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Flutter · AI · Product Engineering

I build mobile products that are ready to ship.

I'm a product engineer specializing in Flutter and AI, helping startups and growing teams turn ideas into production-ready mobile products — from MVP and backend integration to AI features, testing and store launch.

FlutterAIFirebaseSupabaseDart
Subhajit Kar

Building across mobile, AI and backend systems

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Work

Selected Work

Products, platforms and mobile applications I've helped take from idea to reality.

Bill Bandhan dashboard and product marketing visual

Bill Bandhan

Product

A billing and shop-management platform built to help modern retailers manage everyday operations from a connected system.

Flutter · Strapi · Backend APIs

View Case Study
SplitE product marketing visual showing group bills, settlement and key features

SplitE

Product

A bill-splitting ecosystem designed around how young people share expenses before, during and after group activities.

Flutter · Dart · Firebase · Cloud Firestore · Clean Architecture

View Case Study
RVisual coming soon

Relio

Product

An advanced OTA platform for distributing Android and iOS builds to development and testing teams.

Next.js · Node.js · PostgreSQL

View Case Study

Who I Work With

Built for teams that need more than a coder.

I work best with founders, startups and small product teams that need someone who can understand the product, make technical decisions and move the build forward without requiring constant hand-holding.

Founders with an idea

You have the product vision and need an experienced engineer to turn it into a realistic MVP.

Startups building their next version

You have an existing product and need someone who can take ownership of new features, integrations or technical improvements.

Teams that need mobile expertise

You have the backend, design or product team in place and need a strong Flutter engineer to own the mobile side.

Services

What I Can Help You Build

Whether you're starting from an idea, preparing an MVP, or improving an existing application, I can take ownership of the engineering work needed to move the product forward.

MVP Development

Turn an idea into a launchable product without overbuilding the first version. I help define the technical scope, build the mobile experience and connect the systems needed to get your MVP into users' hands.

Flutter App Development

Build or extend production-ready cross-platform applications with Flutter, with an emphasis on maintainable architecture, reliable integrations and a smooth path to future development.

AI-Powered Mobile Experiences

Add practical AI capabilities to mobile products — from conversational interfaces and intelligent workflows to vision, recommendations and automation.

Backend & Product Integrations

Connect your application to the systems it needs, including Firebase, Supabase, REST APIs, authentication, databases, notifications, storage and third-party services.

Existing App Development & Modernization

Take an existing mobile product forward with new features, architectural improvements, performance work, integrations or a more maintainable development foundation.

How I Work

A straightforward path from idea to launch.

Good product development isn't just about writing code. I keep the process structured, transparent and focused on getting something valuable into users' hands.

  1. 01Discovery
  2. 02Scope
  3. 03Build
  4. 04Launch
  5. 05Iterate
See the full process
Image coming soon

Why clients can trust me with the build

Product Ownership

I don't only build software for others. As Co-founder & CTO of Lazy Tech Savvy, I build and operate products of my own.

Production Engineering

My experience comes from building and shipping real mobile software in professional engineering environments — where reliability, deadlines, collaboration and maintainability matter.

End-to-End Thinking

I work beyond the UI layer, connecting product decisions with architecture, backend systems, APIs, AI capabilities and deployment.

Transparent Engineering

I make technical decisions, trade-offs and constraints visible instead of hiding complexity until it becomes a problem.

Image coming soon

About

I started my career as a software engineer, then became increasingly interested in the problems behind the features — why something should exist, who it should serve, and how technical decisions affect the product later. That shift led me to co-found Lazy Tech Savvy, where I work as CTO and build products such as Bill Bandhan, SplitE and Relio. I now bring that same product-oriented approach to selected engagements with founders and teams.

Read the full story

Have something worth building?

Tell me what you're trying to build, where you are today, and what you need to get to the next milestone. If I can help, we'll figure out the right way to move forward.