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Manisini Chakraborty

@manisinichakraborty

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I build secure mobile and backend experiences for Microsoft Defender across iOS and Android.

India

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At Microsoft, I build secure Microsoft Defender experiences across iOS, Android, and backend systems. I've delivered JIT onboarding with Microsoft Authenticator, GDPR-ready telemetry migration to European regions, and security remediation for approximately 15 vulnerabilities.

I've improved Defender accessibility compliance, modernized Android UI with Jetpack Compose, built production scan-scheduling services, and created an AI-powered troubleshooting assistant. I also build mobile products independently, including a globally shipped Android arcade game in Godot.

Experience

Work history, roles, and key accomplishments

Current

iOS Engineer

Current

Microsoft

Aug 2024 - Present (2 years 1 month)

Engineered an end-to-end JIT onboarding flow for Defender in collaboration with the Microsoft Authenticator team, handling source-app and login-hint retrieval from Keychain, Defender launch and silent onboarding, compliance verification, and post-compliance redirection to the originating M365 application via the MSAL SSO extension. Led initiatives to obfuscate and protect embedded SDK API keys, dr

iOS Swift Objective C SwiftUI UIKit MSAL (Microsoft Authentication Library)Keychain Azure DevOps GitHub Co Pilot Power BI KQL GDPR Accessibility

Current

Software Engineer

Current

Microsoft

Jul 2022 - Present (4 years 2 months)

Software Engineer with deep mobile expertise (iOS and Android) and meaningful experience across backend systems, authentication, security, privacy, telemetry, and compliance, primarily within the Microsoft Defender ecosystem.

iOS Android Swift Objective C Kotlin Java C#C C++Python SQL KQL SwiftUI UIKit Jetpack Compose ASP.NET Core Azure Data Explorer (ADX)Power BI Azure Service Fabric Firebase

Android Engineer

Microsoft

Apr 2023 - Aug 2024 (1 year 4 months)

Replaced hardcoded split-tunneling logic with user-configurable include/exclude controls for Defender for Individuals users. Designed and implemented telemetry for split-tunneling behavior, implemented push notification delivery using Firebase Cloud Messaging, and led migration of key UI surfaces from XML layouts to Jetpack Compose.

Android Kotlin Java Jetpack Compose Firebase Cloud Messaging XML Telemetry

Backend Engineer

Microsoft

Jul 2022 - Mar 2023 (8 months)

Developed core logic for a production-facing scan scheduling microservice in a Service Fabric cluster to trigger periodic database scans and push notifications based on VPN usage thresholds. Mitigated a customer-facing Denial-of-Service vulnerability by implementing request-header-size validation in a live router authentication workflow.

C#ASP.NET Core Azure Service Fabric SQL Security Threat Modeling