java English-speaking jobs in Mainz

Working Student - Business / Founder's Associate drives commercial execution and growth testing. Responsibilities include GTM execution, outbound sales, and partnering with founders on strategic projects. Requires a university student fluent in German.

Research Associate needed for R&D in innovative analytical methods for battery materials. Focus includes operando SAXS and XAS, data evaluation, and scientific publications. Requires a Ph.D. in Chemistry or related field.

Global Bank seeks Vice President, Trade Finance to manage an Investment Grade Corporate Banking portfolio. Responsibilities include providing sophisticated solutions, growing client share, and developing new business. Requires 7+ years in Trade Finance with strong financial analysis and credit assessment skills.

Lead all financial activities, focusing on accounting leadership and full finance operations. Ensure accurate reporting under HGB and IFRS, manage financial closing, and act as a key business partner. Requires finance degree and strong experience in financial closing and HGB/IFRS.

Seeking a (Senior) Scientist Bioanalytics to oversee PK, immunogenicity (ADA/NAb), and PD assays for clinical and non-clinical development. This role involves strategy, assay support, and managing external labs.

Technical Co-Founder/CTO to own the technical vision and build infrastructure for reliable AI agents. Requires strong software engineering, backend/distributed systems knowledge, and hands-on product building experience.

Junior Marketplace Specialist manages product data, listings, pricing, and promotions on Amazon. The role involves analyzing sales data, supporting new product launches, and using AI tools. Curiosity and comfort with data are key.

Seeking an English-speaking Anatomy & Biology Teacher for a freelance position. Prepare prospective medical students for admission exams and first-year studies by teaching fundamental Biology and Human Anatomy.

Supply Chain Project Manager to plan and coordinate cabin supply chain activities for serial aircraft. Responsibilities include managing procurement, risk mitigation, and performance monitoring. Requires studies in Industrial Engineering or Business Administration and experience in Supply Chain.

AI Consultant translates AI & Automation strategy into business value. Identify and prioritize use cases, facilitate assessments, and translate needs into actionable requirements. Requires expertise in AI/Automation, data-driven decision-making, and strong communication.

Learning Specialist to take end-to-end ownership of the Transportation Associate Programme (TAP) learning in DTM and UK South. Responsibilities include launching content, managing training, and building quality control. Requires fluency in German and English.

Own the full lifecycle of mid-market reseller business across DACH. Identify, sign, and enable VAR partners to drive pipeline, resale revenue, and installed base expansion for Freshworks. Requires 7+ years in SaaS channel management.

Lead SAP Data Migration workstream through mock conversions to go-live. Requires strong SAP FI/FI-AA and Asset Accounting migration experience, data quality assurance, and coordinating technical and business teams.

Data Science Expert role at SAP. This position involves contributing to SAP's innovations that help customers work more efficiently and use business insight effectively.

Service Engineer executes service, repair, and maintenance on MacGregor products like hatch covers and cranes. Requires mechanical, hydraulic, or electrical background, technical skills, and willingness to travel globally.

Own feature development for FundedOS, a SaaS solution. Requires 4+ years experience with PHP, TypeScript, Symfony, Next.js, Docker, Kubernetes, and Helm. Good English and basic German skills are needed.

Are you a persuasive communicator who enjoys leading teams and building strategic sales processes? Do you want your work to actively contribute to the sustainable growth of clients and to the success of a forward-looking energy business? Then join us and be part of something meaningful. Together, we drive progress—for a better future, for ourselves, and for generations to come.

Senior Account Manager for Google Ads to own e-commerce client relationships across the DACH region. Manage and optimize Google Ads campaigns with budgets up to €50K+. Requires 3+ years of Google Ads/PPC experience and native German skills.

Scientist to advance crop nutrition product development, focusing on high-efficiency P and N fertilizers. Requires Master's degree plus experience in crop nutrition or soil science.

TUM seeks Professors in Aerospace for Winter 2027/28 across career levels. Research areas include Quantum Space Technologies, Payload Systems, Space Applications, and Cyber-security. Roles involve research, teaching, and promoting early-career scientists.