java English-speaking jobs in Mainz

Experienced Medical Safety Physician Product Lead (Director) to provide strategic medical safety leadership across the full product lifecycle. Lead safety oversight for assigned products, particularly early development programs, and support global regulatory submissions.

Head of Engineering to own technical direction and execution for a construction tech company. This player-coach role involves shaping the technical foundation, AI systems, and engineering culture while building and mentoring the team.

Treasury Manager to optimize liquidity, FX, and working capital. Responsibilities include managing collateral, forecasting cash flows, and driving process automation within a dynamic energy trading environment.

Production Supervisor to lead and develop teams, ensuring timely execution of production programs. Responsibilities include managing workflows using Lean principles and maintaining compliance with quality and safety standards. Requires technical qualification and manufacturing leadership experience.

UX/UI Designer focused on AI and Design Systems. Responsibilities include building scalable Figma component libraries, designing AI-powered experiences, and creating high-fidelity UI for enterprise applications. Requires strong UX/UI and Design System expertise.

Deliver groceries to customers efficiently by e-scooter or e-bike. Maintain a focus on delivery targets and exceed them. Must be at least 18 years old with a valid work permit, driving license, and English or German language proficiency.

General Manager, Germany, leads the consolidation of three brands (sevdesk, Kontist, Shine invoicing) into one market business. This role owns total German revenue, commercial budget, and leads the local commercial team.

Project Manager ensures successful delivery of major electrical/power distribution projects, mainly for data centers. Requires 5+ years of project/site management experience and a strong electrical background. Fluent German is required.

Join our team and help deliver smiles! Assist with unloading, lifting, transporting, scanning, and sorting Amazon products. Must be 18 years or older, proficient in German and/or English/Polish, and able to understand and follow safety guidelines.

Define and deliver the AI platform strategy for a leading financial services organization. Own the end-to-end design, delivery, and governance of the AI platform engineering function, leading MLOps and AI Platform Engineers.

Experienced Site Manager needed for a part-time, 3-month freelance contract overseeing three interior fit-out projects in Berlin. Responsibilities include coordinating site activities, managing subcontractors, and ensuring safety and quality standards. Fluent German is required.

Senior Coordinator for Revenue Operations/Billing. This role coordinates billing processes, supports attorneys and clients, and ensures adherence to guidelines. Requires experience in legal/professional services billing and strong German/English skills.

Experienced Marketing & Communications Manager sought for Tieto Tech Consulting. Drive marketing and communications strategies for a team focused on solving complex technology challenges and delivering impactful digital solutions.

Lead business and operational growth for Siemens Advanta in the DACH sub-region. Drive growth through strategic positioning, managing P&L, and leading complex digital transformation projects for major German enterprises.

Mechanical QA/QC Engineer needed for Semi-conductor or Pharma/Biopharma projects. Responsibilities include attending walkdowns, compiling punch lists, supervising trade resources, and ensuring accurate as-building documentation. Requires a Mechanical Engineering degree or pipefitting certification, knowledge of HVAC, piping systems, and P&IDs, and experience in a similar QA/QC role. Data Centre experience is a plus.

Lead the acquisition and management of a high-potential, family-owned SME in Germany through AIA's MBI Program. Requires 5+ years in general management with full P&L accountability and deep German business roots.

Product Manager needed to shape security and perimeter protection solutions. Responsibilities include advising customers, designing security solutions, managing tenders, and developing training materials. Requires technical background, strong communication skills, and fluency in German and English.

Lead backend and fullstack engineering teams building real-time AI conversation systems at scale. Requires 7+ years as a software engineer and 3+ years leading teams with strong technical credibility.

Digital Design Expert to design advanced Mixed-Signal and SoC ASICs for leading consumer applications. Responsibilities include digital module concept definition, circuit design, and validation. Requires 5+ years in IC digital design with VHDL/Verilog expertise.

Senior Marketing & Communications Specialist to strengthen Tieto's brand in Germany. Responsibilities include PR, content marketing, digital campaigns, and website management within IT consulting. Requires 4+ years of B2B IT marketing experience.