freelance English-speaking jobs in Bielefeld

Define system, data, and deployment architectures for AI solutions. Establish standards and patterns while architecting LLM/ML solutions with rigorous evaluation and safety. Design MLOps foundations for reproducibility and engineer for reliability, latency, cost efficiency, observability, and resilience.

Senior Full Stack Developer will design, implement, and maintain a big data platform. Responsibilities include feature development using Java, Spring Boot, and Vue.js, system architecture development, platform operation and optimization, and mentoring junior developers. Requires 5+ years of software development experience, strong Java skills, and experience with front-end frameworks, databases, microservices, and event streaming platforms.

Quality Engineer Regulations will collaborate cross-functionally to ensure products meet legal requirements, Advantest standards, and customer expectations. Responsibilities include managing third-party certifications, influencing product design for safety and compliance, and developing product market access plans.

Drives new OEM business and accelerates growth of Custom Photonics Solutions across Europe. Develops markets, customers, and projects, qualifies customer requirements, and delivers tailored photonics solutions. Acts as Key Account Manager for strategic customers and collaborates with cross-functional teams.

As a Digital Resilience Governance / IT Governance Specialist, you will coordinate, govern, and manage reporting activities within IT Resilience Governance. You will support IT teams in executing IT resilience testing and monitor related KPIs.

Program / Project Manager (f/m/d) will manage one or two projects within a global program, owning timeline, budget, quality, and risk. Responsibilities include calculating project development and implementation risks, managing resources, building and managing project plans, and serving as a mentor to project members. Requires proficiency in SAP Activate Methodology, project management skills, and the ability to work independently and travel 50%.

Senior Account Executive to build and scale sales operations for a leading Autonomous Payout Operating System. Focus on closing enterprise deals ($20M to $1B+ in annual payout volume) with CFOs and treasury leads in fintech, payment infrastructure, or compliance SaaS.

German-speaking Google Ads Account Manager needed to develop digital advertising strategies, manage client relationships, and achieve targets.

Performance Marketing Manager will manage digital marketing channels, analyze customer journeys, and develop strategies to improve marketing efficiency. Requires a degree in a relevant field, 4+ years of Google Ads experience, and strong analytical skills.

Lead Developer & Architect to design and build user-friendly web applications using Vue, Node, and Laravel. Collaborate with the founding team on strategic decisions, lead development teams, and drive scalable architecture and technology standardization. Extensive experience with Vue, Node, and Laravel required. Proven experience in technical planning for large-scale applications and platforms. Familiarity with web protocols, documentation formats, and AI models.

Develop and maintain secure enterprise applications in high-security environments. Analyze requirements and translate them into robust technical solutions. Collaborate with an international team on mission-critical projects.

Provide technical support for EV chargers, energy storage systems, and related solutions. Assist front offices with product selection, configuration, and integration. Troubleshoot technical issues and collaborate with engineering and product teams. Develop and deliver technical training for internal teams.

Functional Analyst / Tester needed for two projects: Waterfall analysis/testing for CBPR+ and Agile analysis/testing for fund distribution and client UI. Requires 3-5 years of business and functional analysis experience, strong analytical skills, and knowledge of test lifecycles.

Customer Service Travel Coordinator provides travel planning assistance and exceptional customer service via phone, email, and online platforms.

Deliver groceries to customers efficiently by e-scooter or e-bike. Maintain a focus on delivery targets and exceed them. Earn at least €13.90 per hour plus tips.

This role involves driving sales targets, managing sales activities, building relationships with healthcare professionals, and providing technical and clinical support for neuromodulation products.

Intern to support the Corporate OHS team in developing a maturity self-assessment tool. Responsibilities include designing a user interface, developing a concept, and consolidating existing templates.

Manage and execute SAP RISE migration, leading internal and external project teams. Develop and steer technical migration strategy, ensuring adherence to timelines, budget, quality, and security standards.

Über uns As a Senior Engineer Optical Coating - Augmented Reality (m/w/d)* at SCHOTT, you will play a key role in shaping next‑generation Augmented Reality (AR) systems.

ChatSentry seeks German native speakers to engage in text-based conversations with users on various platforms. Responsibilities include active conversation management, adherence to communication guidelines, and building long-term interactions. Compensation is performance-based.