Hi, I'm Sunil 👋
Software Engineer & Mentor. I love building things and helping people. Very active on LinkedIn.
SB

About

A Software Engineer with 2.5 years of experience building scalable foundations for high-growth startups. I specialize in turning complex requirements into reliable, and user-friendly products. I am currently the lead architect for my company's internal boilerplate, where I define the technical standards followed by entire engineering team

Skills

React
Next.js
Typescript
Node.js
Prisma
PostgreSQL
AWS (EC2, S3, Lambda, SQS, API Gateway)
Docker
MongoDB
Redis
JavaScript
React Router
TailwindCSS
Redux
HTML
CSS
GraphQL
Material UI
Kafka
React Native
Problem Solving
Googling
Shadcn UI
NestJS
CI/CD (Github Actions)
Git
GitHub
AI Engineering

Work Experience

B

Byldd

August 2025 - Present
Full Stack Engineer
Byldd is a product studio that helps founders build and launch their MVPs. I was responsible for building and maintaining the backend and frontend infrastructure for various startups and the company's internal boilerplate.

🔹 Setting the Standard: Designed and developed the development of the company-wide Backend and Frontend Boilerplate, defining the architectural patterns and best practices adopted across all new client projects and reducing the development time by 15%

🔹 Generative AI & RAG: Engineered an AI chat system featuring Retrieval-Augmented Generation (RAG) and real-time streaming, enabling context-aware document interactions with highly responsive performance.

🔹 Financial Infrastructure: Developed end-to-end payment pipelines using Stripe Connect & Checkout, automating complex marketplace splits, platform fees, and refund processing.

🔹 Real-time Chat & Notifications: Built a low-latency messaging platform with group chat capabilities and a granular notification engine, increasing system engagement by 30%.

🔹 Referral System: Designed a scalable referral and rewards system with automated invite loops, driving a 10% increase in organic user acquisition**.

🔹 Cloud Management: Deployed and managed the servers of the projects on AWS, including ECS, S3, Lambda, EC2

🔹 Performance Optimization: Optimized system throughput by building advanced search and filtering tools, reducing database load and enhancing responsiveness for large-scale datasets.

🔹 Authentication System: Built a robust auth system from scratch, featuring Role-Based Access Control (RBAC), Two-Factor Authentication (2FA) and password rotation to keep user accounts secure and compliant with security standards.

S

Sharpener Tech

August 2024 - July 2025
Software Development Engineer
Sharpener is an Ed-Tech company that provides a platform for students to learn and prepare for software engineering interviews.

🔹 Optimized Database Performance: Indexed the entire database, reducing API response time by 90% and improving overall system performance and saved $600 per month.

🔹 Scalable Event Tracking System: Designed and implemented a data tracking system using AWS API Gateway, AWS Lambda, and SQS, capable of handling 9,000+ requests per second.

🔹 Code Assistant: Developed an AI-powered Code Assistant feature that helps users understand and resolve issues in their code using Google Gemini and OpenAI.

🔹 Cloud Migration: Led the migration of all servers from OVH Cloud to Microsoft Azure, enhancing reliability and scalability.

🔹 Dynamic Layout System: Designed and implemented a flexible layout system for both web and mobile dashboards, allowing admins to set layout for user based on conditions.

🔹 Referral System: Developed both frontend and backend for a comprehensive referral program, increasing referral-based sign-ups by 10% within the first 3 months.

🔹 Task Page Redesign: Revamped the task page UI/UX, reducing page load time by 45% and increasing user retention by 30%.

🔹 Dynamic Portfolio Generator: Developed and deployed a fully customizable portfolio generator on Snapit.tech.

S

Sharpener Tech

January 2024 - July 2024
Software Development Intern

🔹 Revamped Landing Pages: Redesigned and developed landing pages for Snapit and Evalit using Next.js and React.js, improving page speed by 40%.

🔹 Automated Meeting Scheduling: Integrated Google Calendar and Google Meet APIs, enabling seamless meeting scheduling automation, reducing manual scheduling time.

🔹 Enhanced Mobile UX: Redesigned the entire mobile dashboard using Tailwind CSS, reducing first contentful paint (FCP) time by 35% and improving mobile user engagement.

🔹 Integrated Chat Service: Implemented Sceyt Chat into the web app, enabling group chats and direct messaging with mentors.

🔹 Enhanced Learning Experience: Refactored the Assignments and Task backend structure, introducing a section-based structure to improve the user learning experience and engagement.

C

Cling Multi Solutions

December 2022 - March 2023
Software Development Intern

🔹 Worked with MERN stack technologies.

🔹 Developed REST APIs for backend services.

🔹 Participated in team meetings and provided status updates on project progress.

🔹 Developed websites using React.js & Next.js.

My Projects

Check out my latest work

I've worked on a variety of projects, from simple websites to complex web applications. Here are a few of my favorites.

Exclusive

Exclusive

Exclusive is a e-commerce application with the features of a modern online store. It allows users to browse products, add them to their cart, and securely checkout using Stripe. The application is built with a focus on performance and user experience.

React.js
Node.js
Express.js
Chakra UI
Typescript
MongoDB
TailwindCSS
Stripe
Cook Hub

Cook Hub

Cook Hub is a recipe exploring application built with React.js and Typescript. It allows users to search for recipes, view details, and save their favorite recipes. The application uses the Edamam API to fetch recipe data and provides a clean and modern user interface.

React.js
Typescript
Context API
HTML
CSS
JavaScript
Movie Flix

Movie Flix

Movie Flix is a movie discovery application built with Pure HTML, CSS and Javascript. It allows users to search there favorite movies and explore the statics of movie

HTML
CSS
JavaScript
PixStock

PixStock

PixStock is a Platform to explore and find high quality videos and photos.

HTML
CSS
JavaScript
Contact

Get in Touch

Want to connect? Send me a message on LinkendIn and

I'll reply as soon as possible!

You can also email me at dev.sunilbarewar@gmail.com

Looking forward to hearing from you! 😊