Hi, my name is
Sanjay Kumar
I build scalable web apps.
Software development engineer building scalable SaaS products. Led 14+ Shopify apps, 8+ live on the App Store. Currently driving e-commerce innovation at Qressy, supporting 1,000+ merchants.
About Me
Hello! I'm Sanjay, a Software Development Engineer passionate about building scalable, distributed systems that solve complex problems.
Currently spearheading innovation at Qressy, where I lead cutting-edge e-commerce solutions empowering 2,000+ merchants. I've architected and deployed 14+ production applications with hands-on experience across the entire development lifecycle—from conceptualization to deployment—demonstrating strong system design and problem-solving capabilities.
I excel at algorithmic challenges with 550+ DSA problems solved and a LeetCode Contest Rating of 1552, demonstrating strong problem-solving skills. My development approach emphasizes clean code, SOLID principles, and scalable architecture patterns to ensure maintainable, high-performance systems.
Here are a few technologies I've been working with recently:
- JavaScript (ES6+)
- Java
- React
- Node.js
- AWS (EC2, S3, Elastic Beanstalk)
- MySQL
Where I’ve Worked
Software Development Engineer @ Qressy
February 2024 - Present
- Developed and launched a successful SaaS jewelry management system, currently serving 600+ active clients
- Engineered 14+ custom Shopify applications using the Remix framework, enhancing e-commerce capabilities for merchants
- Designed and implemented RESTful APIs to facilitate seamless data integration and third-party service connectivity
- Deployed and managed applications on AWS, ensuring scalability and high availability
- Collaborated with cross-functional teams to deliver high-quality software solutions on time
Tech Stack
Frontend
Backend
Programming Languages
Databases
Cloud & DevOps
Development Environment
Some Things I’ve Built
Featured Project
Docusecure
A secure document storage web application where users can create accounts and safely store their important documents. Features user authentication using Passport.js and cloud storage integration with AWS S3 for reliable and scalable document management.
- Node.js
- Express.js
- Passport.js
- AWS S3
![Docusecure]()
Featured Project
Weather Point
A real-time weather information application that allows users to input area names and retrieve current weather data. Built using weather APIs for accurate and up-to-date meteorological information with a clean and responsive user interface.
- Node.js
- Express.js
- Weather API
- JavaScript
![Weather Point]()
What's Next?
Get In Touch
I'm currently open to new opportunities and exciting projects! Whether you have a job opportunity, want to collaborate on a project, or just want to say hi, feel free to reach out. I'll try my best to get back to you!