Expert IoT Firmware and Embedded Engineer

@amelectronics

I am a skilled and reliable Embedded Systems Engineer with over 6 years of hands-on experience in Arduino, ESP32/ESP8266, and microcontroller-based development. I specialize in designing efficient, stable, and scalable embedded solutions, turning ideas into fully functional hardware-software systems. I have a strong background in electronics, sensors, communication protocols (UART, I2C, SPI, MQTT, WiFi, BLE), and real-time embedded systems. My development approach focuses on clean, well-structured, and well-documented firmware, ensuring long-term reliability and easy maintenance. I also provide thorough testing, debugging, and performance optimization, including power efficiency improvements where required. I am a detail-oriented engineer with strong problem-solving skills and extensive experience in hardware debugging and firmware optimization. Beyond technical expertise, I value clear communication, meeting deadlines, and maintaining high client satisfaction. I work closely with clients to fully understand project requirements and deliver high-quality results. Pricing is flexible and can be discussed based on project scope and complexity. I am open to both short-term and long-term projects. Let’s work together to build a professional, reliable, and efficient embedded system for your needs.

@shadabkhan92

Hi, Already worked on this, https://www.freelancer.com/projects/embedded-systems/Sierra-Handshake-Integration check lets discuss

@nehasingh17

We at HardFault have extensive experience delivering end-to-end embedded and IoT solutions, and your requirement aligns perfectly with how our expert team operates across both firmware and hardware domains. From ARM Cortex-M and ESP32 platforms to RTOS-based architectures like FreeRTOS, we regularly build scalable, production-grade systems that handle complex connectivity stacks including MQTT, HTTP, BLE, and LoRa. Our team is equally strong on the hardware side—PCB design, component selection, and real-world debugging—so we ensure the firmware is always tightly optimized with the underlying electronics for reliability and performance. What stands out in your requirement is the need for a clean integration of multi-platform firmware with robust IoT communication, and that’s exactly where we bring value—bridging hardware and software seamlessly while keeping power efficiency, latency, and long-term maintainability in focus. We don’t just write firmware, we design systems that work reliably in the field at scale. Could you share more about the target application or deployment environment so we can align the architecture and tech stack accordingly?

@nichitav7

Hello I will align your embedded/IoT requirements with a robust hardware–firmware architecture and deliver scalable, production-ready firmware that is optimized for reliability, power efficiency, and real-world deployment stability. ✔ Confirmations -Target MCU platform(s): ARM Cortex-M / ESP32 / mixed architecture? -Connectivity stack required: MQTT / BLE / Wi-Fi / LoRa specifics? -RTOS usage: FreeRTOS baseline or bare-metal hybrid acceptable? -Existing hardware/PCB status: finalized or still open for iteration? -Security requirements: encryption, secure boot, OTA updates needed? ✔ Delivery / Scope -RTOS-based firmware architecture design (task model, scheduling, ISR strategy) -Peripheral driver development (UART, SPI, I2C, ADC, PWM as required) -IoT communication layer (MQTT/HTTP/BLE integration with error recovery) -Power optimization strategy (sleep modes, duty cycling, wake logic) -Hardware bring-up support and debugging (JTAG/SWD, logic analysis, scope validation) -OTA update framework (if required) with rollback safety design -System stability testing plan (stress, memory leak, watchdog strategy) Let’s clarify the exact device target and connectivity requirements so the architecture can be optimized from the start rather than adjusted later. Regards, Nichita.

@jb095

Hi, I’m an embedded systems engineer with strong experience across both hardware and firmware. I can support your project end-to-end, from PCB design to firmware development, especially for ESP32 and ARM-based systems. I have hands-on experience with FreeRTOS, IoT communication (MQTT, HTTP, BLE), and building reliable, low-power embedded solutions. I focus on practical designs that work reliably in real conditions, not just in theory. Whether your project involves hardware design, firmware, or full system integration, I can help deliver a clean and production-ready solution. You can also review my profile to see relevant experience that matches your project requirements. Feel free to share your requirements, and I’d be glad to discuss the best approach. Thank you.

@alluankit01

Hi, I can help with embedded firmware, IoT connectivity, and hardware-level development across ESP32, ARM Cortex-M, PIC, AVR, and related platforms. I have hands-on experience with firmware architecture, FreeRTOS task design, MQTT/HTTP communication, Wi-Fi/BLE integration, sensor interfaces, low-level debugging, PCB review, and hardware-software bring-up. I can work from schematic review through firmware implementation, testing, and field-ready optimization. My focus is always on stable and maintainable embedded systems: clean C/C++ code, reliable communication, efficient power usage, proper error handling, and clear documentation so the product can be maintained long term. I’m comfortable working with ESP-IDF, PlatformIO, Keil, IAR, VS Code, and hardware debugging tools, and I can quickly step into an existing prototype or help build a new IoT system from the ground up. Best regards Ankit

@ThynkLoop

Hi, I am an embedded systems and IoT engineer with hands-on experience across ESP32, ARM Cortex-M platforms, and full product development—from PCB design to RTOS-based firmware. I can support your project with robust firmware development, efficient system architecture, and reliable IoT integration using protocols like MQTT, HTTP, and BLE. Expertise: *Microcontrollers: ESP32, STM32, AVR, PIC *RTOS: FreeRTOS *IoT Protocols: MQTT, HTTP, CoAP *Connectivity: WiFi, BLE, LoRa *Hardware: Schematic design, PCB layout, debugging Scope: *Embedded firmware development *RTOS-based system design *IoT communication and cloud integration *Hardware-software debugging *System optimization for performance and reliability Deliverables: *Clean and well-structured firmware *IoT communication implementation *Documentation and support *Debugged and tested system Approach: *Understand your specific use case *Design modular firmware architecture *Implement efficient multitasking system *Integrate IoT communication *Optimize for performance and stability I am available for immediate start and can adapt based on project requirements.

@suttonp

Hi, I bring strong experience across ESP32, ARM Cortex-M, and RTOS-based firmware, and can deliver robust, production-ready embedded and IoT solutions from hardware through to firmware.

@guillermom14

Hi, I specialize in embedded systems that bridge hardware and firmware seamlessly. I’ve worked extensively with ESP32, ARM Cortex-M, and RTOS environments to build reliable IoT products. What I offer: • Firmware development using FreeRTOS (ESP-IDF / Cortex platforms) • IoT connectivity (MQTT, HTTP, BLE, Wi-Fi) • PCB design and hardware debugging • Clean, scalable system architecture I focus on stability, performance, and long-term reliability.

@milanh54

Hi, I’m an embedded systems engineer with extensive experience delivering complete IoT products—from PCB design to RTOS-based firmware. Relevant Expertise • Microcontrollers: ARM Cortex-M (M0/M4/M7), ESP32, AVR, PIC • RTOS: FreeRTOS (ESP-IDF and Cortex environments) • Connectivity: Wi-Fi, BLE, LoRa with MQTT/HTTP/CoAP • Hardware: Schematic design, PCB layout, and debugging How I Work • Design scalable firmware architectures with clean task separation • Optimize for power efficiency, stability, and low latency • Ensure tight integration between hardware and firmware • Deliver well-documented, maintainable code

@sdowrick

Hi, I’m an electronics and embedded systems engineer with experience across the areas you have listed, including PCB design, RTOS-based firmware, IoT communication, microcontrollers, hardware/software integration and debugging. I have experience with the processor families mentioned, including ARM Cortex-M devices such as the STM32H747 dual-core Cortex-M7/M4, ESP32, PIC, Atmel/AVR/SAM and other embedded platforms. My firmware experience includes FreeRTOS, embedded C, MQTT, HTTP, Ethernet/LWIP, UDP communication, serial interfaces, GPIO control, sensor/peripheral integration, device status reporting and low-level hardware bring-up. I can also support the hardware side, including schematic review, PCB layout review, component selection, power management considerations and hardware-in-the-loop debugging. This means I can work across both the firmware and electronics side rather than treating them separately. My approach would be to first review the product goals, existing hardware or firmware, target processor, communication requirements and any current issues. From there I can help with firmware architecture, RTOS task structure, peripheral integration, IoT/MQTT communication, debugging, testing and handover. My bid would cover an initial review and development phase. Once the exact product scope is clear, further milestones can be agreed if needed. Kind regards, Samuel

@abbaauwalharuna

Thank you for this opportunity. As an Embedded Systems Engineer with extensive experience across the full product development lifecycle—from PCB design to RTOS-based firmware—I am perfectly positioned to convert your circuit diagram into a production-ready Altium PCB package. My approach to your project: I will first recreate your provided circuit diagram as a clean, well-annotated schematic in Altium Designer (.SchDoc) with proper net labeling and hierarchical organization. Given my deep familiarity with the ESP32-WROOM-32E (ESP-IDF, power sequencing, antenna clearance, decoupling requirements), I will ensure the schematic reflects best practices for this module.

@smaskengr

Hi, I hope you are doing wonderful. This project aligns perfectly with my expertise. I’m Hassan, an IoT, Embedded Firmware & Energy Systems Engineer with 7+ years of experience, specializing in end-to-end embedded and IoT solutions—from hardware to firmware and cloud integration. I can design and develop a reliable, production-ready system tailored to your needs. I have strong experience with ARM Cortex-M, ESP32, and RTOS-based firmware (FreeRTOS), building efficient and low-latency systems. I’ve also worked with IoT protocols like MQTT and integrations using Wi-Fi, BLE, and LoRa on platforms such as Tuya and ThingsBoard. On the hardware side, I handle PCB design, schematics, and debugging, ensuring smooth hardware-software integration. My background in energy systems (solar, EMS, genset sync) helps me build scalable and field-reliable solutions. I will deliver optimized firmware, stable connectivity, and a scalable solution. After a quick chat, I can share relevant experience and past projects. I look forward to working with you. Hasan A

@Srashtasoft

Hi there, I have read your project requirement and you need an experienced Embedded Systems & IoT Firmware Engineer who can handle complete product development—from hardware design (PCB) to RTOS-based firmware, along with reliable IoT connectivity and scalable system architecture. We have strong experience in embedded development across ARM Cortex-M, ESP32, and other microcontrollers, including FreeRTOS-based firmware, MQTT/HTTP communication, and hardware-level debugging. Our approach focuses on building stable, low-power, and production-ready systems with long-term reliability. Before proceeding, we have a few quick questions: ======================================== What is the primary application/use-case of the IoT device (industrial, consumer, smart home, etc.)? Do you already have hardware/PCB ready, or do you need full design from scratch? Which connectivity protocols are mandatory (MQTT, BLE, Wi-Fi, LoRa, etc.)? Are there any specific performance, power consumption, or security requirements? Best Regards, Srashtasoft Team

@MehdiSehati44

Hi , I'm expert in hardware design, firmware for microcontroller and software for android and IOS and windows applications, I can comfortably fill the gap between hardware and software for you. Reply me and I will send you my portfolio. Best Regards, Mehdi

@Bhargav99786

As a full-stack embedded development team, we possess the exact combination of skills that your project requires. We pride ourselves on delivering exceptional IoT and firmware solutions across various platforms, and our extensive experience with ARM Cortex-M, ESP32, and other microcontrollers is highly relevant to this project. Additionally, our expertise in implementing FreeRTOS for the ESP32/ESP-IDF platform ensures a high level of multitasking and low-latency system architecture in demanding IoT environments. Beyond firmware, our hardware engineering prowess and PCB design proficiencies are strong assets. I am excited about the prospect of creating an efficient, reliable system from the initial schematic layout to prototyping, testing, and debugging. This holistic approach allows us to identify potential bottlenecks, optimize performance and prioritize power management. Drawing upon a vast inventory for rapid prototyping and testing, we can ensure accelerated turnaround times without compromising quality. Finally, communication is essential to me; it is how we've maintained not just satisfied but delighted clients across 15+ successful projects globally. We pay great attention to your inputs, contributing where necessary while keeping you involved at every stage. Choose our team of seasoned engineers for your project; let our solution-oriented attitude help transform your idea into a robust electronic product.

@nikki2201

Embedded engineer with experience in Linux-based systems and RTOS environments, including Buildroot bring-up, kernel configuration, and embedded C/C++ development. I’ve contributed to industrial and space-related projects, focusing on debugging, system integration, and automated testing. I can quickly understand existing codebases and deliver reliable firmware solutions for your project.

@theaizaz

I've read your brief carefully, you need someone who owns the full embedded stack, from PCB to RTOS firmware with IoT connectivity. That's exactly what I deliver. I'm Aizaz, embedded systems engineer with 4+ years of product development experience and founder of KernelCrew, an IoT hardware/software engineering firm. Direct match to your requirements: ✅ ARM Cortex-M & ESP32 — STM32 full-series (bare metal, HAL, bootloaders) + ESP32 ESP-IDF daily ✅ FreeRTOS — multitasking, queues, semaphores, real-time control loops in production ✅ IoT Protocols — MQTT, HTTP, CoAP with AWS IoT Core & Azure IoT Hub ✅ Wireless — BLE/BLE Mesh (nRF52840), Wi-Fi (ESP32), LoRa sensor networks ✅ PCB Design — 2–8 layer layouts in Altium & KiCad, DFM-ready Gerbers/BOM/CPL ✅ IDEs — Keil MDK, IAR, VS Code/PlatformIO/ESP-IDF A couple of quick questions: - Which MCU platform is this targeting? - Greenfield firmware or existing codebase? - PCB from scratch or existing hardware? I deliver fully tested, documented, production-ready solutions. Let's talk. Aizaz