-concept solutions, customizing prospect environments, and assisting sales reps in offering product solutions. The Principal Sales Engineer also performs advanced troubleshooting, identifies product improvement areas, and collaborates with product managers.

IT Security Manager responsible for establishing, operating, and developing the ISMS (ISO 27001, TISAX). Defines and implements security policies, conducts risk analyses, manages incident response, and plans audits. Requires a degree in computer science, IT security, or a related field and several years of experience in IT/information security.

Research assistant/doctoral candidate to develop HTS magnet systems for the FAIR facility. Responsibilities include electromagnetic design, construction, testing, and documentation. Requires a university degree in physics or applied physics and advanced knowledge in mechanical engineering, cryogenics, electrical engineering, or related fields. Experience with superconducting magnet technology is advantageous.

This 24-month Trainee Talent Academy Program offers three rotations, challenging projects, and network building. Successful candidates will have a completed degree and initial practical experience. Strong German and English language skills are required.

Deliver groceries to customers efficiently by e-bike or e-scooter. Maintain a high level of customer service and consistently meet or exceed delivery targets. Earn at least €13.90 per hour plus tips. Must be at least 18 years old, have a work permit in Germany, and speak English or German.

Service Club seeks a Senior Sales Executive to lead revenue growth in the German market. You will own the full sales cycle, from prospecting and discovery to closing deals. Experience in B2B SaaS sales, specifically within logistics, supply chain, or fleet management, is required.

This part-time position is responsible for loading, unloading, shipping, receiving, scanning, sorting, and stocking packages. May utilize heavy machinery. Must be able to lift up to 70 lbs.

Define and own end-to-end solution architecture, turning business needs into technical blueprints. Ensure consistency, scalability, and sustainability of solutions across business lines. Lead the design of cloud-native, API-driven, microservices-based solutions.

The Director Medical Affairs Strategic Markets EMEA – Electrophysiology (m/f/d) will oversee the Medical Scientific Liaison (MSL) team supporting the G5 markets (Germany, France, UK, Italy, and Spain). This role provides medical and scientific leadership expertise in Electrophysiology and the management of patients in related clinical disciplines. The Director will report to the Senior Director, Medical Affairs – Electrophysiology and work closely with cross-functional teams to develop strategy and achieve business objectives.

Lead the legal function of a growing international technology company. Provide legal, commercial, and strategic advice to the executive team and Board. Manage complex transactions, agreements, and risk. Develop legal processes and lead a mid-sized legal team. German-qualified lawyer with significant in-house or private practice experience required.

Develop and manage software products for intralogistics. Translate requirements into user stories, prioritize them, and ensure implementation. Collaborate with stakeholders, customers, and development teams.

Designs and develops high-end C++ components for medical desktop applications, focusing on performance, stability, and scalability. Architects, implements, and reviews complex multithreading and parallelization concepts. Analyzes, refactors, and optimizes existing codebases, identifying bottlenecks and improving performance.

Senior Kernel & Hypervisor Engineer will build the EC2 Nitro Hypervisor for AWS, developing virtualization components and automating infrastructure flows. Responsibilities include designing, testing, and deploying solutions across the virtualization software stack, driving operational excellence, and influencing the technological roadmap. Experience designing or architecting new and existing systems, full software development life cycle, and writing clean, optimized, and scalable code using C or Rust is required.

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.

Leading €billion international retail fashion group seeks a strategic CFO to drive financial transformation, reporting, and expansion. Responsibilities include leading financial functions, overseeing group consolidation and performance management, and partnering on M&A strategy. Requires 15+ years of senior finance leadership experience in FMCG, retail, or consumer goods, with proven success in M&A, SAP implementation, and financial transformation. Strong international exposure and fluency in English are essential.

Lead the European organization for IEP Technologies, a global leader in safety solutions. Shape the future of industrial safety across Europe, with a focus on the DACH region. Drive business performance, foster cross-border collaboration, and ensure sustainable growth.

Supports the CFO with strategic, conceptual, and project-related topics, ensuring efficient decision-making processes. Prepares evaluations, presentations, and documents for executive-level review. Manages board and committee meetings and represents the CFO in internal and external meetings. Actively participates in cross-functional special projects.

Transaction and Valuation Manager (f/m/d) will lead valuation workstreams, prepare performance analysis, and model financial scenarios for E.ON Group decisions.