Deepanshu is available for hire
Hire DeepanshuDeepanshu Shukla
Verified Expert in Engineering
Front-end Developer
Bengaluru, Karnataka, India
Toptal member since August 30, 2021
Bio
Deepanshu is a full-stack engineer with 13+ years of experience building scalable web, mobile, and desktop apps using React, React Native, Angular, Zustand, and Electron. He has back-end experience with Node.js, MySQL, and MongoDB, along with web scraping, AI/LLM workflows, CI/CD, Expo/EAS, and OTA updates. Deepanshu is an open-source contributor and creator of Zustify.
Portfolio
Investsky
React Native, Redux, Styled-components, Zustand, React Testing Library, Expo...
Observe.ai
React, Redux, Electron, HTML5, CSS, TypeScript, Antd, JavaScript, Architecture...
Serdar Gedik
React Native, React, APIs, Web Development, Mobile Development, iOS, Android...
Experience
- Software Design - 8 years
- JavaScript - 8 years
- CSS - 8 years
- HTML5 - 8 years
- React - 7 years
- Angular - 6 years
- Redux - 6 years
- ECMAScript (ES6) - 6 years
Preferred Environment
React, React Native, Zustand, Next.js, Expo, EAS Build, Claude Code, Node.js, AI Agents, MySQL, Mobile Design, UI Animation, UI Engineering, Mobile UI Design, Web Design, Real-time Data, WebSockets
The most amazing...
...projects I've worked on are a React Native repository and a Windows-based desktop app built using Electron and installed in over 300 systems.
Work Experience
Principal Software Engineer
2024 - PRESENT
Investsky
- Handled the complete ownership of a React Native mobile app for both Android and iOS.
- Performed SSL pinning to enhance the app's security.
- Upgraded React Native from 0.73.11 to 0.79.3. Migrated other libraries along the way.
- Developed many features, including animations and more.
- Built features and performance optimizations regularly.
Technologies: React Native, Redux, Styled-components, Zustand, React Testing Library, Expo, Mobile Design, UI Animation, UI Engineering, Mobile UI Design, PostgreSQL, Real-time Data, WebSockets
SDE3 Tech Lead
2020 - PRESENT
Observe.ai
- Assisted as a senior software engineer on multiple projects.
- Delivered an Electron-based desktop app for Windows that is currently installed in approximately 300 systems.
- Contributed to code reviews, standardizing coding practice, and performance improvement.
- Created a module for coaching and a form builder for automating the evaluation process.
- Mentored junior developers and provided guidance for starting their careers.
- Made technical improvements, such as implementing Sentry, FullStory, MIxpanel, Sentry-FullStory integration, and New Relic for measurement.
Technologies: React, Redux, Electron, HTML5, CSS, TypeScript, Antd, JavaScript, Architecture, Team Management, APIs, React Hooks, React Redux, HTML, GraphQL, User Interface (UI), GitHub, Software Design, API Integration, ECMAScript (ES6), Electronics, REST, Web Development, Web App Development, UI Components, Jest, Testing, Webpack, Front-end Architecture, Ant Design, Figma, Unit Testing, UI Design, Responsive Web Design (RWD), Axios, Tailwind CSS, REST APIs, Front-end Development, Full-stack, Expo, Mobile Design, UI Engineering
Cross-platform React Native Front-end Developer
2026 - 2026
Serdar Gedik
- Worked on the entire app end-to-end for both Android and iOS platforms using Expo.
- Built a design system to ensure easy and scalable changes in behavior and theme.
- Developed a Next.js web app hosted on Vercel for the customer side only.
Technologies: React Native, React, APIs, Web Development, Mobile Development, iOS, Android, Front-end Development, Expo, EAS, OtaUpdates, Tailwind CSS, Mobile Design, UI Engineering, Web Design
Software Development Engineer 3 (SDE3)
2022 - 2023
Dream11
- Set up a unit test framework, standardized code architecture, and migrated existing native screens to React Native screens.
- Resolved duplicate image problems within a large team and converted existing screens to a standardized format.
- Developed unit testing documentation and established a framework for unit testing.
- Worked on the fantasy gaming mobile app, understood the whole concept, and suggested a few changes as a user.
Technologies: React Native, React, Zustand, REST APIs, Node.js, React Query, Front-end Development, Mobile UI Design, Real-time Data
React Developer
2022 - 2022
Spin
- Worked on multiple small tasks, including improvements, for this mobility company.
- Tested unit cases using the Jest and React testing libraries.
- Gave suggestions for improvement in the deployment process.
Technologies: React, Jest, Mapbox, TypeScript 3, Material 2, CSS3, HTML5, Front-end Architecture, Figma, Unit Testing, UI Design, Responsive Web Design (RWD), Axios, REST APIs, Front-end Development, Microfrontends
React Developer
2021 - 2022
Toptal Client
- Worked as a contractor for approximately seven months for a customer in the eCommerce domain.
- Carried out performance improvements and fixed bugs.
- Implemented highly impactful new features, such as catalog filters, messaging, etc.
Technologies: React, Next.js, GraphQL, TypeScript, Material UI, Zustand, HTML, CSS, REST, Web Development, Web App Development, UI Components, Jest, Testing, Webpack, Front-end Architecture, Responsive, Storybook, Ant Design, Responsive Web Design (RWD), REST APIs, Front-end Development
Senior Front-end Engineer
2017 - 2020
Pharmeasy
- Began as the only front-end developer on the team and completed the order management system.
- Took end-to-end responsibility for designing, developing, and testing products.
- Created a POC in React Native for appointment booking and prescription handling for doctors in under two months.
- Oversaw the end-to-end development of Hustler for managing inventory within the warehouse using Angular and PrimeNG.
Technologies: Angular, JavaScript, TypeScript, HTML5, CSS, PrimeNG, APIs, HTML, User Interface (UI), GitHub, Software Design, API Integration, ECMAScript (ES6), React Native, Software, Software Design Patterns, React, REST, Web Development, Web App Development, UI Components, Webpack, Responsive, jQuery, Early-stage Startups, REST APIs, Front-end Development
Software Enginner
2015 - 2017
Paytm
- Worked on a consumer-facing dashboard for events in Paytm.
- Created a merchant onboarding platform in React Redux that merchants can use to onboard themselves on Paytm and generate QR codes.
- Revamped the whole website from Angular 1 to React.
Technologies: React Redux, React, Angular, Antd, HTML, CSS, REST, Web App Development
Experience
PivotBoost — B2B Lead Generation and Tenders Intelligence (Contract Work)
• Built 13 state-specific RERA scrapers (Maharashtra, Karnataka, Telangana, etc.) using Playwright with stealth mode, handling diverse HTML structures and JavaScript-heavy portals.
• Designed an LLM-powered data extraction system integrating Claude and Groq APIs with retry logic, enabling universal HTML→JSON parsing without hard-coded selectors.
• Implemented multi-source contact enrichment combining SERP API, Google Places, and web scraping with 100-point scoring algorithms for GST verification and contact quality.
• Built REST API integrations with 8+ external services (Tender247, UDYAM MSME, Birla Pivot CRM) for real-time data synchronization.
• Designed an LLM-powered data extraction system integrating Claude and Groq APIs with retry logic, enabling universal HTML→JSON parsing without hard-coded selectors.
• Implemented multi-source contact enrichment combining SERP API, Google Places, and web scraping with 100-point scoring algorithms for GST verification and contact quality.
• Built REST API integrations with 8+ external services (Tender247, UDYAM MSME, Birla Pivot CRM) for real-time data synchronization.
Dream11 Mobile App
https://www.dream11.com/A React Native Brownfield app where I worked on multiple aspects, from the bottom navigation to the side drawer, using React Navigation for navigation, and improved performance by moving the global state to an event-based store (Zustand). I then restructured the codebase to make it a monolith.
Observe.ai Sass Web Product
https://app.observe.ai/A web app used for performance evaluation and coaching of call center agents. As a front-end developer, I gathered requirements from the product managers and created the UI with React and Redux. I built multiple modules, including a coaching module, a form builder, and PCI account management. Additionally, I developed technology tasks to improve performance and code quality and migrated the product from JavaScript to TypeScript with Sentry integration for better debugging and error handling.
Real-time Code Sharing Platform for Web Developers
I created a persistent real-time code-sharing platform where you can share the URL with as many people as you want without the need to log in. It is currently in production. I completed all end-to-end design and development.
Desktop Screen Recorder
A desktop application built primarily for the Windows platform. It records the screen of the user's system for monitoring and quality management purposes. It is executable using Electron, and distribution is through Amazon S3.
WMS (Warehouse Mangement System)
A warehouse management system built using Angular and PrimeNG for maintaining medicine inventory and managing orders. It oversees inventory in the warehouse, barcoding, and location.
Marketplace App in React, TypeScript, and GraphQL
My latest Toptal client, where I worked on a marketplace for Boardgame and I worked on performance enhancement and bug fixes where I used the following technologies: Next.js, React, TypeScript, Node.js, and MongoDB.
Docon Mobile App
A mobile app built using React Native to book appointments with nearby doctors. I developed the app from scratch and used a Native base for the UI part of React Native.
Users can see all previous prescriptions, search nearby doctors, and book appointments.
Users can see all previous prescriptions, search nearby doctors, and book appointments.
Investsky
It’s a fintech mobile app built completely in React Native for the UAE/Dubai region. The main focus of the app is social investing, where people can share their investing strategies with others.
Skills
Libraries/APIs
React, Node.js, REST APIs, React Redux, jQuery, React Query, React Testing Library, Antd, PrimeNG, React Router, Material 2
Tools
GitHub, Webpack, Figma, Expo, Slack, Jira, Git, Bitbucket, Zoom, CodeMirror, Sentry, Babel, Claude Code, GitHub CLI
Languages
JavaScript, CSS, HTML5, ECMAScript (ES6), TypeScript, HTML, Sass, GraphQL, TypeScript 3, CSS3, Python
Frameworks
Redux, React Native, Angular, Electron, Jest, Ant Design, Remix, Next.js, Material UI, Tailwind CSS, Django
Paradigms
REST, Testing, Responsive, UI Design, Responsive Web Design (RWD), Microfrontends, Mobile Development, Desktop App Development, Mobile Design, Mobile UI Design, Unit Testing, Continuous Development (CD)
Industry Expertise
Web Design
Platforms
MacOS, Firebase, Software Design Patterns, Mapbox, iOS, Android
Storage
MongoDB, MySQL, PostgreSQL
Other
API Integration, APIs, Front-end, User Interface (UI), Web Development, Web App Development, UI Components, Front-end Architecture, Startups, Front-end Development, Software Development, Software Design, Architecture, React Hooks, Integration Testing, Axios, Early-stage Startups, Full-stack, Fintech, Mobile Apps, UI Animation, UI Engineering, Real-time Data, WebSockets, Loggly, Team Management, NativeBase, Software, Electronics, Zustand, Storybook, Styled-components, EAS Build, EAS, OtaUpdates, Desktop App, AI Agents
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