Chanchal Maity
Full-stack, mobile, realtime, AI-native, and product engineering work with production-grade depth.
Chanchal Maity
AI-native product engineer
Now featuring
AasPas marketplace, AasPas Smart Box, and Mushdelight show end-to-end ownership across payments, live tracking, native Android, connected devices, automation, AI-assisted workflows, commerce journeys, and cloud-backed product behavior.
AI-native execution
I use GPT, Claude, and Gemini as force multipliers for architecture, debugging, and implementation, but I also control hallucinations, verify logic, and push output to production-ready quality on complex systems.
Three-plus years of building AI-native mobile, realtime, IoT, and web products
I am Chanchal Maity, a developer focused on production-grade systems: React Native apps, Next.js websites, Node.js APIs, realtime sockets, payment workflows, location tracking, reliable mobile behavior beyond basic UI screens, and AI-native execution with strong prompt control and verification discipline.
Elite skills
I work with AI the way strong engineers work with powerful infrastructure: with control, structure, and accountability. My edge is not simply using AI faster than others. It is using AI to accelerate complex engineering without losing correctness.
Verified logic
Verified delivery
Speed matters, but trust matters more. I use verification loops so AI-assisted output can still hold up in real production logic.
I use AI to reduce execution time dramatically, but never by blindly accepting output. I break systems into stages, set constraints, verify logic, and keep the final judgment on architecture, edge cases, and production readiness in my own hands.
This is how I ship large solo builds with unusual depth. AasPas Marketplace, Smart Box, and Private Theater were not created through copy-paste prompting. They were built through guided AI collaboration, repeated validation, and engineering decisions strong enough for complex mobile, backend, realtime, and device workflows.
International teams and startups care about leverage. My leverage is that I can move with AI-level speed while still protecting correctness, system quality, and production behavior on real products.
I do not use AI as a novelty tool. I use it as an execution multiplier. When a problem is well-scoped, work that can take a conventional workflow ten hours can often be compressed into a focused thirty-minute delivery cycle through structured collaboration with GPT, Claude, and Gemini.
My advantage is not only generating output fast, but knowing when AI is wrong. I actively detect hallucinations, challenge weak logic, and drive the model toward production-ready behavior for complex flows such as native Android calling, payment correctness, recovery logic, and realtime state handling.
For architecture and system design, I use multi-step prompts, verification loops, constraint framing, and logic re-checks so the final output is not just fast but dependable enough to ship.
I built major systems such as AasPas Marketplace, AasPas Smart Box, and AasPas Private Theater through deep AI collaboration while still owning the technical decisions, debugging, validation, and final production behavior myself.
Product engineering portfolio
This portfolio is intentionally structured to show product depth clearly: not only screens, but the actual system thinking behind maps, wallet logic, booking state, notifications, mobile recovery, native Android behaviors, and business-facing operations.
Flagship case study
AasPas is a full-stack hyperlocal services platform with customer booking, worker operations, live worker tracking, native voice calls, payment automation, worker earnings, multilingual UX, support flows, and admin-ready operations.
This product was designed, built, and iterated end to end by me as a solo developer across mobile UX, backend APIs, realtime systems, native Android behaviors, payments, tracking, worker tooling, and admin operations.
Minimum booking fee, online or cash booking flow, backend-owned payment truth, remaining amount collection, worker earnings, commission logic, wallet records, and settlement-oriented money movement.
Live worker location streaming, route caching, ETA and distance awareness, service-radius discovery logic, latest-location recovery, and controlled rerouting instead of wasteful map API calls.
Incoming booking popups, native call activities, full-screen notification behavior, lock-screen entry, ongoing-call return path, speaker and earpiece control, and background-safe calling UX.
Support, reviews, notifications, version control, admin oversight, video/tutorial management, service monitoring, and business-side visibility across the marketplace lifecycle.
A conversational booking-help layer can understand user intent across languages, assist with service discovery, and automate booking actions such as guiding or initiating requests for electricians and other workers.
Role-based customer and worker experiences built in React Native with StyleSheet-driven native screen architecture, multilingual UX, state-driven flows, and offline-aware behavior.
A Node.js and Express backend that owns canonical booking, payment, worker, wallet, and history state with protected routes and validation.
The product also includes conversational booking-help patterns that connect natural-language service intent to guided marketplace actions without exposing internal business logic.
Socket-driven state propagation keeps customer, worker, and admin experiences synchronized through booking rooms and targeted event delivery.
Fast active-booking reads are separated from durable recovery so the product remains responsive while still recovering from app reinstall or reconnect scenarios.
Platform-specific Android work was added where plain React Native was not enough for booking urgency, call UX, and background behavior.
The product integrates payment, maps, calling, and notification infrastructure while keeping backend-owned correctness for sensitive business state.
Flagship product
A production-grade hyperlocal service platform with customer booking, worker operations, multilingual AI booking help, React Native StyleSheet-driven screens, live tracking, native calls, payment automation, wallet settlement, support, reviews, and admin workflows.
Built as a complete marketplace system: role-based mobile apps, React Native StyleSheet-based screen architecture, backend APIs, native Android modules, realtime sockets, route caching, multilingual AI assistance, payment reconciliation, worker earnings, settlement-aware money flows, and operational tooling.
Minimum booking fee, online or cash booking flow, backend-owned payment truth, remaining amount collection, worker earnings, commission logic, wallet records, and settlement-oriented money movement.
Live worker location streaming, route caching, ETA and distance awareness, service-radius discovery logic, latest-location recovery, and controlled rerouting instead of wasteful map API calls.
Incoming booking popups, native call activities, full-screen notification behavior, lock-screen entry, ongoing-call return path, speaker and earpiece control, and background-safe calling UX.
Support, reviews, notifications, version control, admin oversight, video/tutorial management, service monitoring, and business-side visibility across the marketplace lifecycle.
A conversational booking-help layer can understand user intent across languages, assist with service discovery, and automate booking actions such as guiding or initiating requests for electricians and other workers.
Skill map
I focus on building complete products: frontend, backend, native mobile behavior, realtime infrastructure, payments, and operational reliability.
Mobile products with native Android behavior, background services, notifications, maps, payments, and cross-platform implementation breadth.
API, realtime, database, auth, payments, cache, and operational flows for production products across JavaScript and Python ecosystems.
Modern websites and dashboards with strong UI, SEO, responsiveness, and deployment readiness.
Designing reliable user journeys across booking, payment, tracking, recovery, and admin operations.
Strong implementation comfort across modern product languages, lower-level foundations, markup, styling, and core application logic.
Advanced use of GPT, Claude, and Gemini for architecture breakdown, verification loops, hallucination control, and faster production delivery.
Selected work
Each project is presented as a product system: what it solves, how it behaves, and what level of engineering ownership it demonstrates.
AasPas is the strongest proof of solo product ownership in this portfolio. It combines maps, payments, wallet logic, realtime booking state, native Android, worker operations, and business-side controls in one connected system.
A full-stack React Native and Node.js platform for service booking, multilingual AI booking help, worker operations, native calling, live tracking, payment automation, wallet settlement, multilingual UX, and admin workflows.
Advance booking fee, remaining balance, worker earnings, commission, cash collection, wallet visibility, and settlement-oriented flow are handled as one connected marketplace payment system.
Worker radius, availability, live location, route cache, latest-location recovery, ETA awareness, and controlled rerouting make tracking behave like a serious logistics-style flow.
Incoming booking popup, full-screen call UX, ongoing-call notification, lock-screen actions, background-safe flows, and return-to-call behavior were built natively where JS-only UX was not enough.
Customer app, worker app, admin tooling, support flows, review handling, version control, and notification routing make the project feel like a full business system, not a prototype.
A multilingual assistant layer helps users express service needs naturally, route them to the right worker flow, and reduce friction during discovery and booking.
A full-stack smart-switch platform built around ESP32 hardware, cloud APIs, a web dashboard, a mobile app, relay automation, energy analytics, and device-recovery behavior.
Commerce productA premium food-commerce website with customer auth, OTP verification, order lifecycle handling, reviews, subscriber communication, and admin-side product operations.
Retail commerce systemA full-stack retail storefront with category browsing, search, variant-aware product pages, cookie-authenticated sessions, wishlist, cart persistence, and merchandising sections.
Realtime web productA collaborative watch-party website with host-controlled playback, join-link room entry, WebRTC voice, live chat, emoji reactions, and multi-source video support.
Telephony workflow appAn Android-first visual voicemail product with Twilio call forwarding flow, voicemail inbox, unread state, greeting setup, and audio playback.
Mobile imaging productA premium camera-style React Native app with capture modes, gallery import, permission UX, device-side enhancement flow, quality selection, and polished preview behavior.
Live demoA premium business website for an architecture consultancy with service storytelling, portfolio presentation, responsive sections, and lead-generation structure.
Hackathon projectA gamified learning product with quiz flows, progress mechanics, role-based learning ideas, PWA thinking, and interactive frontend architecture.
Confidential client projects across commerce, management dashboards, booking systems, realtime workflows, payment integrations, and business websites.
About me
I build applications where mobile UX, backend correctness, realtime state, and business workflows all need to work together. My strongest work is AasPas, a full-stack service marketplace that includes native Android call screens, live tracking, booking workflows, payments, worker earnings, localization, AI booking assistance, and admin operations.
I am now positioning my work for serious interviews and remote opportunities, especially where teams value ownership, product thinking, AI-native execution speed, and the ability to debug across frontend, backend, native mobile, and production flows.
Experience
Independent product development
Built production-grade mobile and web products end-to-end for more than three years, including AasPas, a large service marketplace with native Android calling, live tracking, payments, sockets, AI-assisted booking support, worker operations, and admin-ready backend logic.
Client and portfolio projects
Delivered modern web applications and business websites using React, Next.js, Node.js, MongoDB, authentication, payment integrations, and responsive UI systems.
Contact
I am open to remote roles, freelance work, and interviews where I can discuss real product engineering: mobile apps, backend systems, payments, maps, realtime infrastructure, and native Android behavior.