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Senior Software Engineer and Systems Architect with 15+ years of hands-on experience in commercial development. My core expertise spans native software, microcontroller firmware, and electronic hardware. For the past 10 years, I have been helping my Upwork clients create new products from scratch and implement new features in existing software and hardware products. ■ Embedded Systems and Firmware ▪ Core experience: - Complex business logic & advanced control algorithms - Distributed control systems, machine networking (M2M) - High-performance / low-latency control - Secure, reliable, real-time interprocess communication (IPC) • Typical stack: - C, C++ (C++11/17), STL (except that needs heap memory allocation) - IAR for ARM, Keil + ARM/Clang, GCC for ARM, STM32CubeIDE - ThreadX RTOS (preferred), FreeRTOS, mbed, mbedTLS - No HAL from STM32 in production firmware ■ Native Desktop Applications and C++ Backend Software • Specialization: - High-performance GUI applications based on the Qt Framework (QtWidgets) - Console applications (CLI - command-line interface) - Standalone applications (no GUI or command-line interface) - Windows services and system applications - Any of the above combined into a complex via interprocess communication (IPC) • Typical stack: - C++11/23, STL, Qt6, Boost, ICU, rich own codebase - Microsoft Visual Studio, Microsoft Visual Studio Code - SQL DBMS: Oracle, Postgres, SQLite, MySQL, MS-SQL ● Other - Strong focus on design quality, reliability, and maintainability - Recent domains: IoT, AgTech, Automotive, Manufacturing, Defense, Energy - Recent tech: LoRa, GSM, LTE, LTE-M, Ethernet, RS-485, Modbus, CAN, CAN FD - Recent STM32 MCUs: STM32H7 (single/dual-core), STM32F4, STM32L4, STM32G4 Keywords: C++ C Multithreading IPC Qt Framework Socket IP TCP UDP PPP SSL TLS PLC SCADA MCU Microcontroler STM32 RTOS FreeRTOS ThreadX AVR UART USART CAN LIN Modbus Ethernet SPI I2C DMA RS-232 RS-485 DMA Sensor 12V 24V 48V 5V 3V 3V3 Drone FPV UAV UGV ESC Ardupilot Betaflight Pixhawk PX4 LRS ELRS S.BUS SBUS CRSF Crossfire Radio GSM SMS LTE LTE-M GPS GNSS LoRa Serial Port FTDI FT232 OGG OPUS Vorbis Speex WAV WinAPI WinSock mbed mbedtls

My name is Mieszko Mieruński, I have 12+ years of experience with Embedded Systems Ex-Nordic Semiconductor Employee Full Lab for building your device. IoT Expert 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 & 𝗣𝗿𝗼𝘁𝗼𝗰𝗼𝗹𝘀 • Connectivity: LTE-M, NB-IoT, LoRaWAN, Bluetooth / BLE, Wi-Fi (including HaLow), Thread • Application Protocols: Matter, MQTT, LwM2M, CoAP • Integrated Systems: GPS/GNSS, Asset Tracking, Sensor Fusion 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀 & 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 • Zephyr RTOS (Official Ecosystem Vendor & Technical Contributor) • FreeRTOS • Embedded C/C++ • Rust (for memory-safe, mission-critical systems) 𝗠𝗖𝗨 𝗙𝗮𝗺𝗶𝗹𝗶𝗲𝘀 • Nordic Semiconductor (nRF52, nRF54, nRF91 series) • Espressif (ESP32, ESP32-S3, ESP32-P4) • STMicroelectronics (STM32H7 and others) 𝗩𝗲𝗿𝘁𝗶𝗰𝗮𝗹 𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻𝘀 • Industrial IoT (IIoT) & Factory Automation • Smart Agriculture • Connected Healthcare & MedTech • Smart Home & Building Automation • Emergency & Safety Devices • Asset Tracking & Logistics Expert in rapid prototyping - from idea, through device design, firmware development to working prototype including PCB design/assembly. Recent projects include low power IoT solutions using nRF91 running Zephyr RTOS and AWS IoT services. In my career I've been working as firmware engineer as well as embedded product owner - giving me perspective of both worlds on how to build efficient devices and how to focus on business aspects of the device. For bigger projects I have my carefully picked team of engineers ready to take on hardest challenges. I'm also happy to provide consulting, to steer your product development in right direction as well as providing trainings on cutting-edge IoT technologies and methodologies. Let me know how can I assist your idea

I help businesses, startups and founders design and build complete software systems, from embedded devices and IoT solutions to backend services, web platforms, desktop applications and mobile apps. Every project starts with understanding your business goals. Based on your requirements, I help select the right architecture and technology stack to build solutions that are reliable, maintainable and ready to grow. I can help with: Software architecture and technical consulting Embedded firmware and IoT systems Backend, web, desktop and mobile applications Hardware and software integration Legacy system modernization and technology migration Monitoring, diagnostics and long-term technical support Documentation and knowledge transfer for your team If you're looking for a software engineer who can take ownership of a project from architecture and implementation to deployment and ongoing support. I'd be happy to discuss your ideas.

I am firmware developer with over 8 years experience. I was working for one the biggest provider of BLE chips - Nordic Semiconductor - creating SDK, writing drivers, examples, tests and documentation. I was also part of team creating BLE MESH stack for nrf platform. I specialize in creating embedded systems (eg asset tracking) as well as standalone device (toys, gadgets) including embedded device firmware and mobile app software connected over BLE. Working experience: - worked for 2 years for Nordic Semiconductor (famous nrf51 and nrf52 series) creating BLE based firmware - worked for Silvair - company which created first certified BLE MESH stack I completed many projects: - child toy with ble, mic, speaker, i2c touch sensor, led - e-ciggarette with ble, led, complex algorithms, unit tests, system tests - line-follower with ble, motor control, PID algorithm - indoor tracking system including beacons, scanners and relays - nrf52 based device with accelerometer, getting data from it and sending it to mobile over BLE with mobile app plotting data in real time - nrf52 based device to commmunicate with external device getting data over i2c and sending it to mobile over BLE / working on mobile app - nrf52 based home automotion device with bulbs connected, controlled over BLE by mobile app written by me #ARM Cortex-M #AVR #BLE #C #C++ #Android #python

🚀 𝗩𝗶𝗱𝗲𝗼 𝗦𝘁𝗿𝗲𝗮𝗺𝗶𝗻𝗴 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 | 𝗪𝗲𝗯𝗥𝗧𝗖, 𝗟𝗶𝘃𝗲𝗞𝗶𝘁, 𝗙𝗙𝗺𝗽𝗲𝗴, 𝗛𝗟𝗦, 𝗥𝗧𝗦𝗣, 𝗔𝗜 𝗩𝗶𝗱𝗲𝗼 🚀 I am a Video Streaming Engineer with 7 years of experience, specializing in real-time video communication, live streaming, media processing, RTSP camera systems, AI video workflows, and scalable backend infrastructure. I help clients build production-ready video systems using WebRTC, LiveKit, FFmpeg, GStreamer, HLS, RTMP, RTSP, SRT, Node.js, NestJS, Go, Python, C++, Docker, and cloud infrastructure. 𝐌𝐲 𝐜𝐨𝐫𝐞 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧𝐜𝐥𝐮𝐝𝐞𝐬: ✓ 𝑾𝒆𝒃𝑹𝑻𝑪 & 𝑹𝒆𝒂𝒍-𝑻𝒊𝒎𝒆 𝑽𝒊𝒅𝒆𝒐 WebRTC video calls, LiveKit integration, group video calls, video conferencing, screen sharing, WebSocket signaling, real-time audio/video communication, low-latency streaming, and scalable video call backends. ✓ 𝑳𝒊𝒗𝒆 𝑺𝒕𝒓𝒆𝒂𝒎𝒊𝒏𝒈 & 𝑷𝒍𝒂𝒚𝒃𝒂𝒄𝒌 HLS playback, RTMP ingest, RTSP-to-web playback, SRT streaming, adaptive bitrate streaming, live event streaming, stream recording, video caching, offline playback, and playback optimization. ✓ 𝑭𝑭𝒎𝒑𝒆𝒈, 𝑮𝑺𝒕𝒓𝒆𝒂𝒎𝒆𝒓 & 𝑴𝒆𝒅𝒊𝒂 𝑷𝒓𝒐𝒄𝒆𝒔𝒔𝒊𝒏𝒈 Custom FFmpeg pipelines, GStreamer workflows, video encoding, transcoding, compression, HLS generation, stream conversion, audio/video processing, cloud video editing, and automated media workflows. ✓ 𝑹𝑻𝑺𝑷, 𝑪𝑪𝑻𝑽 & 𝑵𝑽𝑹 𝑺𝒚𝒔𝒕𝒆𝒎𝒔 RTSP camera streaming, CCTV/NVR platforms, IP camera integrations, browser-based camera playback, video recording systems, surveillance dashboards, real-time monitoring, and AI-powered video analysis. ✓ 𝑨𝑰 𝑽𝒊𝒅𝒆𝒐 & 𝑩𝒂𝒄𝒌𝒆𝒏𝒅 𝑬𝒏𝒈𝒊𝒏𝒆𝒆𝒓𝒊𝒏𝒈 AI video generation backends, AI video analysis, computer vision workflows, real-time video processing, cloud-based video generation, and backend systems for AI-powered media applications. ✓ 𝑩𝒂𝒄𝒌𝒆𝒏𝒅 & 𝑪𝒍𝒐𝒖𝒅 𝑰𝒏𝒇𝒓𝒂𝒔𝒕𝒓𝒖𝒄𝒕𝒖𝒓𝒆 Node.js, NestJS, Go, Python, C++, REST APIs, WebSockets, Docker, cloud deployment, load balancing, scalable backend architecture, and performance optimization for high-volume video platforms. ❖ 𝑰 𝒄𝒂𝒏 𝒉𝒆𝒍𝒑 𝒚𝒐𝒖 𝒘𝒊𝒕𝒉: - Building WebRTC video call platforms - Integrating LiveKit for real-time audio/video apps - Creating live streaming and HLS playback systems - Developing RTSP-to-browser video solutions - Building CCTV/NVR and IP camera platforms - Implementing FFmpeg and GStreamer media pipelines - Creating scalable encoding and transcoding workflows - Building AI video generation or AI video analysis backends - Developing video cache players with offline playback - Optimizing latency, buffering, playback quality, and stream reliability - Designing backend APIs for video platforms - Fixing broken streaming, playback, recording, or camera pipeline issues My goal is simple: build video systems that work reliably in production, smooth playback, stable calls, clean media pipelines, scalable backend architecture, and a strong user experience. If you need a developer who understands video streaming engineering, WebRTC, LiveKit, FFmpeg, GStreamer, HLS, RTSP, CCTV/NVR, AI video workflows, and scalable backend systems, I can help you build, fix, optimize, or scale your platform. ❖ 𝑩𝒆𝒔𝒕 𝑺𝒌𝒊𝒍𝒍 𝑻𝒂𝒈𝒔 C++, C, Video Streaming, Live Streaming, WebRTC, HLS, MPEG-DASH, RTSP, RTMP, SRT, OTT, IPTV, VOD, SSAI, VoIP, SIP, FFmpeg, GStreamer, YOLO, Real-Time Stream Processing, Video Encoding, Video Transcoding, H.264, H.265, HEVC, VP9, AV1, x264, x265, CUDA, Intel QuickSync, SIMD, AVX, AWS Elemental, AWS MediaConvert, Amazon Kinesis Video Streams, AWS CloudFront, Akamai, AWS, GCP, Azure, Wowza, Nginx RTMP, Janus, Red5, Asterisk, FreeSWITCH, Twilio, Jitsi, CCTV, MQTT, Socket Programming, Linux, Windows, Performance Optimization

Business software solution architect and developer specialising in Microsoft Power Platform (Power Automate, Power Apps, Dataverse) and Microsoft 365 Suite (SharePoint, Microsoft Lists, Outlook, Teams, Excel). I help companies build Microsoft 365 solutions to automate manual tasks, drive efficiency, and improve customer experience. ⚙️ What can I help you with Workflow Automation ↳ Automate repetitive tasks across MS365, Outlook, and other tools Business Apps ↳ Build custom applications that integrate seamlessly with MS365 Business Intelligence ↳ Visualise business data and track KPIs with dashboards and reports System Integrations ↳ Connect MS365 with external systems and third-party services Data Pipelines ↳ Extract data from multiple sources, unify and synchronise across systems ⸻ 🧰 My technology stack and tools ↳ Microsoft 365: SharePoint, Microsoft Lists, Excel, Outlook, OneDrive ↳ Microsoft Power Platform: Power Automate, Power Apps, Power BI, Dataverse, AI Builder ↳ Azure Cloud Platform: Azure Functions, MS SQL Server, Azure Data Factory ↳ Custom Code: TypeScript, JavaScript, .NET, Node.js, React While I value proficiency with specific tools, I strongly believe that the ability to deliver software solutions is largely technology-agnostic. I'm a proponent of choosing the best tool for each job and adapting quickly to new technologies when your project requires it. ⸻ ⏰ Project management Technical skills matter, but from my experience, I learned that successful software delivery depends equally on project management. So here are the steps I take to ensure your project is delivered on time, on budget, and in line with your expectations: ↳ Define a clear problem statement and scope ↳ Establish realistic timelines and budgets ↳ Design a solution that fits the budget ↳ Identify risks and dependencies upfront ↳ Provide regular progress updates throughout ⸻ ⚖️ Why work with me Here are a few things I think you'll find valuable from my diverse experience and the way I work: ↳ Business analysis skills. You don't need polished specs to get started. ↳ Technical proficiency. No problem is too technical for me to solve. ↳ Maintainable solutions. You get solutions that are cost-effective and fast to evolve. ↳ Pragmatic engineering. Custom code as a strategic solution, not the first option. ↳ Reliable delivery. Delivering your project is my job, not a side gig. ⸻ 📩 Get Started Looking for help with business software? Send me a message sharing what you're looking to achieve, and I'll get back to you within 24 hours with my thoughts on the best approach. Looking forward to helping you achieve your goals.