ruby English-speaking jobs in Cologne

Finance / Back Office Staff needed for Japanese HVAC company in Stuttgart. Responsibilities include accounting, finance, HR, and administrative tasks. Requires proficiency in English and German, IFRS, EU GAAP, and experience with Oracle Financials or SAP.

Experienced AI marketing practitioner and educator needed to develop and deliver workshops on applying AI to marketing workflows. Must have hands-on experience with various LLM ecosystems and a deep understanding of generative AI workflows.

Develop and maintain financial models, conduct business performance and cash flow analysis, and prepare reporting. Support planning cycles and drive process improvement. Requires a finance degree, 3+ years of experience in financial modeling and data analysis, and proficiency in Power BI.

The Leipzig Cohorts and Trial(ist)s (LeiCoT) program seeks a recognized medical specialist with a strong research background in metabolism, brain/heart, or cancer. The program offers a six-year, fixed-term position with 50% research and 50% clinical work.

Leads the global Market Intelligence strategy, builds and scales the Market Intelligence function, and conducts in-depth market analysis. Identifies growth opportunities, analyzes market trends, and translates insights into actionable recommendations.

The Technology Domain Leader – Software Asset Management defines and executes the enterprise-wide strategy for software asset management, licensing compliance, and optimization. This role ensures the organization maximizes the value of its software investments, minimizes compliance risks, and embeds SAM practices into core business and technology operations.

German-speaking Customer Support Specialist needed to provide product guidance, order support, and after-sales service to customers via email, chat, and phone. Must have native or near-native German and B2 English.

The Head of Marketing Germany develops and implements the marketing strategy for the German market, leading the local marketing team and ensuring brand consistency.

This 18-month trainee program offers five project assignments, starting with Finance & Data Science. Trainees can choose subsequent assignments across the entire Group. The program includes international rotations, "Magenta Friday" events, and "Service Days" to gain operational insights.

Leads deal teams for onshore wind, PV, and battery storage transactions across Europe, driving the entire process from sourcing to closing. Coordinates due diligence, develops financial models, negotiates agreements, and manages project financing and PPAs.

Lead the design and implementation of a new, global distribution automation delivery model for Hitachi Energy. Own the P&L and oversee end-to-end delivery structure, driving customer-centricity, agility, and operational excellence. Collaborate with Sales, Operations, SCM, and Product Groups to ensure seamless execution.

Senior Full Stack Developer needed for remote role. Fluent Dutch or French required, with understanding of the other. Experience with Typescript, Python, AWS, and Angular is essential. Must have a strong understanding of TDD and passion for continuous improvement. Experience with Aurora, DynamoDB, Athena, Apache Parquet, AirFlow, ETL, and big data processing is a plus.

The Assistant Chief of Fire Prevention directs the daily execution of a US Army installation's fire safety program. Responsibilities include program administration, code enforcement and inspection, public education and training, incident investigation, and leadership & emergency command.

Senior Backend Engineer (C#/.Net) will design, develop, test, and ship robust software applications, APIs, and workflows. Responsibilities include participating in technical architecture design, attending scrum ceremonies, and analyzing business requirements. Requires 5+ years of experience with C#, .NET framework, cloud-based applications, microservices, and RESTful APIs. Experience with SQL Server, ORMs, and messaging platforms is preferred.

This role monitors and reports on cabin-related Outstanding Work (OSW) status. The individual analyzes, prioritizes, and coordinates open items, ensuring accurate status tracking and documentation. They identify blockers, escalate deviations, and develop action plans. The role requires a degree in a relevant engineering field or a state-certified technician qualification with aerospace experience.

Drive service sales and identify new opportunities within process analysis technology for existing and prospective customers in Germany and Switzerland. Analyze customer needs, provide technical consulting, and develop proposals for service contracts and upgrades.

Area Sales Manager (m/f/d) for Latin America and Brazil. Supports dealers and sales companies in sales, product training, and application consulting. Requires proficiency in English and Spanish, with Portuguese beneficial.

Internship or thesis focusing on wave optical propagation algorithms for micro-optical structures. Students will investigate and compare algorithms for applications like optical waveguides and printed micro-optic components.

Freelance lecturer to teach computer architecture and operating systems, including hardware design, assembly programming, memory management, and concurrency. Requires a computer science or related degree, practical experience, and English language skills at C1 level.

Working Student / Intern supports marketing and sales efforts for a Berlin-based AI startup focused on automating legacy software. Tasks include content creation, outreach campaigns, and sales material development.