Senior Full Stack Developer - Node.js / TypeScript

TypeScript, Node.js & Integrations | Up to €90,000 a year | 32–40 hours Would you like to build scalable integrations and middleware used by major international brands? Join a fast-growing technology company where you will solve complex backend challenges involving high-volume e-commerce environments, real-time data flows and business-critical systems. About the company This international software company specialises in complex e-commerce solutions and system integrations for high-volume B2B clients across retail, manufacturing and distribution. Its client portfolio includes globally recognised brands such as Universal Music Group and Estée Lauder. The engineering teams build scalable Shopify Plus solutions and integrate them with systems such as ERP, WMS, POS and accounting platforms. Projects range from real-time inventory synchronisation and financial reconciliation to middleware for stores containing hundreds of thousands of products. The company has engineering teams in the Netherlands, Canada and Vietnam. Its Dutch headquarters are located in Rijswijk. Despite its international scale, the culture remains pragmatic, entrepreneurial and highly technical. Developers are trusted to take ownership, challenge existing approaches and introduce new technologies or working methods. You will have the opportunity to lead technical initiatives and contribute to the continued development of the engineering organisation. Recent projects include: Connecting Shopify Plus with ERP platforms such as NetSuite and SAPBuilding real-time product, pricing and inventory synchronisationDeveloping integrations for multi-region and high-SKU storefrontsCreating financial reconciliation tooling for accounting platformsBuilding internal developer tools and reusable NPM packagesSupporting and mentoring engineering teams across different regions Your role As a Full Stack Developer with a strong backend focus, you will design and develop reliable integrations, microservices and custom applications. You will work on the technical layer connecting e-commerce platforms to business-critical systems. Most of your work will focus on backend development with TypeScript and Node.js. Depending on your experience and interests, you may also contribute to frontend applications built with React and Remix. Your responsibilities will include: Designing, building and maintaining scalable backend integrationsDeveloping microservices, middleware and custom applicationsIntegrating Shopify with ERP, WMS, POS and accounting platformsWorking with TypeScript, Node.js, PostgreSQL, GraphQL and REST APIsImproving the reliability and performance of real-time data flowsContributing to the company’s monorepo, shared libraries and internal toolingParticipating in technical scoping, sprint planning and code reviewsCollaborating with international engineering teamsOptionally contributing to frontend solutions using React, Remix and Shopify PolarisTaking ownership of technical decisions and proposing improvements What you bring At least three years of professional experience as a backend or full stack developerStrong development experience with TypeScript and Node.jsSolid knowledge of PostgreSQL, REST APIs and GraphQLExperience building integrations, APIs or distributed backend systemsAn understanding of scalable software architecture and reliable data processingA proactive mindset and the confidence to take ownershipStrong communication skills and a collaborative working styleProfessional proficiency in EnglishResidence in the Netherlands and valid authorisation to work here What you can expect A gross annual salary of up to €90,000, based on 40 hours per weekThe option to work 32 or 40 hours per weekA remote-friendly and internationally oriented working environmentPerformance-based bonuses and incentivesOpportunities to travel to Canada and collaborate with international colleaguesStrong technical mentorship and clear opportunities for professional growthPlenty of autonomy and room to introduce new technologies and ideasChallenging projects for well-known international brands Interested? Would you like to learn more about the company, its projects or the engineering team? Send your CV to g.vanschagen@haystackpeople.nl