Hi, my name is Himanshu Deulkar
I'm the Developer.

Developed and owned end-to-end scalable Golang microservices for Puja, Chadhava, Astrology, Wallet, and Temple modules—powering features used by 10M+ global users through RESTful APIs, Redis caching, async workers, and PostgreSQL under a clean architecture.

Designed and optimized User Management System (UMS) and Content Management System (CMS)— revamped complex maker-checker flows into intuitive, streamlined workflows. Integrated LLM automation via LangChain to auto-fill entity data, improving internal efficiency by 50%.

Enhanced developer tooling, Redis caching, and CI/CD pipelines—implementing pipelining and concurrency-safe improvements that achieved 40% faster data access and 90% test coverage, while improving deployment stability by ~90%.

Optimized LLM prompt flows for Dify-based chatbots, improving both response quality and latency. Worked extensively with AWS (ECS, AppConfig, CloudWatch) and Grafana for deployments, observability, and performance tracking.

Collaborated closely with Android and BFF engineers to resolve production issues, co-design efficient APIs, and align backend logic with frontend needs—reducing cross-platform bugs and improving load times.

Led front-end development for an AI startup, creating a fully responsive website using React. Focused on engineering a site that delivered exceptional performance, design consistency, and cross-device compatibility.

Collaborated closely with backend and design teams to ensure seamless integration of features and efficient API communication. Delivered a high-quality, user-friendly product aligned with the company’s branding and user experience goals.

Strengthened my ability to deliver scalable, production-ready solutions in a fast-paced environment with tight timelines and evolving requirements.

Contributed to developing the frontend of a conference website using React, ensuring a responsive, accessible, and performant user interface.

Implemented backend integration using Node.js and Express for efficient API handling and dynamic content rendering. Focused on performance, scalability, and smooth user experience.

Collaborated with a cross-functional team to design and deploy a stable environment using Nginx, achieving a reliable and production-grade deployment setup.

With React, Node.js, Clarifai API, and PostgreSQL, I built a web application that revolutionizes the way you browse and view photos. Using the power of Clarifai API, my application allows you to easily identify and locate faces in your photo albums. With the intuitive React front-end and Node.js server, along with efficient data storage in PostgreSQL, this application provides a smooth and seamless browsing experience. As an added bonus, I used nodemon and Postman API to ensure reliable server performance. Whether you're an amateur photographer or a professional, this application is the perfect solution for anyone looking to organize their photos with ease.

As an aspiring professional, I have developed Food searching mobile application using React Native, Expo, and Firebase. This app allows users to register, log in, and search for restaurants in various locations. Users can save their favourite restaurants, view them on a map, and even make payments within the app. The project showcases my skills in frontend development using React Native, integration of Firebase for user authentication and data management, as well as creating an intuitive and engaging user experience. I am proud to have built this app to highlight my expertise in mobile app development and showcase my ability to create real-world applications.

An e-commerce platform was built with React for the frontend, Node.js and Express for the backend, and PostgreSQL as the database. The website offers two login options: user and seller. Upon logging in as a user, a product list is displayed with search functionality, the ability to add items to the cart, adjust quantities, and modify the user profile. Sellers can log in to add products, which are then included in the product list for users to browse and purchase.

The portfolio website showcases a clean, modern design and serves as a platform to highlight various projects and skills. Built with a focus on user experience, it features a responsive layout that ensures accessibility across devices. The site integrates seamless navigation, allowing users to explore different sections, such as project details and contact information. Although it currently does not support a dark mode feature, the design is optimized for readability and ease of use. The site is crafted to provide a comprehensive overview of work and achievements in a professional manner.

A website named Songify I developed using React, with Firebase integration for authentication and profile photo storage. After signing in, users are greeted by a homepage displaying various singer albums. Selecting an album reveals a list of songs, where users can listen to music, adjust the volume, skip tracks, and navigate to different timestamps using a progress bar, along with many other features.

Developed a Python-based lossless image compression tool using Run-Length Encoding (RLE) and Huffman coding. The system effectively reduces image file sizes without any loss of quality. RLE compresses repetitive pixel sequences, while Huffman coding optimizes the encoding of image data, resulting in a highly efficient compression process. This approach ensures the original image can be perfectly reconstructed, maintaining integrity while significantly reducing storage requirements.

A single page Application which is self made during learnig period exploring different features of React.js, React-hooks, React-redux, npm

I tried to make an instagram clone with the help of react and fastapi. Users can post the images and comment the post and for that user had to first login to do all that. They can logout also. This all users information are stored with the help of fastapi.

My first mobile application which act as a timer. We can set time, or there are some default timer too...Works as both, web application and mobile application, works on both ios and android.

The Spotify clone project is a web application created using HTML, CSS, and JavaScript that allows users to create playlists and listen to music online. The project features a home section where users can browse through various folders and select songs to play. The website resembles the popular music streaming platform, Spotify, with a simple and elegant interface. The Spotify clone project offers a great way to showcase your web development skills while providing users with a fun and interactive way to listen to music online.

The Space Game is a Pygame project where players target enemy spaceships with bullets to earn points. The game features multiple enemy spaceships that move across the screen and players must avoid being hit while making sure their own spaceship doesn't reach the bottom. The game ends when the player's spaceship reaches the bottom line, and a Game Over message is displayed. The game offers an entertaining way to test your Python and Pygame skills with engaging gameplay and smooth graphics.

Flappy Bird is a popular game recreated in Pygame, a Python library for game development. The objective of the game is to control a bird and navigate it through a series of pipes. For each pipe successfully passed, the player's score increases. However, hitting a pipe results in a Game Over message, and the game restarts. The Flappy Bird game project provides a fun and challenging way to test your skills in game development using Python and Pygame. With simple graphics and engaging gameplay, it's a great way to learn about collision detection, sprite animations, and more.

There are many small projects that I made throughout my learning phase and when I was just a starter...