freelance English-speaking jobs in Bielefeld

Serves as a Postal Operations Assistant in designated postal facilities of IMCOM-Europe. Processes incoming and outgoing mail, operates customer service windows, and drives a step side van. Responsible for managing a flexible stamp and monetary stock, selling postage, and processing mail for dispatch. Handles, screens, and processes incoming and outgoing mail, including delivery, sorting, weighing, and metering. Maintains accountability and security of official mail accounts and USPS postage stamps. Collects and delivers mail and publications within buildings and on public roads. Operates a customer service window for package delivery and other oversized articles. Performs other duties as assigned. Requires a German driver's license class B and English Language Proficiency level C2.

Production employee needed for a fast-growing deep-tech company. Assemble core components and cryostats, following production documentation. Provide support to Procurement and Testing & Quality Control teams.

Strengthen and manage Mollie's agency portfolio, acquiring new digital agencies and lead-generating partners. Build relationships to drive merchant acquisition and growth. Collaborate across teams to execute integrated go-to-market initiatives.

Manage and grow customer relationships in the Automotive Fluids Independent Aftermarket, focusing on coolant/antifreeze and brake fluid products. Negotiate contracts and steer technical and commercial projects with customers and internal teams.

Porsche Consulting seeks a (Senior) Consultant to conduct strategic projects for aerospace OEMs and suppliers. Focus areas include product lifecycle optimization, production efficiency, and digitalization.

Lead all tax activities in the DACH region, ensuring compliance, managing tax risks, and serving as a strategic finance partner.

Validation Engineer will build and operate cloud-based validation environments for a multi-agent AI system. Responsibilities include designing AI-assisted exploration strategies, developing coverage models and metrics, establishing validation methodologies, and building observability tooling.

Investment Banking Vice President to support senior bankers in executing complex deals, driving revenue growth, and building relationships with DAX-listed corporates, mid-market firms, and institutional investors across Germany and the EU.

Develop and maintain long-term relationships with key clients to achieve business objectives. Drive revenue growth and profitability through strategic account development and value-based selling.

Experienced Executive Assistant to support a founder in a fast-paced AI infrastructure company. Responsibilities include calendar and travel management, problem-solving, process improvement, and project coordination. Requires strong organizational skills, experience supporting senior leadership in a startup environment, and fluency in English and German.

This part-time evening sorting position involves loading, unloading, shipping, receiving, scanning, sorting, and stocking packages. May utilize heavy machinery. Requires ability to lift up to 70 lbs., read and memorize postal codes, and work flexible hours. Warehouse experience is preferred.

As a Quant & Engineering Intern, you will develop quantitative analyses, models, and prototypes to solve real trading problems for clients in the energy sector. You will use AI tools and Python for data science and quantitative modeling, and collaborate with traders and the CTO.

Provide technical leadership for MES workflows, integrations, and shop-floor systems. Collaborate with architects, business teams, and vendors to ensure system reliability. Guide the team on development, AMS support, and troubleshooting.

Lead and optimize performance-driven campaigns across TV, OOH, Radio, and digital channels for Autohero and Wirkaufendeinauto.de. Analyze campaign performance, manage budgets, and build business cases for brand initiatives.

Cloud Solution Architect Infrastructure MECM (SCCM)/Intune will design, deploy, review, and assess infrastructure health. Troubleshoot issues, tune for performance, and assist with reporting. Expert knowledge of SCCM, Intune, and related technologies is required.

As an Application Engineer for the V93000 SoC ATE system, you will support customers in developing, optimizing, and troubleshooting semiconductor test programs while integrating AI/LLM capabilities into our software ecosystem. This role combines semiconductor test expertise with AI engineering, focusing on test methodologies, customer projects, and LLM-driven tools. You will bridge ATE application engineering and AI-assisted engineering, contributing to smart tooling that improves test quality and automation.

Manage a structured sales approach for designated accounts, implement a commercial sales strategy, and provide technical support for plywood applications.

Training Coordinator needed to support NIIT's customer in Frankfurt. This role involves analyzing training needs, coordinating session delivery, and collaborating with the customer's learning delivery team. Requires 2-4 years of experience in learning delivery management, fluency in German and English, and proficiency in MS Office.

Field Sales Engineer (m/f/d) for North-East Germany. Manage a focused selection of customers in aerospace, automotive, and other industries. Provide technical expertise in data acquisition, software, sensors, and services. Requires a Bachelor's or Master's degree in engineering, German as a mother language, and high-level English.

Jitterbit seeks a driven Inside Sales Representative to cultivate new business opportunities and close deals within the DACH region. The ideal candidate will have a proven track record of B2B technology sales success and a passion for exceeding expectations.