ruby English-speaking jobs in Düsseldorf

The Category Buyer Indirect Material will develop and implement sourcing and category strategies for indirect materials, services, MRO, and CAPEX. This role will identify and implement cost-saving potential and manage regional sourcing and savings projects. The Category Buyer will also execute negotiations, conduct market and supplier analyses, and manage supplier relationships.

Working student supports the Talent Search Team in active sourcing, application management, recruitment, university partnerships, and employer branding initiatives.

A high-growth infrastructure platform seeks a Chief Commercial Officer to define and execute its global revenue strategy. The CCO will drive revenue growth, market expansion, and customer engagement, leading sales, marketing, and customer success.

Freelance WordPress Web Developer needed to build a new one-page website. Must have strong frontend skills, experience with WordPress themes and plugins, and knowledge of HTML5, CSS3, and JavaScript.

The Chief Product and Technology Officer leads product strategy, portfolio management, and roadmap decisions for a DeFi ecosystem. This role defines product direction, ensures product quality, and guides technology choices to support product strategy and delivery goals.

Editorial Reviewer needed for international education projects. Must have a degree in Linguistics, Foreign Languages and Literatures or related field, Greek as first language, fluency in English, and proficiency in at least two of: Spanish, Portuguese, French, Russian, Polish. Experience in editing, proofreading, and managing multiple projects required.

Saarland University seeks a W2 Professor (W3 tenure track) in Quantum+AI: Artificial Intelligence in Quantum Physics and Technology. The successful candidate will have a strong research record in quantum AI and experience securing external funding. Responsibilities include teaching theoretical physics and contributing to research and teaching programs in Quantum Engineering, Data Science and Artificial Intelligence.

Architect the brand strategy for a pet technology product. Full-stack marketing responsibility including GTM strategy, brand positioning, growth, content, community, and partnerships. Proven track record scaling B2C products with 4+ years of experience, at least 2 in a startup environment.

Driven Sales Development Representative to build top-of-funnel, generate qualified leads, and execute outbound outreach. Fluent in German and English required. 1-2 years of experience in a similar role or Bachelor's/Master's degree.

As a Ground Segment Software IVV Engineer, you will be responsible for the Integration, Verification and Validation of software for Mission and Payload Management, including the integration of AI-engines. You will contribute to the definition of the IVV Plan and Reports, perform Software Design, Development and IVV tasks, and analyze data from validation tests.

Middle Distillates Trader needed for a well-established energy trading company. Manage and grow a physical trading book focused on NWE/ARA or Mediterranean markets. Trade across middle distillates (e.g., gasoil, jet, diesel) and build relationships with suppliers, end-users, and brokers. Minimum 3 years' experience trading middle distillates in Europe required.

Build and launch business tools end-to-end using AI-native tools. Own the full launch process, from concept to live URL, and iterate based on usage data. Must have a live portfolio demonstrating your ability to ship quickly.

Lead and develop global Medical Affairs Operations and Excellence, driving operational excellence, digital transformation, and efficient execution of medical activities. Manage a team, implement digital tools, and ensure compliance across global medical operations.

Research Associate (75% position) with opportunity to pursue a PhD in Innovation Leadership. Focus on international market expansion strategies, particularly in India and global markets.

This Global Buying Graduate role supports the production of fashion products from design to delivery. Responsibilities include managing orders, supplier communication, and negotiating production details. The successful candidate will travel to Asia, collaborate with international teams, and possess fluency in German and English.

Talent Sourcer to support EMEA hiring for go-to-market and sales roles. Hybrid role with 3 days per week in Berlin office. Responsibilities include proactive sourcing, talent mapping, initial candidate engagement, and stakeholder collaboration. Requires experience in sourcing or recruiting, proficiency in LinkedIn Recruiter and ATS, strong search techniques, and excellent communication skills.

Credit Research Specialist to conduct financial modeling, valuation, and credit risk analysis across sectors. Prepare research reports, market commentary, and present ideas to investors.

Senior Software Architect needed for PricingEngine modernization project. Upgrade Scala 2.12 to 3.3.7 LTS and Java 8 to 21 LTS, including architectural migration from Maven to SBT. Technical documentation and code restructuring required.

Test Engineer 4 will support panel equipment production, developing test procedures, resolving manufacturing floor test issues, and improving product quality. Responsibilities include collaborating with design engineering, conducting validation on test software and fixtures, and analyzing factory non-conformances.

Project Manager to lead hybrid project meetings, monitor progress, and prepare documentation. PMO responsibilities across proposals, development, production, and R&D. Degree in Business Administration, Business Informatics, Industrial Engineering, or comparable field. Project management experience or certification preferred.