java English-speaking jobs in Mainz

Director of Sales (Europe) for Multi-Layer CUAS. This quota-carrying role drives revenue by owning complex, end-to-end sales cycles in the defense/HLS sector, from engagement to contract award.

Machine Learning Engineer to deploy AI onto real unmanned systems across air, land, and sea. Responsibilities include productionizing computer-vision models, training deep-learning models, and building ML platforms. Requires experience in AI, ML, or robotics with strong Python, C++, or Rust skills.

Senior Legal Counsel advises on German employment and labour law. Responsibilities include leading Workers Council negotiations, advising on compliance, and managing international labour relations. Requires expertise in German law and stakeholder management.

Senior finance leader partnering with Product and Engineering to drive profitable growth across SEF's global portfolio. Responsibilities include P&L support, investment analysis, and leading strategic planning. Requires 10+ years of relevant experience and fluency in German and English.

Client Director responsible for account success and sales expansion. Manage senior teams, monitor KPIs, and drive strategic customer development using digital experience knowledge. Requires experience with global accounts and strong German/English skills.

Drive business growth by identifying clients and market opportunities in sea freight sales, ideally on Asia-Europe trade lanes. Build and maintain strong relationships with key accounts and decision-makers.

Lead and scale the software organization for a next-generation quantum computing platform. Define the software strategy across the full stack, from embedded control to cloud services. Requires 8+ years of software experience and 5+ years in senior leadership.

Experienced Head of Manufacturing needed for a pharmaceutical site in Germany. Take full ownership of end-to-end operations, including production, packaging, and warehouse, while leading a transformation program. Must have GMP experience.

Delivery Solutions Architect for Oil & Gas. This hybrid role drives customer growth and ensures success by leading post-sale technical strategy and execution for complex Databricks workloads. Requires 5+ years in Data/AI technical delivery.

Qualifications Completed scientific university education (M. Sc. / M. A. / Diploma / Magister) in Economics or a related quantitative-mathematical discipline with outstanding grades. Talented and motivated applicants with a strong interest in Economic Theory and Policy, Industrial Organization, Behavioural Economics, International Economics, Empirical Economics, or Econometrics.

Lead the Impacts, Adaptation and Loss & Damage Team, providing strategic and scientific direction. Shape the team's focus on climate impacts, adaptation, and loss and damage, particularly for SIDS and LDCs.

The Max Planck Institute for the Structure and Dynamics of Matter seeks a Technician for Laboratory Infrastructure. This role supports research investigating dynamical phenomena within matter using ultrafast probes.

Enterprise Architect role combining technology standards, governance, and business alignment with hands-on engineering. Define roadmaps, maintain architecture, and build tooling for modern software and AI development.

Experienced Head of Finance & Controlling needed. Oversee finance and accounting (IFRS, HGB), manage reporting, budgeting, and cash flow. Requires business administration degree, team leadership, and SAP R3/DATEV knowledge.

Senior Embedded Linux Software Engineer to build AuterionOS for autonomous robotics. Responsibilities include adding drivers, maintaining services, and optimizing performance on embedded platforms using C/C++, Python, and Bash.

Principal Machine Learning Engineer to build, deploy, and scale production-ready ML systems. Own the end-to-end ML lifecycle, translating business problems into scalable solutions using Python, TensorFlow/PyTorch, and data infrastructure.

Define next-gen digital/analog multiphase controller architectures for AI, Cloud, and Data Center applications. Own architecture, technical definition, and roadmap for Buck Controllers and VR. Requires 10+ years in semiconductor/power electronics.

Lead and scale an engineering organization responsible for rebuilding core platform modules into a modern, AI-native architecture. Manage, coach, and develop a team of Engineering Managers. Drive modernization and provide architectural oversight, ensuring alignment with the tech stack.

Serve as a technical authority and trusted advisor to sales teams and customers. Develop deep understanding of customer goals, articulate solution value, and enable partners. Fluency in German is essential.

Senior technical leader to build and scale the engineering team at an e-mobility startup. Guide architecture, drive AI-native development, and ensure fast, structured delivery while balancing technical trade-offs with business growth.