ruby English-speaking jobs in Düsseldorf

Senior Market Access Trader / Senior Sales Trader needed for pricing customer inquiries (electricity, gas, coal, CO2) in Europe. Requires several years of energy trading experience, customer management, and portfolio management.

Lead and develop the accounting team, stabilize existing structures, and build scalable financial processes. Ensure accurate and timely financial reporting and compliance with HGB. Analyze and optimize accounting processes, drive standardization and automation. Collaborate with internal and external stakeholders, providing financial insights and ensuring transparency.

The Max Planck Institute of Biochemistry seeks a motivated Master's student to investigate metabolite production and signaling during monocyte to macrophage differentiation and recruitment. The successful candidate will learn and perform immunology and molecular biology techniques, including cell culture, flow cytometry, and targeted metabolomic analysis.

This role combines strategic HR Business Partner responsibilities with operational HR tasks. You will act as a trusted advisor to senior leadership, supporting a high-performance culture and ensuring smooth execution of core HR processes.

The German Pension Insurance Rhineland seeks a System Administrator for Document Production to support the conception, development, and production of print campaigns. Responsibilities include preparing form letters, designing print products, ensuring compliance with corporate design guidelines, and managing software solutions for document monitoring.

As a Cyber & Network Engineer, you will ensure and advance cybersecurity standards across production and security networks in the DACH Region, Benelux, and The Netherlands. Responsibilities include conducting cybersecurity surveys, implementing regulatory requirements, managing projects, and integrating new technologies.

Lead and deliver incident response engagements for clients, managing investigations, containment, and remediation. Provide expert guidance and recommendations to enhance security posture.

TÜV Rheinland Ibérica seeks a PHP Full-Stack Developer with 3+ years of experience to build and maintain websites. Responsibilities include developing custom software solutions, modifying existing software, and ensuring solutions meet security, quality, and maintainability standards. Must be fluent in English, PHP, Git/GitHub, SQL, and JDBC.

This role is responsible for building and embedding robust transfer pricing governance for the Agricultural Solutions business. The ICTP Governance Specialist will maintain the intercompany transfer pricing framework, support the selection and management of transfer pricing IT systems, and monitor ICTP results. The position requires a strong understanding of transfer pricing concepts, documentation requirements, and financial process flows.

L.E.K. Consulting seeks Associates to conduct market, competitor, and customer research, perform financial analyses, and collaborate on developing client recommendations. Successful candidates will have strong analytical and communication skills in German and English.

Leads the implementation of an AI-enabled Intelligent Operations Platform (IOP) for Pharma and Chemical Manufacturing customers. Drives value-creating PoCs, stable deployments, and user adoption. Builds and develops consulting and implementation teams to deliver high-impact solutions.

Working student in Electrical Engineering supporting the design of PV systems, including component dimensioning and AutoCAD implementation. Must be enrolled full-time in a Berlin or Brandenburg university, studying Electrical Engineering or a related field.

Lead procurement and supplier management for the Corrugated Boxes category, ensuring procurement target achievement and cost optimization. Collaborate with stakeholders to define requirements, manage supplier relationships, and execute strategic sourcing projects.

Drive Real World Evidence (RWE) strategy and execution across the drug development lifecycle. Design and oversee impactful RWE studies, contributing to critical development and regulatory decisions.

The Asset Optimization Manager will manage the end-to-end lifecycle of contracted assets, from evaluation and pricing to execution and performance monitoring. Responsibilities include contributing to desk PnL through trading strategies, working with the Origination team on business development, and developing hedging strategies. The role requires a proven track record in energy trading, asset optimization, or structured energy products, a detailed understanding of European energy markets, and strong quantitative and analytical skills.

As a Field Application Engineer, you will be the technical point of contact for customers in industrial automation, robotics, and medical devices. You will provide technical expertise, support sales efforts, and manage customer relationships.

The EU Sustainability & Compliance Project Manager will own Anker Innovations' pan-European sustainability and regulatory compliance strategy for Amazon operations. Responsibilities include managing certifications, ensuring compliance with EU Extended Producer Responsibility regulations, and embedding sustainability principles into product launches and supply chain processes.

Hardware Engineer needed for design, development, and characterization of new system elements for semiconductor testing platform. Requires a university degree in Mechatronics or a comparable technical discipline with experience in multi-KW power supply HW and thermal management.

Co-founder (Education & Pedagogy) needed for a screen-free AI tutor. Must be a recent graduate (within 5 years) from a recognized German university with a degree in Education Sciences, Lehramt, Educational Psychology, Learning Sciences, or a related field. Deep understanding of the German school system and experience navigating its regulatory environment is required. This role requires a native German speaker who can represent BluePen AI in education forums and advocate for the product within the German education system.

Scientific Research Assistant (Doctoral) to develop, evaluate, and integrate Neurosymbolic AI systems for scientific workflows. Tasks include designing AI architectures, integrating LLMs, and developing data-driven models. Requires a Master's degree in Computer Science, Data Science, AI, Mathematics, or a related field.