Vansh Vasishtha, Product Engineer

Experience

  • Product Engineer @Superfone

    Mar 2025 - Present | Bengaluru, India
    • Product Engineer across the stack on AI agents, WhatsApp messaging and CRM automation. I own features from data model and APIs to the interface, and stay with them after launch until they hold up in production.
    • Owned the product experience for AI agents that answer calls, chase leads and follow up on WhatsApp (AI Receptionist, AI Sales Agent, AI Caller Tunes), from onboarding and test calls to multilingual voices and AI avatars.
    • Built the AI training workspace, a WhatsApp-style chat where businesses teach their agent with text, voice notes, files and websites, with a review step that flags contradictory details before they go live.
    • Took the chatbot platform from scripted replies to CRM workflows. Designed the node-action model (lead stage, assignment, tags, notes, tasks) and a stateless simulator that runs the production engine.
    Next.jsReactTypeScriptNode.jsExpressPostgreSQLMongoDBTailwind CSSShadcn UI

What I've been building

Two tracks: a full-time product role building AI agents and messaging automation, and full-stack work after hours. Details are under NDA, so here's what I built, not whose it is. Each one has the story behind it, if you're curious.

Day job

AI voice agents

Frontend

The full product experience for agents that answer calls and chase leads, including a chat-style training workspace that flags contradictory details before they go live.

ReactTypeScript

Chatbots that run the CRM

Full-stack

Bots that move lead stages, assign agents, tag, write notes and create tasks, plus an in-canvas tester running the production flow engine.

ReactNode.jsPostgreSQL

A team inbox for WhatsApp

Full-stack

Private notes, assignment history, jump-to-message, catalog selling, pinned chats and WhatsApp calling, from the UI down to the telephony layer.

ReactNode.jsMongoDB

Campaign observability

Full-stack

Click attribution per broadcast, and the real reason behind every failed send instead of a silent drop.

ReactNode.js

After hours

Multi-tenant platform, web + mobile

Full-stack

Single-client web app to multi-tenant with a mobile app: monorepo, live-data migration with a leak test, hardened auth, push notifications.

Next.jsExpoPrismaPostgreSQL

Data pipelines that hold up

Backend

Fixed a Postgres import deadlock, moved imports to batched bulk inserts, and rewrote row-by-row jobs as set-based SQL.

PostgreSQLPrisma

Outreach engine

Full-stack

Multi-round email campaigns with domain warmup, plus a team CRM that tracks each lead through every stage.

Next.jsPrisma

Client sites & forms

Frontend

Multilingual marketing sites and intake forms with automated emails and generated PDFs.

Next.jsTailwind CSS

Projects

Case file · Referral HubRef ████
  • client:
  • users: marketers · intake · owners
  • runs on: web + iOS + Android
  • tenants: orgs, each one isolated
  • details:
Under NDA
Referral Platform · Web + Mobile
After hours
Web + Mobile

Referral Hub

  • A referral platform with separate flows for Marketers, Intake and Owners. It started as one web app for one client.
  • Now it's multi-tenant: org-scoped data rolled out behind a flag, a rehearsed backfill on live data, and a test that proves nothing crosses orgs.
  • And it's on phones: an Expo app that shares code with the web through a monorepo, with push notifications that open the right referral and over-the-air updates.
  • Auth rebuilt properly: cookie sessions, rate limiting, password reset and a fail-closed mode. Plus member imports and a payout module for the marketers.
  • PDF intake forms fill themselves from referral data. Details intentionally omitted — built under NDA.
Next.jsTypeScriptTailwind CSSPrismaPostgreSQLExpo
TrackLet
Personal Finance Tracker

TrackLet

  • My personal money babysitter — built because spreadsheets were judging me too hard.
  • InboxPilot does the data entry: a scheduled Gmail sync reads bank and card emails, parses the merchant, and one tap turns a transaction into an expense.
  • Cards that know their limits — track credit and debit cards, watch your "available balance" humble you in real time, and pay bills off right from the app.
  • Bills with reminders, a monthly budget and balance, and money-back entries so refunds stop wrecking the math.
  • Daily, weekly and monthly breakdowns with charts, so you see exactly where the chai money went. Spoiler: it's always chai.
  • Heads up: still on a Google test account, so the Gmail magic is invite-only — ping me if you want in. The manual side is wide open, go wild.
  • Still evolving — I ship a little something to it every week or so.
Next.jsTypeScriptTailwind CSSShadcn UIPrismaNeon
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What people I've worked with say

Real recommendations from teammates, mentors, and collaborators I've built alongside.

“Vansh is a powerhouse full stack developer. He delivered exceptional results on every project. Nothing ever slips through the cracks with him — he's always ahead of deadlines, on top of tech trends, and ready with a solution before most people see the problem. Hard working, sharp, and genuinely talented.”
Mukul Bharadwaj
Mukul BharadwajManager at GlobalLogicWorked with Vansh at a different company
“Vansh is someone you can always count on to get things done. He is hardworking, quick to learn, and approaches every challenge with a positive mindset. He consistently takes ownership of his work and is always willing to go the extra mile when needed.”
Vishal Dhiman
Vishal DhimanSoftware EngineerWorked with Vansh on the same team at Superfone
“I had the pleasure of working with Vansh during a hackathon where he was in his 4th year. His leadership and mentorship were outstanding. He managed our team with exceptional skill, ensuring that each member was engaged and contributing effectively. His ability to break down complex problems and explain them in simple terms made a significant difference.”
Chittanshu Singh
Chittanshu SinghData Science Intern @ CEATWorked with Vansh on the same team
“Vansh and I go way back — we've been college friends for the past 4 years, and I've had the privilege of working with him on all kinds of projects. The one thing that stood out from the very beginning was Vansh's sheer determination. No matter what he takes on, he approaches it with laser-sharp focus and an uncompromising attention to detail.”
Priyanshi Goyal
Priyanshi GoyalCo-founder, ThrdCup MediaStudied together
“'Ridiculously efficient' is the phrase that comes to mind when I think about Vansh. I was senior to him in college and we were interested in the same technology field. His ability to learn and grasp things astonished me. I still miss those Sunday mornings dedicated to fixing bugs along with tea — those sittings made me realise Vansh would be a great asset to any company.”
Deepak Mundhra
Deepak MundhraSoftware Engineer at Celebal TechnologiesWas Vansh's mentor
“Thanks a lot bro. You are a good learner as well, quickly adapting to the situation. I wish you a great career ahead! And keep learning and keep growing!”
Maaz Ahmad Khan
Maaz Ahmad KhanSoftware DeveloperWorked with Vansh on the same team at Superfone
“One thing I've always appreciated about Vansh is how he's always willing to help — I've reached out countless times with technical questions, career doubts, and learning challenges, and he's always been there. What makes him stand out is his ability to simplify complex problems and explain them clearly. Any team would benefit from someone as knowledgeable, dependable, and supportive as him.”
Aman Prajapati
Aman PrajapatiSoftware DeveloperMentored by Vansh on after-hours projects
“Vansh has a deep mind and is very keen about engineering as a whole, with an interest in all the edges of software engineering. He has a strong, active online presence and makes sure he's always up to date with what's happening across the world of engineering. My brainstorming sessions with him are always really good, a good engineer and a great team player.”
Kartik Yadav
Kartik YadavAgent • Infra • TelephonySenior to Vansh at Superfone

Still scrolling? Let's turn that curiosity into a conversation.

Come talk shop — system design debates, side projects at 2 AM, and the tech stack we all pretend not to hate. No resume. No referral pitch. Just builders being builders.

Let's Talk
“कर्मण्येवाधिकारस्ते मा फलेषु कदाचन।”

Focus on your work, not the reward.

— Bhagavad Gita(Chapter 2, Verse 47)