java English-speaking jobs in Mainz

Accounts Receivable (AR) Clerk role involving end-to-end AR activities supporting European clinic operations. Requires 3+ years in a similar finance role, strong analytical skills, and fluency in German and English.

Hands-on Office & Studio Administrator needed to keep a livestreaming studio running smoothly. Tasks include office management, stocking supplies, and setting up/resetting sets. Requires organization, proactivity, and flexibility with hours.

Seeking a Full-Stack Developer proficient in Java/Kotlin, Python, and SQL to develop and maintain applications. Responsibilities include building front-end features, designing REST APIs, and ensuring code quality. German fluency is required.

The role involves maintaining and developing the SAP S/4HANA system landscape. Core duties include ensuring stable SAP operations, managing installations, upgrades, and supporting integrations. Requires relevant SAP Basis experience.

Lead the legal department for a software producer, advising the Executive Board on strategic and complex legal matters. Responsibilities include compliance (GDPR, NIS 2), contract management, and team leadership. Requires a qualified attorney with IT law expertise.

Student Assistant role in Translational Oncology/Immunotherapy at DKFZ. Support research using gene editing (CRISPR) and molecular biology techniques, including T cell isolation and cell culture. Master's level enrollment required.

Lead the Financial Operations team, overseeing operational financial processes like invoice processing. Drive standardization, digitalization, and process optimization while managing AR and AP activities. Requires finance experience and team leadership.

Master's thesis focusing on modeling and intelligent control of a dual-input RF Power Amplifier System. Tasks involve behavioral modeling, ML for parameter dependence, and developing ML control for temperature variations. Requires background in CS, EE, or Physics with applied math.

Director role focused on Genesys native AI and Experience Orchestration portfolio. Requires subject matter expertise in AI-powered customer experience, leading stakeholder discussions, and driving field execution of AI programs.

As Business Controller for IT and R&D, you will partner with leadership teams, driving performance, enabling strategic decisions, and shaping the future of IT and R&D. You will own budgeting, forecasting, and long-term planning, prepare monthly closings, and develop recommendations to optimize business results. You will also support the development of IT and R&D strategy, assess business cases, and lead projects to improve efficiency.

Lead and develop high-performing Brand Ambassador teams in Germany. This hands-on role involves field coaching, training, performance analysis, and driving sales KPIs for a fast-growing DTC pet nutrition brand. Fluent German and English required.

Account Executive to own the German market for quantum security. Drive the full deal cycle for critical infrastructure and regulated enterprises. Requires 6+ years of B2B enterprise sales experience and fluency in German and English.

Senior SAP FI Consultant will participate in national and international SAP Financial projects, gathering requirements, designing solutions, and customizing modules.

Security Assurance Solutions Architect to help enterprise customers operationalize the shared responsibility model while migrating workloads to AWS. This customer-facing role addresses risk, regulatory, and compliance requirements.

Sales Manager for Life Science CEE leads regional sales, formulates strategy, and manages sales forecasts. Requires a Life Sciences degree, extensive sales experience in academia/biopharma/biotech, and leadership of sales teams. Fluent in German and English.

Advanced Fullstack Developer I designs, develops, tests, and maintains scalable web applications. Requires 3–5 years of experience with C#, .NET Core, ASP.NET Core, and React.js, plus experience with REST APIs and SQL Server.

Electronics Engineer/Technician to integrate components into vacuum control systems. Requires a degree in Electronics/Mechatronics or relevant experience, proficiency in schematics, and strong problem-solving skills.

Experienced software development team lead develops technical concepts and supports agile teams. Analyzes requirements, leads and coaches development teams, conducts code and architecture reviews, and collaborates with stakeholders. Requires a degree in Computer Science or related field, leadership experience in software development, and strong interpersonal and technical skills.

Head of BESS & Renewables to lead and develop the BESS & Renewables business. Responsibilities include defining market strategy, scaling commercial activities, and building high-performing teams. Requires energy sector experience and strong commercial skills.

Lead the global engineering network for Plansee HPM, driving digital transformation and standardizing CAD, CAM, and PLM tools. Manage international teams and champion automation within the engineering organization.