Anil is available for hire
Hire AnilAnil Kumar Rai
Verified Expert in Engineering
Front-end Developer
Hyderabad, Telangana, India
Toptal member since December 7, 2021
Bio
Anil is a software engineer with 12 years of experience specializing in React, Next.js, and Node.js development. He has created a wide range of applications and websites while working as an engineer for top-tier companies like Walmart, Tesco, ServiceNow, and Publicis Sapient. Anil works in a clear and organized manner, ensuring that projects are well-planned before he starts programming. He contributes exceptional value as projects progress from start to finish.
Portfolio
Maxwell Terry
Node.js, TypeScript, JavaScript, Supabase, Claude Code, Railway, React...
Justin Kim
TypeScript, PostgreSQL, React, Node.js, Express.js, GitHub, React Native...
Justin Kim
TypeScript, PostgreSQL, React, Node.js, Express.js, GitHub, Stripe, Stripe API...
Experience
- JavaScript - 13 years
- HTML5 - 10 years
- CSS3 - 10 years
- React - 7 years
- TypeScript - 6 years
- Node.js - 5 years
- Redux - 4 years
- Next.js - 3 years
Preferred Environment
MacOS, Slack, JavaScript, React, Visual Studio, Discord
The most amazing...
...thing I've built was an eCommerce site that allows users to buy, sell, rent, and bid on used products, combining versatility with media recognition.
Work Experience
Full-stack Developer
2026 - PRESENT
Maxwell Terry
- Hardened a white-label AI intake SaaS for personal-injury law firms from prototype to production-ready for its first paying customer, delivering a 6-phase engagement covering auth, chatbot safety, monitoring, compliance, and deployment workflow.
- Implemented multi-tenant firm scoping across a Node.js/Express.js back end by deriving firm_id from Clerk publicMetadata and scoping every query to the authenticated user's firm, securing all 6 Postgres tables without database-level RLS.
- Hardened public-facing AI chatbot endpoints with a domain origin allowlist, per-IP rate limiting, and zod input validation, and moved system-prompt construction server-side to eliminate prompt-injection and oversized-payload attack vectors.
- Built observability from scratch by wiring Sentry into the back end and dashboards, adding an /api/health liveness endpoint, and standing up 3 uptime monitors, cutting time-to-detect for production incidents.
- Shipped a 30-day contact-data purge job enforcing a PII retention policy, and completed a secrets/logs audit that removed personally identifiable information from intake logs and error traces.
- Diagnosed and fixed 3 production bugs surfaced in QA, including an auth gate that let admins bypass firm scoping and an /analytics endpoint that hung, freezing the page for every firm user.
- Established a staging-first branch and deployment model (auto-deploying staging/Railway, promoting to production via merge) and authored a promotion runbook enabling a non-technical founder to deploy safely.
- Root-caused a production intake-submission failure where AI-generated free-text dates crashed the database insert; moved completion detection and persistence server-side with a raw-capture fallback, so a completed lead can never be silently lost.
- Extended the AI intake to capture structured, attorney-ready data — conversation transcript, state-accurate statute-of-limitations deadline, and seven objective case indicators — persisted authoritatively server-side instead of via client regex.
Technologies: Node.js, TypeScript, JavaScript, Supabase, Claude Code, Railway, React, Back-end, Agile Software Development, Code Review, Technical Consulting, Software Architecture, Onboarding, IT Audits, Vitest, Problem Solving, MVP Design, Clerk, Optimization, Websites, Web App Development, Full-stack, Debugging, Chrome DevTools, Web Application Architecture, Artificial Intelligence (AI), Conversational AI, Agentic Coding, Clean Code, AI-assisted Development, Testing, Third-party APIs, Supabase Auth, Security Audits, Web Applications, English, JavaScript 6, Data Integrity
React Native Developer
2025 - PRESENT
Justin Kim
- Built a guardian-facing React Native CLI app (iOS and Android) sharing TypeScript types with the web app via a monorepo, using React Navigation, NativeWind, and React Query v5.
- Integrated Stripe PaymentSheet for one-time payments and autopay setup, charging guardians through the branch's Stripe Connect account via platform-level PaymentIntents and SetupIntents.
- Implemented silent JWT refresh, AppState-driven session restoration, and per-screen refetch-on-focus so financial and attendance data stays current after background transitions.
- Integrated Firebase Cloud Messaging for real-time guardian push notifications on attendance and billing events, with a dedicated notification screen and deep-link navigation support.
Technologies: TypeScript, PostgreSQL, React, Node.js, Express.js, GitHub, React Native, Stripe Payments, Stripe, Stripe API, Claude Code, Claude, Cursor AI, AI Tools, Security, Railway, Minimum Viable Product (MVP), ChatGPT, Agentic AI, Role-based Access Control (RBAC), AI Integration, Mobile UI, Software, Software Development, iOS, Mobile App Development, Auth, Component-based Development, Figma to React, Payments, Android, Mobile Apps, GraphQL, Database Schema Design, Payment APIs, Stripe Connect, QR Codes, Authentication, Cloud Deployment, GraphQL API, Deployment, JSON Web Tokens (JWT), WebSockets, Back-end, App Store Acceptance Process, Agile Software Development, Code Review, Technical Consulting, Software Architecture, Onboarding, IT Audits, Vitest, Design Systems, Shadcn UI, Problem Solving, Software Design, MVP Design, SQL, Optimization, Websites, App Store, Full-stack, Debugging, Artificial Intelligence (AI), Conversational AI, Authorization, Expo, Agentic Coding, Clean Code, AI-assisted Development, AI Architecture, AI Engineering, Testing, Third-party APIs, Security Audits, Web Applications, English, JavaScript 6, Data Integrity
Full-stack Developer
2025 - PRESENT
Justin Kim
- Architected a multi-tenant childcare SaaS platform using React, Express.js, PostgreSQL, and Drizzle ORM, supporting businesses, branches, classrooms, students, and split-household billing.
- Built a 3-tier automated billing engine—recurring, attendance-driven, and one-time invoices—using BullMQ job queues with Redis for async invoice generation and email notifications.
- Integrated Stripe Connect to onboard childcare businesses onto their own connected accounts, routing all payments through the platform with webhook-driven reconciliation for confirmations and failures.
- Implemented a multi-guardian autopay system using Stripe SetupIntents—supporting payer overrides, fallback restoration on guardian removal, and transactional email notifications to affected guardians.
- Built role-based access control with Passport.js session auth scoped per business, branch, and classroom; a separate JWT flow handles guardian access via OTP, password setup, and silent token refresh.
Technologies: TypeScript, PostgreSQL, React, Node.js, Express.js, GitHub, Stripe, Stripe API, React Native, Claude Code, Claude, Cursor AI, AI Tools, Security, Railway, Minimum Viable Product (MVP), ChatGPT, Agentic AI, Role-based Access Control (RBAC), AI Integration, Software, Software Development, Auth, Component-based Development, Figma to React, Payments, GraphQL, Database Schema Design, Payment APIs, Stripe Connect, QR Codes, Authentication, Cloud Deployment, GraphQL API, SaaS, Deployment, JSON Web Tokens (JWT), WebSockets, Back-end, Code Review, Technical Consulting, Software Architecture, Onboarding, IT Audits, AI-based Content SEO, Technical SEO, Vitest, Accessibility, Design Systems, Playwright, Shadcn UI, Web Content Accessibility Guidelines (WCAG), Scalable Architecture, Problem Solving, Front-end Architecture, Software Design, MVP Design, Billing, SQL, Optimization, Websites, Web App Development, Full-stack, Debugging, Chrome DevTools, Web Standards, Web Application Architecture, Artificial Intelligence (AI), Conversational AI, Webhooks, Authorization, Cloudflare, Agentic Coding, Clean Code, AI-assisted Development, AI Agents, Core Web Vitals, AI Architecture, AI Engineering, Testing, Third-party APIs, Security Audits, Web Applications, English, DNS, JavaScript 6, Software as a Service (SaaS), Data Integrity, Docker
[Low-Hour Audit] Full-Stack Developer (React/Node) for Bereavement Services SaaS
2026 - 2026
After Loss Services, LLC
- Eliminated cross-customer IDOR vulnerabilities across user-owned API endpoints in a multi-tenant SaaS platform, preventing authenticated users from reading or modifying other customers' records.
- Diagnosed and fixed a site-wide production login outage caused by schema drift, restoring customer access and shipping a boot-time schema guard that catches the same failure class at deploy.
- Migrated production database migrations from hand-written SQL onto Drizzle's generate/migrate flow, removing manual SQL authoring from the release process entirely.
- Built a CI guard that fails the build when a schema change ships without a matching migration, making the forgotten-migration outage class impossible to merge.
- Validated the migration cutover against a full production database copy of 303,119 rows across 90 tables, proving zero data impact before touching production.
- Added a PostgreSQL advisory lock to the migration runner, preventing overlapping deploys from applying schema changes concurrently.
- Added 21 missing foreign-key indexes across family and provider-marketplace tables after analyzing production table sizes to confirm no deploy-time impact.
- Consolidated a duplicate database connection onto the shared pool and added the module's first unit tests, contributing to a 699-test suite.
- Migrated a customer account between Clerk authentication instances, remapping production records to restore their access with no data loss.
- Authored handover and operations documentation covering environments, secret management, and production runbooks for the founding team.
Technologies: TypeScript, JavaScript, PostgreSQL, Stripe API, Express.js, React, Node.js, Full-stack, Full-stack Development, Stripe Connect, Stripe Connect API, Docker, Docker Compose, Supabase, Clerk, Auth0, OAuth 2, Testing, Third-party APIs, Supabase Auth, Security Audits, Web Applications, English, JavaScript 6, Software as a Service (SaaS), Data Integrity
Full-stack JavaScript/TypeScript Developer
2025 - 2026
Jotti Inc.
- Built and shipped full-stack features for a competitive gaming matchmaking marketplace, working across a Next.js and React front end and a NestJS and PostgreSQL back end, serving the core booking and matchmaking flow.
- Integrated Stripe and Braintree payment processing into the order and checkout pipeline, handling end-to-end transaction management for thousands of marketplace bookings.
- Engineered real-time presence, matchmaking, and chat experiences using Pusher and SendBird, delivering instant updates to users during live match sessions.
- Developed performant, responsive UIs in Next.js 14 and TypeScript, using TanStack Query for server-state caching to cut redundant API calls and speed up page loads.
- Deployed features through an automated CI/CD pipeline from AWS CodePipeline to CodeBuild to Amazon ECS, enabling fast and reliable production releases.
Technologies: JavaScript, Node.js, TypeScript, Next.js, PostgreSQL, Docker, CI/CD Pipelines, NestJS, Amazon Web Services (AWS), Redis, TypeORM, GraphQL, Database Schema Design, Payment APIs, Authentication, Cloud Deployment, Deployment, Back-end, Agile Software Development, Code Review, Technical Consulting, Software Architecture, Onboarding, IT Audits, AI-based Content SEO, Technical SEO, Vitest, Accessibility, Design Systems, Playwright, Shadcn UI, Problem Solving, MVP Design, SQL, Optimization, Websites, Web App Development, Full-stack, Debugging, Chrome DevTools, Web Standards, Web Application Architecture, Artificial Intelligence (AI), Conversational AI, Webhooks, Fastify, Twilio, Authorization, Cloudflare, Zustand, Agentic Coding, Clean Code, AI-assisted Development, Core Web Vitals, Testing, Third-party APIs, Security Audits, Web Applications, English, DNS, JavaScript 6, Software as a Service (SaaS), Jira, Data Integrity
Full-stack Developer
2025 - 2025
Adblast Media Inc
- Built a dashboard-integrated Split URL testing system enabling users to define traffic strategies and redirect rules for variant pages based on custom distribution settings.
- Implemented cookie and IP-based logic to recognize returning visitors and ensure consistent redirection to the same URL variant for reliable test outcomes.
- Added support for dynamic URL parameters to enable seamless tracking of purchases via Webflow, ensuring precise attribution for each split test variant.
Technologies: Node.js, TypeScript, React, Tailwind CSS, A/B Testing, Replit, Cursor AI, Responsiveness, Security, Minimum Viable Product (MVP), ChatGPT, Software, Software Development, Component-based Development, Figma to React, Cloud Deployment, Deployment, Back-end, Agile Software Development, Code Review, Technical Consulting, Software Architecture, Onboarding, IT Audits, Vitest, Accessibility, Problem Solving, MVP Design, Optimization, Websites, Web App Development, Full-stack, Debugging, Clean Code, Testing, Third-party APIs, Web Applications, English, JavaScript 6
Front-end React Developer
2024 - 2024
BB Projects, LLC
- Built two distinct, fully responsive landing pages in a tight timeframe of only four days, overseeing the initial setup and the development of reusable components.
- Developed a ticker component that automatically adjusts its width.
- Created a parallax effect where the background is a dynamic component rather than a static image. The component adjusts its height based on the content.
Technologies: React, Tailwind CSS, Next.js, JavaScript, Crypto, Blockchain, UI Animation, Shadcn, Web Design, Cryptocurrency, Responsive Design, Web Animation, Landing Pages, Web Development, Full-stack, JSON, Postman, cURL, API Testing, Web, Responsiveness, Security, Software, Software Development, Component-based Development, Figma to React, Database Schema Design, Authentication, Cloud Deployment, Deployment, Back-end, Code Review, Technical Consulting, Software Architecture, Onboarding, IT Audits, Vitest, Accessibility, Design Systems, Shadcn UI, Problem Solving, MVP Design, Optimization, Websites, Web App Development, Debugging, Chrome DevTools, Clean Code, Core Web Vitals, Testing, Third-party APIs, Web Applications, English, JavaScript 6
Front-end React Developer
2022 - 2024
Dapptopia, LLC
- Contributed to a DAO application for decentralized and autonomous governance called Citadel DAO, charged with UI component creation using Figma, feature implementation, and test case writing. Improved load performance optimization through work.
- Developed a UI design system based on MUI for usage inside the organization.
- Handled the BadgerDAO application. Developed UI components, worked on new feature updates, wrote test cases, and optimized application load performance and bundle size.
Technologies: React, CSS, TypeScript, Material UI, Test-driven Development (TDD), User Interface (UI), MobX, Storybook, UI Testing, Redux, Redux Thunk, Next.js, Node.js, Webpack, Babel, UI Development, ECMAScript (ES6), Data Visualization, Responsive UI, Pixel Perfect, Responsive Web Design (RWD), API Integration, JSON REST APIs, APIs, Front-end Development, REST, Responsive Layout, Front-end, Integration, GitHub, React Router, Axios, HTML, JSX, Figma, Agile, Chart.js, Google+ API, Mobile First, React Redux, UI Design, Tailwind CSS, Shadcn, Web3.js, Vercel, PostgreSQL, OpenAI, Architecture, Front-end Architecture, MongoDB, First Contentful Paint (FCP), Cookies, Responsive Web Apps, Performance, Scalability, Single-page Applications (SPAs), Vite, Progressive Web Applications (PWAs), Full-stack Development, CSS Modules, Design, UI Frameworks, UI Libraries, Back-end Development, Headless CMS, REST APIs, Crypto, Jest, Web3, Unit Testing, SEO Tools, CSS-in-JS, E2E Testing, XState, Blockchain, Web Design, Cryptocurrency, Forms, Responsive Design, Web Animation, Landing Pages, Web Development, Full-stack, CI/CD Pipelines, Webflow, JSON, Postman, cURL, API Design, API Testing, Web, Responsiveness, Security, Software, Software Development, Dashboard Design, Auth, Component-based Development, Figma to React, Payments, Database Schema Design, Authentication, Cloud Deployment, GraphQL API, Deployment, JSON Web Tokens (JWT), Back-end, Agile Software Development, Code Review, Technical Consulting, Software Architecture, Onboarding, IT Audits, Vitest, Accessibility, Design Systems, Shadcn UI, Web Content Accessibility Guidelines (WCAG), Problem Solving, Software Design, Billing, SQL, Optimization, Websites, Web App Development, Debugging, Chrome DevTools, Web Standards, Web Application Architecture, Webhooks, Fastify, Authorization, Clean Code, Core Web Vitals, Testing, Third-party APIs, Web Applications, English, JavaScript 6, Technical Leadership, Data Integrity
Senior Software Engineer
2021 - 2024
Walmart
- Involved in various designs and discoveries to identify the most optimal approach and solution to the requirement and document it.
- Collaborated with the team, product owners, and managers to ensure that software products were architecturally compliant and delivered on time.
- Provided mentorship and supervisory responsibilities to new development staff.
- Assisted the team with advanced troubleshooting and problem-solving.
- Optimized components for maximum performance across various web-capable devices and browsers.
- Involved in the complete software development lifecycle in an Agile environment, including technical design, hands-on coding, unit testing, performance tuning, maintenance, test automation, deployments, and upgrades.
Technologies: React, Redux, Redux Thunk, Redux-Saga, HTML, CSS, JavaScript, Node.js, Next.js, MongoDB, REST APIs, GraphQL, Create React App, React Native for Web, Jest, Unit Testing, React Testing Library, Azure Cosmos DB, Webpack, Babel, UI Development, ECMAScript (ES6), Responsive UI, Pixel Perfect, Responsive Web Design (RWD), API Integration, APIs, JSON REST APIs, Chatbots, Front-end Development, REST, Single Sign-on (SSO), Responsive Layout, OAuth, Front-end, A/B Testing, Analytics, Charts, Graphs, Dashboards, Full-stack, Tailwind CSS, React Native, Integration, GitHub, React Router, Axios, JSX, Figma, Agile, Chart.js, Google+ API, Mobile First, Mobile Development, React Redux, UI Design, Google APIs, Google Workspace, Google BigQuery, PostgreSQL, Architecture, TypeScript, Front-end Architecture, Prisma, MERN Stack, Drizzle ORM, First Contentful Paint (FCP), Cookies, Responsive Web Apps, Performance, Scalability, Single-page Applications (SPAs), Vite, Progressive Web Applications (PWAs), Full-stack Development, CSS Modules, Design, UI Frameworks, UI Libraries, Back-end Development, Headless CMS, Express.js, eCommerce, User Interface (UI), React Hook Form, Server-side Rendering (SSR), Google Analytics, SEO Tools, CSS-in-JS, E2E Testing, Database Architecture, Web Design, Forms, Web Components, Responsive Design, Web Animation, Landing Pages, Artificial Intelligence (AI), Web Development, Large-scale Projects, CI/CD Pipelines, JSON, Postman, cURL, API Design, API Testing, Web, Responsiveness, Security, Role-based Access Control (RBAC), Software, Software Development, Dashboard Design, Auth, Component-based Development, Figma to React, Payments, Amazon S3 (AWS S3), Database Schema Design, Authentication, Cloud Deployment, GraphQL API, Deployment, JSON Web Tokens (JWT), WebSockets, Migration, Back-end, CRM, Agile Software Development, Code Review, Technical Consulting, Software Architecture, Onboarding, Vitest, Accessibility, Design Systems, Playwright, Shadcn UI, Web Content Accessibility Guidelines (WCAG), Scalable Architecture, Problem Solving, FastAPI, Software Design, Billing, SQL, Optimization, Websites, Web App Development, Google Analytics 4 (GA4), Debugging, Chrome DevTools, Web Standards, Web Application Architecture, Fastify, Authorization, Expo, Clean Code, Payload CMS, CMS, Core Web Vitals, Testing, Real-time Systems, Third-party APIs, MongoDB Atlas, Security Audits, Web Applications, Real-time Computing, English, JavaScript 6, Jira, Technical Leadership, Data Integrity
Senior Associate
2019 - 2020
Publicis Sapient
- Created a complex reusable table capable of rendering hundreds of data seamlessly using the React virtualization library. It included column resize and fixed header, footer, and first column.
- Built many custom reusable components and libraries for the design system, including a table with multiple complex options, a toast library, and a bubble graph, which another team used in different applications.
- Mentored a team of four front-end developers by helping them with issues and approaches to integrate the changes within the application, keeping the application's architecture in mind.
Technologies: React, Redux, CSS3, HTML5, Storybook, Data Virtualization, Jest, Redux Thunk, HTML, CSS, JavaScript, Next.js, SCSS, TypeScript, Test-driven Development (TDD), Styled-components, Sass, Visualization, Create React App, Node.js, D3.js, SVG, SVG Animation, Git, Webpack, Babel, UI Development, ECMAScript (ES6), Data Visualization, Responsive UI, Pixel Perfect, Responsive Web Design (RWD), API Integration, JSON REST APIs, APIs, Front-end Development, REST, Responsive Layout, OAuth, Front-end, A/B Testing, Analytics, Charts, Graphs, Dashboards, Tailwind CSS, Integration, GitHub, React Router, Axios, JSX, Figma, Agile, Chart.js, Google+ API, Mobile First, React Redux, UI Design, Bootstrap, Google Cloud Platform (GCP), Front-end Architecture, MongoDB, MERN Stack, First Contentful Paint (FCP), Search Engine Optimization (SEO), Cookies, Responsive Web Apps, Performance, Scalability, Single-page Applications (SPAs), NestJS, Progressive Web Applications (PWAs), Full-stack Development, Design, UI Frameworks, UI Libraries, Back-end Development, Headless CMS, REST APIs, Express.js, User Interface (UI), Server-side Rendering (SSR), Unit Testing, Google Analytics, SEO Tools, CSS-in-JS, E2E Testing, Web Design, Forms, Responsive Design, Web Animation, Landing Pages, User Experience (UX), Web Development, Full-stack, Databases, CI/CD Pipelines, JSON, Postman, cURL, API Design, API Testing, Web, Responsiveness, Security, Role-based Access Control (RBAC), Software, Software Development, Dashboard Design, Auth, Component-based Development, Figma to React, Amazon S3 (AWS S3), Authentication, Cloud Deployment, Deployment, JSON Web Tokens (JWT), Agile Software Development, Code Review, Accessibility, Problem Solving, Software Design, Optimization, Websites, Web App Development, Debugging, Chrome DevTools, Web Standards, Web Application Architecture, Authorization, Clean Code, Core Web Vitals, Testing, Third-party APIs, Web Applications, English, JavaScript 6, Jira, Technical Leadership, Data Integrity
Software Engineer
2018 - 2019
Sykes
- Used an HTML5 canvas and howler.js to create an audio player with interactive control and sync with metadata for a reporting application.
- Set up the initial React application and migrated the reporting application. Used SVG and howler.js to create an audio player with custom controls and an HTML5 video player; synchronized them with metadata and created a custom visualizer.
- Developed a form generator such as Google Forms to create an application-specific form, which generated JSON data saved in the DB. This JSON was used in applications to render a form for user input.
Technologies: JavaScript, React, MobX, Redux, HTML5, CSS3, HTML, SVG, D3.js, Bulma, CouchDB, Node.js, Create React App, Visualization, CSS, SCSS, TypeScript, Sass, Redux Thunk, Jest, Data Virtualization, SVG Animation, Git, Webpack, Babel, UI Development, ECMAScript (ES6), Data Visualization, Responsive UI, Pixel Perfect, Responsive Web Design (RWD), API Integration, JSON REST APIs, APIs, Front-end Development, REST, Responsive Layout, OAuth, Front-end, Analytics, Charts, Graphs, Dashboards, GitHub, React Router, Axios, Docker, JSX, Agile, Chart.js, Google+ API, Mobile First, UI Design, Bootstrap, MongoDB, Search Engine Optimization (SEO), Cookies, GoDaddy, Responsive Web Apps, Performance, Single-page Applications (SPAs), Full-stack Development, Design, UI Frameworks, UI Libraries, Back-end Development, REST APIs, Express.js, User Interface (UI), NGINX, Unit Testing, Google Analytics, SEO Tools, Database Architecture, Web Design, Forms, Responsive Design, Web Animation, Landing Pages, Startups, User Experience (UX), Web Development, Full-stack, Databases, CI/CD Pipelines, Kubernetes, Docker Compose, JSON, Postman, cURL, API Design, API Testing, Web, Responsiveness, Security, Role-based Access Control (RBAC), Software, Software Development, Dashboard Design, Auth, Component-based Development, Amazon S3 (AWS S3), Authentication, Cloud Deployment, Deployment, JSON Web Tokens (JWT), Migration, Agile Software Development, Code Review, Problem Solving, Software Design, Optimization, Websites, Web App Development, Debugging, Chrome DevTools, Web Standards, Authorization, Clean Code, Testing, Third-party APIs, Web Applications, English, JavaScript 6, Jira, Technical Leadership, Data Integrity
Senior Developer
2015 - 2018
Freakcoders
- Developed an eCommerce application single-handedly to allow users to buy, sell, rent, and bid on second-hand products. The web app was featured in the business section of Gulf News on April 14, 2018.
- Mentored junior developers on many projects and helped them understand front-end technologies and design thinking.
- Developed numerous custom applications from different domains, including hotel booking, eCommerce, and experience booking.
- Connected with the clients and managed the front-end team, guiding and helping them develop CI/CD.
Technologies: JavaScript, React, HTML, CSS, PHP, Laravel, MySQL, AngularJS, Vue, Bulma, Redux, SCSS, Sass, Data Virtualization, Visualization, Create React App, CSS3, HTML5, SVG, SVG Animation, jQuery, Git, UI Development, Amazon Web Services (AWS), Responsive UI, Pixel Perfect, Responsive Web Design (RWD), API Integration, Stripe, Auth0, JSON REST APIs, APIs, Front-end Development, REST, Responsive Layout, Front-end, Analytics, Charts, Graphs, Dashboards, Full-stack, Integration, GitHub, React Router, Axios, Google+ API, Ionic, Mobile Development, UI Design, UX Design, Bootstrap, Angular, Search Engine Optimization (SEO), Cookies, GoDaddy, Stripe API, Responsive Web Apps, Single-page Applications (SPAs), Design, UI Frameworks, UI Libraries, Ant Design, Back-end Development, REST APIs, Express.js, eCommerce, User Interface (UI), Linux, NGINX, Jest, Backbone.js, Google Analytics, SEO Tools, Database Architecture, Web Design, Forms, Responsive Design, Web Animation, Landing Pages, Startups, User Experience (UX), Web Development, Databases, CI/CD Pipelines, Redis, Shopify, JSON, Postman, cURL, API Design, API Testing, Web, Squarespace, Responsiveness, Algolia, Facebook API, WhatsApp API, Role-based Access Control (RBAC), Software, Software Development, Dashboard Design, Mobile App Development, Auth, Component-based Development, Payments, Amazon S3 (AWS S3), Elasticsearch, Authentication, Cloud Deployment, Deployment, JSON Web Tokens (JWT), WebSockets, Cordova, Back-end, CRM, Code Review, Bitbucket, Problem Solving, Software Design, SQL, Optimization, Websites, Social Media, Web App Development, Maps, Google Analytics 4 (GA4), Debugging, Chrome DevTools, Web Standards, Web Application Architecture, Strapi, Webhooks, Authorization, Expo, Clean Code, Payload CMS, CMS, Core Web Vitals, Testing, Third-party APIs, Web Applications, English, DNS, JavaScript 6, Technical Leadership
Freelance Front-end Engineer
2014 - 2015
Dreamdays
- Managed the complete front end, created UI from the UX design, and conducted all functional changes, different API integrations, social API integration, and payment getaway integration.
- Contributed to improvising user experience for a different module such as slot booking on the cart page, checkout page, website main navigation, and creating a form for sellers.
- Oversaw the redesign of the application's different pages.
Technologies: JavaScript, HTML, CSS, jQuery, Social APIs, SCSS, Sass, CSS3, HTML5, UI Development, Responsive UI, Pixel Perfect, Responsive Web Design (RWD), Front-end Development, REST, Responsive Layout, Front-end, Integration, GitHub, Axios, UI Design, Bootstrap, GoDaddy, Responsive Web Apps, User Interface (UI), Linux, NGINX, Web Design, Forms, Responsive Design, Landing Pages, Startups, User Experience (UX), Web Development, Full-stack, JSON, Web, Responsiveness, Facebook API, Software, Software Development, Dashboard Design, Deployment, Problem Solving, Websites, Social Media, Web App Development, Debugging, Chrome DevTools, Web Applications
Experience
Split URL & Multivariate Testing Engine for Adblast Media
As a full-stack developer, I built and delivered a custom Split URL testing engine for Adblast Media Inc., designed to optimize native advertising performance. The system allowed marketing teams to define and manage tests directly from a dashboard, including support for base and variant URLs, traffic distribution strategies (e.g., 20%, 50%, 100%), and custom query parameters for purchase tracking with vendors like Webflow.
I developed a single test URL system that dynamically redirected users based on configuration logic and used cookies/IP tracking to ensure consistent routing for returning users. My work included building a flexible UI for test creation, implementing secure and accurate redirection logic, and enabling integration with third-party analytics and attribution systems.
This solution reduced manual setup efforts, improved conversion attribution, and helped the client run more effective A/B and multivariate marketing campaigns at scale.
I developed a single test URL system that dynamically redirected users based on configuration logic and used cookies/IP tracking to ensure consistent routing for returning users. My work included building a flexible UI for test creation, implementing secure and accurate redirection logic, and enabling integration with third-party analytics and attribution systems.
This solution reduced manual setup efforts, improved conversion attribution, and helped the client run more effective A/B and multivariate marketing campaigns at scale.
Landing Page for Nomic.io
https://nomic.ioDeveloped two unique, fully responsive landing pages within a stringent deadline of just four days, managing the initial configuration and creating reusable, interactive elements. The project included complex features such as a ticker component that automatically adjusts its width and a parallax effect where the background is a dynamic element, not a static image. This component dynamically alters its height depending on the content.
eBTC Finance
A Next.js-based financial portal that enables users to borrow BTC against ETH.
Initially, my role involved adding new features to enhance the portal's functionality and user experience. As the project evolved, I took on the significant task of migrating the application from Next.js version 12 to version 14, ensuring seamless updates and integration of new features. Additionally, I transitioned the styling framework from SCSS to Tailwind CSS, resulting in a more efficient and modernized styling process. Furthermore, I incorporated Shadcn/ui for component development, which significantly improved the overall design and usability of the portal.
Initially, my role involved adding new features to enhance the portal's functionality and user experience. As the project evolved, I took on the significant task of migrating the application from Next.js version 12 to version 14, ensuring seamless updates and integration of new features. Additionally, I transitioned the styling framework from SCSS to Tailwind CSS, resulting in a more efficient and modernized styling process. Furthermore, I incorporated Shadcn/ui for component development, which significantly improved the overall design and usability of the portal.
BadgerDAO
https://badger.comA Next.js and Netlify CMS-based app. I implemented new UI changes, performed code cleanups, upgraded dependencies to the latest versions, and optimized webpage load performance.
BadgerDAO App
React-based application focused on providing users access to smart contracts developed and maintained by BadgerDAO. I was the front-end developer and liaised with the back-end developer to integrate services for different major features like yield-bearing rewards, deposit, withdraw, and governance portal.
Citadel Component Library
A React-based design system based on MUI. It was a collection of reusable components, guided by clear standards, that can be assembled together to build any number of applications. I was responsible for creating it from scratch and creating different components based on design guidelines.
Citadel DAO
A React-based application focused on providing users access to smart contracts developed and maintained by Citadel DAO. I was the front-end developer and liaised with the back-end developer to integrate services for different major features like swap, leaderboard, and treasury.
eCommerce App
I developed a scalable and feature-rich eCommerce application from scratch using Next.js, designed to support three distinct user roles: admin, seller, and buyer, each with a dedicated dashboard. The admin dashboard enables comprehensive platform management, including category creation, user and product approval, review moderation, and many more features. The seller dashboard allows sellers to add and manage products, handle advertisements, and process orders efficiently. The buyer dashboard provides an intuitive interface for browsing products, placing orders, and tracking purchases. This project showcases my expertise in building modular, scalable systems with role-based access, delivering a seamless and efficient user experience across all functionalities.
Experience Booking Web App
https://www.dreamdays.aeDreamdays is a web application offering extraordinary experiences such as cruises, spa treatments, hotel accommodations, local excursions, and holiday travel packages.
I was the front-end developer and liaised with the back-end developer to integrate different APIs. My tasks were handling the complete front end, creating responsive UI, and performing API and payment gateway integration.
I was the front-end developer and liaised with the back-end developer to integrate different APIs. My tasks were handling the complete front end, creating responsive UI, and performing API and payment gateway integration.
Company Website
https://lwyd.in/The Look What You've Done company helps other companies build their brand, verbal and visual identity, and content.
I created a responsive web design and added several SVG animations from the provided design. I also integrated API to send contact and career information by email.
I created a responsive web design and added several SVG animations from the provided design. I also integrated API to send contact and career information by email.
Business Listing and Review Portal
I developed the complete front end, created different UI components from UX design, and implemented all functional changes, API integrations, and other third-party API integrations—weather and social.
Form Builder
A React and CouchDB-based web app was used to create and render a form with a drag and drop feature. The form builder was integrated with different internal web apps. After completing the form, the respective JSON was saved in DB, and later it was used in other web apps.
Analytics Dashboard for Customer Support Data
A React-based web app that listed and visualized processed data through machine learning and marked textual, audio, and video data. It had a section representing each recording's audio, video, and textual data, where users could interact and see the different marked areas of audio and video with metadata.
Education
2008 - 2012
Bachelor's Degree in Computer Science
West Bengal University of Technology - Kolkata, West Bengal, India
Skills
Libraries/APIs
React, Node.js, REST APIs, Stripe, React Router, Chart.js, Google+ API, React Redux, Google APIs, React Hook Form, Facebook API, WhatsApp API, Auth, Stripe Connect, GraphQL API, Playwright, D3.js, Stripe API, Backbone.js, Vue, jQuery, Social APIs, MobX, Web Audio, Redux-Saga, React Native for Web, React Testing Library, Web3.js, Stripe Connect API
Tools
Redux Thunk, Git, Figma, GitHub, JSX, Shadcn, Drizzle ORM, NGINX, Google Analytics, Postman, Claude Code, Claude, ChatGPT, Vitest, Shadcn UI, Bitbucket, MongoDB Atlas, Jira, Webpack, Babel, Auth0, Google Workspace, Prisma, Docker Compose, Expo, Create React App, Visual Studio, Wappler
Languages
HTML, CSS, JavaScript, SCSS, TypeScript, HTML5, Sass, GraphQL, ECMAScript (ES6), SQL, JavaScript 6, PHP, CSS3
Frameworks
Next.js, Redux, Jest, Material UI, Tailwind CSS, React Native, Bootstrap, Ant Design, JSON Web Tokens (JWT), Payload CMS, Ionic, Angular, NestJS, Express.js, Fastify, Laravel, AngularJS, Bulma, OAuth 2
Paradigms
Unit Testing, Responsive Web Design (RWD), REST, Responsive Layout, Agile, UI Design, E2E Testing, Role-based Access Control (RBAC), Component-based Development, Agile Software Development, Web Application Architecture, Clean Code, Testing, Real-time Systems, Mobile Development, UX Design, Search Engine Optimization (SEO), Test-driven Development (TDD)
Platforms
Amazon Web Services (AWS), Docker, Vercel, Linux, Web, Google Cloud Platform (GCP), Netlify, Blockchain, Shopify, Webflow, Algolia, iOS, Android, Clerk, Twilio, Kubernetes, Replit
Storage
Database Architecture, Databases, JSON, Amazon S3 (AWS S3), Cloud Deployment, MySQL, MongoDB, PostgreSQL, Redis, Elasticsearch, CouchDB, Azure Cosmos DB
Industry Expertise
Web Design, Social Media
Other
Payment APIs, Data Visualization, User Interface (UI), UI Development, ES6 Promises, Responsive UI, Pixel Perfect, API Integration, APIs, Front-end Development, OAuth, Front-end, A/B Testing, Analytics, Charts, Graphs, Dashboards, Full-stack, Integration, Axios, Mobile First, Architecture, Front-end Architecture, MERN Stack, First Contentful Paint (FCP), Cookies, GoDaddy, Responsive Web Apps, Performance, Scalability, Single-page Applications (SPAs), Vite, Progressive Web Applications (PWAs), Full-stack Development, CSS Modules, Design, UI Frameworks, UI Libraries, Back-end Development, Headless CMS, eCommerce, Server-side Rendering (SSR), SEO Tools, CSS-in-JS, Forms, Responsive Design, Web Animation, Landing Pages, Startups, User Experience (UX), Web Development, Large-scale Projects, CI/CD Pipelines, cURL, API Design, API Testing, Cursor AI, Responsiveness, AI Tools, Security, Railway, Minimum Viable Product (MVP), Mobile UI, Software, Software Development, Dashboard Design, Mobile App Development, Figma to React, Payments, Database Schema Design, QR Codes, Authentication, SaaS, Deployment, WebSockets, Supabase, Migration, Back-end, App Store Acceptance Process, CRM, Code Review, Technical Consulting, Software Architecture, Onboarding, IT Audits, Accessibility, Design Systems, Web Content Accessibility Guidelines (WCAG), Scalable Architecture, Problem Solving, FastAPI, Software Design, MVP Design, Billing, Optimization, Websites, App Store, Web App Development, Maps, Google Analytics 4 (GA4), Debugging, Chrome DevTools, Web Standards, Conversational AI, Webhooks, Authorization, Cloudflare, Agentic Coding, AI-assisted Development, CMS, Core Web Vitals, AI Engineering, Third-party APIs, Supabase Auth, Security Audits, Web Applications, English, DNS, Software as a Service (SaaS), Technical Leadership, Data Integrity, Styled-components, Single Sign-on (SSO), Google BigQuery, OpenAI, UI Animation, Web3, XState, Cryptocurrency, Web Components, Artificial Intelligence (AI), Squarespace, Agentic AI, AI Integration, Mobile Apps, Cordova, AI-based Content SEO, Technical SEO, Strapi, Zustand, AI Agents, AI Architecture, Real-time Computing, SVG Animation, SVG, Visualization, Storybook, Data Virtualization, Web Video, Discord, UI Testing, JSON REST APIs, Chatbots, Crypto, Resend, NextAuth.js, Stripe Subscriptions, Stripe Payments, TypeORM
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