freelance English-speaking jobs in Bielefeld

Develop full-stack Generative AI and Machine Learning applications for asset management. Collaborate with domain experts to translate business needs into technical requirements. Contribute to the development of prototypes and their scaling into production-ready applications.

Senior Software Developer and Architect with expertise in C# and C++ sought to design software architectures. Responsibilities include application development, integration of automated systems, and interface implementation.

Big Data Engineer needed to design, implement, and optimize data platforms (Splunk, Elasticsearch, Grafana, Cribl). Integrate data sources, build visualizations, and develop automated processes. Requires 2-5 years of experience, Linux knowledge, and fluency in German and English.

Project Manager for digital transformation projects focused on data quality improvement across SAP R/3 and S/4HANA systems.

The Investor Relations team at adidas seeks a student to assist with financial communication, prepare reports, and conduct analyses.

The Head of HSE will lead health, safety, and environmental activities for high-voltage grid and transmission projects in Germany. This role develops and implements HSE strategy, ensures compliance with German and EU regulations, and promotes a strong safety culture. The successful candidate will have extensive experience in high-risk energy infrastructure environments, particularly HV substations and transmission systems.

Knowledge Lawyer specializing in EU Capital Markets and Listed Company regulation. Provides expertise to lawyers across the global practice, focusing on areas such as Prospectus Regulation, Market Abuse Regulation, and Shareholder Rights. Monitors regulatory developments and translates them into client and internal initiatives.

Senior Software Developer will design and implement scalable backend systems and microservices using .NET, C#, Docker, Kubernetes, and React. Responsibilities include mentoring developers, leading by example in best practices, and driving architectural decisions. Requires a university degree in computer science, engineering, or a related field, at least 5 years of experience in software development using Microsoft .NET technology with C# as the main language, and strong backend development experience.

The University of St. Gallen seeks a Senior Lecturer in Programming and Algorithms to teach fundamental courses in its Bachelor's degree program in Computer Science. The successful candidate will combine teaching with compatible research interests and contribute to the development of new courses.

Designs and implements Voice of Customer (VoC) programs using qualitative and quantitative methods to drive product development and corporate strategy. Analyzes customer data, generates insights, and presents actionable recommendations to stakeholders. Leads cross-functional projects and workshops to translate customer insights into innovative product development opportunities. Collaborates with Legal, Compliance, and IT to ensure customer engagement complies with regulatory and ethical standards. Communicates customer-based recommendations to senior management.

Teamlead SAP Consultant FICO Finance & Controlling (w/m/x) needed for national and international SAP S/4HANA Finance projects. Requires 8+ years of consulting experience, including technical and disciplinary team leadership, and expertise in SAP S/4HANA finance and accounting systems. Must have strong communication and negotiation skills in German (C1 level) and English.

Lead and develop a team of Account Managers, driving growth for existing sellers across assortment, internationalization, and marketing. Manage key seller relationships, design KPIs, and implement AI-driven solutions to maximize commercial outcomes. Coordinate with Business Development, Seller Onboarding, and Customer Experience teams.

Senior IT Support Analyst will provide first and second-line technical support across global offices. Responsibilities include managing critical incidents, acting as a technical escalation point, mentoring IT support staff, and delivering premium support to C-level executives. Requires proven experience in a global IT support role, excellent communication skills in German and English, and relevant certifications.

Leads and directs the DACH region's general accounting, accounts receivable, billing, and payable functions. Develops and implements new projects, policies, and procedures to enhance efficiency and controls. Provides strategic vision for the accounting functions and mentors a team of professionals.

Leads the local marketing strategy for a key dermatology brand in Germany, translating European strategies into local initiatives and collaborating with cross-functional teams.

Drive revenue growth by positioning SAP solutions for customer digital transformation. Manage enterprise-level relationships, qualify opportunities, and guide clients through the sales lifecycle.

JetBrains seeks a Data Partner to analyze data requirements, design solutions, and manage data domains as a product. The role involves collaborating with data consumers and teams, managing projects, and ensuring data quality. Requires 5+ years of experience as a data partner or system analyst, strong SQL skills, and experience managing data-related projects.

SimScale seeks a part-time Interim CFO to design a scalable financial engine for our next growth phase. You will prepare for future financing events, build dynamic financial models, and architect a robust financial operating system.

Experienced RC pilot needed to fly experimental fixed-wing UAS during maiden flights, envelope expansion, and regression checks. Execute test cards under supervision, operate as Pilot-in-Command during LOS flights, and contribute to safety checks, telemetry setup, and post-flight documentation. Must have 3+ years manual RC flying experience, confidence flying new airframes, and familiarity with aircraft systems integration.

Network Architect designs and implements secure, scalable network solutions for Data Center, Azure Cloud, Security, LAN, WiFi, and SD-WAN environments. Requires experience in large-scale network environments, regulatory compliance (DORA, BAFIN, VAIT), and strong communication skills (German B1 minimum).