java English-speaking jobs in Mainz

Product Engineer for E-Bike Systems takes technical ownership of the gDrive system. This role combines system engineering, product engineering, and project management across cross-functional teams. Requires relevant engineering degree and experience.

System Engineer for AI Data Center Solutions. Design modern network solutions, prepare technical documentation (BOMs, layouts), and provide technical support across EMEA. Requires an Engineering degree and 2-5 years in Telecom or Data Center design.

Early Childhood Educator role requires a degree in Early Childhood/Elementary Education and experience with children. Tasks include care, activity design, and implementing educational plans in bilingual settings. Proficient English is required.

Join the Siemens Graduate Program focusing on Industrial Product Management at Mendix. This role involves shaping industrial software solutions, digital manufacturing, and Industry 4.0 transformations. Candidates need a relevant Master's degree and skills in problem-solving.

CRM Data Assistant supports a major automotive and technology group by ensuring CRM data is clean, structured, and compliant. Duties include updating records, merging duplicates, and performing data audits. Requires strong attention to detail and proficiency in spreadsheet software.

Brand Manager for Danone's brands like Volvic and Activia. Drive sales performance understanding, manage A&P budgets, and support brand strategies. Requires 3+ years in consumer goods brand management and fluency in German and English.

Ensure software and hardware products meet high quality standards throughout the development lifecycle. Develop test strategies, design manual/automated test cases, and perform various testing for medical devices. Requires strong analytical skills and German B2/English C1.

Lead pursuit engineering for automotive low voltage Lithium Ion, Sodium Ion batteries, and super capacitors. Design electronic systems, collaborate with customers, and manage concurrent projects focusing on cost and standards.

Content Operations & Production Manager to drive a busy content and production function. Responsibilities include managing the content pipeline, planning schedules, owning workflow, and coordinating production logistics for shoots.

Submit your CV for consideration even if no current position is open. We review unsolicited applications to find a suitable role within our team.

Senior Compliance Verification Engineer needed for Cabin & Safety. Ensure compliance with EASA and FAA requirements for aircraft interior modification programs. Requires expertise in Cabin Safety Certification, TSO/ETSO, and relevant engineering degrees.

Lead Data Engineer needed to design, build, and evolve scalable data platforms. Guide project teams, translate business needs into data solutions, and optimize data workflows. Requires 7+ years experience in data solutions, platforms, and interfaces, strong data modeling expertise, and experience with cloud-based data platforms. Fluency in German (C1 level) and English is required.

Scientist for Bioavailability Assay Development supports active ingredient characterization using agrokinetic approaches. Requires M.Sc. in Biology/Biochemistry, strong hands-on molecular biology/biochemistry skills, and experience in organelle isolation.

Technical Project Manager driving qualification projects for gas turbine components. Responsibilities include planning, monitoring supply chains, managing risk, and optimizing processes. Requires a relevant engineering degree and project management knowledge.

Freelance Video Game Translator needed for English US to Hungarian. Responsibilities include in-game text, marketing content, subtitling, and LQA. Requires native Hungarian and excellent English US, plus experience localizing games and proficiency in memoQ and Plunet TMS.

PhD student position in medical imaging and elastography. Develop ultrasound and MRI techniques for quantitative tissue mechanics investigation. Requires background in relevant science/engineering and interest in translational research.

Financial Sales Advisor builds long-term client relationships, providing excellent financial advice. Responsibilities include analyzing products and understanding client financial circumstances. Requires interest in finance and sales, strong communication, and fluent English.

Research Assistant needed in chemistry, physics, civil engineering, mineralogy, or materials science. Responsibilities include project implementation, sample preparation, and material analysis using techniques like ToF-SIMS and XRD.

Experienced Full stack Developer needed for AI Harness Codebase Hardening. Tasks include optimizing Python/Node.js backends, Dockerizing for AWS, and building TypeScript front ends from Figma designs. Requires strong full stack and cloud migration experience.

Associate Workplace Operations & Experience Coordinator manages office maintenance, community engagement logistics, onboarding, events, and safety protocols. This part-time role requires strong execution, problem-solving, and customer service skills.