Building cross-platform Flutter & native Android apps used by real people — with clean architecture, smooth UX, and battle-tested integrations like Dio, Retrofit, Firebase & Google APIs.
I'm Srijan Chakraborty, a Flutter & Android Developer based in Kolkata, India with 3+ years of professional experience crafting mobile applications that are fast, reliable, and delightful to use.
I specialize in Flutter & Dart for cross-platform development (Android + iOS), and Java & Kotlin for native Android, with deep experience in Dio, Retrofit, payment gateways (PhonePe, Razorpay), and the full Firebase ecosystem.
I've built and shipped production apps on Google Play Store, worked on enterprise projects for clients like DP World, and led cross-functional teams — improving system performance by 25% and reducing bugs by 30%.
I hold a B.Tech in Electrical Engineering from MAKAUT, West Bengal — which taught me to think in systems and solve complex problems from first principles.
Currently working on Keytab at ARISU App Solutions. An active production Android application. Details are ongoing as development continues.
▶ Available on Play StoreA fully API-driven Android application built and delivered at ARISU App Solutions. Designed and developed end-to-end as the sole Android developer on the project.
▶ Available on Play StoreBuilt solo for Dp World Company on a specialized mobile scanner device. Reads barcodes, QR codes, and other code types with real-time output. The challenge: Android OS was custom-optimized for that specific hardware device.
▶ Available on Play StoreA logistics tracking app connecting transporters and truck drivers. Tracks the complete journey from cargo loading to unloading. Fully API-based, designed and developed solo from scratch at ARISU App Solutions.
▶ Available on Play StoreA form-based healthcare Android application. Worked on this project from beginning to end as the sole developer — handling all UI, logic, and API integration independently at ARISU App Solutions.
▶ Available on Play StoreA Point-of-Sale Android application with integrated PhonePe payment processing. Built at ARISU App Solutions as part of a suite of business tools.
Currently building a cross-platform Flutter app at ARISU App Solutions. Integrates Google Maps API for location features, Firebase for real-time data, and Dio for efficient REST API communication. Available on both Android and iOS.
▶ Available on Play StoreA Flutter app that scans barcodes and QR codes and directly prints the scanned content to connected printers. Built for business workflows where fast scanning and instant label or receipt printing is essential. Works on both Android and iOS.
▶ Available on Play StoreA cross-platform accessibility app built for people with hearing impairments. SpeakUp converts speech and environmental sounds into on-screen text in real time, helping users stay connected to the world around them. Shipped on both Android and iOS.
▶ Available on Play Store & App StoreA real-time live streaming Flutter app supporting live video broadcast and viewer interaction. Built for both Android and iOS with low-latency streaming, live chat, and real-time audience engagement features.
▶ Available on Play Store & App StoreProvided support and assistance for TradeMert BD. Contributed to bug fixes, feature enhancements, and performance improvements. Live on the Google Play Store.
▶ Available on Play StoreSupported the Rapid CricketLine app — a live cricket score and updates platform. Worked on improvements and stability fixes. Live on the Google Play Store.
▶ Available on Play StoreProvided support for E Attendances — a digital attendance management system. Contributed to feature additions and bug resolution. Live on the Google Play Store.
▶ Available on Play StoreAssisted with Popo Live, a live streaming application. Helped improve stability and user experience. Live on the Google Play Store.
▶ Available on Play StoreMorning Worker is a healthcare and medical device application designed to connect, control, and monitor medical machines through Bluetooth communication. The app enables users to pair with supported medical devices, send and receive custom machine commands, and operate equipment both manually and remotely via a secure and responsive mobile interface. Live on the Google Play Store.
▶ Available on Play StoreDwaiOnline is a comprehensive online pharmacy and healthcare e-commerce platform that enables users to order medicines, health essentials, and personal care products directly from their smartphones. Designed for accessibility and trust, the app ensures secure payments, real-time order tracking, and swift doorstep delivery — making healthcare shopping seamless and convenient.
▶ Available on Play StoreOpen to full-time roles, freelance Android projects, and interesting collaborations. Based in Kolkata, available remotely worldwide.
Or email directly: srijan833shakraborty@gmail.com