freelance English-speaking jobs in Solingen

Develop backend systems for an intralogistics product using Java and Spring Boot. Design APIs for web and app interfaces. Contribute to Minimum Viable Products (MVPs) in a fast-paced environment.

Sales Manager to drive business development and sales for vehicle transport services within the automotive sector in Germany. Requires experience in OOG cargo, Breakbulk, RoRo shipping, and automotive clientele. Fluency in German and English is essential.

Tester Work seeks QA testers and tech enthusiasts in Germany for project-based opportunities. Perform test case executions, functional exploratory tests, and usability tests. Payments are made via PayPal, Wise, or Upwork within two weeks of project completion.

Postdoctoral Researcher (gn*) in the Sánchez Lab at the European Institute for Molecular Imaging. Focus on plexin receptors, combining single-molecule localization methods and cell biology to decipher their stoichiometry, dynamics, and role in various biological processes. PhD in life sciences required, experience in cell and molecular biology, and microscopy methods.

Regional Head of Life Sciences & Healthcare will set and execute global strategy for Air & Ocean, drive vertical growth, and manage key accounts. Requires proven experience in freight forwarding, logistics, and global customer management.

The Universities of Stuttgart and Freiburg offer 10 Research Assistant (Doctoral Researcher) positions within the DFG-funded RTG BioBuild. The program focuses on bio-inspired building envelopes that respond to weather and light conditions. Doctoral researchers will address topics in bioinspiration, materials research, process technology, and architecture.

Provides legal advice and documentation support for corporate lending transactions across EMEA, with a focus on German lending business.

Development Engineer (m/w/d) responsible for the entire product lifecycle, from ideation to marketing. Develops new product ideas, implements prototypes, and participates in production structure development. Requires a completed engineering or natural science degree, several years of relevant experience, and strong CAD skills.

Experienced systems engineers will build and lead operations and development teams for the European Sovereign Cloud (ESC), delivering high-availability AWS services exclusively for EU customers. Responsibilities include overseeing ESC launch in 2025, collaborating with global AWS teams, and ensuring availability, reliability, latency, performance, and efficiency of ESC services.

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.

Postdoctoral position in the project "Making Political Decisions" at the Cluster of Excellence "The Politics of Inequality". The position starts September 1, 2026, for four years. The successful applicant will contribute to research activities using experimental designs to study political decision-making.

Leads and oversees the global Digital Trust Product Certification (DTPC) portfolio, driving commerciality and creating go-to-market plans. Responsible for meeting sales targets and objectives across various DTPC services, including cybersecurity testing and certification, digital identity, and software cybersecurity. Identifies new market opportunities and develops strategies. Provides training on Digital Trust products.

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.

As Community Manager in Munich, you will deliver a high-quality customer experience for members, focusing on satisfaction, retention, and account management. You will act as the primary point of contact, managing member journeys and ensuring smooth daily operations.

The EU ES HVAC Quality Control & Field Support Engineer will analyze HVAC field issues, improve product and service quality, and support technical capability development across European markets. Responsibilities include providing technical support, creating training materials, and acting as a technical interface between HQ and European subsidiaries.

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.

Lead the people strategy for a fast-growing deep tech company focused on materials innovation. Design and scale hiring, performance, and organizational development processes. Partner with leadership to attract, retain, and develop top talent.

As Chief of Staff for Payroll Plus, you will own end-to-end execution, act as the primary product owner, and translate founder strategy into product initiatives. You will partner with payroll operations, drive discovery, and design both customer-facing and internal tools.

Senior Software Engineer to join the EO team, building core platform capabilities for Personio's HR platform. Focus on backend systems, APIs, and workflows, with occasional front-end contributions. Strong experience as a backend engineer and comfort in ambiguous environments are required.

Lead Tech Strategist (f/m/d) Core Platforms in Energy Retail will translate business strategy into technological capabilities. This role requires deep understanding of CRM/Billing Platforms and experience with SAP, Salesforce, Kraken. The ideal candidate will have a strategic mindset, strong communication skills, and experience leading IT organizational transformation.