freelance English-speaking jobs in Bielefeld

Java Full Stack Developer needed for large-scale, complex application development. Requires strong experience with Java 8+, Spring Framework, Microservices, REST APIs, and design patterns. Full stack experience with front-end UI and backend integration is preferred. Experience with cloud platforms, CI/CD, and testing frameworks is also required.

Payment Operations Specialist will test and monitor e-commerce payments, handle payment-related tickets, and create development tickets. The role involves supporting management on payment methods, assisting with system maintenance, and investigating payment issues.

Research Associate for the Project Group “Turning Rock into Pixels: The Jewish Cemetery Altona” will conduct a three-year individual research project focusing on the Jewish cemetery in Hamburg-Altona. The position is part-time (75% in the first year, 50% in the second and third) and includes teaching duties from the second year onward. Applicants must submit a project proposal (3-5 pages plus bibliography) that aligns with the project's focus on the materiality of sources and the overall research program of the Cluster of Excellence ‘Understanding Written Artefacts’.

RF Sales Engineer to develop new business and manage existing accounts, providing technical consultation on RF and electronic components.

Support Investment Managers in financial evaluation and execution of M&A opportunities. Create project-specific financial assessments and research, analyze, and present valuation results. Assist in all stages of the M&A process, including transaction management, marketing materials, and due diligence.

Yamaha seeks a Paid Advertising Specialist to plan, execute, monitor, and optimize paid advertising campaigns across Google, Meta, YouTube, and TikTok. This role involves collaborating with internal stakeholders, external agencies, and platform partners to ensure effective media planning and performance reporting across Europe.

Product Marketing Manager will research customer needs, define product strategy, and develop go-to-market plans. This role requires 5+ years of experience in product marketing, strong communication and analytical skills, and a customer-centric mindset.

cylib, a German scaleup specializing in holistic battery recycling, invites speculative applications. Successful candidates will have completed technical training or studies and relevant industry experience. They should be enthusiastic learners, organized, and possess strong communication skills. Fluency in German and English is required.

We are looking for an experienced and strategic Medical Director (m/f/x) to provide medical leadership for a mature global Phase 3 program in relapsing Multiple Sclerosis. In this role, you will combine deep strategic understanding of MS clinical outcomes with hands‐on medical monitoring expertise to support the successful execution of a registrational study, evaluating safety and efficacy.

FE-Simulation Specialist needed for wind turbine drive trains. Responsibilities include modeling components and systems in Ansys, performing FE calculations, and collaborating with the design team. Requires a Master's degree in mechanical engineering, experience with Ansys, and knowledge of drive systems.

Strategic Purchasing Manager fluent in Korean and English will drive supplier sourcing, negotiations, and onboarding for a global team. Responsibilities include supplier qualification, price negotiations, and monitoring international trade regulations. Requires experience in strategic purchasing, APQP/PPAP, and cross-cultural collaboration between the US, Europe, and Korea.

Regional Account Manager for Ergotron's Healthcare, Industrial, and Workspace verticals in South-West Germany. Develop sales, expand customer base, and support channel partners. Requires 10+ years B2B sales experience, proven track record in business development, and fluency in German and English.

Manage a portfolio of project finance transactions primarily in the Telecom, Media & Technology (TMT) sector. Collaborate with clients, sponsors, and internal teams to execute key portfolio management actions. Analyze industry trends and contribute to local and global initiatives.

CourtPass seeks a remote Country Representative to onboard racquet sports clubs, promote the platform, and build relationships with partners.

Principal Consultant to lead end-to-end retained executive search assignments for Industrial and Aerospace clients in Germany and the DACH region. Manage hiring manager relationships, develop search strategies, and conduct candidate assessments. Requires fluency in German and English, substantial executive search experience, and sector knowledge.

Trainee Editor/Translator will edit and proofread ECB materials, website content, and social media posts. Will also contribute to writing initiatives and occasionally translate from EU languages into English. Requires a bachelor's degree in modern languages or translation, experience in copy-editing, and fluency in English and at least one other EU language.

Lead, manage, and grow a team of engineers focused on digital identity and secure authentication for customers. Collaborate with product managers and stakeholders on project planning, risk management, and process improvement. Support team growth through mentoring, feedback, and performance management.

Head of Tax will lead the group's tax position across Germany and Europe. Responsibilities include managing the tax team, ensuring accurate tax liability calculations, and developing the intercompany charging model. The role requires experience in a scale-up company, European taxation, and financial services.

The Technical University of Munich seeks a Professor in "Carbon Composites" to begin in winter semester 2026/27. The professorship will be assigned to the TUM Department of Aerospace and Geodesy. The successful candidate will conduct research and teaching in carbon composite technology, with a focus on manufacturing processes and applications in aerospace, ground transportation, and energy systems.

Intern will contribute to sourcing, analysis, and execution of private credit investments. Support investment committee approvals, portfolio monitoring, and client reporting. Work directly with senior investment professionals on projects across the full investment lifecycle.