๐ Senior Android & iOS Developer with 11+ years of experience building reliable, scalable, and production-ready mobile applications.
I specialize in native Android and iOS development, helping startups, businesses, and product teams build high-quality mobile applications from concept to production.
My experience includes Android development with Kotlin & Jetpack Compose, iOS development with Swift & SwiftUI, IoT/BLE integrations, REST APIs, Firebase, push notifications, background processing, and hardware/device communication.
โโโโโโโโโโโโโโโโโโโโโโโ
๐ง Core Technical Expertise
โโโโโโโโโโโโโโโโโโโโโโโ
Android Development
โข Kotlin / Java
โข Jetpack Compose
โข Android SDK
โข MVVM / MVI / Clean Architecture
โข Kotlin Coroutines / Flow / StateFlow
โข Hilt / Dagger
โข Room Database
โข WorkManager
โข Retrofit / REST APIs
โข Android SDK & AAR Development
iOS Development
โข Swift
โข SwiftUI
โข UIKit
โข MVVM Architecture
โข REST API Integration
โข Firebase
โข Push Notifications / APNs
โข WKWebView
โข App Store Deployment
IoT & Device Integration
โข Bluetooth / BLE
โข IoT Device Communication
โข RS232 / Serial Device Integration
โข Hardware-to-Mobile Communication
โข BLE Data Chunking & MTU Handling
โข Background Device Communication
โข Device Connection & Reconnection Handling
โข Custom Communication Protocols
Backend & Cloud Integration
โข REST APIs
โข Firebase
โข Supabase
โข Authentication
โข Push Notifications
โข Third-party API Integration
Development & Release
โข Git / GitHub
โข CI/CD
โข Firebase Crashlytics
โข Google Play Console
โข App Store Connect
โข TestFlight
โข Production Release Management
โโโโโโโโโโโโโโโโโโโโโโโ
๐ผ What I Can Build For You
โโโโโโโโโโโโโโโโโโโโโโโ
โ Native Android Applications
โ Native iOS Applications
โ Android & iOS Apps from Scratch
โ IoT & BLE Mobile Applications
โ RS232 / Serial Hardware Integrations
โ Healthcare & E-commerce Applications
โ Enterprise Mobile Applications
โ API & Firebase Integrations
โ Custom Android SDKs
โ Existing App Maintenance & Modernization
โ Jetpack Compose & SwiftUI Migration
โ Google Play & App Store Releases
โโโโโโโโโโโโโโโโโโโโโโโ
โก Why Work With Me
โโโโโโโโโโโโโโโโโโโโโโโ
โข 11+ years of professional mobile development experience
โข Strong expertise in native Android development
โข Android + iOS development capabilities
โข Hands-on IoT, BLE, and device integration experience
โข Clean, scalable, and maintainable architecture
โข Experience working on real production applications
โข Strong debugging and performance optimization skills
โข Comfortable working with existing and complex codebases
โข Clear communication and regular project updates
โข Available for both short-term and long-term projects
โโโโโโโโโโโโโโโโโโโโโโโ
๐ Letโs Build Your Mobile Product
โโโโโโโโโโโโโโโโโโโโโโโ
Whether you need a new Android/iOS application, IoT device integration, BLE connectivity, an existing app upgraded, or help getting your application production-ready, I can help you build a reliable solution.
Available for:
โ Android Development
โ iOS Development
โ Kotlin / Jetpack Compose Projects
โ Swift / SwiftUI Projects
โ IoT & BLE Integrations
โ RS232 / Serial Device Integrations
โ App Maintenance & Bug Fixing
โ Long-term Mobile Development
MERN Stack
React
Next.js
ExpressJS
Node.js
JavaScript
TypeScript
Tailwind CSS
SaaS Development
MongoDB
Web Development
Responsive Design
Socket.io
Websockets
Third-Party Integration
Front-End Development
Back-End Development
Full-Stack Development
Lalith K.
Hyderabad, India
$15/hr
4.5
23 jobs
Are you building an IoT product and need firmware that actually works in the field? I'm Lalith, an Embedded Firmware Engineer with 3+ years of hands-on experience delivering production-grade firmware for IoT devices.
I specialize in:
Microcontrollers: STM32, ESP32, ESP32-S2/S3, nRF5340, Raspberry Pi
Protocols: SPI, I2C, UART, BLE, MQTT, HTTP/HTTPS, USB, Ethernet
RTOS & Bare-Metal: FreeRTOS, Zephyr RTOS, DMA, OTA, Secure Boot
Tools: ESP-IDF, STM32CubeIDE, PlatformIO, Balena OS
I've worked across the full product lifecycle โ from driver development and sensor integration to test firmware, production support, and OTA updates. My work at Alomind Labs and Adapt Ideations gave me deep experience building reliable IoT data loggers, and I currently deliver embedded products as a contractor at Spastha Dynamics.
On Upwork, I've built a strong track record with clients across the globe, consistently delivering quality firmware on time. If you need someone who understands both the hardware and the software side of embedded systems, let's talk.
ESP32
Arduino
Embedded System
Embedded C
PIC
FreeRTOS
Proteus Design Suite
EasyEDA
Electronic Circuit Design
Internet of Things
nRF52
Shubham M.
Hyderabad, India
$25/hr
5.0
3 jobs
Helping Businesses Build Scalable, Secure & Revenue-Generating iOS Apps
Are you looking for a seasoned iOS expert to develop a high-performance mobile application that drives engagement, revenue, and growth? With 12+ years of experience, I have helped businesses scale their digital products by delivering secure, high-performing iOS solutions with seamless integrations across BLE, IoT, FinTech, and enterprise ecosystems.
๐น Specializing in:
โ Smart Devices & IoT Apps โ BLE-powered real-time connectivity & automation
โ FinTech & Payment Solutions โ Secure, seamless Apple Pay, Stripe, and Razorpay integrations
โ Enterprise-Grade iOS Development โ Scalable architectures, CI/CD automation, and cloud-based solutions
โ watchOS & Health Tech โ Apple Watch apps with motion tracking, safety alerts & health data processing
โ Performance Optimization & Security โ Reducing crashes, securing data, and enhancing user experience
๐น Core Technical Expertise
โ Programming & Frameworks: Swift, SwiftUI, Objective-C, UIKit, Combine
โ Architectures: VODOO, VIPER, MVVM, Clean Architecture, Modularization
โ Bluetooth & IoT: Core Bluetooth, BLE peripherals & central integration, real-time connectivity
โ Concurrency & Performance Optimization: GCD, Operations, async/await, Instruments profiling
โ Networking & APIs: RESTful APIs, WebSockets, URLSession, Alamofire
โ Data Management & Storage: SwiftData, Core Data, Realm, SQLite, Firebase Firestore
โ Security & Authentication: OAuth, Keychain, biometric authentication, data encryption
โ CI/CD & DevOps: Fastlane, Jenkins, GitHub Actions, Bitrise for automated testing & deployment
๐น Business Impact & Success Stories
๐ Smart Helmet Safety Apps โ Reduced false crash alerts by 30%, improved BLE connectivity for 20K+ users
๐ฐ Airtel Payment Bank โ Developed a secure mobile banking & payment gateway, increasing transactions by 25%
๐ OYO Hotel Booking โ Enhanced booking experience, reducing transaction failures by 30%
โก PitchVision Sports Analytics โ Built a real-time match tracking & video analytics platform
โ watchOS Health & Safety Apps โ Integrated motion tracking & BLE synchronization, improving data transfer efficiency by 25%
๐น Why Businesses Choose Me?
โ Results-Driven Approach โ Focused on business impact, scalability & ROI
โ 12+ Years of Experience โ Deep expertise in Swift, SwiftUI, Core Bluetooth, iOS, watchOS
โ Certified Scrum Master (CSM) โ Experience leading teams, managing sprints & delivering efficiently
โ Proven Success in Scaling Apps โ Built 40+ apps with millions of downloads
โ Scalable & Maintainable Code โ Expert in modern architectural patterns for long-term stability
โ Deep BLE & IoT Expertise โ Optimized Core Bluetooth for smart devices & wearable tech
โ App Store Compliance & Optimization โ Experienced in app submission, ASO, and performance tuning
๐ก Looking to build a cutting-edge iOS app that drives business growth? Letโs discuss your vision. ๐
SwiftUI
iOS Development
watchOS
iPadOS
Swift
Core Bluetooth
RESTful API
Core Data
Scrum
MapKit
Firebase
In-App Purchases
In-App Subscription
Geolocation
App Store Upload
Salman A.
Hyderabad, India
$40/hr
5.0
9 jobs
11+ years building production grade embedded systems for Volvo, ZF, and Daimler. I design & develop custom PCBs and ship complete hardware + firmware products for IoT, EV, and automotive clients. ๐ข๐ป๐ฒ ๐ฒ๐ป๐ด๐ถ๐ป๐ฒ๐ฒ๐ฟ, ๐๐ฒ๐ฟ๐ผ ๐ต๐ฎ๐ป๐ฑ๐ผ๐ณ๐ณ ๐ฑ๐ฒ๐น๐ฎ๐๐.
I eliminate the hardware-software gap that kills most embedded projects. You get a single engineering partner who handles schematic design through production firmware. No miscommunication between separate HW and SW contractors, no integration blame games, and no schedule slips.
๐ฃ๐ฟ๐ผ๐ท๐ฒ๐ฐ๐ ๐ช๐ผ๐ฟ๐ธ๐ณ๐น๐ผ๐:
* Flexible engagement: clear fixed-price milestones or hourly tracking
* NDA signed before project kickoff to protect your IP
* Transparent milestone timelines and regular progress updates
* Complete manufacturing handoff (DFM/Gerber files ready for your preferred fab)
* Optional long-term support and firmware maintenance
๐๐ฎ๐ฟ๐ฑ๐๐ฎ๐ฟ๐ฒ ๐๐ฒ๐๐ฒ๐น๐ผ๐ฝ๐บ๐ฒ๐ป๐:
* Schematic design and PCB layout (KiCad)
* Component selection, BOM optimization, cost engineering
* Design for Manufacturing (DFM) and Design for Assembly (DFA)
* Board bring-up, prototype validation, hardware debugging
* Manufacturing support, EMC/ESD pre-compliance guidance
๐๐ถ๐ฟ๐บ๐๐ฎ๐ฟ๐ฒ ๐๐ฒ๐๐ฒ๐น๐ผ๐ฝ๐บ๐ฒ๐ป๐:
* AUTOSAR stack: MCAL, ECU Abstraction, Services, Com, NvM, EcuM, DEM/DTC Diagnostics, CDD, RTE, ASW integration
* Bare-metal and RTOS: FreeRTOS, Zephyr, task scheduling, queues, semaphores, ISR handling
* Low level drivers, bootloaders, complex device drivers, low-power optimization, schedulers, state machines.
* Production-ready architecture, MISRA-C, ASPICE-compliant processes
๐ฃ๐น๐ฎ๐๐ณ๐ผ๐ฟ๐บ๐: STM32, ESP32, NXP S32K1xx/S32K344, Renesas RH850/RA4M1, Infineon TC2xx/TC3xx/XMC1100/XMC4500, Atmel SAM/Mega/Xmega
๐ฃ๐ฟ๐ผ๐๐ผ๐ฐ๐ผ๐น๐: CAN, CAN FD, LIN, BLE, Wi-Fi, USB, SPI, I2C, UART, RS-485, UDS, OBD-II, XCP, SAE J1939 protocol
๐ฆ๐ฒ๐ป๐๐ผ๐ฟ๐ & ๐๐ฐ๐๐๐ฎ๐๐ผ๐ฟ๐: Temperature, Pressure, HALL, Current, Wheel Speed, Ultrasonic, PM2.5, KL15/Ignition; Brushed DC, Stepper, BLDC Motors, LIN motors, Solenoids, Relays, ASICs, NCV7240/7720/7726B
๐ง๐ฟ๐ฎ๐ฐ๐ธ ๐ฅ๐ฒ๐ฐ๐ผ๐ฟ๐ฑ:
* Volvo Cars: Platform software for next-gen Zone Controller ECUs, Ethernet zonal architectures, ISO 26262 ESM and Safety-at-Init checks
* ZF: Real-time braking control firmware across multiple ASIL levels, sensor/actuator adaptation for Geely programs
* BHTC: Climate control systems for Daimler, Renault-Nissan, Hyundai, Geely, MAN Trucks; 40% effort reduction via configurable architecture
* Startup projects: Complete hardware + firmware products from schematic to manufacturing for IoT and automotive clients
๐ง๐ผ๐ผ๐น๐: KiCad, CANoe, CANape, Trace32/Lauterbach, PC-Lint, QAC, VectorCast, Polyspace, Tessy, MATLAB/Simulink, IBM Rational DOORS, PTC Integrity (MKS), GIT, Gerrit, IAR Workbench, STM32 CubeIDE, WinIdea, Multi, oscilloscope, logic analyzer
Top Rated on Upwork. Published patent holder.
Send me your project details and I'll respond within a few hours.
๐๐ฒ๐๐๐ผ๐ฟ๐ฑ๐: embedded hardware design, PCB layout, KiCad, schematic design, BOM optimization, DFM, DFA, board bring-up, prototype validation, manufacturing support, EMC testing, ESD protection, firmware development, AUTOSAR, MCAL, ECU abstraction, RTE, ASW, CDD, DEM, DTC diagnostics, Com stack, NvM, EcuM, ISO 26262, ASPICE, MISRA-C, bare metal programming, FreeRTOS, Zephyr RTOS, STM32, ESP32, NXP S32K, S32K344, Renesas RH850, RA4M1, Infineon TC2xx, TC3xx, AURIX, XMC1100, XMC4500, Atmel SAM, AVR Mega, AVR Xmega, GPIO, SPI, UART, USB, I2C, CAN, CAN FD, LIN, PWM, timers, clock, ADC, watchdog, temperature sensor, pressure sensor, HALL sensor, current sensor, wheel speed sensor, ultrasonic sensor, PM2.5 sensor, KL15 ignition, brushed DC motor, stepper motor, BLDC motor, LIN motor, solenoid, relay, ASIC, NCV7240, NCV7720, NCV7726B, motor control, HVAC actuator, position feedback, BLE, Wi-Fi, RS-485, UDS, OBD-II, XCP, hardware software integration, Trace32, Lauterbach, CANoe, CANape, PC-Lint, QAC, VectorCast, Polyspace, Tessy, MATLAB Simulink, IBM Rational DOORS, PTC Integrity, MKS, GIT, Gerrit, IAR Workbench, STM32 CubeIDE, WinIdea, Multi, oscilloscope, logic analyzer, Volvo, ZF, Daimler, Renault Nissan, Hyundai, Geely, MAN Trucks, Mahindra, zone controller, Ethernet, braking control, climate control, IoT hardware, EV electronics, industrial automation, embedded systems consultant, patent, SAE J1939 protocol, Top Rated.
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Kinetic Investments
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Summa Linguae
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