java English-speaking jobs in Mainz

Senior Sales Manager to drive the success of Tieto's Financial Services business in Central Europe. Lead strategic sales initiatives, build customer relationships, and expand Tieto's footprint in the Financial sector.

Execute daily accounts payable tasks including invoice booking, payment processing, and issue resolution. Ensure timely and accurate posting of invoices, payments, and adjustments while adhering to compliance requirements. Collaborate with internal and external stakeholders.

IT Security Consultant providing technical expertise to strengthen clients' security posture. Responsibilities include analyzing risks, developing security concepts, conducting assessments, and advising on standards. 2-4 years of experience in IT security, consulting, risk management, or related fields required.

Drive cross-functional strategic initiatives for Westwing Collection from ideation to execution. Analyze market trends, develop assortment and category strategies, and collaborate with design and product teams.

Develop, refine, and execute algorithmic bidding strategies for automotive and stationary energy portfolios. Manage trading positions, optimize SoC, and perform cross-market arbitrage. Collaborate with quants, analysts, and the tech team.

Financial Controller needed for an international school in Germany. Requires 'Geprüfter Bilanzbuchhalter' qualification or equivalent, 5+ years experience, and leadership of an accounting department. Must have strong technical accounting knowledge, fluency in German and English, and excellent communication skills.

Develop and implement customer account plans to achieve sales goals. Identify new opportunities and cultivate relationships with senior customer management. Provide business analytics and collaborate with sales, marketing, and technical support teams.

Provide customer support to small businesses and self-employed individuals in Finnish via phone, email, and chat. Possess strong communication skills and a passion for eCommerce, marketing, and print and design.

Working student supports the assessment and evaluation of new business opportunities in the pharmaceutical industry. Assists with market research, trend analysis, and business trip coordination. Requires enrollment in business studies, fluency in English, and proficiency in MS Office applications.

Lead an IC design and layout engineering team, translating market requirements into technical specifications. Manage, mentor, and develop engineers, ensuring project delivery against technical targets and schedules.

Finance & Administrative Manager (Part-Time) needed for a defense technology startup. Responsibilities include bookkeeping, financial administration, invoice processing, expense management, and administrative support. Requires several years of experience in bookkeeping, finance, or back-office roles, proficiency in DATEV or similar software, and fluency in German.

As a Founders Associate Intern, you will work directly with the business co-founder on company building, finance, processes, and hiring. You will expand and optimize sales structures, design and implement scalable processes, and own a signature project.

Senior HR Manager (EMEA) on a 12-month fixed-term contract, covering maternity leave. This role leads the end-to-end HR agenda across Germany, Switzerland, and Poland, reporting to the HR Director, EMEA.

Senior Paid Media Specialist will design, execute, and optimize paid media campaigns across social, search, display, and native channels. Responsibilities include managing media buying, aligning paid messaging with post-click experiences, and driving web sign-ups and app installs. Must have 5+ years of experience in digital marketing with a focus on paid media and hands-on expertise across Meta, TikTok, and Google Ads.

Product Owner/Business Consultant will support two strategic product initiatives: ONE360 and Harmonized Product Adoption Insights. Responsibilities include translating business needs into product requirements, managing the product backlog, and collaborating with stakeholders and development teams.

Experienced Financial Accountant needed for Travemünde office. Responsibilities include daily bookkeeping, financial reporting, and preparing financial statements. Must have strong Excel skills and experience with full-cycle accounting.

Junior Product Manager will design, develop, and maintain tracking implementations using web technologies. Translate business requirements into technical specifications and collaborate with engineering teams to integrate tracking logic. Validate tracking accuracy and build data pipelines for ingesting and enriching tracking data.

As an Enterprise Customer Success Manager, you will drive the adoption and expansion of the Mendix platform within assigned accounts in the DACH region. You will build and sustain customer relationships, develop account plans, and lead post-sales efforts to deliver consistent value. You will also act as a Mendix platform expert, providing guidance and best practices to customers.

Designs and delivers integrated energy solutions across Europe, partnering with sales and cross-functional teams to win projects.

Provides end-to-end technical support for hardware and software issues across various devices. Manages tickets, escalates incidents, and supports Microsoft 365, Azure AD, and other enterprise systems. Configures and manages devices using Intune, Jamf, and Snipe-IT.