freelance English-speaking jobs in Bielefeld

Electrical Lead to manage electrical site delivery on a large data center construction project. Responsibilities include electrical installation, subcontractor coordination, technical interfaces, quality control, and commissioning readiness.

Strategic advisor to senior Sales leadership, shaping commercial strategy through analytical rigor. Lead high-impact initiatives like Sales Compass and the Sales Operating System to drive revenue growth. Requires structured problem solving and execution.

Technical Project Manager for C&I Solar & BESS. Lead battery storage projects from contract award to commissioning, managing technical aspects, contractors, and grid connections. Requires electrical engineering background and fluent German.

Working student supports the development and implementation of quantitative tools for asset optimization in power markets. Tasks include implementing optimization approaches, developing trading dashboards, and refining forecasting models. Requires a Master's program in a quantitative field, Python programming experience, and familiarity with optimization techniques.

Master's thesis focusing on simulating a biogas-fed Solid Oxide Electrolysis – Fischer Tropsch Synthesis System. Tasks include modeling, validating, and optimizing the FTS process in Aspen Plus.

Experienced Site Manager needed for a part-time, 3-month freelance contract overseeing three interior fit-out projects in Berlin. Responsibilities include coordinating site activities, managing subcontractors, and ensuring safety and quality standards. Fluent German is required.

Tieto Tech Consulting seeks a motivated and experienced SAP Consultant to join their SAP Finance team in Berlin. The successful candidate will contribute to shaping the future of customer digitalization journeys.

Experienced MEP Construction Manager needed for hyperscale data center projects in Germany. Lead on-site MEP delivery, manage subcontractors, and ensure safe, on-schedule, high-quality construction.

Own end-to-end recruiting for Supply Chain roles, building teams for new operations. Drive process standardization across Germany using active sourcing. Requires recruiting experience and fluency in English and German.

Provide senior-level consultancy, project leadership, and strategic oversight for large-scale, high-value projects in the Hi-Tech sector. Lead multi-disciplinary teams, ensuring projects are delivered to the highest standards of quality, safety, and performance. Manage commercial performance, client engagement, and risk management.

Experienced Category Manager needed to lead global sourcing strategy for a key electronics commodity in automotive procurement. Responsibilities include negotiating commercial agreements, managing supplier performance, and partnering with R&D. Requires automotive procurement experience and strong negotiation skills.

Thesis Student role involving analysis of current automation for thermal runs and development of automated solutions, including CAN control optimization for frequency inverters. Requires study in mechatronics or electrical engineering.

As a Sales Engineer, you will develop and maintain customer relationships, analyze global markets, and implement sales strategies to drive revenue growth in key markets. You will provide technical expertise on dry vacuum technology and support the global sales organization.

Leads a team to ensure safe, efficient, and high-quality operations at a fulfillment center. Oversees projects to improve processes, productivity, and customer service. Analyzes shift performance and implements actions to enhance operational excellence. Collaborates with management to standardize shift practices.

Chief Engineer responsible for ensuring data center MEP operates at 100% availability. Duties include maintenance, emergency response, and managing large-scale facility projects. Requires engineering background and experience in critical environments.

Scientific Education Manager for Dental Solutions EMEA will develop and deliver educational programs, build relationships with Key Opinion Leaders, and provide clinical support on digital orthodontic and restorative products. Requires a dentist degree, fluency in French and English, and experience in curriculum design and Key Opinion Leader strategy.

Head of Engineering to own technical direction and execution for a construction tech company. This player-coach role involves shaping the technical foundation, AI systems, and engineering culture while building and mentoring the team.

Director Regulatory Reporting & Risk at Verifone. This role involves shaping risk culture, supporting Finance risk assessments, monitoring controls, and preparing risk reports for supervisory authorities. Requires 5+ years in Enterprise Risk.

From August 2026 our secondary school in Dreieich (near Frankfurt) is looking for a Mathematics Teacher (in part-time or full-time)

Strategy Consulting Intern (f/m/d) for 10+ weeks, October 2026 - March 2027. Analyze customer requirements, conduct market research, and assist with strategic planning. Must have at least four completed semesters of Bachelor studies, one internship in strategy consulting, and fluency in German and English.