Open to Work

Hey! I'm Aman Kumar Sinha

I'm a Frontend Software Developer.

I can build user-friendly Web Applications for you.

NextJS, ReactJs, NodeJS, ExpressJS, and MongoDB.

Hire Me View Projects

What I Do

These are the services I can provide to help bring your ideas to life

Front-End Development

Crafting interactive user interfaces using NextJS, React, HTML, CSS, and JavaScript.

Back-End Development

Building robust server-side applications with PHP, MySQL, EJS, Node.js, Express.js, and MongoDB.

Technical Skills

Technologies and tools I'm proficient with

ReactJS

Next.js

TypeScript

JavaScript

Redux Toolkit

Tailwind CSS

NodeJS

ExpressJS

MongoDB

Git

Github

PHP

SQL

Postman

C++

C

Bootstrap

HTML

CSS

My Resume

Download my resume to learn more about my experience and skills

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Work Experience

My professional journey as a Frontend Software Developer

Techymonks (Remote)|BuyBoxCartel (US Client)

Dec 2025 - Present

Frontend Software Developer

Tech Stack: React, TypeScript, Next.js 14, Axios, PostHog, Context API

Architected and built a drag-and-drop email template builder for BuyBoxCartel.com, a US-based real estate investment platform, with a custom rendering engine, content blocks, live preview, and JSON-to-HTML generation.
Led the migration to a new v2 RESTful API, integrating 150+ endpoints using Axios while modernizing reusable React components written in TypeScript.
Upgraded the application from Next.js 12 to 14.2, improving performance, maintainability, security, and Core Web Vitals.
Delivered 60+ production features and fixes across Marketplace, Messaging, Pipeline, Dashboard, Authentication, Affiliate, and Admin modules.
Integrated PostHog for analytics and feature flags, and implemented platform-wide Light Mode using React Context API.

Walsis eConnect India Pvt. Ltd.

Nov 2024 - Dec 2025

Frontend Software Developer

Tech Stack: React, Next.js, next-intl, RESTful APIs, Razorpay, PayPal

Built a scalable mock test platform for JEE and NEET aspirants with real exam simulations and detailed analytics.
Designed responsive website and dashboards for Sarthaks eConnect, improving usability and student engagement.
Integrated RESTful APIs along with Razorpay and PayPal payment gateways for secure online transactions.
Developed and deployed multilingual browser-based games using React for cloudz.fun, implementing internationalization with next-intl and supporting 21 languages for global users across desktop and mobile.
Improved application performance through lazy loading, code splitting, bundle optimization, and Lighthouse audits.

Khabai Tech, Hajipur

Jan 2024 - Nov 2024

Full Stack Software Developer

Tech Stack: HTML, CSS, Bootstrap, JavaScript, PHP, MySQL, phpMyAdmin, Git, GitHub, cPanel

Built and maintained 10+ dynamic websites and SaaS applications for clients across education, healthcare, and e-commerce.
Developed responsive user interfaces using HTML, CSS, Bootstrap, and jQuery.
Developed backend systems using PHP, managed databases with MySQL and phpMyAdmin.
Implemented user authentication, admin panels, contact forms, and lead generation modules.
Created custom CMS dashboards with user roles and role-based access control.
Used Git, GitHub, and cPanel for version control, deployment, and automated database backups.