Rajat is available for hire
Hire RajatRajat Kapoor
Verified Expert in Engineering
Software Developer
Bengaluru, Karnataka, India
Toptal member since April 7, 2022
Bio
Rajat has been building web-based solutions for over seven years, working with numerous technologies best suited for solving particular problems. He also creates fun products like Android games, apps, Chrome extensions, and scripts to automate his day-to-day tasks. These projects have been the number one products on Product Hunt, and some are used by over 1,000 companies, including IBM, Salesforce, Gojek, and Toptal. His experience and skills make Rajat a great addition to any team.
Portfolio
Hashnode
Node.js, React, Next.js, Vercel, Amazon Web Services (AWS)...
Qwilr
MERN Stack, React, Slate, Less, Express.js, MongoDB, Node.js, TypeScript, HTTP...
Typeset
React, Socket.IO, Django, Flask, Node.js, PostgreSQL, MongoDB, Tailwind CSS...
Experience
- React - 7 years
- MERN Stack - 6 years
- Node.js - 6 years
- Software Development - 6 years
- TypeScript - 6 years
- Express.js - 5 years
- Amazon Web Services (AWS) - 5 years
- Next.js - 4 years
Preferred Environment
MacOS, Notion, Slack, Next.js, JavaScript
The most amazing...
...thing I've built is a Slack app that is used by more than 1,000 companies.
Work Experience
Product Engineering Lead
2022 - PRESENT
Hashnode
- Developed the Neptune Editor (https://hashnode.com/neptune), using which the bloggers can create rich text content faster in a Notion-like editor.
- Built a substack-like newsletter-related functionality into the product.
- Managed a team of six developers and coordinated with PM and CXOs to drive product development.
- Built a premium offering to monetize the product for writers on the platform by integrating with Paddle.
- Migrated a lot of old code from legacy frameworks to Next.js using TypeScript and deployed it on Vercel.
- Built the design system and component library to be used internally within the team to ensure design and feature consistency.
- Merged a lot of independent repositories into a monorepo to support code-reusability.
Technologies: Node.js, React, Next.js, Vercel, Amazon Web Services (AWS), AWS Cloud Development Kit (CDK), AWS Lambda, Lambda Functions, Serverless, MacOS, Notion, Software Development, MongoDB, Tailwind CSS, TypeScript, Docker, Amazon CloudFront CDN, JavaScript, Full-stack, Full-stack Development, Web Development, Architecture, FastAPI, Harness, LangChain, LangGraph, Technical Leadership, Large Language Models (LLMs), Python
Software Engineer
2018 - 2022
Qwilr
- Worked on the MERN stack written in TypeScript to develop new features for the state-of-the-art Qwilr editor and the whole platform. Established best practices for making an app scalable and fast.
- Built the content and user management features so that users could arrange their documents into a file system like a directory structure and add permissions for users and user groups for that content.
- Created interactive widgets for the WYSIWYG editor.
- Managed the customer relationship management (CRM) integrations, including HubSpot, FreshBooks, QuickBooks, and others.
- Ported a legacy codebase from CoffeeScript to TypeScript and migrated the UI from Angular to React.
- Worked in the core product team, brainstormed ideas, and led the implementation.
Technologies: MERN Stack, React, Slate, Less, Express.js, MongoDB, Node.js, TypeScript, HTTP, Web, Docker, JavaScript, CSS, Full-stack, Full-stack Development, User Interface (UI), JSON Web Tokens (JWT), API Development, Vercel, MacOS, Notion, Software Development, Amazon CloudFront CDN, Web Development, Architecture, FastAPI, Technical Leadership, Python
Software Engineer
2017 - 2018
Typeset
- Developed features for the research writing platform while working as a full-stack developer.
- Built end-to-end product features, including the architectural design, back end, front end, CI/CD, and infrastructure setup to support them.
- Created a reference management system and author's affiliation manager. Worked on analytics for the whole platform and collaborative writing using WebSockets.
Technologies: React, Socket.IO, Django, Flask, Node.js, PostgreSQL, MongoDB, Tailwind CSS, TypeScript, HTTP, Amazon CloudFront CDN, Web, Docker, SCSS, MySQL, JavaScript, CSS, Full-stack, Full-stack Development, SQL, User Interface (UI), JSON Web Tokens (JWT), API Development, MacOS, Software Development, MERN Stack, Express.js, Web Development, Web Scraping, Scraping, Architecture, FastAPI, Python
Software Engineer
2016 - 2017
Eltropy
- Integrated Eltropy with multiple partner APIs, including those that enabled us to build email and text messaging campaigns.
- Built a Dropbox-like multiplatform application for syncing Eltropy files using Electron with React.
- Created analytics that captured how much time users spend on each section of a web page.
- Implemented RabbitMQ-based messaging infrastructure.
- Deployed AWS EC2, DigitalOcean servers, and automation using Jenkins. Monitored website performance and security. Wrote the core business logic in the front and back end.
- Interacted with clients to decide on the product roadmap, timelines, and resource allocation.
Technologies: Node.js, Grails, Electron, Go, HTTP, Web, React, JavaScript, CSS, Full-stack, Full-stack Development, SQL, User Interface (UI), JSON Web Tokens (JWT), API Development, MacOS, Software Development, Web Development, Python
Experience
Timely — Slack App for Automatic Time Zone Conversion
Single-handedly created and marketed a free Slack app to convert all times in your messages into all relevant time zones. Designed to solve my problem of working in a highly distributed team. Installed over 1600 Slack workspaces, including Salesforce, IBM, Toptal, DraftsKing, Gojek, Capterra, and Slack. Finally, processed over 25,000 messages daily and monetized it to $200.00 MRR.
Mockly
Mockly is an easy-to-use ebook mockup generator. Perfect for generating simple 3d mockups for your info products and ebooks. With over 500 active and 25 paid users, and ended up being the number one "Product of the Day" on Product Hunt. Created, marketed, and monetized single-handedly.
RangeIT
https://tu-dresden.de/ing/informatik/ai/mci/forschung/forschungsgebiete/range-it?set_language=enWorked on the vision system of Range-IT Project to create a standalone, wearable, assistive device that processed stereo data in real time to extend the mobility of visually impaired people in an indoor environment. Captured the data using a 3D time-of-flight camera, filtered it using SoftKinetic's proprietary APIs, and analyzed using Point Cloud library using C++to detect stairs, walls, and doors up to a distance of seven meters
Display Engine for SimpleCV
Worked on creating an interactive rendering system for SimpleCV, which made it independent of the obsolete PyGame library. Developed the system using PyGTK and Cairo, along with a web counterpart compatible with IPython Notebooks using JavaScript and Processing.js.
Qwilr platform
https://qwilr.comQwilr is a B2B SaaS platform that enables companies to create beautiful and dynamic business documents and proposals. These proposals open up as web pages and have built-in interactive widgets that allow users to accept payments or signatures.
Ruby Science Foundation — Numerical Integration, Minimization and Matrix Multiplication Modules
http://sciruby.com/Worked on the integration, minimizations, and matrix libraries using Ruby and C++, adding more features and support for using GNU Scientific Libraries for faster computations. The project was implemented using C++ Ruby Foreign Function Interfaces.
Education
2011 - 2016
Master's Degree in Mathematics
Birla Institute of Technology and Science, Pilani (BITS Pilani) - Pilani, India
2011 - 2016
Bachelor's Degree in Electrical and Electronics Engineering
Birla Institute of Technology and Science, Pilani (BITS Pilani) - Pilani, India
Skills
Libraries/APIs
React, Node.js, API Development, Socket.IO, Slack API, Stripe
Tools
Notion, Slack, Amazon CloudFront CDN, Canvas, GTK+, AWS Cloud Development Kit (CDK)
Languages
Less, TypeScript, JavaScript, CSS, SQL, Python, HTML, SCSS, Go, Ruby, C++
Frameworks
Express.js, Django, Flask, Next.js, JSON Web Tokens (JWT), LangGraph, Electron, Grails, Tailwind CSS, Microsoft Kinect
Platforms
MacOS, Web, Docker, Vercel, Harness, Amazon Web Services (AWS), AWS Lambda
Storage
MongoDB, MySQL, PostgreSQL
Other
Software Development, MERN Stack, HTTP, Full-stack, Full-stack Development, Web Development, Web Scraping, Scraping, Architecture, FastAPI, LangChain, Technical Leadership, Large Language Models (LLMs), Mathematics, Slate, User Interface (UI), Cairo, Foreign Function Interfaces (FFI), Computer Vision, 3D, Point Clouds, Object Recognition, Lambda Functions, Serverless
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