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Available for Senior Roles & Consulting

Mahesh S
Mobile Architect

Senior Mobile Architect · 14+ Years · Android · Flutter · IoT

I architect and build enterprise-grade mobile applications that scale. From BLE-powered IoT platforms to Azure-integrated POS systems — I turn complex engineering challenges into elegant, maintainable solutions.

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0
Years Exp+
0
Projects+
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Flutter Yrs+
IoT
Enterprise

About Me

Engineer at Heart,
Architect by Practice

I began my career in Telecom Engineering in 2009, working with network protocols and hardware systems. By 2011, I had transitioned fully into software development — drawn by the power of mobile platforms to reshape how people interact with technology.

Over 14+ years, I've grown from writing Android apps in Java to architecting enterprise-grade mobile ecosystems that span Android, Flutter, IoT, cloud infrastructure, and secure BLE communication.

Today, I specialize in Clean Architecture, MVVM patterns, and leading technical teams to deliver scalable, maintainable mobile systems for enterprises, fintechs, and IoT product companies.

2009
Telecom Engineering
Network protocols, hardware systems, and embedded fundamentals
2011
Software Development
Transitioned to Android development with Java
2015
Enterprise Mobile & Architecture
MVVM, Clean Architecture, and enterprise POS systems
2018
IoT & BLE Systems
BLE device communication, Azure IoT Hub integration
2020+
Flutter & Cloud Architecture
Flutter enterprise apps, Azure B2C, AWS, and CI/CD pipelines

Key Achievements

🏗️
Architecture Lead Designed MVVM + Clean Architecture for 10+ enterprise apps
💳
POS Specialist Built secure payment platforms processing millions in transactions
📡
IoT Pioneer BLE-to-Azure IoT pipelines for enterprise device fleets
🔐
Security Focus Azure B2C auth, encrypted BLE, and secure storage patterns
🚀
CI/CD Automation GitHub Actions & GitLab pipelines for zero-downtime deploys
👥
Team Mentor Mentored 15+ junior and mid-level mobile engineers

Skills Dashboard

Technical Arsenal

14 years of continuous learning across mobile, cloud, and systems engineering.

🤖 Android Development
Kotlin Java Jetpack Compose Coroutines Flow Room DB WorkManager Navigation Component Hilt / Dagger Retrofit
Core Android (Java/Kotlin)95%
Jetpack Libraries90%
💙 Flutter Development
Dart Flutter BLoC Riverpod Provider Flutter Web Custom Widgets Platform Channels GetX
Flutter / Dart92%
State Management88%
🏛️ Architecture & Patterns
Clean Architecture MVVM Repository Pattern MVI MVP SOLID Principles DI Patterns Use Cases
☁️ Azure Cloud
Azure B2C Azure IoT Hub Azure Functions Azure AD MSAL Device Twins IoT Edge Service Bus
🟠 AWS
EC2 S3 Lambda CloudFront RDS Cognito SNS
⚙️ CI/CD & DevOps
GitHub Actions GitLab CI Fastlane Firebase Distribution Docker Play Store Deploy App Center
🗄️ Databases
SQLite / Room Firebase Firestore Realm PostgreSQL MongoDB Shared Preferences Encrypted Storage
📡 BLE & IoT
BLE GATT Android BLE API MQTT Device Firmware Update BLE Scanning AMQP WebSocket NFC

Career Journey

Experience Timeline

15 years of progressive responsibility across telecom, enterprise, and product companies.

2022 – Present
Senior Mobile Architect
Enterprise IoT & Payments Division
Leading architecture design for a suite of enterprise Android and Flutter applications. Own the technical roadmap for mobile platforms across IoT device management, secure BLE communication, and POS payment processing. Mentor a team of 8 mobile engineers, establish code review standards, and drive CI/CD automation.
KotlinFlutterClean ArchitectureAzure IoTBLE GATTGitHub Actions
2019 – 2022
Senior Mobile Developer
Fintech & Enterprise Solutions
Delivered end-to-end mobile POS payment systems with EMV compliance, PIN entry device integration, and receipt management. Built Azure B2C authentication flows and integrated Azure IoT Hub for real-time device telemetry on Android and Flutter.
Android (Kotlin)FlutterAzure B2CMVVMEMV / POS
2015 – 2019
Android Developer
Mobile Products Studio
Built consumer-grade and enterprise Android applications with a focus on offline-first architecture, background sync, and BLE peripheral integration. Introduced repository pattern and introduced unit testing standards across a team of 5 developers.
Android Java/KotlinRoom DBBLEAWS S3/EC2GitLab CI
2011 – 2015
Software Developer (Android)
Mobile Software Company
Transitioned from telecom into Android development. Built consumer applications with Java, integrated REST APIs, implemented push notifications, and learned UI/UX fundamentals for mobile. Shipped 5+ apps to Google Play Store.
Android JavaREST APIsSQLiteGoogle Play
2009 – 2011
Telecom Engineer
Telecommunications Industry
Worked with network infrastructure, protocol analysis, and embedded systems for telecom hardware. Built foundational skills in low-level communication protocols that later proved invaluable for BLE and IoT development.
Network ProtocolsEmbedded SystemsC/C++Hardware Integration

Featured Work

Enterprise Projects

Complex real-world systems built for reliability, security, and scale.

Fintech · Android
Enterprise POS Payment Platform
Legacy cash register systems couldn't integrate with modern payment rails. Needed a mobile-first POS solution with EMV compliance, offline fallback, and multi-terminal sync.
Architecture
MVVM + Clean
Platform
Android (Kotlin)
Kotlin Room DB EMV Azure B2C Coroutines Hilt
Processing $2M+ monthly across 200+ terminals with 99.9% uptime
IoT · Cloud
Azure IoT Device Management
Enterprise needed real-time visibility and remote control of 5,000+ IoT devices spread across 50 locations, with OTA firmware updates and telemetry dashboards.
Architecture
Clean + Repository
Platform
Flutter + Azure
Flutter Azure IoT Hub MQTT Device Twins BLoC WebSocket
Reduced device downtime by 40% through proactive telemetry alerts
BLE · Embedded
BLE Device Programming Platform
Field technicians needed a way to configure, update firmware, and run diagnostics on Bluetooth peripherals without carrying laptops or specialized hardware.
Architecture
MVVM + Repository
Platform
Android (Kotlin)
BLE GATT DFU Kotlin Coroutines WorkManager
Eliminated 80% of field truck-rolls; technicians self-serve in under 5 minutes
Enterprise · Flutter
Enterprise Field Service App
500+ field technicians needed offline-capable work order management with GPS tracking, photo documentation, and automatic cloud sync when connectivity returned.
Architecture
Clean + Offline-First
Platform
Flutter (iOS + Android)
Flutter Riverpod SQLite AWS S3 Push Notifications
Reduced work order completion time by 35% with real-time sync
Banking · Security
Secure Banking Mobile App
Banking client required a mobile app with biometric authentication, certificate pinning, encrypted local storage, and jailbreak/root detection to meet PCI-DSS compliance.
Architecture
MVVM + Security Layer
Platform
Android (Kotlin)
Biometrics EncryptedSharedPref Certificate Pinning Azure B2C MSAL
Achieved PCI-DSS Level 2 compliance; zero security incidents in 2 years
Smart Building · Flutter
Smart Building Control Dashboard
Facility managers needed a unified tablet dashboard to control HVAC, lighting, access control, and energy systems across a campus of 12 buildings via IoT sensors.
Architecture
Clean + Event-Driven
Platform
Flutter Web + Tablet
Flutter Web BLoC MQTT WebSocket Azure IoT
20% reduction in energy consumption via automated scheduling algorithms

Architecture Case Studies

System Design Patterns

Architectural patterns I've implemented and evolved across real production systems.

Why this approach: Clean Architecture enforces strict separation so the domain layer has zero knowledge of Android SDK or network libraries. This means business logic is fully unit-testable, frameworks can be swapped, and onboarding new developers is 60% faster because every feature follows the same directory structure and flow pattern.
Key design decision: Using MSAL's token cache with EncryptedSharedPreferences ensures tokens survive app restarts while remaining protected by device keystore. Silent token refresh happens proactively before expiry, delivering a seamless user experience without repeated login prompts.
Offline-first design: The payment system maintains a local transaction queue in Room DB, allowing the terminal to continue processing sales during network outages. On reconnect, automatic reconciliation syncs with the cloud while the EMV kernel handles card-present fraud prevention independently.
Reliability pattern: BLE connections are managed through a state machine that handles reconnection, GATT refresh, and MTU negotiation. Device Twins in Azure IoT Hub act as a persistent shadow state — the mobile app can read the last-known device configuration even when the device is offline or out of BLE range.

What I Bring

Technical Expertise

Mobile Architecture
Design scalable, maintainable app architectures using Clean Architecture, MVVM, and Repository patterns. Every system I architect can be extended by any developer on the team without breaking existing contracts.
Enterprise Development
Deep experience with enterprise-grade requirements: offline-first sync, multi-tenant auth, audit trails, role-based access, and integration with legacy ERP systems via REST and SOAP APIs.
Performance Optimization
Diagnose and fix ANRs, memory leaks, jank, and excessive battery drain. Use profiling tools (Systrace, Android Profiler, Dart DevTools) to reduce app startup time and smooth 60fps rendering.
Mobile Security
Implement certificate pinning, encrypted storage using Android Keystore, biometric authentication, root/tamper detection, and secure BLE pairing to meet PCI-DSS and enterprise security policies.
Code Reviews & Quality
Conduct thorough code reviews focused on architecture adherence, naming clarity, test coverage, and edge-case handling. Establish team-wide coding standards using Detekt, ktlint, and custom lint rules.
Team Mentoring
Mentor junior and mid-level developers through pair programming, architecture walkthroughs, and structured feedback sessions. Help teams go from writing features to designing systems.

Credentials & Learning

Certifications

AZ-900: Azure Fundamentals
Microsoft
2022
Associate Android Developer
Google
2020
Flutter Development Bootcamp
Udemy / Google Flutter Team
2020
Mobile App Security Essentials
OWASP / SANS
2021
AWS Cloud Practitioner
Amazon Web Services
2023
IoT Architecture Fundamentals
Microsoft Learn
2021

Thought Leadership

Technical Writing

Sharing hard-won learnings from the trenches of enterprise mobile development.

Android Architecture
Android Clean Architecture in 2024: What Still Holds and What's Changed
Clean Architecture was designed before Coroutines existed. Here's how to reconcile the original layering with modern Kotlin idioms, Hilt, and StateFlow without losing testability.
8 min read Mobile Architecture
Flutter Enterprise
Flutter for Enterprise: Patterns That Don't Fall Apart at Scale
Most Flutter tutorials stop at the todo app. This is about building 100K-line Flutter applications that 10 developers can work on simultaneously without stepping on each other.
12 min read Flutter
Azure IoT
Connecting Android to Azure IoT Hub: A Complete Production Guide
Beyond the SDK README — handling device twins, direct methods, and connection reliability in a real app with background sync, offline buffering, and reconnection strategies.
15 min read IoT · Azure
POS Systems
Building a POS System on Android: EMV, Offline Queues, and Why It's Harder Than It Looks
Payment processing on Android sounds simple until you encounter EMV fallback scenarios, partial authorizations, and split-tender edge cases. A practitioner's field guide.
18 min read Fintech · Android
BLE Communication
The Definitive Guide to Reliable BLE Communication on Android
BLE on Android is notoriously fragile. GATT cache invalidation, MTU mismatches, manufacturer quirks — here's the state machine that finally made our connections production-stable.
20 min read BLE · Android
CI/CD
Zero-Touch Mobile CI/CD: GitHub Actions Pipelines That Actually Work
From code push to Play Store in under 20 minutes. Covers code signing, build flavors, automated testing on emulators, Slack notifications, and staged rollouts — all in YAML.
10 min read DevOps · Mobile

What People Say

Testimonials

Mahesh redesigned our entire Android codebase from scratch using Clean Architecture. Within 3 months, our release cycle went from 6 weeks to 1 week, and critical bug rates dropped by over 70%. He doesn't just write code — he thinks in systems.
Arun Kumar
VP Engineering, Fintech Startup
The BLE device programming platform Mahesh built replaced a process that required specialized hardware and trained technicians. Now any field tech with an Android phone can configure, update, and diagnose our devices in minutes. It's been transformative.
Priya Mehta
Director of Product, IoT Company
Working with Mahesh elevated our entire Flutter team. His architecture reviews aren't just about finding bugs — they're teaching moments that stick. Three months after he joined, our junior devs were writing code we'd have been proud of at the senior level.
Ravi Shankar
CTO, Enterprise SaaS

Let's Connect

Get In Touch

Open to senior mobile architecture roles, technical consulting, and IoT project collaboration.

Whether you're building an enterprise mobile platform from scratch, need an architecture review of an existing system, or are looking for a technical lead for your next Flutter or Android project — let's talk.

mahesh.s@email.com linkedin.com/in/mahesh-s github.com/mahesh-s
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