Campfire
the-campfire.dev
Operating system for agentic software engineering with sessions, permission voting, replay and scheduled runs.
London-based founder building Campfire, Ephemeramail and HydraNode AI
Prasenjit Sarkar is a London-based founder and engineer who says he holds 15 patents and has written seven books. He now builds his own products, mostly around AI agents.
His projects include Campfire, an operating system for agentic software engineering with sessions, permission voting, replay and scheduled runs on your own infrastructure; Ephemeramail, a disposable email service for catching verification codes; and HydraNode AI, a practice-exam and study-guide site for AWS, Azure, GCP and CompTIA certifications, which is listed for sale on TrustMRR.
the-campfire.dev
Operating system for agentic software engineering with sessions, permission voting, replay and scheduled runs.
ephemeramail.com
Disposable email inboxes that catch verification codes and expire automatically.
hydranode.ai
AI-powered practice exams and study guides for IT certifications such as AWS, Azure and CompTIA.

InterviewK21Academy· 2022
Live, payment-provider-verified numbers for Prasenjit Sarkar's products are on TrustMRR: View on TrustMRR ↗
Prasenjit Sarkar builds AI and developer products, including Campfire for agentic software engineering, the Ephemeramail disposable inbox service and the HydraNode AI certification prep site.
As of October 2026 TrustMRR lists HydraNode AI as for sale, with about $145 in verified total revenue.
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