Available for Opportunities

Hi, I'm
Jayesh Jain

Senior Flutter Developer with 4+ years building production-grade fintech, trading, and e-commerce apps. Expert in Clean Architecture, Bloc/Riverpod, and cross-platform performance at scale.

4+
Years Experience
10+
Apps Shipped
1
Pub Package
4
Companies
About

Building Fintech Apps
That Perform at Scale

I'm a Senior Flutter Developer with 4+ years of hands-on experience delivering high-performance, cross-platform mobile applications in the fintech domain — specialising in secure, scalable architectures trusted in production environments.

Currently at BillMart FinTech Pvt. Ltd., I independently manage the full app lifecycle — from design to deployment. Previously at WDIPL, I shipped three production apps covering e-commerce, trading, and fintech verticals using Bloc architecture and third-party integrations like Shufti Pro KYC and Apple Pay.

My philosophy? Great code is invisible — users should experience the magic, not the complexity behind it.

Cross-Platform iOS & Android Clean Architecture & Bloc Mentoring & Code Reviews Fintech Payment Integrations CI/CD & GitHub Actions Performance Optimisation
Skills

Tech Stack

Flutter / Dart95%
Bloc / Riverpod / Provider92%
Firebase90%
REST APIs & Networking90%
Stripe / Razorpay / Apple Pay88%
Git & CI/CD88%
SQLite / Hive / Firestore85%
Google Maps & Deep Linking82%
Portfolio

Published Apps

Production apps shipped to the Play Store — live, used, and trusted by real users.

GOWATERLESS

GoWaterless — On-Demand Car Wash

Waterless car wash booking platform with real-time slot management, location-aware service discovery, and a seamless checkout experience.

FlutterFirebaseREST APIMaps
Play Store
TRADERS CIRCUIT

Trader's Circuit — Trading Analytics

Advanced trading analytics app with real-time market data, Smallcase integration, portfolio tracking, and full token management with error handling.

FlutterSmallcaseSocket IOREST API
Play Store
TANAMI

Tanami — Lifestyle E-Commerce

Premium lifestyle shopping app with smooth custom animations, curated product discovery, and a fast, secure multi-step checkout flow.

FlutterFirebaseStripeREST API
Play Store
WOKA

Woka — Social Platform

Social networking app featuring real-time feeds, rich media content, engagement tools, and a smooth infinite scroll experience powered by Provider state management.

FlutterFirebaseRiverpodREST API
Play Store
GETSETFIT

GetSetFit — Health & Fitness

Fitness tracking and workout app with personalised plans, progress dashboards, push notifications, and Firebase Analytics for user retention insights.

FlutterFirebaseAnalyticsREST API
Play Store
HELLOASTRO

HelloAstro — Astrology Platform

Live astrology consultation app with real-time expert matching, Shufti Pro KYC onboarding, in-app payments, and Razorpay integration. Live on both stores.

FlutterShufti ProRazorpayFirebase
Play Store
Open Source · pub.dev Package

dummy_api_overlay

A developer overlay for mocking REST API responses during Flutter development. Supports both http and dio — no production code changes needed. Drop it in, test faster, ship cleaner.

View on pub.dev
v0.1.1
Latest Release
Career

Work Experience

From full-stack intern to owning production fintech apps — a journey of consistent growth and impact.

Nov 2024 — Present

Senior Mobile App Engineer

BillMart FinTech Pvt. Ltd. · Mumbai
  • Independently managed full app lifecycle — design through deployment — for a production fintech Flutter app
  • Reduced development time by 30% via cross-platform Flutter architecture with Clean Architecture and Bloc patterns
  • Improved app load times by 20% through memory profiling and render pipeline tuning
  • Implemented CI/CD pipelines using GitHub Actions for automated builds and deployments
  • Mentored junior developers on Clean Architecture, reusable widget design, and testing best practices
Oct 2023 — Nov 2024

Senior Flutter Developer

WDIPL – Mobile App Dev Co. · Mumbai
  • Delivered three high-complexity production apps (e-commerce, trading, fintech) using Bloc architecture
  • Integrated Shufti Pro KYC, Apple Pay, Socket IO, Smallcase with full token management and error handling
  • Leveraged Firebase Analytics & Crashlytics to detect crashes and drive user retention improvements
  • Led code reviews and established team coding standards; consistently met agile sprint deadlines
Mar 2023 — Oct 2023

Flutter Developer

Webapps Solutions Pvt. Ltd. · Kolkata
  • Built REST API-driven apps with real-time data sync, custom animations, and multilingual support
  • Implemented advanced state management (Riverpod/Provider) ensuring smooth, responsive UX across devices
  • Designed immersive UI/UX components, contributing to a 40% increase in user satisfaction scores
Jun 2022 — Dec 2022

Full Stack Developer

Studioous Media Agency · Kolkata
  • Built Flutter + Django/MongoDB apps, managing large NoSQL datasets for high-performance delivery
  • Launched a new feature that boosted user engagement by 20%
  • Contributed to agile sprint planning and cross-functional team collaboration
What I Do

Services

End-to-end Flutter development — from architecture planning to App Store launch.

Flutter App Development

Full-cycle cross-platform development for iOS & Android. Production-ready fintech and e-commerce apps built with Clean Architecture, Bloc, and Riverpod.

Architecture & Refactoring

Migrating legacy codebases to Clean Architecture or MVVM. Codebase audits, performance profiling, and state management upgrades to Bloc/Riverpod.

Payment Integrations

Stripe, Razorpay, Apple Pay, Google Pay — full secure payment flows with webhook handling, token management, and PCI-compliant implementations.

CI/CD & Deployment

GitHub Actions pipelines, Codemagic automation, Play Store & App Store submissions. Automated testing, build signing, and release management.

Background

Education & Achievements

Academic foundation and milestones that shaped my engineering mindset.

Master of Science — Information Technology
Shankar Narayan College, Mumbai · Aug 2023 – Jun 2025

Advanced studies in distributed systems, mobile computing, and software engineering — directly applied to production fintech architecture decisions.

Bachelor of Science — Information Technology
Shree L. R. Tiwari Degree College, Mumbai · Jun 2019 – May 2022

Core foundation in data structures, algorithms, networking, and software development that underpins every engineering decision I make today.

Published Flutter Package — pub.dev
dummy_api_overlay · v0.1.1 · 2026

Created and published a Flutter developer tool for REST API mocking during development, supporting both http and dio clients without production code changes.

Get In Touch

Let's Build Something Remarkable

Open to Senior Flutter roles, fintech projects, and freelance work. Mumbai-based, available globally.

Let's Connect

Whether you need a production fintech app from scratch, want to architect an existing Flutter codebase, or just want to talk Clean Architecture — I'm here for it. Typical response time: under 24 hours.