100 English-speaking jobs in Haarlem

React Frontend Developer needed for a scale-up company. 5+ years of professional application development experience required. Fluent in React and experience building stable web applications is essential. Experience with Python or other server-side languages is a plus. Must have a good command of English.

Mendix Developer will enhance and rebuild the company's platform, translating innovative ideas into future-proof solutions. Requires minimum 3 years of Mendix experience, Mendix Advanced Developer certification, and a bachelor's degree.

Backend Developer to innovate scalable web platforms. Lead projects, collaborate with a global team, and design efficient backend systems. Expertise in PHP and cloud solutions is required.

Payments Data Analyst will collaborate with stakeholders, Payment Service Providers, and portfolio companies to enhance payments operations. Responsibilities include data analysis, pipeline development, and reporting. Requires 5+ years experience in complex environments, payments ecosystem knowledge, and proficiency in Python (especially PySpark, Pandas).

Certification Engineer needed for aircraft modification projects. Analyzes customer requirements, defines aircraft structures, and prepares certification documents. Requires HBO degree in engineering, 5+ years experience, and certification expertise.

Leads all engineering and maintenance activities at a pharmaceutical manufacturing site, ensuring reliable and compliant operation of equipment, facilities, and utilities. Develops and executes the site engineering strategy, manages budgets, and oversees change control processes. Collaborates cross-functionally to align engineering solutions with business needs. Requires 10+ years of experience leading engineering teams in a regulated industry.

Develop and maintain websites and applications, utilizing progressive technologies. Collaborate with backend developers to integrate APIs and services. Decipher designs and documentation to build layouts and interactive behavior.

Contribute to the development and improvement of a PHP-based payroll platform in an Agile team. Analyze requirements, implement solutions, and participate in code reviews. Guide other developers and collaborate on DevOps responsibilities.

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.

Design Engineer needed for mechanical and structural component development for landing gear systems. Requires 2+ years of experience, CATIA V5 proficiency, and a Bachelor's or Master's degree in Mechanical or Aerospace Engineering. Dutch nationality is required.

Drive profitable revenue growth through new business development and account management for the B-to-B market in the UK, Baltics, and Nordics. This role requires 2 years of international sales experience, a higher vocational education, and passion for active sports.

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.

Leads and develops a store team to achieve sales and service targets. Manages store P&L, budgets, and inventory. Ensures store operations and visual merchandising meet company standards. Recruits and develops talent.

Clean office spaces, hallways, and restrooms according to a schedule. Use provided cleaning supplies and collaborate with a small team. Adhere to safety and hygiene protocols. Must speak basic Dutch or English and be available full-time starting April 2026.

The Pricing & Market Access Director will develop and execute market access strategies for Vertex's CF products and prepare reimbursement strategies for beta thalassemia and sickle cell disease. This role will lead the adaptation of global value dossiers and economic models to meet country-specific HTA requirements and present them to authorities. The Director will collaborate with country colleagues to support reimbursement negotiation processes and manage external consultants.

Experienced Data Center Technician needed for on-site contract work in Haarlem, Netherlands. Responsibilities include hardware installations, cabling, server racking, troubleshooting, and documentation.

Mechanical Engineering graduate intern to support design, development, and testing of prototype mechanical systems. Must have a BSc/MSc in Mechanical Engineering, CAD proficiency, and a Dutch BSN number. This is a graduation internship requiring on-site presence in Haarlem at least 3 days per week.

Machine Learning Engineer needed to build and optimize ML models for large datasets. Apply rigorous scientific methods and advanced mathematical and statistical techniques to perform alpha research and model performance optimization.

Integration/XML tester to design, develop, and maintain automated test suites for integrations. Validate and test large messages, ensuring alignment with business and technical requirements.

Outside Sales Executive for Hästens, a global luxury sleep brand. Focus on strategic hunting, identifying and closing high-value accounts independently. Requires proven sales track record, mobility, and stamina. 80% field presence, uncapped commissions, and zero micro-management.