Kumar Avishek | Full Stack Developer

Full Stack Developer, curious about how things work and why they matter.

About me

I'm Kumar Avishek, a Full Stack Developer with 3 years of experience building high-performance B2C and B2B SaaS products at scale.

Specialise in React, Next.js, and TypeScript on the frontend, and Node.js, NestJS, and PostgreSQL on the backend, with a track record of shipping end-to-end features that serve millions of users. Known for web performance obsession, clean architecture, and delivering measurable impact at every layer of the stack.

When I'm not building, I'm exploring how AI can be integrated into developer tooling, currently working on Elanifylabs , an AI-powered web performance auditor.

Work Experience

Full Stack Developer

The IT Guy

March 2025 - Present

Bengaluru, India

Frontend Engineer

OpeninApp

Aug 2023 - Dec 2024

Bengaluru, India

Selected Projects

Shoptik - eCommerce web app

A full-stack eCommerce project designed to sell furniture online

Indago - Job Tracking web app

A web-based job tracking application that allows job seekers to easily keep track of their job search progress.

Skills

Frontend

HTML, CSS, JavaScript, ReactJs, NextJs, Tailwind CSS, Shadcn, Radix UI, TypeScript, React Query, Redux Toolkit, Web Performance, Web Accessibility, Web Security

Backend

Node.js, Express.js, NestJs, MongoDB, PostgreSQL, Prisma ORM, mongoose, RESTful APIs, Strapi CMS

Testing

React Testing Library, Jest, Test Driven Development

Version control

Version Control, Git, GitHub, Gitlab, Bitbucket, GitHub Actions

miscellaneous

Google Analytics 4, Google Tag Manager, JIRA, Clickup

What People Say About Me

Nikunj Jain

Founder @ OpeninApp | 🏆 Forbes 30U30 | 👨‍🎓 IIT Delhi 2010

Bengaluru, India

I had the pleasure of working with Avishek as a Frontend Engineer at OpeninApp, and I can honestly say he was a valuable asset to our team. Avishek is a true professional with an exceptional work ethic and unwavering reliability. He's the kind of engineer you can always count on to deliver high-quality work on time.
One of Avishek's most impressive qualities is his ability to learn new things quickly and independently. He's always eager to expand his knowledge and explore new technologies.
Beyond his technical skills, Avishek is a simple, low-drama individual who is a pleasure to work with. He's self-motivated and possesses a "die-hard" attitude, always willing to go the extra mile to ensure project success. He's the kind of person you can truly "bank on" to get the job done.
On a personal note, Avishek is also a genuinely nice and honest guy. He's a pleasure to work with, and I'm confident he will be successful in all his future endeavors.
I highly recommend Avishek for any frontend engineering role. He's a talented and dedicated engineer who will be a valuable asset to any team. It was a pleasure working with him, and I wish him all the best in his future endeavors.

Arjun C

Ex-Product Designer @ The IT Guy

Bengaluru, India

I had the opportunity to work closely with Kumar during my time at The IT Guy, and it was a genuinely positive experience.
He is a highly skilled front end developer with a strong eye for detail and a deep understanding of how design translates to code.
I was consistently impressed by his ability to convert complex Figma designs into pixel perfect, responsive websites without losing the original design intent.
He is reliable, technically sound, and fast, making him a great partner to work with on fast paced projects.

Blog

Browser Internals: From URL to Pixels, Threads, and the GPU Pipeline

Master the pixel pipeline. A complete, detailed guide to browser rendering—covering Servicification, Layout reflows, Paint records, and Compositor tiles for better performance.

Scaling Beyond the Loading Spinner: How We Re-Engineered Our PDF Pipeline

From 10 Seconds to 200ms: How I Built a High-Speed PDF Generation Engine

Understanding Server Components in React (with Next.js)

Modern web development has evolved significantly, moving from client-heavy applications to more intelligent server-driven architectures

The Art of Web Interfaces: Crafting Delightful, Accessible, and Performant Experiences

Quick tips on building smooth, accessible, and user-friendly web interfaces

Get In Touch

I am currently available for work. Feel free to connect with me via email