Senior Flutter Developer
6+ years building cross-platform Flutter apps with Firebase — from greenfield builds and AI features to debugging and stabilizing apps that need to ship clean.
How to hire me
One senior mobile developer on your project — Flutter-first, with experience across Android, iOS, and React Native when the stack calls for it. Full-time remote or a scoped engagement with clear deliverables. No hourly rate tables or marketplace pricing.
You work directly with Sagar — not a bench team or agency handoff.
Based in India with overlap for EU mornings and US East evenings.
MVP build, AI add-on, or stabilize an existing app — structured around your stage.
Immediate availability for the right fit — scope agreed before we start.
Three focused engagement tracks — cross-platform builds, AI in Flutter apps, and stabilization for apps that need to ship clean. Pick the track that matches where you are today.
Apps That Ship
From brief to App Store — Android · iOS · Web + Firebase
Cross-platform Flutter builds from concept through store release — production code, Firebase backend, and a codebase your team can extend.
Idea → Design → Develop → Deploy → Support
Turn ideas into smarter apps
Chatbot · Smart Replies · Recommendations — ChatGPT · Firebase · APIs
AI features in Flutter apps — ChatGPT, LLM APIs, and Firebase — grounded in shipped work like JOII’s AI-powered period evaluation, plus capability to integrate conversational and recommendation features.
Chatbot
24/7 intelligent conversations
Voice Commands
Hands-free experiences
Smart Search
Find what users need, faster
Personalized Feed
Tailored recommendations
Content Generation
Text, images and more
API Integrations
Connect with any AI service
Shipped AI in production: JOII — AI image analysis in production →
Stable apps. Happier users.
UI · Crashes · Performance — debug, polish, and stabilize existing Flutter apps
Stabilize and polish existing Flutter apps — layout overflows, runtime crashes, Firebase permission issues, and performance bottlenecks — so you can ship with confidence.
Diagnose
Find and understand the real issue
Patch & Test
Apply clean fixes and thoroughly test
Ship Stable
Deliver a fast, reliable, and polished app
Under the Flutter Apps That Ship track — focused engagement models mapped to real product stages, not open-ended contracts.
Launch faster with a focused Flutter MVP — scoped to 3–5 core features, Firebase backend, and a codebase your next developer can extend without a rewrite.
Optimize architecture and performance for user growth, sale spikes, and feature expansion — clean layers, efficient Firestore patterns, and confident releases.
Production Firebase setup: auth flows, Firestore security rules, offline-tolerant data layers, Cloud Functions, and cost-aware read patterns at scale.
Ship to the App Store and Google Play with signing, privacy labels, review prep, and staged rollout — not a scramble the week before launch.
Real apps shipped to the App Store and Google Play — with metrics from published case studies, not invented testimonials.
Real-time fleet tracking and vehicle management for logistics businesses
100K+
Google Play downloads
4.0★
Play Store rating
3.6★
App Store rating
Pregnancy and hypnobirthing app with guided audio and offline access
50K+
Google Play downloads
4.7★
App Store (500+ ratings)
Offline audio
Downloaded session playback
AI-powered menstrual health app for objective period blood loss measurement
100+
Google Play downloads
App Store & Play
Dual-platform release
AI analysis
Blood loss & clot measurement
Cross-platform beauty and personal-care shopping app built for scale
1M+
Google Play downloads
4.7★
App Store (6K+ ratings)
4.6★
Play Store (25K+ ratings)
Cross-platform pet care marketplace for booking sitters, walkers, grooming, and vet services
Therapy telehealth app with session scheduling, pre-session check-in, and secure messaging
Define product goals, MVP scope, architecture decisions, and delivery milestones aligned with business outcomes.
Build the app using Flutter with clean architecture, robust state management, and maintainable feature modules.
Ship confidently with QA-focused release workflows, analytics setup, and post-launch stability monitoring.
Process covers the build phases — this is what the working relationship looks like day to day.
Every engagement begins with agreed deliverables, milestones, and what is in or out of scope — so there are no surprise expansions mid-build.
You work with me directly on architecture and implementation decisions, with written progress updates between sync calls.
Project-based delivery for MVPs and launches, or ongoing support after release — structured around your stage, not a generic retainer.
Share your product goals and timeline — book a free consultation or send a message through the contact form.
See case studies for production examples.
Honest answers to questions founders ask before starting — timelines, expectations, ownership, and how to get in touch.
Practical guides on hiring, Firebase production readiness, offline-first design, store release, cost planning, and architecture — written from production experience.
Let's discuss your product goals, timeline, and the right track for your stage. Book a free consultation or send a message through the contact form.