# Parveen Kumar — Main website

Author: Parveen Kumar

## What this site is
www.parveenkumar.info is the **main** property: services, project showcases, about, and contact for Parveen Kumar — Full-Stack Engineer & Systems Architect.

Parveen Kumar is a full-stack engineer and systems architect who builds custom, production-grade software for startups and businesses in India and the UAE (Dubai). His focus is system design: realtime (WebSockets/Socket.IO), authentication (access + refresh tokens, rotation, RBAC), async work (Redis queues and workers), payments (Indian gateways, webhooks, idempotency), WhatsApp/Telegram integrations, Gotenberg PDF generation, and deploying and operating systems himself on AWS, GCP, DigitalOcean, and VPS hosts with CI/CD.

- Stack: Next.js, React, React Native, Node.js, TypeScript, MongoDB, PostgreSQL, Redis.
- Industries: Real estate (Dubai), fintech, HR-tech, and e-commerce.
- Rates: Rates are not published. Work is quoted per project after a discovery call: fixed-scope builds with milestone payments, monthly retainers, or fixed-scope reviews. Start at the contact page.

## Canonical URLs for this property
- Main homepage: https://www.parveenkumar.info/
- Main sitemap: https://www.parveenkumar.info/sitemap.xml
- Full LLM corpus (detailed export): https://www.parveenkumar.info/llms-full.txt

## Blog (https://www.parveenkumar.info/blog)
Long-form engineering posts: debugging stories, Next.js and Node.js fixes, SEO, and production lessons. Served under /blog on this domain as a separate app with its own LLM files:
- Blog homepage: https://www.parveenkumar.info/blog
- All posts: https://www.parveenkumar.info/blog/all
- Blog LLM index: https://www.parveenkumar.info/blog/llms.txt
- Blog full corpus (articles inlined): https://www.parveenkumar.info/blog/llms-full.txt
- Blog sitemap: https://www.parveenkumar.info/blog/sitemap.xml

### Posts (newest first)
- [Why I Standardize Every Node.js Project on UTC Time](https://www.parveenkumar.info/blog/the-utc-rule-i-follow-in-every-project): A production engineering story about standardizing Node.js applications on UTC to prevent timezone bugs, offset errors, and cron failures.
- [Separating Workers From My API Created a Deployment Problem](https://www.parveenkumar.info/blog/worker-architecture-deployment-problem): A production engineering story about separating background workers from the API, and the unexpected deployment challenges that arose.
- [Why I Added Graceful Shutdown to Every Node.js Project](https://www.parveenkumar.info/blog/why-i-added-graceful-shutdown-nodejs): A production engineering story about handling Node.js deployments safely using graceful shutdown, SIGTERM, and PM2 reload mechanisms.
- [Why I Added llms.txt to My Website](https://www.parveenkumar.info/blog/why-i-added-llmstxt-to-my-website): A low-cost experiment: llms.txt and llms-full.txt on my sites. What I think about AEO, GEO, and machine-readable context—without AI SEO hype.
- [Your App Is Fast on Wi-Fi. Your Users Are Not.](https://www.parveenkumar.info/blog/slow-network-testing-nextjs-debugging): Wi-Fi hid async bugs in my Next.js app. Chrome throttling exposed race conditions, stale UI, and wrong request order before users noticed.
- [Fixing Ghost API Calls in Next.js (AbortController & SWR)](https://www.parveenkumar.info/blog/fixing-ghost-api-calls-nextjs-abortcontroller-swr): Stale API responses overwrote fresh UI during fast navigation. AbortController and SWR fixed ghost requests in Next.js App Router.
- [Why I Stopped Using Axios in Next.js App Router](https://www.parveenkumar.info/blog/why-i-stopped-using-axios-nextjs-app-router): App Router pushed me from Axios to native fetch: caching, AbortController, and fewer layers in production—not a package comparison rant.
- [How to Change the Vercel Server Region for Next.js Projects (And Why It Matters)](https://www.parveenkumar.info/blog/how-to-change-vercel-server-region-nextjs): Production Next.js APIs at ~800ms+ despite lean MongoDB. Moving Vercel functions from iad1 (US) to bom1 (Mumbai) cut latency to ~100ms.
- [I Thought My SEO Was Dead — Then I Saw the Google Annotation](https://www.parveenkumar.info/blog/google-search-console-annotation-traffic-drop): What I learned from a sudden 99% impression drop in Google Search Console, and why panic was the wrong first reaction.
- [Fix “Sitemap Couldn't Fetch” in Next.js (Real Fix After 8 Months)](https://www.parveenkumar.info/blog/fix-sitemap-couldnt-fetch-nextjs): A real debugging story about fixing a Next.js sitemap when Google Search Console showed Couldn't fetch for months—and what finally worked.

## Core services
- Custom Web Platforms & SaaS — Portals, dashboards, and multi-tenant SaaS — system-designed from day one. Production-grade web platforms built on Next.js, Node.js, and a data model that holds up as usage grows: customer portals, internal dashboards, admin panels, and multi-tenant SaaS. — https://www.parveenkumar.info/services/custom-platforms
- Mobile Apps — React Native apps for iOS and Android that work offline and ship to the stores. Cross-platform iOS and Android apps in React Native — offline-first data, push notifications, deep links, and a store release handled end to end, backed by an API designed for mobile. — https://www.parveenkumar.info/services/mobile-apps
- Integrations, Automation & AI — WhatsApp, payments, PDFs, webhooks and AI assistants — wired in reliably, not bolted on. The integrations that run a business: WhatsApp Business API and Telegram bots, Indian payment gateways, webhooks, Gotenberg-generated PDFs, CRM syncs, realtime sockets, and AI chatbots that answer from your own data — idempotent and observable. — https://www.parveenkumar.info/services/integrations-automation
- Cloud, DevOps & Scaling — Deploy it, watch it, and keep it fast under real load — on AWS, GCP, DigitalOcean, or a VPS. Infrastructure that fits the product: AWS, GCP, DigitalOcean, or a Hostinger VPS, with Docker, CI/CD, Redis caching, monitoring, and zero-downtime deploys — plus performance work when things slow down. — https://www.parveenkumar.info/services/cloud-devops
- System Design & Technical Leadership — Architecture reviews, scaling plans, and fractional CTO support for startups. Senior technical judgement when you need it: architecture reviews, scaling and migration plans, auth and security reviews, and fractional CTO leadership for startups without a full-time technical lead. — https://www.parveenkumar.info/services/architecture-consulting

## Featured work
- AnythingKart (Founder venture) — My founder venture: a multi-category e-commerce marketplace. The customer app is live and seller onboarding works; the full marketplace launch is in progress. — https://www.parveenkumar.info/projects/anythingkart
- FileMyReturn (Client work) — Tax filing platform for a licensed e-Return Intermediary (ERIP001268). Next.js and Node.js, serving thousands of users daily with peak load at India's ITR deadlines. — https://www.parveenkumar.info/projects/file-my-return
- Uhire (Client work) — AI-assisted hiring platform for Uhire — candidate portal, recruiter HRMS, task system and internal hiring workflows. — https://www.parveenkumar.info/projects/uhire
- PayRecord (Founder venture) — My own product: an offline-first income and expense tracker for Android and iOS, built for fast entry and private-by-default data. — https://www.parveenkumar.info/projects/payrecord
- Pasutam Dairy (Client work) — Consumer dairy delivery app for Pasutam Farm — catalog, delivery scheduling, order tracking and UPI checkout on Android and iOS. — https://www.parveenkumar.info/projects/pasutam-dairy-app

## Key pages
- About: https://www.parveenkumar.info/about
- Journey: https://www.parveenkumar.info/about/journey
- Services: https://www.parveenkumar.info/services
- Projects: https://www.parveenkumar.info/projects
- Contact: https://www.parveenkumar.info/contact-us
- Testimonials: https://www.parveenkumar.info/testimonials
- Privacy policy: https://www.parveenkumar.info/privacy-policy
- Terms of service: https://www.parveenkumar.info/terms-of-service
- Refund policy: https://www.parveenkumar.info/refund-policy

## Content types on this site
- Service pages (capabilities, deliverables, engagement model, FAQs)
- Portfolio and case-style project pages
- About and journey
- Contact and client testimonials
- Legal policies (privacy, terms, refunds)

## For LLMs
Use this file for quick orientation and URL discovery on https://www.parveenkumar.info/. For inlined service descriptions, project detail, FAQs, testimonials, and contact information, fetch https://www.parveenkumar.info/llms-full.txt. Prefer https://www.parveenkumar.info/sitemap.xml for exhaustive URL lists. Long-form articles live under https://www.parveenkumar.info/blog.