ruby English-speaking jobs in Düsseldorf

Develop proof-of-concepts for new power tool products and services, leveraging expertise in mechatronics, sensing, control, algorithms, actuators, and machine learning. Contribute to the next generation of Hilti's tool portfolio through collaboration with business units and academia.

Senior AI Engineer with 5+ years of software development experience and 3+ years in implementing and industrializing AI solutions. Expertise in Generative AI, Computer Vision, Natural Language Processing, MLOps, or platform development. Experience with data engineering, cloud infrastructure, and GitOps practices.

Working Student - Brand & Content Marketing Operations will support campaign management and social media for a major Audible x Pottermore launch targeting German audiences. Responsibilities include content creation, UGC curation, and social media growth strategy. Must be a fluent German speaker with strong organizational and creative skills.

AI Specialist to design, build, and deploy AI-powered solutions for content creation and management across multiple channels using Microsoft Azure AI services.

This full/part-time role at TUI BLUE Sylt, Germany, starting 01.03.2026, requires a German speaker with certifications in Yoga, Functional Training, and Personal Training. You will lead group fitness sessions, wellbeing activities, and daytime sports and entertainment for guests.

Accounts Payable Accountant responsible for invoice processing, vendor master data, VAT transactions, payment runs, and monthly closing entries. Requires commercial training, financial accounting experience, and proficiency in SAP and MS Office.

Working Student in Sales & Marketing, Project Management. University studies in Business Administration, Economics, Statistics, Controlling, or related field. Alternatively, IT background with interest in analytical work. Strong analytical skills, data processing experience, and advanced Excel skills required.

Develop software components for mobile robots in dynamic environments. Integrate components and implement innovative applications. Test and evaluate approaches in a test warehouse and at customer sites.

Develop and run system simulations for data center cooling solutions. Translate simulation insights into design improvements and drive model-based development. Collaborate across teams to connect simulation specialists with data center experts.

The HR Administrator will prepare and execute monthly payroll, manage employment contracts, and coordinate with external agencies. They will also prepare reports, act as a contact for stakeholders, and support the recording and correction of attendance times.

Marketplace Coordinator to manage and develop national and European online marketplaces. Responsibilities include optimizing product listings, managing marketplace activities, monitoring KPIs, and collaborating with marketing, sales, and product management. Requires a degree in E-Commerce or Business Administration and experience in marketplace management.

Full-Stack Web Developer will maintain and improve the citizenscience.eu platform using Python and Django. Responsibilities include developing features, managing infrastructure, ensuring secure deployment, and collaborating with the team.

Lead Engineer Industrial BATT/PV (m/f/d) will link cell technology, production equipment, and facility design to create scalable, safe, and high-performance manufacturing. This role requires a Master's degree in a related field, hands-on experience with lithium-ion cell manufacturing equipment, and proven experience in gigafactory planning.

Senior Project Manager to lead complex construction projects in the venue, theatre, and leisure sectors. Experience with FIDIC and/or VOB contract frameworks and fluency in German required.

Finance Assistant will support the Director of Finance in managing the day-to-day operations of Accounting. Responsibilities include month-end closing, revenue management, accounts payable, and supporting monthly reporting.

As a Senior Account Executive, you will drive revenue growth in the DACH region by advocating Freshworks' SaaS products to mid-market clients. You will define sales action plans, manage your pipeline, and collaborate with marketing and business development representatives.

This Senior Procurement Engineer role focuses on managing procurement for the Serbia Base and developing global and European procurement resources. Responsibilities include sourcing, negotiating, and finalizing auto chassis components, developing outsourcing supplier resources, and ensuring supply chain stability and cost optimization. The position requires 10+ years of procurement experience, expertise in auto chassis components, and proficiency in European procurement processes.

This Key Account Manager role focuses on strategic partnerships for FTTX rollout across Germany. The successful candidate will manage relationships with municipalities, authorities, and partners, driving projects forward and coordinating communication.

AeroLogic, a modern cargo airline, seeks an Engineer Aircraft Reliability & Maintenance Program to monitor fleet reliability, coordinate actions with system engineers, and manage aircraft maintenance programs.

Business Development Manager will focus on new business revenue growth through prospecting, qualifying, and closing deals. Responsibilities include preparing tenders, analyzing client needs, and ensuring consistent achievement of sales targets. Requires 5+ years of freight industry experience, excellent client orientation, negotiation skills, and communication skills.