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Open to full-time, contract & freelance work

I build AI-powered web products.

Fullstack engineer working where product, AI and data meet — RAG pipelines and custom LLM agents, resilient scrapers that get past commercial anti-bot stacks, and interfaces that stay fast under load.

Shailendra Kumar
Fullstack · AI · Web ScrapingIndia
Experience
4+ years
Based in
India
Timezone
IST (UTC+5:30)
JavaScriptTypeScriptPythonHTMLCSSSQLC++RAG PipelinesCustom LLM AgentsPrompt EngineeringLLM API IntegrationReact.jsNext.jsVue.jsReduxShadCN UITailwind CSSChakra UINode.jsExpress.jsLaravelPostgreSQLMongoDBSequelizeMongooseAWS EC2S3GitHub Actions

01Experience

Where I've done the work.

A few of the places I've shipped software, and what actually changed as a result.

  1. Stumpmic AI

    Feb 2026 – Jul 2026

    Founding Lead Engineer

    • Joined as founding engineer to architect and build the company's core AI systems from the ground up, working directly with the founder on product direction.
    • Built a Python-based Retrieval-Augmented Generation (RAG) pipeline to power accurate, context-aware AI responses over large document sets.
    • Designed and developed custom AI agents to automate multi-step workflows, integrating LLM reasoning with internal tools and APIs.
    • Python
    • RAG
    • LLM Agents
  2. Freelance

    Jun 2025 – Feb 2026

    Web Scraping & Data Engineer

    • Built and operated three production financial-data scrapers — Nordic MFN, MarketScreener and Canadian SEDAR+ — on a single EC2 host under PM2, in TypeScript against MongoDB and S3.
    • Defeated three commercial anti-bot stacks — Radware Bot Manager, DataDome and Akamai — by matching client architecture to each defense: plain HTTP for one target, real headful Chrome for another, remote CDP browser sessions for the third.
    • Traced silent data loss to SEDAR+ binding document URLs to both session and exit IP: a rotating-proxy zone was saving 0 of 30 filings, and a persistent Browser API session restored full capture.
    • Ended a class of retry-budget failures by separating fatal from per-item errors, after one dead browser session failed 363 companies in a second and burned 299 backfill windows — adding session-death detection and a consecutive-failure circuit breaker.
    • Fixed a socket-listener leak that pushed a scraper past PM2's 1 GB ceiling into a restart loop, by routing through an explicit HTTPS proxy agent instead of axios' built-in proxy option.
    • TypeScript
    • Playwright
    • CDP
    • MongoDB
    • AWS EC2/S3
    • PM2
  3. TechStaunch Software Solutions

    Aug 2024 – Oct 2025

    Full Stack Engineer

    • Collaborated with cross-functional teams, including 5+ developers and 2 project managers, to deliver high-impact features that boosted release efficiency by 30%.
    • Implemented responsive and accessible UIs using TypeScript and Chakra UI, reducing UI-related bugs by 40% and improving user satisfaction scores.
    • Boosted SEO performance by 45% through structured metadata, canonical tags, sitemap setup, and image optimization, resulting in a 25% increase in organic traffic.
    • TypeScript
    • Chakra UI
    • SEO
  4. Masai

    Apr 2022 – Apr 2024

    Instructional Associate

    • Developed an Alumni Networking Platform used by 500+ students to connect with peers and alumni for mentorship, increasing user engagement by 60%.
    • Built a Resume Builder and Testing App using Node.js and React.js, helping 1,000+ users generate ATS-friendly resumes and improving resume acceptance rate by 35%.
    • Contributed to a Learning Management System (LMS) used by 1,000+ students, improving content accessibility and reducing student queries by 40%.
    • Node.js
    • React.js

Education & Credentials

  • Full Stack Development certificate from Masai School
    View Certificate

    Full Stack Development

    Masai School

    May 2022

    Certified
  • Bachelor of Arts certificate from CSJM University
    View Certificate

    Bachelor of Arts

    CSJM University

    June 2020

    Certified

02Projects

Things I've built.

Selected work, from AI platforms to full-stack products. Every card opens the live site.

www.linkedin.com/company/stumpmic-ai
Stumpmic AI website

Stumpmic AI

Architecting an AI-powered enterprise platform from the ground up, building a Python-based RAG pipeline and custom LLM agents that automate multi-step workflows across internal tools and APIs.

  • Python
  • RAG
  • LLM Agents
tigerwealthcapital.com
Tiger Wealth Capital website

Tiger Wealth Capital

Built a high-performance full-stack app using Next.js App Router, TypeScript, Contentful, and Supabase, achieving 20% faster loads with real-time data.

  • Node.js
  • PostgreSQL
  • Next.js
www.inkblotanalytics.com
Inkblot Analytics website

Inkblot Analytics

Built a scalable analytics platform with responsive UI powered by Tailwind CSS, Ant Design, and secure Stripe integration.

  • Laravel
  • Vue.js
  • React
  • Ant Design
  • Stripe
sedarplus.ca
SEDAR+ Filing Scraper website

SEDAR+ Filing Scraper

Private

Continuous scraper for Canada's SEDAR+ regulatory filing system, defeating Radware Bot Manager with remote CDP browser sessions. Document URLs bind to both session and exit IP, so a persistent session replaced the rotating-proxy zone that had been silently saving 0 of 30 filings — plus recursive date-window splitting to stay inside the ~450-row reachable result depth.

  • TypeScript
  • Playwright
  • CDP
  • MongoDB
  • AWS S3
marketscreener.com
MarketScreener Scraper website

MarketScreener Scraper

Private

Scraper for a paywalled financial news source behind Akamai, gated on the Sec-Fetch-* fetch-metadata quartet rather than User-Agent alone — so it runs on plain HTTP with client-hint versions locked to the UA string. A truncation detector compares the page's own JSON-LD wordCount against extracted text, catching HTTP 200 responses that returned only ~3% of an article.

  • TypeScript
  • Node.js
  • Akamai bypass
  • MongoDB
mfn.se
MFN Feed Scraper website

MFN Feed Scraper

Private

Fan-out scraper across ~1,600 Nordic company feeds per cycle at bounded concurrency, plus a 500-item firehose pass, deduplicated against MongoDB before persistence. Ratio- and streak-based Teams alerting pages on systemic failure while staying quiet through the transient resets expected at that request volume.

  • TypeScript
  • Node.js
  • MongoDB
  • PM2
test-resume.masaischool.com
Resume Builder website

Resume Builder

Developed a dynamic Resume Builder application enabling users to create and customize professional resumes with a clean, responsive interface.

  • Node.js
  • React.js
  • Chakra UI

03Services & Skills

What I can take off your plate.

Engagements usually fall into one of five shapes. The tools underneath are listed further down.

01

AI & LLM Engineering

RAG pipelines and custom agents that work against your real documents and tools, not a demo dataset.

  • RAG pipeline design
  • Custom LLM agents
  • LLM API integration
02

Web Scraping & Data Pipelines

Reliable extraction from sources that would rather not be extracted from — commercial anti-bot stacks, session and proxy strategy, and pipelines that keep running unattended.

  • Anti-bot strategy
  • Scraper build & hosting
  • Monitoring & alerting
03

Fullstack Product Build

End-to-end delivery, from an empty repository to something running in production with users on it.

  • Architecture & data modelling
  • Fullstack build
  • Deploy & handover
04

Performance & SEO

Diagnosing why an application is slow or invisible to search, then fixing the causes rather than the symptoms.

  • Profiling & audit
  • Core Web Vitals
  • Structured metadata
05

Interface Systems

Accessible, responsive component libraries that keep a product coherent as the team and surface area grow.

  • Component library
  • Accessibility pass
  • Documentation

04Toolkit

JavaScriptHTMLC++Prompt EngineeringPuppeteerAnti-Bot EvasionReact.jsReduxChakra UILaravelSequelizeS3RedisSendgridJiraPostmanCross-functional Collaboration
TypeScriptCSSRAG PipelinesLLM API IntegrationCDPDistributed ScrapingNext.jsShadCN UINode.jsPostgreSQLMongooseGitHub ActionsSocket.IOGitZenhubCursorProblem-solving
PythonSQLCustom LLM AgentsPlaywrightBright DataPM2Vue.jsTailwind CSSExpress.jsMongoDBAWS EC2StripeTwilioGitHubNotionClient Communication

04Global Footprint

Where I've delivered engineering work.

Production software, AI agents, and resilient data scrapers running across five key international hubs.

Drag to spin • Click country to focus
🇺🇸

United States

AI & Fullstack Engineering

Active Hub

Architected Python-based RAG retrieval pipelines, custom LLM agents, and high-performance Next.js fullstack web platforms for US clients and founders.

RAG PipelinesLLM ReasoningNext.jsPython

05Contact

Let's build something worth shipping.

Tell me what you're working on and where it's stuck. I read everything and reply within a couple of days.

Send an emailChat on WhatsApp

Elsewhere

Availability

  • Full-time
  • Contract
  • Freelance

Based in India, working across IST (UTC+5:30).

Résumé

Read the full version — always the latest copy.