Rahul Kumar

GTM Engineer @ SIGN3 | Creator of AgentX (GTM AI Agent with Integrated AI-Based CRM on WhatsApp) | Market Research | Cold outreach Automation | Multi-Channel Outbound

SIGN3ex-Hashbyte Studio Pvt Ltdex-Elite Mindz Pvt Ltd.

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1 year ago, I was mass-sending cold emails and praying for Today, I've built the system that does it for

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At Sign3, we help banks and fintechs catch fraud before it happens. My job was supposed to be "run outbound campaigns." Instead, I ended up building AgentX is an AI outbound marketing agent that lives on WhatsApp. You text it like a colleague, "launch the NBFC campaign," "show me who replied today," "pull the interested leads into a spreadsheet", and it actually does it. Behind a simple chat interface sits 20k+ lines of code I wrote with the help of Claude, 12 API integrations I wired together, and a CRM I built from scratch tracking 10,000+ No React tutorials got me here. No bootcamp. I learned js, SQLite, API design, and deployment because the problem demanded it. Every bug at 2am, every tools API that returned a different shape than yesterday, every Railway deploy that wiped my data before I figured out persistent volumes, that's where the real learning What I'm most proud of: the team doesn't think of AgentX as "Rahul's side project." They use it every morning. The daily digest lands on WhatsApp at 8am. The CRM is where pipeline lives. It's infrastructure From email marketing to engineering the GTM stack, the title changed, but honestly, the obsession was always the same: make the pipeline predictable, and make the boring stuff disappear.