java English-speaking jobs in Mainz

Senior Data & AI Consultant to help clients turn data and AI ambitions into business value. Shape and deliver engagements across strategy, transformation, bespoke AI solutions, and platform development. Requires 5+ years in Data & AI and 2+ years in consulting.

Experienced IT Security Consultant to run threat modeling workshops, advise on Secure-by-Design, analyze cloud and software architectures, and improve security processes.

Postdoctoral Researcher in Computational Immunology develops novel statistical and computational methods for RNA biology and immunology. Requires a PhD in a quantitative discipline, expertise in statistical modeling, and advanced programming skills.

Materials & Planning Specialist ensures seamless material flow by reviewing production schedules, generating replenishment schedules, and tracking supplier deliveries. Requires ERP proficiency and fluency in German and English.

Senior Full-Stack Engineer develops and maintains complex web applications using PHP, Vue.js, and Node.js. Responsibilities include performance optimization, microservices design, and system monitoring. Expertise in Vue.js/TypeScript or modern PHP is required.

Senior Data Scientist for Logistics to optimize last-mile delivery operations. Requires 5+ years applying ML to real-world data, fluency in Python, and experience with regression/classification models.

Fullstack AI Product Engineer role involving distributed systems across Angular, React, iOS, Node/TS, and Go. Use AI tools to navigate complex codebases and build features across the stack.

Business Analyst for SAP MM, PP, and EWM. Responsibilities include supporting, developing, and customizing SAP modules, defining business processes, and providing Level 2 support across production and logistics sites.

Kitchen Assistant supports bagel topping production, ingredient preparation, and bagel shaping. Duties include maintaining BOH cleanliness and tracking food inventory. Must be comfortable with varied tasks and have a strong team spirit.

Senior Software Engineer (Backend-Leaning Full Stack) for a payment recovery platform. Own end-to-end projects using Python, Next.js/React, and PostgreSQL. Focus on billing integrations, data pipelines, and system design.

Lead, coach, and develop a high-performing outbound BDR team to drive pipeline generation for the DACH sales team. Requires 4+ years managing SaaS BDR/SDR teams and fluency in German.

EHS Safety Coordinator to support semiconductor industry activities. Responsibilities include safety checks, audits, incident reporting, and delivering safety training. Requires strong OHS knowledge, English fluency, and German proficiency.

This role supports and enhances medical infrastructure operations for the U.S. Army across Europe, Africa, and the Middle East. Responsibilities include facility readiness, strategic integration, and ensuring compliance with technical standards.

Freelance IT Director needed for a growing team. Requires engineering/technical background with leadership experience. Key skills include IT/infrastructure leadership, security, compliance, and vendor management. Hands-on technical work is expected.

Warehouse Assistant role involving loading, unloading, sorting, and palletizing goods. Responsibilities include precise picking and maintaining warehouse order. Requires experience in warehousing or logistics, familiarity with scanners, and proficiency in German or English.

Chief of Staff to structurally build company and org processes. Own strategic projects end-to-end, creating scalable ways of working. Requires 5-8 years in strategy & operations, fluent German/English, and interest in amateur football.

Senior IP Specialist contributes to IP portfolio development and protection. Responsibilities include managing IP negotiations, developing strategy, and monitoring competitive intelligence. Requires a Master's degree and 10+ years in technical IP management.

Junior Data Quality Analyst ensures data integrity for strategy recommendations by identifying errors and inconsistencies across datasets. This remote role involves cleaning data, verifying information, and documenting model logic.

Executive Assistant roles support senior investment professionals in a fast-paced environment. Responsibilities include intensive diary management, travel planning, and secretarial duties. Fluency in German and English is required.

Build and secure the supply chain for a deep-tech robotics company. Develop sourcing strategies, manage supplier networks for electronic components, and support production scale. Requires 3-6+ years in electronics procurement.