Arun Kumar
Portrait of Arun Kumar
Full-stack mobile engineer · Product builder · Open to remote work

I build mobile apps and products that are ready for real users.

Flutter, React Native, Android, iOS, Django / Python, Next.js, and AI-assisted delivery for startups, agencies, and product teams.

Full-Stack Mobile Engineer and product builder with 5+ years delivering production apps across Flutter, Android, iOS, React Native, and Django/Python backends. I have worked with clients across Australia, New Zealand, the US, UAE, and India, and I have independently designed, built, and shipped my own live product.

Delhi, India
Remote friendly
25+ apps live
45K+ global users
Flutter · React Native · Android · iOS
Django / Python · Next.js
Works effectively with AI tools and without them
Own product builder Built and launched a real product across web, mobile, backend, and deployment.
Client-facing engineer Comfortable working directly with founders, clients, recruiters, and distributed teams.
Delivery focused Strong on production apps, store releases, API integration, and shipping stable features.

Quick snapshot

Mobile engineering, backend support, and product ownership.
5+ years of experience
25+ apps live
45K+ global users reached
4 regions served: IN, AU, US, UAE

Why teams hire me

What clients and recruiters usually want to know quickly.

Strong mobile foundation

I work across Flutter, React Native, Android, and iOS, so I can contribute whether a product is cross-platform or platform-specific.

Backend support when needed

I design and build Python services and Django REST APIs when mobile products need backend ownership, real-time features, or tighter API coordination.

Understands product, not only code

I have built my own product, so I think beyond implementation and pay attention to usability, delivery, and business value.

Working with modern tools

A practical engineering approach to AI-assisted development.

Uses AI where it helps

I use tools like Claude Code CLI, Cursor, GitHub Copilot, Codex, and OpenAI APIs when they improve speed, quality, debugging, and delivery.

Not dependent on AI

I am comfortable building features, APIs, architecture, and production releases without relying on AI tools when a project or company prefers a traditional workflow.

Engineering judgment first

I treat AI as support, not a substitute for problem solving. Code quality, maintainability, testing, and product understanding still come first.

Experience

Mobile delivery, backend execution, and team leadership.

Senior Software Engineer & Team Lead

Jun 2023 - Present
Infinity Soft Systems · Noida · Remote-capable
  • Delivered 10+ production apps for clients in Australia and New Zealand using Flutter, React Native, Android Native, and iOS Native.
  • Built and maintained Django REST Framework APIs with auth, CRUD, WebSocket endpoints, and third-party integrations.
  • Integrated AI features via OpenAI APIs and reduced LLM API costs by around 60% through token optimisation and context control.
  • Automated CI/CD with GitHub Actions and Fastlane, reducing release turnaround from 2 days to under 2 hours.
  • Led a team of 4 while staying hands-on with architecture, code quality, and delivery.

Flutter Developer

Sep 2021 - Aug 2023
Shine Web Solutions Pvt. Ltd. · Noida
  • Built 6+ Flutter and Android apps with Firebase, Supabase, REST APIs, WebSockets, and payment gateway integrations.
  • Designed and exposed backend APIs using Django REST Framework for mobile-first products.
  • Implemented GetX, Provider, and BLoC in scalable and maintainable app architectures.

Selected projects

Client work plus one product built and launched independently.

Bicholiyas

Own product
Next.js · Django REST Framework · PostgreSQL · Flutter

Built and launched the full product stack for a matchmaking platform, including product planning, web app, mobile app, backend APIs, and deployment.

Darzee App

India
Flutter · Android · iOS · Firebase · REST API

Tailoring business app for orders, scheduling, and client management. Built for real business operations and scaled to 30,000+ users.

Disport

Australia
React Native · Android · iOS

Instagram-style sports social platform for athletes with posts, profiles, and leaderboard flows. Built for store-ready production delivery.

Faweeth

UAE
Flutter · Django REST API · Arabic / English

Building materials marketplace for Dubai with bilingual localisation and mobile-first marketplace flows.

Medhub, Your Fish, T1, Pawpular, Jobwish

AU / US
React Native · Flutter · Django/Python · Firebase · OpenAI API

Delivered healthcare, social, marketplace, NFT rewards, and AI job-matching products with real-time feeds, maps, store releases, and backend integrations.

The Goat

Australia
Flutter · Firebase · WebSockets · Django REST

Social platform for elite athletes with video sharing, live feed interactions, and leaderboard experiences.

About

I am a full-stack mobile engineer focused on Flutter, React Native, Android, and iOS, with practical backend ownership in Django REST Framework and Python. I work best with startups, agencies, and product teams that need one engineer who can understand the product well, own delivery, and ship stable apps for real users.

How I help

  • Build new mobile apps from idea to production using Flutter or React Native.
  • Improve existing apps with better performance, cleaner architecture, and release stability.
  • Create Python and Django REST APIs to support mobile products with scalable backend flows.
  • Work directly with founders, clients, and teams to turn product requirements into shipped features.
  • Use AI tools where they improve output, while staying fully effective without depending on them.

Core capabilities

Mobile engineering

Flutter, Android Native, iOS Native, React Native

Backend development

Django, Django REST Framework, PostgreSQL, SQLite, Firebase, Supabase, GraphQL, WebSockets

Web & product

Next.js, React, HTML, CSS, Tailwind CSS

Delivery workflow

GitHub Actions, Fastlane, GitLab CI, Jira, Notion, Slack, Figma

AI-assisted workflow

Claude Code CLI, Cursor, GitHub Copilot, OpenAI Codex, OpenAI API, prompt engineering, token optimisation, RAG, function calling, and AI agents.

Credentials & contact

Own product builder
Mobile + backend delivery
AI-capable, engineering-first
Async-first remote collaboration
Open to remote collaboration