Open to Work Kotlin · Java · Android

Tushar Saini

Senior Android Engineer · 6 Years

I build Android apps that scale to millions of users — specializing in real-time communication systems: live chat, audio/video calling, and live streaming using Agora SDK, WebSockets, and Firebase. ~100 production releases shipped. Clean Architecture. Zero-compromise performance.

6+ Years in Production

1M+ Installs (Suvich)

1.5L+ Installs (AstroSansaar)

~100 Production Releases

4.5★ Play Store Rating

See My Work Hire Me →

About Me

"I've shipped ~100 production releases, integrated 20+ REST APIs and 10+ third-party SDKs, and built real-time communication systems now used by over 1.15 million people."

For 6 years I've specialized in the hardest problems in mobile: real-time communication systems at scale — live chat, one-to-one audio/video calling, and multi-user live streaming — all shipped, all in production, all battle-tested at 1M+ user scale.

At Dhawala Online Solutions, I led a 4–6 person Android team for Suvich, taking it from ground zero to 1M+ installs with 8,000+ reviews and a 4.5+ Play Store rating — delivering approximately 100 bi-weekly production releases over 4 years. I owned the entire real-time stack: Sendbird and Firebase for chat, Agora SDK for calls and live sessions, and a concurrent order queue system engineered to handle simultaneous requests without race conditions.

I work with Clean Architecture and MVVM not because it sounds good on a resume, but because I've seen what happens to apps that don't. I write Kotlin code that teams can actually maintain, extend, and be proud of six months later.

Currently at AstroSansaar, leading Android across 3 products (AstroSansaar, Krishi Suvidha, LegalFind). Open to freelance projects and remote full-time roles worldwide.

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Location

Dera Bassi, Punjab · Remote-Ready

✉️

14tusharsaini@gmail.com

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Phone / WhatsApp

+91 90419 52816

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Education

B.Tech Computer Science

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tushar-saini-b76635145

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Time Zone

IST (UTC+5:30) · Flexible Hours

What I Can Build for You

Whether you need a feature built, an architecture set up from scratch, or an existing app rescued — here's exactly what I deliver. Every engagement comes with clean, documented, production-ready code.

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Real-Time Chat Integration

End-to-end in-app messaging built to handle thousands of concurrent users. I've shipped this at scale using multiple real-time stacks.

WebSocket-based messaging with reconnect logic
Firebase Realtime DB chat implementation
Sendbird SDK integration & customization
Typing indicators, read receipts, media messages

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Audio / Video Calling

Production-grade 1-to-1 and group calling using Agora SDK — handling edge cases like background states, poor network, and device switching.

Agora SDK audio & video call integration
Call state management across app lifecycles
Notification-based call pickup (foreground & background)
Network resilience and reconnection handling

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Live Streaming Features

Interactive live sessions with multi-user broadcasting. Shipped for astrology consultation apps with real-time host/audience interaction.

Agora interactive live streaming (host + audience)
Real-time viewer count & audience interaction
Gift/reaction systems during live sessions
Order queue management for concurrent sessions

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Android App Architecture

Clean, scalable foundations that survive team growth and product pivots. Ideal for startups about to scale or teams inheriting messy codebases.

MVVM + Clean Architecture setup
Kotlin Coroutines & Flow migration
Jetpack components: ViewModel, Navigation, Room
Code review & architecture consulting

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SDK & API Integration

Third-party integrations done right — with proper error handling, token refresh flows, and clean abstraction layers your team can work with.

Firebase (Auth, FCM, Analytics, Crashlytics)
Sentry crash monitoring setup
Payment gateway & social login integration
REST API integration with Retrofit + OkHttp

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Performance Optimization

App too slow? Too many crashes? I specialize in diagnosing and fixing the performance issues that kill user retention and Play Store ratings.

ANR & crash rate reduction via Android Profiler
Memory leak detection and resolution
Cold/warm start time optimization
Low-bandwidth optimization for emerging markets

Skills & Tech Stack

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Languages

Kotlin Java XML

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Architecture

MVVM Clean Architecture MVC Repository Pattern

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Jetpack Components

ViewModel LiveData Flow Navigation Room DB WorkManager

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Concurrency

Coroutines StateFlow SharedFlow RxJava (aware)

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Real-Time Communication

WebSockets Firebase RT DB Sendbird OkHttp WS

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Media & Streaming

Agora SDK Audio Call Video Call Live Streaming Agora SD-RTN™

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Firebase & Backend

FCM / Push Firebase Auth Cloud Firestore REST APIs Retrofit

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Monitoring & Analytics

Sentry Firebase Analytics Crashlytics Singular Facebook SDK OneSignal

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Tools & Workflow

Android Studio Android Profiler GitHub Bitbucket Jira Git Flow

Work Experience

DEC 2024 — PRESENT Current

AstroSansaar

Senior Android Engineer · Panchkula, Haryana

Built AstroSansaar from scratch across 3 apps (AstroSansaar, Krishi Suvidha, LegalFind) — grew to 100K+ installs through iterative, performance-driven releases.
Architected real-time chat (WebSockets + Firebase) and audio/video calling (Agora SDK) from the ground up, supporting live expert consultations at scale.
Designed a concurrent order queue system handling simultaneous service requests without race conditions — integrated 20+ REST APIs and 10+ third-party SDKs end-to-end.
Optimised app startup time and rendering performance using Android Profiler across a diverse device matrix spanning 5+ Android versions.
Owning the full release pipeline — crash triage via Sentry, production stability monitoring, and continuous delivery across multiple app variants.

AUG 2020 — NOV 2024 4+ Years · Lead Role

Dhawala Online Solutions Pvt. Ltd.

Lead Android Developer · Panchkula, Haryana

Built Suvich – The Real Astrology from scratch to 1M+ installs, 4.5★ rating, and 8,000+ reviews — delivered ~100 production releases at bi-weekly cadence while leading a 4–6 person Android team.
Owned the full real-time communication stack: live audio/video and live streaming (Agora SDK), real-time chat (Sendbird + Firebase), and notification-driven order acceptance across all Android lifecycle states.
Resolved ANR and memory issues via Android Profiler; maintained stability across 100+ device/OS combinations.
Integrated and maintained 10+ SDKs — Agora, Sendbird, Sentry, Firebase, Facebook SDK, Singular, OneSignal — each with proper abstraction and error handling.
Acted as sole decision-maker for all Android architecture and release decisions — collaborated directly with product, backend, and design teams every sprint.

SEP 2019 — MAY 2020 Early Career

Imark Infotech & WE ARE CODERS

Android Developer · Chandigarh / Dera Bassi

Contributed to early-stage Android app development (Selfpause at Imark); implemented and debugged core features collaborating across engineering, design, and product teams.
Gained foundational experience in team-based development workflows, code quality practices, and shipping features from concept to build.

Featured Projects

Astrology · Consumer · India

Suvich – The Real Astrology

Built from scratch to market leader over 4 years. Delivered ~100 bi-weekly production releases leading a 4–6 person team. Architected the complete real-time layer: live chat, 1-to-1 audio/video calls, and multi-user live streaming. Designed a concurrent order queue that ensures consultations are never dropped. Integrated 10+ SDKs and maintained stability across 100+ device/OS combinations.

1M+ Installs

4.5★ Rating

8K+ Reviews

KotlinMVVMAgora SDKSendbirdFirebaseSentrySingular

Play Store

Scan to install

Astrology · Consumer · India · 3-App Ecosystem

AstroSansaar

Built from scratch as a 3-app ecosystem (AstroSansaar, Krishi Suvidha, LegalFind). Architected WebSocket + Firebase real-time chat with reconnection logic, Agora audio/video calling, and a concurrent order queue system free of race conditions. Integrated 20+ REST APIs and 10+ SDKs. Reached 1.5 lakh installs through iterative, performance-driven releases.

1.5L+ Installs

Active In Production

KotlinClean ArchWebSocketsFirebaseAgoraJetpack

Play Store

Scan to install

AgriTech · Rural India

Krishi Suvidha (Agro Experts)

Agricultural expert consultation platform built for rural India's network realities. Implemented socket-based real-time chat optimized for intermittent connectivity. Integrated Agora SDK for audio/video expert calls. Every feature was stress-tested for low-bandwidth scenarios where users may be on 2G or unstable 4G.

KotlinWebSocketsAgora SDKLow-BW OptimizationFirebase

Play Store

Scan to install

Astrology · B2B · Expert-Facing

Suvich – For Astrologers

The expert-side companion app to Suvich. Built a sophisticated notification-driven order acceptance system that works reliably across all Android app states — foreground, background, and process-killed — ensuring astrologers never miss a consultation booking.

KotlinFCMFirebaseAgoraSendbirdFacebook SDK

Play Store

Scan to install

Legal Tech · Consumer

LegalFind

Consumer-facing legal services platform connecting users with legal professionals. Built at AstroSansaar as part of a multi-product Android ecosystem, sharing architecture patterns and component libraries with the core platform for faster delivery.

KotlinMVVMClean ArchREST APIsJetpack

What People Say

💡 Tip: Ask your manager at AstroSansaar or a team lead from Dhawala for a short LinkedIn recommendation — even 2–3 sentences about your work on Suvich would dramatically increase client trust.

"Tushar architected the entire real-time communication layer for Suvich — chat, calling, and live sessions. The app scaled to over a million users without the foundation ever cracking. He owned Android like it was his own product."

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Team Lead / CTO

Dhawala Online Solutions · Add real name here

"He delivered a production-quality Agora integration — audio calls, video calls, and live streaming — all within a single sprint cycle and with edge cases handled that we hadn't even thought of."

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Product Manager

AstroSansaar · Add real name here

⭐

Add a real testimonial here.
Reach out to a manager, stakeholder, or colleague on LinkedIn and ask for a short recommendation. One genuine quote here is worth more than 10 bullet points in your skills section.

Tushar Saini

About Me

What I Can Build for You

Skills & Tech Stack

Work Experience

Featured Projects

What People Say

Let's Build Something Great