java English-speaking jobs in Mainz

Senior Software Developer for Platform & Infrastructure Engineering. Focus on creating business logic for a new product line, including authentication and exposing infrastructure primitives. Requires backend/API experience and familiarity with IaaS stacks.

Intern in Inhouse Consulting to work at the intersection of AI innovation and operational transformation. Conduct analyses, benchmark technology, and support strategic solution concepts for a leading mobility company. Requires excellent Abitur, university enrollment, and fluency in English and German.

Chinese tutors are needed to help foreign students and adults improve their Chinese skills. This flexible, remote role allows you to choose your own schedule and teaching volume. A good level of Chinese and an ability to explain concepts are required.

Define product direction for shared mobile foundations, including navigation and app shell, for iOS and Android. Own strategy, roadmap, and outcomes while coordinating cross-team releases and technical trade-offs.

Own the end-to-end conference programme for global MedTech and HealthTech events. Research emerging tech, develop compelling content, and recruit high-calibre speakers across international summits.

Lead consumer service operations, managing inquiries, complaints, and returns. Oversee team performance, process improvement, and case handling using ticketing systems and SAP. Requires 3+ years in consumer service and leadership experience.

Shape and govern global compensation and benefits. Own salary structures, annual reviews, and incentive design. Partner cross-functionally to ensure competitive, data-driven reward practices.

Experienced Human Resources Generalist needed for a growing international organization. Manage the full employee lifecycle, provide guidance on employee relations, and ensure compliance with German employment legislation. Fluent German and English required.

Supply and Inventory Planner balances supply, inventory, capacity, and risk in external manufacturing. Translates demand plans into feasible supply plans and supports S&OP, ensuring inventory health and mitigating constraints.

QA Engineer to own the quality of an IoT/AI platform. Build and maintain end-to-end automation using Playwright, TypeScript, and Jest. Define test scope, integrate tests into CI/CD, and drive quality strategy.

Join a 10-month Graduate Analyst Programme in executive search. This role involves researching companies, mapping leadership, and engaging senior candidates. Native-level German and ambition are key requirements.

Solution Consultant partners with Sales to provide solution, industry, and business expertise. Responsibilities include solution demonstrations, building business cases, and understanding prospect needs. Fluency in German and English is required.

Senior CRM Manager to define and implement the overall CRM communication strategy. Responsibilities include orchestrating multichannel campaigns, building test-and-learn frameworks, and managing external partners. Requires strategic CRM campaign management experience.

Design and implement web applications for GlassFlow, the data infrastructure for AI agents. Requires fluency in TypeScript and frontend frameworks like React.

Support a major German HVDC transmission infrastructure project as a Site Administrator. Responsibilities include administrative tasks, reporting, coordinating site logistics, and managing office operations. Requires strong German and English skills.

Senior Development Engineer ASIC Characterization is responsible for characterizing mixed-signal ASICs, covering analog, digital logic, and high-speed interfaces. This role involves designing and executing measurement campaigns, debugging discrepancies, and automating workflows using Python and MATLAB.

Then Just Eat (Lieferando) might be the place for you. We’re a leading global online food delivery platform, and our vision is to empower everyday convenience. Whether it’s a Friday-night feast, a post-gym poke bowl, or grabbing some groceries, our tech platform connects tens of millions of customers with hundreds of thousands of restaurant, grocery, and convenience partners across the globe.

Lead Maintenance & Operations Supervisor for a new high-tech surface treatment plant. Responsibilities include ensuring operational stability, managing technical teams, and overseeing 24/7 operations. Experience with automated systems is key.

Account Manager-Healthcare oversees the medical provider network in Germany. This role manages key provider relationships, coordinates the provider lifecycle, and ensures compliance. Requires strong relationship management and proficiency in English and German.

Own partner health, performance, and strategy to drive pipeline and market expansion. This role manages the end-to-end partner lifecycle, developing GTM plans and coaching partners to achieve measurable business outcomes.