
Dhwrwm Basumatary
Verified Expert in Engineering
React Developer
Guwahati, Assam, India
Toptal member since June 12, 2026
Dhwrwm is a senior front-end engineer and technical lead with 10+ years of experience building complex web and mobile products. He specializes in React, Next.js, and React Native, with expertise in front-end architecture, performance, design systems, and complex product workflows. His full-stack experience across Node.js, NestJS, FastAPI, and PostgreSQL enables him to own features end-to-end while keeping front-end quality and user experience at the core.
Portfolio
Experience
- JavaScript - 10 years
- React - 10 years
- Front-end Architecture - 10 years
- Application State Management - 10 years
- UI Engineering - 10 years
- TypeScript - 8 years
- React Native - 8 years
- Next.js - 8 years
Preferred Environment
React, Next.js, TypeScript, Prisma, PostgreSQL, React Native, Node.js, NestJS, Redux, Tailwind CSS
The most amazing...
...system I've built manages the full rental lifecycle, from property discovery and pricing to bookings, payments, leasing, and internal operations.
Work Experience
Senior Full-stack Engineer (Front-end Lead)
Congdon & Coleman Real Estate
- Drove a 50% increase in booking revenue by leading the front-end transformation of complex rental workflows across property discovery, availability, pricing, and booking with React and Next.js.
- Architected and evolved React and Next.js applications powering vacation rental and real estate operations across listings, bookings, pricing, payments, and leasing, while owning the supporting APIs and back-end services.
- Reduced UI duplication by around 40% and accelerated feature delivery by building a reusable TypeScript design system with design tokens and Storybook, alongside shared front-end architecture in a Turborepo monorepo.
- Led a zero-downtime migration from legacy Vue to Next.js, establishing a scalable React architecture while preserving existing functionality and business continuity.
- Improved front-end performance and Core Web Vitals through production profiling, rendering optimization, caching, code splitting, and image optimization, reducing bundle size by around 45%.
- Streamlined the end-to-end rental process by integrating DocuSign, Stripe, Klaviyo, Segment, and Intercom Fin, connecting lease signing, payments, customer communications, analytics, and AI-assisted support.
- Owned booking workflows end-to-end across React and Next.js interfaces, back-end APIs, authentication, availability and pricing logic, database models, payments, and booking confirmation.
Senior Front-end Engineer
Inspify
- Improved luxury-brand digital shopping journeys by building polished React and Next.js experiences with TypeScript, responsive UX, and reusable component architecture.
- Expanded global customer reach by delivering localized, real-time consultation experiences using internationalization, WebRTC, Socket.IO, and embedded chat across virtual boutique screens.
- Increased consultation engagement by building interactive product discovery, pricing, and scheduling workflows that connected customers with luxury brand specialists in real time.
- Streamlined sales and concierge operations by building internal dashboards and contributing to NestJS APIs for lead management, scheduling, follow-ups, and operational workflows.
Front-end-focused Full-stack Engineer
Resumedone
- Built and evolved the core resume creation experience for a SaaS platform, delivering a highly interactive React and Next.js editor with real-time preview and reusable UI architecture.
- Improved usability, accessibility, and user experience through responsive, WCAG-compliant interfaces, reusable component patterns, and A/B testing of key product experiences.
- Increased confidence in critical editing workflows by introducing comprehensive automated testing with Jest and React Testing Library.
- Enabled reliable end-to-end product workflows by integrating the Next.js application with GraphQL and contributing to NestJS APIs across Apollo Client, PostgreSQL, and Prisma.
React Developer | UI Engineer
MaxKnowledge
- Modernized a legacy PHP application by leading its migration to React and Redux, establishing a scalable front-end architecture and component-driven development model.
- Expanded the platform with core product experiences, including discussion feeds, SkillBuilder learning modules, digital badges, portfolio management, and an online resume builder.
- Accelerated product delivery by building reusable UI components and front-end patterns across complex SaaS workflows while collaborating with product, design, and back-end teams.
- Improved front-end performance through profiling and Lighthouse audits, reducing bundle size by around 40% using Webpack tree-shaking, code splitting, bundle optimization, and efficient asset loading.
- Improved front-end reliability and release confidence by optimizing Redux state management and REST API integrations and establishing automated testing with Jest and Enzyme.
- Improved accessibility across the platform by implementing WCAG-compliant interfaces using semantic HTML, ARIA patterns, and screen-reader support.
Software Engineer
GeekyAnts
- Delivered production React and React Native applications across web and mobile for clients across multiple industries, adapting quickly to different products, requirements, and technical environments.
- Contributed to NativeBase, a React Native UI library with 20,000+ GitHub stars, improving foundational cross-platform components, design patterns, and accessible rendering.
- Accelerated delivery across multiple products by establishing reusable component patterns and front-end architecture practices with Redux, REST APIs, and responsive design.
- Improved engineering quality by contributing to architecture decisions, conducting code reviews, and mentoring junior developers.
- Strengthened client delivery through requirements gathering, technical planning, and regular stakeholder demonstrations.
Experience
Real Estate and Vacation Rental Platform
https://www.congdonandcoleman.comI owned end-to-end delivery of key features, including architecture, technical decisions, implementation, and deployment. I also improved performance and SEO through SSR, SSG, ISR, Redis caching, and front-end optimization, reducing bundle size by about 35% and improving Core Web Vitals across high traffic pages.
It was built with React, Next.js, React Native, TypeScript, Node.js, PostgreSQL, and Redis.
Career Readiness & Skill Development Platform
https://www.careerprepped.com/I played a key role in modernizing the platform by helping lead the front-end migration from a legacy PHP application to a scalable React and Redux architecture, improving maintainability and accelerating feature delivery. I also built core features, including discussion feeds, SkillBuilder learning modules, digital badge experiences, portfolio and profile management, and an online resume builder, as well as internal administration tools for content and platform operations.
I collaborated closely with product, design, and back-end teams to deliver reusable, accessible, and responsive user experiences powered by REST APIs. I also implemented testing and accessibility best practices that improved platform reliability, maintainability, and overall user experience.
AI-driven Resume & Career Development SaaS
https://resumedone.coAs a front-end engineer, I owned features from technical design through delivery, building responsive and scalable user experiences with React and TypeScript. I developed complex form-driven workflows, template customization, document management features, and integrated GraphQL APIs to support resume generation, user profiles, and content management.
I also collaborated closely with product and engineering teams to improve usability, optimize performance, and maintain a scalable front-end architecture that supported users across different languages, resume formats, and career stages.
Quit: Hypnosis to Stop Smoking – Mobile Health App
https://apps.apple.com/us/app/quit-hypnosis-to-stop-smoking/id1542520362I built production features with React Native, TypeScript, Redux, and Styled Components, delivering a polished experience across iOS and Android. I also developed the in-app audio player with background playback and intuitive controls, integrated RevenueCat for cross-platform subscriptions, and implemented push notifications and multilingual support.
Finally, I collaborated closely with design and back-end teams to deliver scalable, reliable, and maintainable mobile experiences, with a focus on reusable components, performance, and long-term user engagement.
Pregnancy AI Food Companion – React Native Mobile App
https://apps.apple.com/us/app/pregnancy-ai-food-companion/id6739027604My work included building production features with React Native, TypeScript, Redux, and Styled Components, delivering a polished experience across iOS and Android. I implemented secure networking with SSL pinning, integrated RevenueCat for cross-platform subscriptions, added multilingual support, push notifications, and Airtable-backed content management.
I also collaborated closely with product and back-end teams to deliver scalable, secure, and maintainable mobile experiences, with a focus on reusable components, performance, and long-term product stability.
Cityora – Food, Grocery, and Restaurant Booking Platform
Clay by MG - Next.js eCommerce Platform
https://www.claybymg.co.za/Education
Bachelor's Degree in Computer Science and Engineering
Jorhat Engineering College - Jorhat, Assam, India
Skills
Libraries/APIs
React, Node.js, REST APIs, React Redux, Stripe API, React Query, React Testing Library, Apollo Client, WebRTC, Socket.IO, OpenAI API, React Hook Form, Segment.io, React Router, Stripe, Playwright, Intercom API
Tools
Webpack, Prisma, Shadcn UI, Redux Thunk, Google Analytics, Git, Redux Toolkit, Sentry, Claude Code, Expo, TestFlight, GitHub Copilot, Codex, Jira, Claude, Astro
Languages
TypeScript, GraphQL, JavaScript, CSS, HTML, SCSS, Python
Frameworks
Next.js, Redux, React Native, NestJS, Express.js, Tailwind CSS, Jest, Alchemy
Paradigms
UX Design, Search Engine Optimization (SEO), Database Design, Mobile Development, Role-based Access Control (RBAC), REST
Storage
PostgreSQL, Databases, Redis, NoSQL, Amazon S3 (AWS S3)
Platforms
Vercel, Klaviyo, Amazon Web Services (AWS), Docker, Mixpanel
Other
Application State Management, Responsive UI, Axios, API Integration, Component Design, Server-side Rendering (SSR), UI Engineering, Full-stack Development, Multi-tenant SaaS, SaaS, APIs, Front-end Development, Web Development, Front-end, Front-end Architecture, Internalization, Storybook, Software as a Service (SaaS), Web App Development, System Design, Systems Design, Performance Optimization, Full-stack, Code Review, User Interface (UI), UI Development, Back-end, Architecture, CI/CD Pipelines, GitHub Actions, Zustand, Styled-components, i18n, DocuSign, Accessibility, A/B Testing, Accessible Rich Internet Applications (ARIA), Web Content Accessibility Guidelines (WCAG), NativeBase, Google Tag Manager, Database Schema Design, Dashboard Development, Monorepos, Turborepo, OpenAI, AI-enabled Search, AI-assisted Development, Mobile App Development, Agentic Coding, Push Notifications, In-app Purchases, Mobile Apps, Cursor AI, Design Systems, System Architecture, Data Modeling, LLM Integration, AI Agents, AI Tools, AI Integration, Large Language Models (LLMs), Intercom, Webhooks, FastAPI, Technical Leadership, User Experience (UX), Core Web Vitals, SEO Tools, eCommerce, Google Analytics 4 (GA4), Vite, Education Technology (Edtech), Leadership, Multi-tenant Architecture, Apollo, Segment, AI-generated Code, Software Architecture
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