53 mainframe germany English-speaking jobs in Cologne

As a Mystery Guest, you'll experience a hotel stay, observing service quality and staff professionalism. You'll discreetly assess check-in, bar service, dining, room service, and public spaces. Capture photos and submit a detailed report with receipts for reimbursement.

Phagestack, a biotech startup, seeks a BTA, CTA, or Biologielaborant:in to perform microbiology and molecular biology lab work. Responsibilities include bacterial cultivation, phage isolation, and applying molecular biology techniques. Must have hands-on experience in sterile lab environments and a structured work style. Fluent in German or English required.

Guest Arrival Experts provide a memorable experience for guests during arrival and departure. They process operational needs, address guest requests, and share local area information.

Territory Sales Manager for Lonza's Capsule & Health Ingredients business unit. Responsible for strategic Eastern European accounts, identifying business opportunities, and growing market share. Requires a Bachelor's degree, proven sales track record in pharmaceuticals, and familiarity with CRM tools.

Application Engineer providing technical support and solutions for industrial equipment. Collaborates with customers, distributors, and internal teams. Requires engineering background, CAD experience, and business-level English.

Prepares and cooks food according to recipes, quality standards, and presentation standards. Maintains food logs and ensures the quality of food items. Communicates with the Chef and Food & Beverage service staff. Assists with employee hiring, training, and scheduling.

Provide private online English lessons to students. Must have a good knowledge of English and a completed higher education degree. Flexible timetable and remote work available. Compensation is between 20 and 35 EUR/hour.

Warehouse Employee / Warehouse Clerk will receive, process, and store incoming stock. Tasks include picking, packing, and shipping orders, performing inventory controls, and operating warehouse equipment. Requires a high school diploma, basic computer skills, and the ability to lift up to 50 pounds.

Working student sought for warehouse operations. Assist with receiving, picking, packing, shipping, and inventory management. Must be a team player, physically fit, and reliable.

Doctoral Researcher (Prae-Doc) to join the FWF ASTRA project RE-SECURE – Remaking Security: Technopolitics in the Global East. Develop a dissertation project within the framework of RE-SECURE and contribute to collaborative research. Responsibilities include conducting qualitative empirical research, contributing to comparative and conceptual work, and publishing research results.

This postdoctoral position focuses on the design and synthesis of functional molecular architectures for applications in optoelectronics, energy conversion, and light-responsive technologies. The successful candidate will develop new synthetic methodologies for polycyclic aromatic hydrocarbons and heteroatom-doped graphenoid systems.

EIT Water seeks its inaugural Chief Executive Officer to lead the organization through its start-up phase and long-term growth. The CEO will be responsible for strategic leadership, operational excellence, financial sustainability, and stakeholder engagement, ensuring measurable impact aligned with the European Institute of Innovation and Technology (EIT) and EU policy objectives.

Electrical Engineer (m/f/d) needed for temporary employment at the German Aerospace Center (DLR) in Cologne-Porz. Responsibilities include plant operation & maintenance, fault and repair management, engineering & optimization, project coordination & interface, and technical documentation. Requires a Bachelor's/Diploma in electrical or energy engineering or a master craftsman/technician qualification with 5+ years of experience in high and low voltage systems.