frontend developer English-speaking jobs in Sliedrecht

Drive new key account acquisition and business expansion across the Netherlands, Belgium, and Luxembourg, focusing on the construction machinery sector, particularly excavators. Lead the full sales cycle, from prospecting to deal closure, and build a strong customer base.

RF Systems Engineer to design, integrate, and support RF hardware systems across multiple bands for communication and sensing applications.

This part-time (12-16 hrs/week) Technical Support Officer role is based in Utrecht, Netherlands, and remotely. The ideal candidate will troubleshoot technical issues, maintain data workflows, assess customer credit limits, and support operational dashboards and applications. Requires strong JavaScript knowledge, SQL and PostgreSQL experience, and familiarity with Appsmith and Metabase.

As an Assistant Supervisor, you will coordinate daily warehouse activities, lead a team of 20-30 employees, and ensure smooth operations. You will monitor KPIs, prepare reports, and act as the operational point of contact.

Full-time video editor trainee in Amsterdam supporting post-production workflows, editing video projects, and collaborating with directors and producers.

Senior Mendix Developer leads hands-on development within Agile teams, ensuring scalable and secure solutions. Provides coaching to developers on best practices and collaborates with stakeholders to refine requirements. Drives innovation and adopts new ways of working, leveraging AI tools to accelerate development and improve processes.

Simulation Engineer needed to develop mathematical models and simulation environments for geolocation and tracking systems. Experience with sensor technology, MATLAB/Simulink, and a strong foundation in mathematics and numerical methods are required.

Creative Strategist to lead and build a team of video editors, designers, and UGC creators. Full ownership of creative strategy and execution across two DTC brands (beauty/skincare and supplements). Must have experience scaling brands to 8-9 figures, managing $50K+/day in ad spend, and a proven track record of success. Compensation is base salary + a percentage of ad spend.

Account Director to lead strategic growth and own high-level partnerships for a global semiconductor leader. Develop and execute long-term strategies, manage business operations, and build win-win partnerships at the executive level.

Research Engineer to execute experimental work on a batch pilot plant for solvent-based plastic recycling. Collect, log, and manage data, identify follow-up experiments, and report findings. Requires a degree in chemical engineering, process technology, or a related field with 3-5 years of pilot-scale R&D experience. Must be authorized to work in the Netherlands.

As an AI Workflow Automation & Optimization Intern, you will build and optimize AI-driven workflows across the organization. You will collaborate with the Product & Operations team to identify automation opportunities and design scalable solutions.

Warehouse Worker needed for part-time flexible hours (minimum 10 hours/week). Responsibilities include operating a forklift, receiving and putting away materials, picking and packing orders, and maintaining warehouse organization. Must be able to meet quality and productivity metrics and follow health and safety guidelines. Warehouse experience is desirable but not required.

Senior Quality Engineer provides leadership for continuous improvement of business processes, ensuring quality and GMP compliance for maintenance, engineering, and qualification activities.

Sales Manager to drive business development across the Netherlands, Germany, and Denmark. Experience selling engineered B2B products in marine, offshore, or energy markets required.

GMP Specialist needed for a newly established lentiviral vector production facility. Provide expert guidance on GMP processes, systems, and compliance. Lead deviations and root cause investigations, and coordinate internal and external audits. Bachelor's/Master's degree in Science, Engineering, or related field required. 2-8 years of experience in biotechnology or biopharmaceutical GMP manufacturing environments. Strong working knowledge of cGMP and quality systems. Excellent communication and influencing skills.

Leads a multicultural team to achieve exceptional warehouse operations in a semi-automated distribution center. Ensures operational efficiency, accuracy, and service levels. Develops and manages team performance, handles employee administration, and drives continuous improvement initiatives. Collaborates with other departments and stakeholders. Requires a Bachelor's degree in Supply Chain Management or a related field and 3-5 years of experience in a similar role.

Leads a team of 30 Floor Operators and Shoppers, ensuring smooth daily fulfillment operations. Monitors progress, optimizes processes, and collaborates with other managers. Coaches team members, conducts one-on-one development conversations, and handles administrative tasks.

Senior Front-end Developer with 15+ years experience needed. Expertise in Vue.js, TypeScript, and .NET (C#, ASP.NET Core) required. Experience with REST APIs, microservices, unit testing, OAuth authentication, and SQL Server.

Process Engineering Intern will support the engineering team in designing, analyzing, and optimizing production processes. Assist with process flow diagrams, heat and material balances, and equipment sizing. Collaborate with senior engineers on real projects.

Experienced Project Manager needed for end-to-end client implementations. Lead projects from tender phase through operational handover, ensuring successful transitions and stakeholder alignment. Manage budgets, timelines, and cross-functional teams. Bachelor's degree required, Dutch proficiency (A2 minimum), and proven project management experience.