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whoami

Santosh Kumar Behera

Lead Mobile Developer

Specialties: Flutter, Android, iOS, Java Spring Boot

Building secure, offline-first mobile apps that scale.

portfolio contact

about

Lead mobile engineer with 9+ years across Flutter, Android and iOS, delivering 15+ high-impact apps over Event-Tech SaaS, Fintech, Healthcare, EdTech, Telecom and Retail. Focused on secure, offline-first architecture, performance, and clean cross-platform delivery — alongside mentoring teams and leading the build process.

  • Application Development
  • Mobile Application Architecture
  • Cloud Integration
  • CI/CD Integration
  • Scalable Software Solutions
  • API Integration
  • Agile Methodologies
  • Team Leadership & Mentoring
  • ML & AI Integration
  • Software Development Life Cycle
  • Cross-Functional Collaboration
  • Stakeholder & Client Engagements

experience

  1. Expert Software Engineer (Team Lead)

    Sep 2025 — Present

    24/7 Software ● current

    • Lead the Event & Venue Management product module — maintenance, inspection, security and work-order features.
    • Drive team delivery and the build process; author PR-review guidelines and TDD documentation.
    • Own build planning, delivery and deployment with CI/CD configuration.
    • Run grooming and PO calls, breaking requirements into clear, ship-ready tasks.

  2. Systems Integration Senior Specialist

    Nov 2024 — Aug 2025

    NTT Data

    • Built and optimised high-performance Flutter applications for enterprise clients.
    • Modernised the British Telecom (BT) Business app — feature work and a UI/UX revamp in Flutter.
    • Collaborated across design, product, QA and backend to ship cohesive mobile modules.
    • Engaged directly with the client on requirements, solutions and delivery alignment.

  3. Senior Software Engineer

    Oct 2023 — Nov 2024

    Sunflower Lab

    • Designed and maintained cross-platform apps with Flutter, FlutterFlow and native Android (Java/Kotlin).
    • Mentored junior engineers and trainees on coding practices and architecture.
    • Partnered with cross-functional teams and clients to define and deliver features.

  4. Senior Software Engineer

    Jul 2021 — Oct 2023

    Bloom Consulting Services

    • Led end-to-end delivery of cross-platform Flutter and native Android apps across client domains.
    • Built native iOS apps with Objective-C and SwiftUI.
    • Acted as technical lead — requirement analysis, client communication and mentoring.

  5. Independent Consultant

    Jan 2017 — Jul 2021

    Independent

    • Delivered Flutter and native Android apps end-to-end for healthcare, education and e-commerce clients.
    • Assisted with backend integration — secure auth and efficient API communication.
    • Managed website setup and hosting (domain, DNS, deployment, WordPress/WooCommerce) for small businesses.

portfolio

15+ shipped and continuing…

Singletick

Privacy-first, zero-knowledge habit tracker — all data encrypted on-device; backups are blobs only the user can read.

  • Flutter
  • Riverpod
  • Isar (encrypted)
  • AES-256-GCM / Argon2id
  • Firebase
  • RevenueCat
Website

CMMS

Maintenance, inspection, security and work-order module inside an enterprise event & venue management product.

  • Flutter
  • BLoC
  • Couchbase
  • Datadog
  • sqflite
  • WebView
  • Server-driven Dynamic UI
Android iOS

BT Business

Migrated British Telecom’s enterprise app from native to Flutter with a revamped UI and new features.

  • Flutter
  • BLoC
  • GraphQL
  • Melos
Android

TOR (Teachers On Reserve)

Two mobile apps enabling gig creation and management for teachers and institutions.

  • Android
  • OkHttp
  • Tamper/Root detection
  • SSL Pinning
  • Firebase

CatScan

Offline-first object-scanning app using OCR and object detection, with automated sync and subscriptions.

  • Flutter
  • BLoC
  • OCR
  • SQLite
  • TensorFlow Lite
  • Isolate
  • MLKit
  • Push Notifications

Equibills

Low-code app for horse/barn service providers with custom code and in-app subscriptions.

  • Flutter
  • FlutterFlow
  • Firebase
  • RevenueCat
  • SSL Pinning
  • Push Notifications

Nurse Math

Medical-calculation app for nurses with tailored formulas and a subscription model.

  • Flutter
  • FlutterFlow
  • Firebase Firestore
  • In-app Subscriptions
  • Server-driven Dynamic Forms
Android iOS

Town Money Saver

Geo-based coupon app delivering location-aware offers for local business promotions.

  • Android
  • Volley
  • Firebase
  • SQLite
  • Google Maps
  • Current Location
  • Push Notifications
Android

UFOT

Two industrial handheld apps using barcode scanners and proprietary pattern-recognition APIs.

  • Android
  • Custom Barcode Scanner
  • OkHttp

Eureka Digibank

Credit-card service app with facial recognition and blur detection for enhanced security.

  • Flutter
  • Provider
  • Google MLKit
  • OCR
  • TensorFlow Lite
  • Hive DB
  • Isolate

TTSystems Vehicle Dashboard

Internal live-streaming app for Toyota with WebSocket alerts and live video-feed updates.

  • Flutter
  • BLoC
  • Firebase
  • WebRTC
  • WebSocket
  • Live Notifications

Flexiloans

NBFC loan-servicing app with full financial lifecycle integration and user onboarding.

  • Android
  • Firebase
  • OkHttp
  • Retrofit
  • AppsFlyer
  • Tamper/Root Detection
  • Google SafetyNet
  • SQLCipher
  • SSL Pinning
Android

Smazing

Social-networking app combining posts, chat, calling and e-commerce in one platform.

  • Flutter
  • Flutter Web
  • Dio
  • XML Parsing
  • VoIP
  • Firebase
  • Image manipulation

Parachute Kalpavriksha

Multilingual communication app for coconut farmers, traders and wholesalers, built for Marico.

  • Flutter
  • Provider
  • Push Notifications
  • Hive DB
  • Firebase
  • WebView
Android iOS

Npalm

Educational app offering nursing and medical training content in Singapore.

  • Android
  • iOS
  • SQLite
  • Realm DB
  • Root/Jailbreak/Tamper detection

tech stack

Programming Languages

Dart · Java · Kotlin · JavaScript · Swift · Objective-C · SQL · HTML · CSS

Mobile Development

Flutter · Flutter Web · Native Android · Native iOS

UI/UX Frameworks

Jetpack Compose · FlutterFlow · SwiftUI

Backend, Database & Services

Firebase · REST APIs · Java Spring Boot · GraphQL · Freezed · SQLite · Couchbase · SQLCipher · Hive · ObjectBox · Realm · Shared Preferences · Background Services · Google Maps · YouTube Data API · Swagger · Postman

Security & Encryption

Root Detection · Tampering Detection · Jailbreak Detection · Google SafetyNet · SQLCipher · Encrypted SharedPreferences · Keystore/Keychain Encryption · SSL Pinning

Machine Learning

TensorFlow Lite · Google MLKit · Face Detection · OCR Fuzzy Matching · Object Detection

Communication & Streaming

WebRTC · Bluetooth · HLS · DASH · WebSocket · Push/Local Notifications · Wi-Fi

State Management

BLoC · Cubit · Provider · GetX · Riverpod

Testing, Automation & Others

Isolates · Unit/Widget Testing · TDD · BDD · FVM · Shorebird · App Deep-linking · GitLab CI · GitHub Actions · Codemagic · OpenAI · Claude AI · AppsFlyer · Datadog · DigitalOcean · AWS · Figma

Development Environments

Android Studio · VS Code · Xcode · IntelliJ · Eclipse

Project Management Tools

GitHub · GitLab · Jira · Agile · Scrum · Kanban · Asana

contact

Open to interesting mobile work and collaborations. The fastest way to reach me: