Senior Full-Stack Engineer, Amsterdam

Search is changing rapidly with the rise of LLMs and AI-generated answers. Customers increasingly rely on AI to get answers. Traditional SEO is not enough anymore, and companies need new ways to understand how they appear and influence their visibility across AI systems.

At Promptwatch, we’re enabling companies to monitor, track and act on the future of search. We analyze how brands appear across AI responses, tracking citations, sentiment, and visibility at massive scale.

We are handling over 1.2k events per second, store over 30m prompt responses each month and have collected over 2.4 billion insights. Thousands of companies rely on what we build to make decisions and strategise every day.

This is a fast-moving, developing space and we’re leading it. We are a small, highly motivated, action-oriented team based in the center of Amsterdam, and what we’re building is delivering results. We’ve already seen revenue multiples achieved in 2026 and ambitious growth ahead.

The Role We are looking for a product-minded fullstack engineer with the following qualities: Strong knowledge of Typescript and the javascript ecosystem (reactjs, nodejs) Experience in designing and querying relational databases (sql, nosql) Experience building APIs (tRPC, REST) Familiarity with job queues, async processing, or event-driven architectureAbility to work across the stack and help shape both what we build and how we build it Ownership of features from development through deployment, ensuring they meet non-functional requirements such as scalability, security, and performance Familiarity with modern, AI-native development and the ability to use AI tools where they meaningfully improve speed, quality, or impactInterest in agentic workflows - pipelines that ingest, process, reason over, and act on large-scale data (prior experience is not required) Strong communication and collaboration skills, able to work effectively with a team of engineers to deliver high-quality solutions Nobody here knew the full stack on day one— curiosity and willingness to learn matter more than experience with every technology. What You’ll Do Take features from product ideation through implementation, deployment, and monitoring in production Build systems that are secure, scalable, and cost-effective, balancing technical and business requirements Deliver features used by thousands of customers every day, giving you real, tangible impactCollaborate closely with the team to ensure high-quality, maintainable, and reliable solutions You’ll love it here if you Are excited by the thought of working in a new and emerging industry Love challenges, learning and overcoming challenges at scale Excited to work in a fast-growing, high-impact space where product and engineering are tightly coupledInterest in AI systems, agentic workflows and modern development practices.

Compensation Base salary:€80,000 - 110,000 Benefits A top of the range Macbook Pro Office in central Amsterdam with a hybrid setup that trusts you to manage your schedule Direct influence on product and technical direction Regular team activities / socials