76 English-speaking jobs in Haarlem

Senior Growth Manager & Studio Lead will own and accelerate growth of the Music Studio, including the Piano App. Responsibilities include defining and executing GTM strategies, leading a cross-functional growth squad, and driving global acquisition growth, subscriber base growth, and LTV improvement. Must have proven experience in mobile app growth marketing, a data-driven mindset, and the ability to operate autonomously.

Software Tester ensures cutting-edge games meet international standards. You will receive on-the-job training to master the complete testing process.

Full-Stack Developer will work on software for both Motorsports and Active Sports domains, ensuring accurate athlete results. Requires Java, Springboot, and Vue.js experience. Strong English communication skills are needed.

The Math Analyst will conduct mathematical analysis to calculate return, odds, and volatility for games. Responsibilities include collaborating with test engineers, resolving math-related issues, and ensuring games meet quality standards.

Develop and maintain software tooling for event organizers and timers within the Active Sports domain. This role combines Java and PHP development, working with SQL databases and collaborating with a multidisciplinary team.

Build and grow AIMMS' partner ecosystem with a focus on partner-sourced revenue, co-selling, and partner enablement. Own a portfolio of implementation, consulting, and technology partners globally, assessing and managing their revenue potential.

Hardware Engineer needed for development of roadside traffic systems. Requires experience with electrical design, Circuit Board layout, AltiumDesigner, pre-compliance testing, and a programming language related to hardware. Must have strong English skills and a Bachelor's or Master's degree in a relevant field.

Iron Mountain seeks a Critical Facilities Technician for a full-time shift role in a 24x7 data center environment. Responsibilities include maintenance and oversight of critical electrical, HVAC, civil, and building management systems. The role requires strong attention to detail, organization, and the ability to follow safety procedures. Experience in a critical operations environment is preferred.

Finance Assistant will support the accounting team with financial administrative tasks, including invoice processing, financial statement preparation, and audit support.

Provides administrative support to the Sales team, including proposal drafting, CRM updates, report creation, and client communication.

Customer Success Manager Supply Chain will drive measurable business value by owning customer outcomes, renewals, and expansion. This role requires a solid understanding of supply chain concepts and 7-12 years of experience in post-sales roles.

Senior Backend Developer will design, build, and maintain microservices written in .NET 8, running on Azure. Responsibilities include writing clean code, collaborating on solutions, and ensuring software quality. Experience with microservices, .NET 8, SQL, and Azure is required.

As a senior technical point of contact, you will guide customers through the AIMMS platform, from pre-sales through onboarding and technical account management. You will translate customer requirements into technical solutions, lead demos and workshops, and ensure successful adoption of AIMMS.

Teamlead responsible for guiding orderpickers and riders, ensuring service, productivity, and safety. Leads by example and assists with inventory, equipment, hygiene, and onboarding. Requires managerial experience, preferably in logistics, retail, or catering. Must be available for at least 24 hours, including evenings and weekends.

Senior Quantity Surveyor needed for major European data center project. Manage cost control, subcontractor relationships, and client communication. Lead procurement, oversee subcontract packages, and provide strategic commercial guidance. Requires 8+ years' experience, Bachelor's degree in Quantity Surveying, and strong technical, financial, and people management skills.

Operationally-driven Grid Interconnection & Power Delivery Lead owns the end-to-end grid connection process for active data center projects. This role requires cross-functional leadership, coordinating with utilities and contractors to ensure reliable power delivery.