Hire the Best Bluetooth Freelancers in Dhaka, BD

🚀 Need a Senior Flutter Developer who can take your app from idea to production—or fix and scale an existing application? I'm a Senior Flutter Developer with 5+ years of dedicated Flutter experience and 10+ years across software, mobile, IoT, and product development. I build scalable, production-ready iOS and Android applications with a strong focus on clean architecture, performance, reliability, and excellent user experience. I've worked on applications across fintech, banking, real-time trading, BLE/IoT tracking, e-commerce, fitness, education, and POS systems. WHAT I CAN HELP YOU WITH: • Flutter app development from scratch • Existing Flutter app fixes, upgrades & performance optimization • Clean Architecture, BLoC, Riverpod & scalable codebases • Firebase integration • REST API & GraphQL integration • BLE / Bluetooth Low Energy & IoT integrations • Native iOS (Swift) & Android (Kotlin) integrations • Real-time data & complex application workflows • App Store & Google Play deployment • CI/CD, debugging & production issue resolution • AdMob integration & app monetization SELECTED PROJECT EXPERIENCE: 🏆 CyberTeens — Anti-cyberbullying platform associated with the International Children's Peace Prize 2020 📍 Talash — Child-safety application with real-time BLE tracking 📡 iTag — BLE hardware-connected tracking app generating $1,000+/month in sustained ad revenue 🏦 Citytouch — Contributed to enterprise mobile banking software 📈 Sixer — High-throughput real-time gold trading and financial market platform 🤖 Runora — AI-powered running, fitness, and workout tracking application 🍕 Pizzahjälpen — Swedish restaurant ordering and POS ecosystem Beyond coding, I've led Flutter engineering teams, reviewed architecture and code, established development standards, mentored developers, and helped teams turn product requirements into reliable production releases. I care about writing maintainable code—not just making something that "works." If you're building a serious Flutter product, integrating complex APIs or hardware, struggling with an existing codebase, or need an experienced developer who can take ownership of your mobile application, send me a message. Let's discuss what you're building. 🚀

My childhood hobby was taking something apart and putting it back together. As I grew older, I became fascinated with electronics and completed BSC on EEE. Over the last 10 years I have developed some consumer and IoT products for RISO, ME-Solshare Ltd, Walton Micro-Tech Corporation, Sinetek Ltd, ERROR Lab and I've acquired some rather unique skills along the way in embedded systems, RF/wireless, and harsh environment systems. In most of my projects I have developed firmware using TTD (Test-driven development), maintained firmware versions properly by git and followed industry best practices. 𝐌𝐲 𝐒𝐤𝐢𝐥𝐥𝐬: • 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞𝐬: C, C++, and Python • 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐎𝐒: Embedded Linux, Free RTOS, and Amazon free RTOS • 𝐏𝐫𝐨𝐭𝐨𝐜𝐨𝐥𝐬: UART, SPI, I2C, RS485, and WG26 • 𝐖𝐢𝐫𝐞𝐥𝐞𝐬𝐬: WIFI, BLE, GSM, GPRS, IR & RF • 𝐌𝐢𝐜𝐫𝐨𝐜𝐨𝐧𝐭𝐫𝐨𝐥𝐥𝐞𝐫𝐬: STM32, ESP32, Nordic, PIC and AVR • 𝐃𝐞𝐯 𝐁𝐨𝐚𝐫𝐝𝐬: Arduino (Uno, Mini, and Mega), STM37H745, NUCLEO-F070RB, ESP32 Devkit, NRF52840-DONGLE • 𝐆𝐔𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: TouchGFX • 𝐏𝐂𝐁 𝐃𝐞𝐬𝐢𝐠𝐧𝐢𝐧𝐠: Proteus, Altium • 𝐒𝐢𝐦𝐮𝐥𝐚𝐭𝐢𝐨𝐧: Proteus, Multisim, LTspice • 𝐒𝐜𝐡𝐞𝐦𝐚𝐭𝐢𝐜 𝐃𝐞𝐬𝐢𝐠𝐧: Designed SMPS, Inverter, and some circuits for home automation, IoT energy meter, IoT Attendance Machine and home appliance products. • 𝐂𝐢𝐫𝐜𝐮𝐢𝐭 𝐓𝐞𝐬𝐭𝐢𝐧𝐠: Performed circuit analysis, signal integrity, and reliability testing of different circuits. I have a lab at home with all the necessary hardware/firmware development equipment including oscilloscopes, signal generators, power supplies, power loggers, uA meters, soldering stations, development boards, etc. It's highly likely I have already worked with the technologies you need to make your project successful. Thank you for taking time to consider me for your project.

Firmware is where most IoT projects stall — not at the concept stage, but in the gap between a working prototype and a device that runs reliably in the field for years. That gap is where I work. I build production-grade embedded firmware for consumer IoT and utility management devices. My focus is reliability, low power, and owning the full firmware stack: from peripheral drivers and RTOS architecture through to OTA update pipelines and cloud integration. With 8+ years of experience across the full development cycle, I'm comfortable taking a project from board bring-up to field deployment, or stepping in as a senior contributor on an existing team. CORE SKILLS: Platforms: Nordic nRF52, ESP32, STM32 RTOS: Zephyr, FreeRTOS Wireless: LoRaWAN (AWS, TTN, Senet), LTE-M (Quectel), WiFi, BLE Protocols: MQTT, Modbus, HTTP, mbedTLS, TCP/IP OTA & Bootloader: MCUboot, FOTA Power Profiling: Joulescope, nRF PPK-II Cloud: AWS IoT Core, The Things Network Debugging: Oscilloscope, Logic Analyzer (Saleae), Analog Discovery 3, Spectrum Analyzer Other: LVGL GUI, I2C, SPI, UART, DMA, I2S, ADC/DAC If you're building a device that needs to run reliably in the field for years — let's talk.