java English-speaking jobs in Mainz

Experienced database professional needed for a major migration project from SAP HANA to PostgreSQL in a high-security IT environment. Responsibilities include analyzing existing database structures, designing and implementing PostgreSQL schemas, and developing migration scripts.

The Senior Systems Engineer, Co-Packaged Optics is responsible for working with customers and partners to understand product challenges, create system-level solutions, and drive design-in of Corning's Co-Packaged Optics (CPO) products. This role combines technical expertise in semiconductor manufacturing and photonic connectivity with a customer-facing orientation.

Aircraft Mechanic (m/f/d) needed for base and line maintenance, repair, and overhaul of Bombardier and Hawker-Beechcraft business jets. Responsibilities include troubleshooting, fault rectification, and documentation of work performed. Requires completed vocational training as an aircraft mechanic or comparable qualification and Cat A license is an advantage. Must have excellent English skills, be physically fit, and possess a valid driver's license.

The Republic of the Marshall Islands Investigations department seeks an experienced Marine Investigator to lead complex investigations of marine casualties involving Marshall Islands-registered vessels. Responsibilities include identifying root causes, developing safety recommendations, and producing reports aligned with international standards.

Senior Consultant to advise clients on supplier performance, logistics, and production efficiency. Drive end-to-end supplier management, identify process bottlenecks, and collaborate with client teams to implement lasting change.

Senior Operational Geologist needed for a full-time role at Vulcan Energie Ressourcen GmbH. Provide geological support for well delivery activities, including planning, drilling, evaluation, and reporting. Contribute to operations geology and wellsite geology activities, interfacing with drilling teams, contractors, and service providers. Prepare and contribute to operational reporting, including Daily Geological Reports and input to Daily Drilling Reports. Lead or support QA/QC and supervision of geoscientific evaluation activities. Ensure proper acquisition, handling, management, and documentation of geological samples, data, and reports. Contribute to the preparation and quality assurance of End of Well Reports (EOWR) and support post-well evaluation activities. Support tendering, technical evaluations, contractor management, and budgeting for mudlogging and formation evaluation services.

Solution Architect will define technical vision for core domains, ensuring roadmaps align with business goals. Deliver implementation-ready designs and mentor technical teams. Requires expertise in .NET, Azure, and modern architecture patterns.

Support inbound and outbound logistics at Søstrene Grene's Venlo warehouse. Responsibilities include receiving, storing, and shipping goods, performing stock checks, and maintaining a safe workspace.

Leads and executes national and international real estate transactions across EMEA, including acquisitions, disposals, lease negotiations, and property valuations. Manages and coordinates cross-regional real estate projects, focusing on headquarters requirements. Negotiates commercial, lease, purchase, and service agreements, conducts financial analyses and property valuations, and prepares decision papers for senior management. Ensures high-quality real estate data management, maintains reporting and portfolio documentation, and monitors KPIs.

Conducts due diligence investigations, analyzes financial statements, and assesses risks related to potential credit business. Participates in the formulation and execution of recovery plans, identifies and evaluates risks associated with loan restructuring, and prepares due diligence and risk assessment reports.

Senior Designer (m/w/d) with 8+ years experience in digital and offline marketing formats. Expertise in photography, retouching, and generative AI. Strong portfolio showcasing design excellence and channel agnostic execution. Fluent in German and English. Mastery of Photoshop, Illustrator, InDesign, and Microsoft Suite. Collaborate with clients and internal teams to develop creative concepts and execute designs across various marketing channels.

Senior Scientist Chemistry (m/f/d) will design, synthesize, and analyze novel glycan-based compounds. Responsibilities include performing reactions, purifying products, and documenting work. Requires a PhD, PostDoc in synthetic organic chemistry, experience in glycan synthesis, and 3-4 years of industrial experience.

Service Engineer needed for installation, repair, and maintenance of Injection Molding Machinery and related equipment. Responsibilities include troubleshooting machine failures, providing customer training, and submitting reports on service calls. Requires a Bachelor's degree in a relevant field or equivalent experience, proficiency in electrical and mechanical schematics, and fluency in English and German.

For our bilingual schools in Dreieich (near Frankfurt) as well as Frankfurt City we are looking for a School Counselor (in full-time or part-time).

Test Engineer (m/f/d) for Airbus Defence and Space in Manching. Responsibilities include preparing test activities, conducting ground tests, analyzing test data, and developing analysis routines. Requires a completed degree in Electrical Engineering, Aerospace, Mechanical Engineering, or a comparable field, work experience in IT/Information Systems, and fluency in English and German.

Senior Technical Consultant with 3+ years of experience configuring and implementing ServiceNow or comparable CRM platforms (e.g., Salesforce). Experience in CSM, FSM, or SOM required. Solid technical skills including XML, HTML, JavaScript, Web Services, and CSS. Ability to translate requirements into technical solutions. Fluent English and German required.

The Global Clearing Product Director will lead the EUR Clearing product strategy, development, and execution, driving revenue and market share growth. This role requires strong product management experience in the payments industry, strategic thinking, and the ability to manage complex initiatives.

Experienced Site Security Manager needed to lead security teams, oversee daily operations, and ensure compliance with security procedures in a datacenter environment.

Join our team and help deliver smiles! Assist with unloading, lifting, transporting, scanning, sorting, and diverting Amazon products. Must be able to speak basic German or English, follow safety guidelines, and be comfortable standing and lifting up to 15kg.

Experienced Head of Value Creation sought for project-based engagements with PE/VC-backed B2B SaaS, Software, and Services companies. Drive growth, profitability, and operational performance improvements. Proven track record of leading complex initiatives with measurable business impact. Fluency in English required.