freelance English-speaking jobs in Bielefeld

The Strothoff International School is a bilingual, international school. In our pedagogical concept, we follow both the Hessian education plan and the international IB curriculum. On our family-friendly and modern campus in Dreieich (near Frankfurt), we offer around 400 children

School counsellors provide support to students, families, and staff at a private international school. Responsibilities include delivering developmentally appropriate activities, supporting student wellbeing, and collaborating with school personnel to address student needs. Counsellors also provide short-term support, share resources, and assist with crisis intervention.

As a Martech Specialist Mobile Apps, you will troubleshoot Mobile Measurement Partners (MMPs) and ensure seamless connections with advertising networks for accurate tracking and attribution. You will manage client data feeds, create data visualizations, and collaborate with developers to implement marketing tools and integrations.

Manage and optimize paid media campaigns across search, social, and display for brands like LEGOLAND and Peppa Pig. Drive traffic, revenue, and ROI through data-driven decision-making and performance analysis. Collaborate with marketing, eCommerce, and agency partners to ensure campaign alignment and execution.

Senior Software Engineer to ensure fast, secure, and reliable releases for the Global Monitoring Service (GMS) application. Responsibilities include managing container-based application lifecycle, CI/CD pipelines, and deployments on customer-isolated Kubernetes clusters. Requires 10+ years of software engineering experience with a focus on infrastructure or DevOps, experience with Kubernetes, and a track record of owning and optimizing CI/CD pipelines.

Payment & Fraud Analyst will handle chargebacks, refunds, and internal tickets for B2C eCommerce shops. The role involves monitoring fraud trends, supporting new eCommerce developments, and reconciling sales and payment data. Requires a solid commercial or financial background, experience in eCommerce and/or Finance, and strong analytical and communication skills.

As a Working Student (f/m/d) on the CVG Communications Team in Walldorf, you will conduct research, prepare content for presentations and LinkedIn, and provide administrative support.

PubMatic seeks a Sales Director for its Advertiser Solutions team in Hamburg. This role focuses on driving new client acquisition, building relationships with agencies, brands, and DSPs, and representing PubMatic at industry events.

As the Key Account Manager PBV, you will drive business development and oversee strategic initiatives to strengthen Kia's commercial vehicle sales in Europe. You will build and maintain relationships with corporate customers, business partners, and serve as the primary contact for Market KAMs. You will lead the overall Fleet Tender Process and support Markets in managing large customer accounts.

Account Manager needed for end-to-end deal management in German B2B finance. Manage full sales and credit cycle, including prospecting, credit analysis, and deal structuring. Must have experience in large corp invoice financing or similar banking environment. Fluency in German and English required.

Manage major airfreight tenders and RFQs, from request to submission. Create competitive proposals, collaborate with internal teams, and ensure customer requirements are met. Monitor market trends, optimize solutions, and deliver high-quality documentation.

Develop leading-edge photomask metrology systems. Translate customer needs into optimized solutions. Analyze system requirements, define KPIs, and perform characterization. Collaborate with cross-functional teams.

Software Engineer (m/f/d) for Electronic Warfare Ground Support Systems. Develops and maintains systems for A400M, Tornado, Eurofighter, and future aircraft. Responsibilities include software architecture definition, user workflow analysis, and mission data preparation solutions using Java and Eclipse. Requires a Computer Science degree, professional experience in Computer Science and Information Systems, and Electronic Warfare knowledge. Fluent English required, German is a plus.

Drives the development and growth of strategic partnerships with BioPharma customers. Leads partnership strategy, builds relationships, and supports transactions. Manages key BioPharma accounts, ensuring customer satisfaction and partnership growth.

Leads global corporate strategy projects, defining and implementing company strategy. Drives strategic planning, identifies growth opportunities, and analyzes market trends. Collaborates with senior leadership and stakeholders to execute strategic initiatives.

Lead projects to develop and deploy astronomical instrumentation systems, including sub-systems. Manage project budgets, schedules, and resources. Collaborate with project scientists, engineers, and external partners.

Develop cutting-edge Quality Agents leveraging Workflow and Agentic solutions (e.g., Microsoft Copilot Studio, Google Gemini, n8n, Power Automate) for steering and braking systems.

Product Manager responsible for end-to-end product category management, including strategy development, market analysis, performance tracking, and cross-functional collaboration.

As an Asset Management Specialist, you will contribute to private debt and private equity investment structures, provide accounting analysis for alternative asset investments, and support private asset management throughout the investment lifecycle.

Software Project Manager will lead software development for new energy storage technology. Responsibilities include planning software releases, ensuring team effectiveness, and tracking release metrics.