Nikhil Singh

Experiences

1. 

   Upwork

   Apr 2025 - Current

   Full Stack Web and Mobile Developer

   AutoQuote is a full-stack application designed to streamline the vehicle repair and parts procurement process. The platform allows customers to receive service quotations, schedule appointments with nearby body shops, make payments, and track service progress — all from a centralized system. I built and contributed to the system across web (Next.js), mobile (React Native), and backend (Node.js + MongoDB). --- 🔧 Responsibilities & Tech Stack 👨‍💻 Frontend – Web (Next.js) Stack: Next.js 14, Tailwind CSS, ShadCN UI, Zustand, TypeScript Built a responsive UI for customers to: View, accept, and negotiate service quotations. Book appointments and get estimated repair durations. View service provider profiles with ratings, location, and distance. Integrated Stripe Checkout for secure online payments. Implemented “Get Directions” functionality with Google Maps using query_place_id to help users navigate to the bodyshop. Designed a dynamic quote & appointment dashboard showing status, visit date, and price. 📱 Mobile – React Native Stack: React Native, Expo, Zustand, Axios Replicated core web features for mobile: booking, quotation approval, payment, and service history. Used device geolocation to compute and display the nearest workshops. Provided push notifications for appointment reminders and quotation updates. 🧠 Backend – Node.js + Express + MongoDB Stack: Node.js, Express, MongoDB, Mongoose, Stripe Built a RESTful API to handle: Customer, business, and appointment management. Quotation lifecycle (creation, negotiation, status tracking). Secure Stripe Checkout session creation and webhook verification. Managed appointment cancellation and tracking, including cancellation reason and source (user or business). Implemented role-based access control (RBAC) for customers and service providers. Connected backend to MongoDB Atlas with efficient indexing and Mongoose schema design (referencing vehicles, quotations, and payments). --- 🌟 Key Features 📍 Smart Quotation Matching: Customers submit damage info; shops reply with quotations based on images and notes. 📆 Appointment Scheduling: Real-time booking system that prevents overlaps and allows date filtering. 💳 Stripe Payments: Integrated checkout with webhook support for status tracking. 🗺️ Google Maps Integration: Direct navigation to service providers using precise coordinates and place_id. 📱 Cross-platform Access: Consistent experience across web and mobile using shared component logic and API structure. --- 💡 Outcome This project demonstrates my ability to architect and implement a full-stack solution — from data modeling and API design to responsive UI/UX and mobile experience — suitable for a modern SaaS service in the automotive domain.
2. 

   Upwork

   Dec 2024 - Mar 2025

   Full Stack Software Web and Mobile Developer

   As a freelance Full Stack Developer, I partnered with multiple clients to deliver high-impact, mobile-first applications across industries like HR, CRM, dating, and public transit. I led full-cycle development—from frontend UX design to backend architecture—focused on scalability, real-time features, and user-centric functionality. 🔹 Key Projects & Contributions ✅ HR Management App – Warley Store An internal HR platform to streamline employee operations for a multi-location retail chain. ⏱️ Employee Punch In/Out, break logging, and leave management 📊 Attendance dashboards for HR/Admin monitoring ✅ Onboarding checklists with status tracking 🔐 Role-based access and secure authentication Tech Stack: React Native, Firebase Auth & Firestore, Node.js ✅ Primeremoval – CRM & Booking Platform A service scheduling and CRM platform tailored for a home improvement business. 📅 Calendar-based appointment booking with technician assignments ✉️ SMS/email automation via third-party integrations 🛠️ Admin panel for managing leads and service history Tech Stack: Next.js, Express.js, MongoDB, NodeMailer ✅ Dating App A modern dating app with a focus on intuitive design and real-time interaction. 🔄 Swipe-based discovery UI with real-time match updates 📍 Geo-fencing and distance-based filters 💬 In-app chat with media sharing and presence indicators 🔐 User verification and secure login Tech Stack: React Native, Firebase, Node.js ✅ Metroverse A mobile companion for Delhi Metro users with real-time navigation and alerts. 🗺️ Live metro train tracking using Google Maps API + GTFS data 🚉 Destination-based alerts and route planning 📱 Cross-platform support for iOS and Android Tech Stack: React Native, Firebase, Google Maps API 🛠️ Technologies Used Frontend: React Native, React.js, Next.js Backend: Node.js, Express.js Databases: MongoDB Others: REST APIs, Socket.IO, NodeMailer, FCM,Google Maps API
3. 

   Upwork

   Mar 2024 - Nov 2024

   Full Stack Web and Mobile Software Engineer

   At AiFalcon, I led the full-stack development of a scalable POS and CRM SaaS platform serving businesses such as grocery stores, salons, lounges, gas stations, and jewelry shops. I built both the customer-facing and internal admin systems from scratch, ensuring high performance, scalability, and real-time data insights. 🔧 Key Responsibilities: Architected the platform using React.js, Node.js, MongoDB Designed role-based access systems for Admins, Managers, and Cashiers. Integrated Square Payments, FCM notifications, and automated cron jobs for daily reports. Implemented AI-powered dashboards for sales analytics and forecasting. Built table/reservation systems for service-oriented businesses. Delivered a CRM module for lead tracking, promotions, and campaign management. Optimized backend for multi-tenant deployments and scalability. 🛠️ Tech Stack: React.js, Node.js, MongoDb , Firebase (Auth + FCM), REST APIs, Cron Jobs, Square API, React Native Paper
4. 

   2DigitInnovations

   Jan 2024 - Mar 2024

   React Native Developer

   At 2Digit Innovations, I served as a React Native Developer, where I played a pivotal role in the design and development of mobile applications that enhanced user engagement and simplified service delivery across diverse domains. My focus was on building high-performance, cross-platform mobile solutions using modern technologies and intuitive UI/UX practices. 🔹 Key Projects & Contributions: 📱 SwiftGuard – Security Services Mobile App Designed and implemented core functionalities for SwiftGuard, a mobile platform that connects clients with vetted security professionals. Developed seamless authentication workflows and booking systems for real-time service requests. Integrated Firebase for user management and backend services. Utilized React Native Maps for geolocation tracking and OneSignal for real-time push notifications. Optimized performance and responsiveness across both iOS and Android platforms. 🧳 SKTraveler – Travel Marketplace App Contributed to the development of SKTraveler, a mobile application bridging travelers with travel package providers. Implemented real-time chat functionalities using Socket.IO, improving customer-provider communication. Integrated the Google Maps API for accurate location-based services and route suggestions. Enhanced the app’s booking engine for a smooth, intuitive travel planning experience. In this role, I leveraged my strong command of React Native, JavaScript, and real-time APIs to deliver scalable and user-friendly mobile applications. My contributions directly improved user experience, operational efficiency, and service accessibility for end-users. This experience strengthened my expertise in building robust, production-ready mobile applications that solve real-world problems.
5. 

   Splen Technologies and Education Pvt

   Jan 2023 - Dec 2023

   Full Stack Developer

   At Splen Technologies, I worked as a Full Stack Web Developer, leading the end-to-end development of a robust educational and administrative platform using the MERN stack—Next.js, Express.js, MongoDB, and Node.js. My role focused on building scalable systems that addressed a wide array of user needs—from student enrollment and course management to internal HR operations and real-time communication. 🔹 Key Projects & Achievements: 🌐 Web Platform Development: Built responsive, SEO-friendly landing pages to drive course visibility and engagement. Developed a smooth course purchasing workflow that simplified the enrollment process for students and boosted conversions. 🛠️ Admin Panel: Engineered a powerful admin dashboard to manage employee onboarding, attendance, task allocation, and salary distribution. Designed tools for managing student batches, promotions, and coupons. 👨‍🏫 Employee Dashboard: Created an employee portal for real-time task tracking, attendance, student support, and assignment handling. Integrated in-app chat functionality for instant issue resolution and collaboration. 📄 Automated Certificate Generation: Implemented a secure and automated system to generate digital certificates for course and event completions. 📚 Student Panel: Enabled easy access to course materials, assignments, tests, and certifications through an intuitive user interface. Ensured seamless payment experiences through gateway integration. 🔌 Additional Features & Integrations: Developed modules for event management, batch allocation, coupon creation, and email communication. Integrated essential third-party services to support notifications, payments, and document delivery. This role honed my skills in full-stack JavaScript development, REST API architecture, and user-centric design. I collaborated across teams to deliver a unified, high-performance platform that supported educators, students, and internal staff with precision and efficiency.