ruby English-speaking jobs in Düsseldorf

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.

SQL Service GmbH seeks a Cloud Engineer to design, develop, and implement Microsoft Azure architectures. Responsibilities include optimizing cloud environments, providing support for cloud service operations, and contributing to DevOps CI/CD processes.

Senior Kinaxis Consultant required to support a complex end customer project in the hi-tech/advanced manufacturing space. The successful consultant will work with French-speaking business stakeholders to understand Kinaxis pain points and identify solutions to improve value from the platform. Strong Kinaxis experience, fluent French and English communication skills, and business-facing consulting experience are required.

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

Experienced Corporate Lawyer (m/f/d) with a focus on transactions and M&A sought to manage domestic and cross-border deals, lead M&A execution and integration, and provide legal advice to stakeholders.

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.

As an Outbound Account Executive, you will own the full sales cycle for established small merchants (upmarket SMBs) with monthly transaction volumes above €15,000. You will proactively reach out to prospects via cold calls, emails, and social channels, manage your sales territory, and build a strong sales pipeline. You will lead discovery meetings, position payment and POS solutions, and collaborate with internal teams.

Operate robotic platforms, monitor activities, and execute tasks according to procedures. Verify robot behavior, identify issues, and maintain operational records. Assist with robot setup, testing, and process improvement.

Front Office Shiftleader responsible for ensuring smooth guest check-in and administrative processes. Requires hotel business training, experience, fluency in English, and the ability to inspire both guests and staff.

Amazon seeks a competition lawyer to drive EU and German regulatory matters, advise on competition-related issues, and shape the company's long-term strategy.

Manage IT systems, develop processes, and ensure smooth operation of IT infrastructure. Responsibilities include maintaining ERP systems, supporting error analysis and updates, and assisting with hardware and software issues.

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 systematic study of X-ray optics contamination, applying cleanroom technologies to recover them.

Quality Engineer responsible for monitoring, analyzing, and improving product and process quality. Conducts audits, inspections, and root cause analyses. Develops and maintains quality documentation and ensures compliance with standards. Collaborates with suppliers to manage quality deviations and complaints. Requires a degree in quality management, electrical or mechanical engineering, and experience in a manufacturing environment.

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.

As a Sales Stylist, you will provide exceptional customer service, share product knowledge, and support store operations. You will create a welcoming shopping experience and work with your team to achieve sales goals.

Drives strategic sales into enterprise accounts, prospecting, qualifying, selling, and closing new business. Focus on new business development with a split of 70% new logo business and 30% account development. Manages the sales process, including lead generation, qualification, evaluation, close, and account care. Requires 7+ years of quota-carrying sales experience in software products and services.

Develop thermodynamic models and algorithms for heat exchangers. Determine heat exchanger characteristics based on thermo-hydraulic measurements. Support development projects with expertise in thermodynamics.

Spend your summer as a Rental Sales Agent at Frankfurt Airport. You will be the first point of contact for customers, providing sales and service. You will handle rental agreements and inquiries, ensuring a positive customer experience.

Senior Commercial Manager leads the strategic and operational development of a key pan-European omnichannel account, driving revenue and profit growth. Manages commercial performance, develops activation strategies, and optimizes omnichannel performance across touchpoints. Collaborates with international teams, builds strategic relationships, and identifies growth opportunities. Requires a degree in business administration, economics, or a comparable qualification, and experience in Key Account Management within the consumer goods sector. Fluency in German and English is required.

This ERC-funded project pioneers the inverse design of time-varying metamaterials. The PhD position focuses on mathematical modeling, numerical analysis, and algorithm development for time-dependent electromagnetic systems. Responsibilities include designing scalable algorithms for 4D inverse design, implementing time-domain solvers, and developing gradient-based optimization strategies.