freelance English-speaking jobs in Hagen

Scientist will contribute genetic engineering expertise to R&D projects, designing, executing, and analyzing molecular biology experiments. Responsibilities include developing and optimizing constructs, validating them using transient expression systems, and planning genetic engineering workflows. The role requires a Master's degree or Ph.D. in a relevant field and several years of hands-on experience in genetic engineering.

Software Developer will design and develop advanced device software based on a SECS/GEM-compatible framework (C#). Responsibilities include managing customer interface coordination, software commissioning, and providing technical support.

Develop a Model Predictive Control (MPC)-based Energy Management System (EMS) for a modular office building. The thesis will focus on optimizing pre-heating and pre-cooling strategies, considering electricity prices, PV generation, and thermal storage and cooling equipment operation.

Full-stack engineer with a backend focus needed to build and maintain a user-friendly platform. Responsibilities include developing backend systems, collaborating on product features, and contributing to architectural decisions. Experience with React, Node.js, SQL databases, and CI/CD pipelines is required.

As a Venture Engineer Intern, you will develop new features from frontend to backend, including user interfaces with React.js and data models within Supabase. You will also integrate APIs, optimize performance, and participate in code reviews.

Lead and transform the global Hydraulic business unit (H+L) to achieve profitability exceeding 10% EBIT. Define and implement a global strategy, identify growth opportunities, and streamline operations. Oversee site-level operations and provide functional leadership for multiple international locations.

Manages and develops the own White Goods business, including growth targets, integration of CatMan, and international project support. Leads the MDA team, coordinates stakeholders, and drives business development. Requires a degree in economics, fluency in English and German, and strong leadership and communication skills.

Procurement Officer supports the effective and consistent delivery of procurement processes. Ensures value for money throughout the procurement to payment process. Manages travel bookings, purchase processes, and payment processing.

Manage and coordinate the global sales project roadmap across all channels, ensuring consistent execution and driving the rollout of global sales initiatives. Lead and contribute to strategic projects focused on improving sales structures, tools, and cross-channel integration. Define future-state sales processes and identify business needs for sales tools. Act as the primary global business contact for sales-related topics.

Endowed professorship for Metrology and new measurement methods for quantitative cell analysis at Charité - Universitätsmedizin Berlin and the Physikalisch-Technische Bundesanstalt (PTB). The position is a joint appointment according to the Jülich model with a limited employment status under private law in full-time. The professorship is linked to the management of the research area «Metrology and New Measurement Methods for Quantitative Cell Analytics» at PTB. The focus lies on developing new reference measurement methods to assess infection risks posed by emerging viruses and bacteria using advanced technologies such as optical imaging, flow cytometry, and artificial intelligence (AI).

Software Solutions Engineer (AI/ML) will prototype semiconductor test solutions, lead customer engagements, and apply AI expertise to develop innovative testing solutions. Requires a Bachelor's or Master's degree in a relevant field, experience developing AI-based systems, and proficiency in programming languages like C++, Java, or Python.

Provides support to staff across departments with travel, invoices, refunds, and inventory management. Supports scientific community by assisting with online application procedures for master and Ph.D. students.

Risk Manager (m/f/d) to support strengthening risk awareness, internal controls, and governance framework. Will contribute to the implementation of the Group Risk Architecture, monitor regulatory developments, and support risk reporting and management. Experience in ESG risk management, sustainability controlling, financial risk management, compliance, or audit within the financial services industry is required.

QA Engineer to create a manual test catalogue and automate payment processes using Playwright. Requires 3+ years of experience, Playwright or Cypress/Selenium skills, and proficiency in JavaScript, TypeScript, Java, or Kotlin.

Coordinate audit teams, prepare audit plans, and monitor budgets. Review fieldwork, produce reports, and maintain client relationships. Requires 5+ years of financial audit experience in RE/FSI/Funds/PE with IFRS, strong analytical and communication skills, and fluency in German/English.

Senior Software Engineer will build end-to-end solutions for the post-purchase experience. Responsibilities include designing and implementing scalable systems, shipping high-quality code, and collaborating cross-functionally. Technical skills required include experience building production software across multiple layers of the stack, proficiency in at least one modern language/framework, and experience with SQL and NoSQL databases.

Account Executive drives new business development through cold calling, emailing, and LinkedIn outreach. Responsibilities include executing outbound sales campaigns, qualifying leads, and collaborating with founders on pipeline development. Requires proven B2B sales experience, fluency in German and English, and comfort with autonomous work in a fast-paced environment.

Tenure track group leader position in experimental freshwater ecology. Develop and lead a research group focused on the impacts of global change on freshwater ecosystem functioning, community composition, and food-web structure. Strong expertise in experimental design and aquatic community ecology required.

The W2-Professorship (m/f/x) Change Management in Fashion Business at TEXOVERSUM School of Textiles focuses on teaching change processes in the fashion and textile industry. The successful candidate will develop degree programs, teach in English, conduct research, and collaborate with industry partners.

Senior Full Stack Developer will design, develop, and implement new features for the Heat Fleet platform, including backend (Node.js) and frontend (Vue.js) development. Responsibilities include API design, code quality assurance, and team collaboration. Experience with Node.js, TypeScript, Vue.js, and NoSQL databases is required. Fluent English is mandatory, basic to intermediate German is preferred.