java English-speaking jobs in Mainz

Senior Power Trader sought for established trading desk. Proven track record in Short Term German Power Markets, Month-ahead to Day-ahead, and automated trading required.

Data Engineer will manage and operate Databricks and Azure Data Lake Storage. Responsibilities include building and maintaining data pipelines, supporting SAP Business Data Cloud (BDC) implementation, and defining data modeling standards. Requires a degree in computer science, business informatics, or equivalent, 5+ years of data engineering experience, and proficiency in Python.

Process Engineer to identify inefficiencies and drive operational excellence using Lean/Continuous Improvement methodologies. Monitor project progress, build roadmaps, and partner with cross-functional teams. Lean Six Sigma Green Belt preferred.

The Leibniz Institute for Neurobiology seeks a W3 Professor of 'Integrative Neurobiology' to lead a new research group. The position is jointly appointed at the Faculty of Natural Sciences, OVGU, and includes teaching responsibilities. The successful candidate will establish and lead a research group focused on experimental and computational neuroscience or neuroengineering. Applicants should have experience leading international research teams, acquiring third-party funding, and supervising doctoral students.

Manage and coordinate complex cross-border transaction tax engagements, providing guidance on mandates including tax due diligence and structuring. Develop and oversee tax-efficient planning aligned with client goals. Cultivate strong client relationships and guide junior team members.

We are seeking a (Senior) Firewall / IT Security Specialist to establish, develop, and optimize IT security. Responsibilities include administering firewall systems (Cisco and Fortinet), implementing network hardening measures, and ensuring a scalable security architecture.

Patent Attorney or Lawyer - Litigation Associate to support and lead complex patent disputes in technically complex industries. Responsibilities include litigation management, strategic advisory, technical analysis, cross-border coordination, and drafting legal documents.

Regional Head of Accounting will manage and oversee accounting operations, ensuring financial record accuracy, regulatory compliance, and robust internal controls. This role involves supervising bookkeeping, coordinating closings, managing reconciliations, and preparing financial statements.

Danaher seeks experienced HR professionals with a background in HR Business Partner and HR Generalist roles for future opportunities in Diagnostics & Life Sciences across DACH.

Develop and strengthen technical relationships with inverter OEMs, module manufacturers, and power electronics customers across EMEA. Support customers from technical demonstration through design-in, helping them integrate advanced sensing and power electronics solutions.

Manages global website strategy, content, and implementation for a publicly listed company. Develops and implements website strategy, coordinates with internal teams, and ensures consistent, compliant, and high-quality content. Manages and optimizes the global website, including updating content and creating new websites. Supports SEO, keyword, and SEA initiatives to improve visibility and reputation. Monitors and reports global website KPIs and derives insights to improve communication activities.

The Technical Leader manages engineering activities for battery storage projects, including defining interfaces, technical offers, and project execution.

Leads and develops a national real estate consultancy business in Germany, holding full P&L responsibility and driving sustainable growth.

Senior Project Manager to lead a complex talent program for a global automotive client. Manage a team, drive quality and innovation, and maintain client relationships. Requires fluency in German and English.

Senior IT Project Manager to lead a company-wide HR system migration. Responsibilities include project planning, stakeholder management, data migration, and go-live support. Requires several years of IT project management experience in migration projects and strong stakeholder management skills. C1+ German required.

Project/Construction Manager to oversee a portfolio of residential development loans in Germany. Responsibilities include reviewing technical aspects of loans, supporting credit processes, managing consultants, and monitoring development progress.

The General Counsel is FSC's senior legal leader, responsible for transforming the Legal & Compliance unit into a globally integrated, business-oriented capability. The role requires strengthening FSC's legal presence across the FSC Group, building internal legal capacity, and reducing reliance on outsourced legal advice. The General Counsel will provide strategic legal and compliance leadership, oversee global legal operations, and transform the legal function through process and systems improvement, team development, and external counsel management.

This role supports sustainability reporting, data quality, and audit readiness across ESG topics. Responsibilities include managing ESG reporting, CBAM reporting, Product Carbon Footprint data, internal audits, and sustainability control development.

Senior BESS Project Developer will lead large-scale battery storage projects in Germany from concept to completion. Responsibilities include project structuring, stakeholder management, contracting, budget oversight, and feasibility analysis. Requires a relevant degree and 3+ years of renewable energy project management experience. Fluency in German and English is essential.

Design and implement software solutions for a service-oriented platform. Develop .NET Core interfaces with Azure cloud services. Accompany solutions throughout their lifecycle.