java English-speaking jobs in Mainz

Supply Chain Quality Manager for Airbus Operations in Bremen. Manage supplier quality, ensuring compliance with certifications and on-time quality performance. Monitor new product introductions and supplier performance. Assess supplier capacity, capability, and risks. Report on supplier operational performance.

Jitterbit seeks a driven Inside Sales Representative to cultivate new business opportunities and close deals within the DACH region. The ideal candidate will have a proven track record of B2B technology sales success and a passion for exceeding expectations.

Investment Banking Vice President to support senior bankers in executing complex deals, driving revenue growth, and building relationships with DAX-listed corporates, mid-market firms, and institutional investors across Germany and the EU.

Senior Sales Manager to drive the success of Tieto's Financial Services business in Central Europe. Lead strategic sales initiatives, build customer relationships, and expand Tieto's footprint in the Financial sector.

The Chief Product and Technology Officer leads product strategy, portfolio management, and roadmap decisions for a DeFi ecosystem. This role defines product direction, ensures product quality, and guides technology choices to support product strategy and delivery goals.

The Sr. Fleet Operations Manager ensures vehicle roadworthiness and compliance across Germany, Austria, and the Netherlands. This role executes fleet initiatives, supports delivery partners, and manages vehicle operational readiness.

Senior Legal Counsel needed to provide strategic legal advice on commercial and regulatory matters for a fast-growing investment firm in Berlin. Responsibilities include advising on compliance, supporting private equity fund projects, drafting contracts, and collaborating with stakeholders.

Do Well Do Good seeks Founding Partners to launch and grow their own consulting offices. Partners will build client pipelines, deliver projects, and achieve €500K revenue in Year 1. Ideal candidates have 4+ years in strategy consulting or sales/entrepreneurship with expertise in energy, mobility, circular economy, construction, or decarbonization.

Senior / Principal HVDC System Design Consultant will develop cutting-edge HVDC transmission solutions. Responsibilities include design and feasibility studies, system and equipment design, system studies and modeling, control and protection strategies, technical negotiations and testing, and reporting. The role requires a university degree in Electrical Engineering (or a related field) and 7+ years of experience in HVDC projects.

Senior Quantity Surveyor to manage construction projects in Germany, focusing on industrial, data center, and office fit-out projects. Requires 5+ years' experience, fluency in German and English, and a degree in Quantity Surveying or related field.

ParityQC seeks a Quantum Error Correction Engineer to develop pioneering algorithms for fault-tolerant quantum computing. The role involves designing and implementing strategies leveraging error correction codes and noise-biased hardware platforms.

Lead and scale Scalable Capital's Accounting function, covering German GAAP (HGB/RechKredV) and IFRS requirements. Design, standardize, and automate accounting processes, own cross-functional projects, and manage the monthly and annual close.

The Senior Originator will manage the end-to-end lifecycle of contracted assets, from evaluation and pricing to execution and performance monitoring. Responsibilities include contributing to desk PnL through trading strategies, working with the Origination team on business development, and developing tools for deal evaluation and back-testing. The role requires a strong market view of European energy markets and experience in position management and portfolio optimization.

Lead and manage railway vehicle projects from handover to delivery, ensuring on-time, profitable completion. Build and manage project teams, drive stakeholder collaboration, and report project progress to management.

Hire Resolve is seeking experienced petrochemical professionals for roles in refinery, chemical, and downstream manufacturing operations across Germany. These mid- to senior-level positions offer pathways to leadership roles.

We are seeking a highly motivated individual to conceptualize and build a new revenue vertical for our rapidly growing property management company. This role involves driving geographical expansion, transforming portfolio companies into scalable technology entities, and leading recruitment efforts. Native-level German fluency and the ability to work independently are essential.

SAP Finance & Controlling Consultant needed for development, support, and design of SAP modules (FI, CO, SD, CO-PA, MM, AA) and related enhancements. Experience in SAP S/4HANA conversion and international implementations required.

Experienced Chief Commercial Officer needed to define and execute global revenue strategy for a high-growth infrastructure platform. Drive revenue growth, market expansion, and customer engagement. Lead sales, marketing, and customer success teams. Proven track record of commercial leadership and revenue growth in high-growth environments.

Research Associate (m/f/d) in the field of “Integrated photonic resonators for molecular sensing”. The position involves experimental work on the development of photonic resonator cavities for molecular sensing, including exploring multi-signal approaches. Collaboration with specialists in optics, microelectronic design, clean-room processing, and advanced micro/nano metrology is required.

Shape Advantest's process, data, and technology landscape as a Global E2E Enterprise Architect. Develop and maintain the enterprise architecture vision, strategy, and roadmap, aligning business goals with technological capabilities. Analyze emerging trends and technologies, assess their impact, and recommend adoption strategies. Lead the design of a scalable, integrated architecture to enable Advantest's growth. Collaborate with business, process, data, and solution architects to ensure architectural coherence.