Hi, I'm Hemant

Software engineer at WeLaunch AI. Product-minded full-stack builder.

I build SAT prep platforms, RAG tutors, and operations software with TypeScript, React, Next.js, and PostgreSQL. Open to strong product teams and cool collabs.

Download Resume

#TypeScript

#AI

#RAG

#SaaS

#FullStack

About

I'm Hemant Kumar, a full stack developer focused on product engineering, SaaS workflows, and practical automation. I like building systems that feel fast, clear, and useful.

My recent work spans user management, billing, APIs, queue processing, dashboards, and AI-assisted products. Most of my projects start with a real workflow problem and end with something production-shaped.

Right now I'm going deeper into scalable backend systems, strong frontend execution, and thoughtful product design. Always open to great teams and interesting builds.

Ships side projects that solve real problems

Open to SaaS and product engineering roles

Enjoys clean interfaces and clean APIs equally

Experience

Work that improved products, speed, and workflows.

Current

May 2026 - Present

Software Engineer

WeLaunch AI

Remote

Shipping production AI products and operations software across education, tutoring, field ops, and payroll — from SAT prep to RAG-powered tutoring and Cloud Run APIs.

> Built a production SAT prep platform end-to-end in TypeScript, React, and TanStack Start — adaptive lessons, diagnostic assessments, timed mock exams, progress analytics, and downloadable PDF reports on PostgreSQL/Supabase

> Designed and shipped Ava, an AI whiteboard tutor powered by a FastAPI RAG service with hybrid dense-plus-lexical retrieval over pgvector, citation-grounded answers, and SSE streaming for real-time tutoring

> Developed an internal admin console for curriculum, lesson, and quiz operations, including LLM-assisted SAT question generation, PDF/video ingestion, automated math-quiz verification, and student performance dashboards

> Engineered a Node.js/Express field-operations API on Google Cloud Run with Prisma and Better Auth, integrating FieldRoutes and Motive for identity matching, live GPS, scheduling, safety alerts, and real-time maps, with BigQuery analytics

> Delivered a Next.js payroll operations product with QuickBooks OAuth sync, overtime and leave workflows, ticket tracking, payroll-period reporting, and role-based access for technicians and admins

Jul 2025 - May 2026

Full Stack Developer

Attack Capital (YC-22)

India · Remote

Led AI product development on Healos — clinical note generation, voice agents, and email campaigning — from concept to production with a 3-person team.

> Led a 3-member team delivering 3 core Healos products: AI Scribe, AI Voice Agent, and an Email Campaigning Platform using OpenAI GPT, Gemini API, and LangChain

> Built real-time speech-to-text pipelines with Whisper and Deepgram, plus RAG pipelines with pgvector for context-aware note retrieval and semantic search across medical knowledge bases

> Engineered multi-step prompt chains for structured clinical summaries and designed a secure multi-tenant system with complete data isolation across clinics and clients

> Improved user engagement by 25%, reduced API response time by 25%, decreased UI bugs by 20%, and achieved 40% better performance under high load

> Cut script execution time by 45% via PostgreSQL query optimization, containerized the stack with Docker, and deployed on GCP with Grafana monitoring and database backups

Nov 2024 - Jul 2025

Full Stack Developer Intern

India Accelerator

Gurugram, India

Built and deployed RESTful APIs and containerized environments for a fast-moving accelerator, with a focus on query performance and reliable delivery.

> Built efficient RESTful APIs and improved database query performance by 20% through indexing, caching, and query refactoring

> Created Docker images and containerized deployment pipelines for reliable, reproducible environments

Jun 2023 - Jul 2023

Web Developer Intern

RT Map Tech Solutions

Jaipur, India · Remote

Developed responsive MERN-stack web applications, with a focus on adoption, performance, and cleaner user management.

> Drove a 15% increase in user adoption through improved usability and cleaner product flows

> Cut script execution time by 50% and improved user management efficiency by 30%

Projects

Things I've built and shipped.

~30% liftCheckout conversion

Featured Project

Global Price Comparison Tool

Node.jsPuppeteerExpressRedisMongoDBReact

Helps shoppers find the cheapest prices worldwide by scraping marketplaces, matching products, and surfacing the best deal before checkout.

Increased e-commerce checkout conversion by approximately 30%

View Project

Next.jsPrismaSupabase

GitHub Repo Tracker

Tracks public repos and sends updates for issues, PRs, stars, and releases.

Email alerts powered by Resend

View Project

ReactNode.jsPostgreSQL

Resume Expert

AI resume builder with role-aware suggestions, preview, export, and ATS-focused improvements.

AI-assisted resume generation

View Project

ReactNext.jsTailwind CSSGemini APISupabase

FormScratch

AI form builder that generates smart, dynamic forms from natural language, with branching, exports, and webhook support.

Lowered manual form creation time by approximately 80%

View Project

ReactNode.jsMongoDB

Job Cloud

A dual-role job platform for posters and seekers with profile management and resume uploads.

Recruitment workflow platform

View Project

Node.jsPuppeteerCron

Job Alert Bot

Scrapes listings and sends Telegram/email alerts based on role and location preferences.

Telegram + email automation

View Project

ReactTailwindshadcn/ui

Passkey

A lightweight password manager for local credential storage and fast retrieval.

Browser-first utility tool

View Project

Skills

Frontend, backend, AI, cloud.

Languages

JavaScriptTypeScriptPythonSQL

Frontend

React.jsNext.jsTanStack StartTailwind CSS

Backend

Node.jsExpress.jsFastAPIRESTful APIsPrisma ORMBetter Auth

Databases

MongoDBPostgreSQLpgvectorSupabaseBigQuery

AI & LLM

OpenAI API (GPT)Gemini APILangChainRAGPrompt Engineering

Cloud & Tools

GCP (Cloud Run)DockerGit/GitHubPostmanFigmaNotion

Resume

Hemant Kumar

Software engineer at WeLaunch AI. Experience across AI products, SAT platforms, RAG systems, and operations software.

> BTech in Computer Science · CGPA 7.0

> Shaheed Bhagat Singh State University

> Sep 2021 - May 2025

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Let's build something.

Open for product roles, freelance builds, and good engineering conversations. Let's talk.

kumarhemant9971@gmail.com