javascript English-speaking jobs in Hagen

Freelance English writers train AI models by crafting text that teaches AI reasoning, logic, and clarity. Contributors create original, fact-checked responses, collaborate with Quality Assurance Specialists, and adhere to style and quality standards.

Manage and grow customer relationships in the Automotive Fluids Independent Aftermarket, focusing on coolant/antifreeze and brake fluid products. Negotiate contracts, steer technical and commercial projects, and acquire new business opportunities.

Web Development Intern/Trainee provides hands-on experience on real projects. Assists with website development, focusing on usability, responsiveness, and SEO. Supports wireframing, layout design, and front-end/back-end tasks.

Provides consumer support, handles data access requests, and assists the customer service team with email inquiries.

Shape a new global Sales Development team at Sportradar, a leader in sports technology. Lead outbound campaigns, qualify opportunities, and build relationships with decision-makers in sports, media, and betting.

The Import Specialist processes import shipments and documentation for assigned accounts. Responsibilities include reviewing documentation, coordinating sea freight and customs release, and providing client service updates.

Sales Assistant provides customer service, sales advice, and order processing for a luxury children's fashion brand. Requires fluency in German and English, proven sales skills, and retail experience.

Project Engineer to join a growing global automotive company. Develop and optimize manufacturing processes, collaborate with internal teams, and report to the Engineering Manager. Requires a relevant engineering degree, broad engineering knowledge, automotive industry experience, and fluency in English and German.

Lead a team of 6 in growing Opinary's publisher portfolio by onboarding new and expanding existing partnerships. Develop business opportunities for conversational formats and expand publisher usage of first-party data.

Administration & Accounting Specialist to oversee European entity accounting operations, manage financial closing processes, and ensure compliance with regulations.

Develop and execute B2B and B2C lead generation and automation strategies. Build and refine AI agents for tasks like asset creation, campaign management, and reporting. Ensure lead generation translates into revenue by collaborating with the Operations team.

CMS seeks an experienced Digital Marketing Manager to lead content strategy across digital channels, focusing on performance, consistency, and user experience. The role involves setting editorial standards, overseeing the CMS website, and driving continuous performance improvements.

Senior Backend Engineer (C#/.Net) will design, develop, test, and ship robust software applications, APIs, and workflows. Experience with C#, .NET framework, cloud-based applications, microservices, and RESTful APIs is required. Familiarity with Azure, SQL Server, and messaging platforms is a plus.

Responsible for the strategic development and sustainable orientation of the Machines & Equipment business field, including special machine construction and abrasive production. Develops and implements growth strategies, manages budgets, and leads international segment managers. Requires a university degree, international leadership experience, and strong analytical and communication skills.

Working Student in Underwriting Integrity & Solution EMEA supports global underwriting-related strategic projects and ensures solid governance processes are in place for Allianz Commercial. Responsibilities include supporting the team in driving continuous improvement of underwriting governance processes, assisting with operational tasks, and collaborating with Lines of Business.

Experienced .NET Developer sought to enhance Luware's Nimbus call center solution. Responsibilities include designing, developing, and deploying cloud services, collaborating with stakeholders, and mentoring junior engineers. Must have 5+ years of backend service development experience, experience with AI technologies like OpenAI and Copilot, and a strong understanding of software engineering best practices.

Growth Lead will build out organic growth playbooks for portfolio companies, enabling €mm annual growth. Requires native-level German, proven marketing/sales expertise, and strong interpersonal skills.

Product Design Lead will own all aspects of product design and UX for an AI-driven workflow platform. Responsibilities include user research, interface design, and building a scalable design system. Requires 3+ years of product/UX design experience and a strong portfolio.

The Compliance Manager Aesthetics DACH leads ethics and compliance programs across Germany, Switzerland, and Austria. This role provides guidance on complex compliance issues, collaborates with business functions, and ensures compliance program effectiveness.

Research scientist will design and simulate nanomechanical resonators, operate laser-interferometric setups, and contribute to the NEST prototype development. Requires a doctorate in physics or related field, experience with experimental setups, programming, and laser optics, vacuum technology, cryogenics, and FEM simulations.