Promptwatch | https://promptwatch.com | Amsterdam, Netherlands | HYBRID/ON-SITE | Full-time | https://promptwatch.com

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Promptwatch helps companies track and improve their visibility in AI search /ChatGPT, Google AI mode and any other AI app. (GEO).

We handle 1,500/events/second, run millions of prompts a day, analyze them for brand mentions, sentiment, competitive intelligence, and help companies create and optimize content. We have the largest GEO insights platform with billions of prompts, responses, clicks, and mentions.

Work: Own app layer, real-time APIs & queues; ship end-to-end features.

Stack: TypeScript, React 19/Next.js, Node, tRPC, Postgres, GCP, Nice to haves: ClickHouse, Elasticsearch.

You: 8–9 YOE, strong TS/React/Node.

Comp: €90k–€110k + equity.

Apply: https://promptwatch.com/careers/senior-full-stack-developer-... (mention “HN: Full-Stack Developer”).