Real-Time Systems · Matrix Protocol · WebRTC

Saylee Bharsakle

software engineer — real-time systems & cross-platform applications, Pune

I build the infrastructure most engineers never get asked to touch — encrypted chat, live calls, screen sharing, the layer that has to work perfectly or not at all. That's the work I go looking for.

Three years in, most recently at iQ Innovations Hub, I architected and delivered a full Matrix Protocol + WebRTC communication suite for a U.S. enterprise client, end to end: E2EE messaging, video/audio calling, screen sharing, and call recording, from a single Flutter codebase across Android, iOS, and Web. Production meant going past Flutter itself — 1,000+ lines each of native Swift and Kotlin — to fix platform-level conflicts nobody warns you about: screen recording fighting the WebRTC capture pipeline, iOS silently killing push delivery on background transitions.

I work directly with client stakeholders, not through a delivery layer — architecture calls through production deployment, across distributed and cross-border teams. And I write about the systems I build, because a system I can explain clearly is one I actually understand.

Status

Open to full-time, contract, and consulting work — real-time communication infrastructure, cross-platform architecture, and technical delivery for teams that need someone to own a system, not just implement a ticket.

Work

Hotel365 Matrix AppShreem Capital, USA

Secure communication suite — E2EE messaging, WebRTC calling, screen sharing, call recording, self-hosted Sygnal push. The flagship engagement: real-time systems depth rarely handed to a mobile engineer, delivered end to end with direct client ownership.

Flutter · Matrix SDK · WebRTC · native Swift/Kotlin
IICS Customer AppARTUS GmbH, Germany

Insurance self-service portal — claims, contracts, and document management for a European insurer, one codebase across Android, iOS, and Web. WebView OAuth, encrypted token storage, German/English localization.

Flutter · BLoC · dartz · flutter_secure_storage
Hotel365 WebiQ Innovations Hub

15+ dashboard modules for hotel GMs and revenue managers on Next.js App Router with Server Components — multi-tenant, AI-generated daily briefings, Chart.js analytics.

Next.js · TypeScript · Tailwind
Planet ClientiQ Innovations Hub

A config-driven widget factory that renders UI entirely from API configuration — new tenants, zero code changes.

Flutter · BLoC · Hive
DTP AgriiQ Innovations Hub

B2B agritech platform with role-specific dashboards for farmers, packers, and exporters — MLKit OCR document capture, live GPS tracking, biometric auth.

Flutter · GetX · MLKit OCR
TraverseiQ Innovations Hub

Social travel app. Independently researched and shipped Unity AR destination previews embedded into Flutter via Method Channels — rarely delivered in production Flutter apps.

Flutter · Unity AR · Mapbox

Writing

Building E2EE Chat in Flutter with the Matrix SDK long-form
Olm/Megolm, key management, cross-signing, device trust
Video Calling in Flutter: WebRTC + Matrix medium
RTCVideoRenderer, Mesh vs LiveKit, production checklist
What Is End-to-End Encrypted File Sharing? medium
AES-256 per file, Megolm key distribution, rate limits
Voice Calling in Flutter: A Complete Guide medium
Call state machine, TURN setup, iOS audio routing
What Is the Matrix SDK? medium
Protocol, SDK features, integration approaches
Every Dashboard Said Success medium
A production debugging story — four stacked bugs, zero errors