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Hi, my name is Arsen. I’m a Senior C++ and Python developer with 5+ years of experience building software for Linux, Windows, and embedded systems. I focus on clean, efficient, and reliable solutions for low level, backend, and performance critical tasks. What I bring to projects: • C/C++ development: STL, Boost, Boost ASIO, Qt, WinAPI, OCCI, V8, POSIX, multithreading • Python development: automation tools, data pipelines, backend logic, Django • Database engineering: Oracle, SQLite, MongoDB, data export tools, batch processing, custom type conversion • Linux systems programming: networking utilities, driver level interaction, Linux kernel headers, OpenWRT, desktop and CLI tools • Wireless and low level networking: Generic Netlink, nl80211, libnl/libmnl, Wi Fi scanning tools, protocol and frame parsing • Reliability and performance: profiling, transactional workflows, data integrity focused design, Dockerized builds, CI/CD with TeamCity • Cross platform delivery: Linux and Windows applications, Make, CMake, Conan, Git/SVN, GDB, Valgrind, Doxygen, Bash I have built tools ranging from high performance Wi Fi scanners in C that interact directly with the Linux wireless stack, to cross platform C++ command line utilities that export Oracle data into SQLite with transactional safety and performance profiling. I am comfortable working close to the system, optimizing throughput, handling large datasets, and designing software that is maintainable and stable in production. Clients usually trust me with complex backend, systems, and infrastructure related tasks where performance, correctness, and long term reliability matter. If you are looking for a developer who can work on C++, Python, Linux internals, networking, or data heavy applications, let’s talk. 🙂

✔ IoT Solution Leader | Leading a team of 220+ engineers ✔ 11+ Years in connected products | End-to-end IoT development ✔ Hardware + Firmware + Cloud Expertise Drop me a message with “DISCOVERY” - we’ll run a free discovery session and turn your idea into a clear architecture, timeline, and execution roadmap while avoiding costly mistakes early on. I lead a 220+ engineer team specializing in end-to-end IoT development – from early discovery and architecture to prototyping, production preparation, and long-term product evolution. Over the last 11+ years, I’ve been involved in building connected solutions that combine embedded systems, electronics, firmware, cloud platforms, and user apps (web, mobile, desktop). My role is focused on bridging business goals with engineering reality: helping teams validate ideas, select the right architecture, reduce technical risks, and build products that can successfully move from prototype to production. Core expertise: • IoT system architecture Designing complete connected ecosystems: devices, communication layers, cloud infrastructure, data flows, APIs, and user applications. • Embedded systems & firmware MCU/MPU-based development, RTOS, embedded Linux, device drivers, hardware communication protocols, low-power optimization, OTA updates. • Hardware development & prototyping Electronics design, schematics, PCB development, hardware bring-up, testing, validation, and preparation for mass production. • Connectivity & communication BLE, Wi-Fi, LoRaWAN, LTE/cellular, MQTT, sensor integration, and reliable device-to-cloud communication. • IoT cloud platforms AWS IoT, device management, telemetry pipelines, real-time monitoring, analytics, and scalable backend architectures. • Connected applications Web dashboards, mobile apps, desktop applications, admin portals, device management platforms, and third-party integrations. Typical IoT products I work with: • Industrial IoT & Industry 4.0 Connected machinery, predictive maintenance, industrial automation, sensor networks, and remote monitoring. • Smart Home & Building Automation Connected devices, automation platforms, energy management, and intelligent control systems. • Healthcare & Wearables Connected medical devices, monitoring solutions, wearable ecosystems, and compliance-focused development. • Energy & Infrastructure Smart metering, energy monitoring, telemetry systems, and remote control solutions. • Location-based products GPS tracking, asset tracking, fleet monitoring, and safety-focused connected devices. • Robotics & Drones UAV/UGV/UAS platforms, telemetry, control systems, and autonomous solutions. Selected project experience: • GPS tracking ecosystem Built a connected solution combining hardware devices, firmware, cloud infrastructure, mobile applications, and management dashboards for real-time tracking and alerts. • Wearable safety platform Developed an IoT wearable ecosystem with embedded software, wireless connectivity, cloud services, and user-facing applications. • Industrial monitoring solution Created a sensor-based platform for collecting operational data, processing telemetry, and providing actionable insights through dashboards. Why clients work with me: • Strong industrial and commercial product development experience I work with complex products where reliability, scalability, security, and real-world constraints matter. • Ability to handle both hardware and software challenges IoT success depends on how all system components work together - not isolated development tasks. • Clear communication and structured development process Transparent milestones, technical documentation, predictable execution, and clear ownership at every stage. • Focus on practical solutions I help teams avoid unnecessary complexity and choose architectures that fit actual product goals. • Long-term support mindset Project scope for reference: Phase 01 – Definition & Architecture: $15k–$25k Discovery, requirements analysis, system architecture, technology selection, and roadmap creation. Phase 02 – Prototype & Validation: $35k–$120k Hardware prototypes, firmware, cloud infrastructure, applications, testing, and product validation. Phase 03 – Production Readiness: $60k–$250k+ Production optimization, manufacturing support, certification preparation, scalability improvements, and deployment. My approach: I don’t start with coding. I start by understanding the product vision, business goals, technical constraints, and future scaling requirements. The goal is to create IoT systems that work reliably in real-world conditions, avoid expensive redesigns, and provide a strong foundation for future growth. If you’re building a connected product involving hardware, firmware, cloud, or device management - feel free to share your idea. I'm ready to help evaluate the technical approach and identify the most practical path forward. Worth a chat?

✅ 100% Client Recommendation ✅ Top Embedded and Firmware developer ✅ Top Hardware designer ✅ Top Software design ✅ Top Mechanical design and industrial design ✅ Top Enclosure design Services: 1) Hardware/Electronics design (Power, Analog, Digital/High-speed and RF electronics design) 2) Precertification testing (EMI, ESD, EMC, FCC, CE, UL) 3) Firmware design С/C++ (Bare metal MCU/MPU, FreeRTOS, Zephyr RTOS, Embedded Linux, Wireless protocols, Security, Interfaces, etc) 4) Industrial and Mechanical design (Enclosure design, 3D printing, IP standards, Prepare all for injection molding, etc) 5) UX/UI design (Embedded devices with displays, Mobile and Desktop applications) 6) Software design (Android, IOS, Linux kernel and user space development) 7) Embedded Quality Assurance(QA) and testing 8) Manual verification/testing PCB/FPC, functional and unit testing of the Firmware/Software, stress testing, temperature range testing Service->Hardware design service: - Power electronics design: (PFC, Solar charging controller, chargers, high voltage control, Motor controllers DC/AC/BLDC ) - Analog electronics design: High-accuracy analog measurements, Noise filtration, Digital to analog conversion, Amplifying signal - Digital and high-speed electronics design: - Memories DDRx/LPDDRx, SDRAM, Camera and display interfaces (MIPI-DSI, MIPI-CSI, DisplayPort, etc), Data communication interfaces (QSpi, SPI, UART, I2C, FMC, I2S, USB 2/3.x, etc), ( - RF Designs: ( 50-60 GHz (Radars), 1-6 GHz (UWB, Wifi, BLE, ZigBee, GPS, NB-IoT, LTE-M/LTE, Z-Wave, etc), 13,6 MHz, 128 kHz (NFC, RFID, etc), 433 MHz (Custom protocols) Service->Industrial and Mechanical design - Industrial design of the sketch - it includes a few sketch designs, depending on the physical sizes of the device, specific of industry and user experience - Mechnical CAD design with deep PCB integration - it includes full mechanical draw based on the industrial design with detailed sizes, materials and manufacturing specific. - Thermal calculation and simulation - it includes simulation of the heating device inside enclosure, with theoretical cooling calculation - 3D printing and verification - we use 3D printer hp jet fusion 5210, with a very nice quality of printing, that helps us to make a good verification of parts with PCBs - Injection molding - the last step, which includes manufacturing optimization and making pres forms, preparing documentation for the manufacturing Service->Firmware design С/C++: - Languages: C/C++, Assembler - Diagrams: Block, UML, Workflow, APIs - Interfaces: I2S, SAI, MIPI-DSI, MIPI-CSI, USB 2/3.x, LTDC, DDR3/DDR4/LPDDR4, I2C, SPI/QSPI, UART, CAN, Ethernet - Wireless: NB-IoT, LTE M, GPRS, GPS, LTE, UWB, WiFi, BLE, ZigBee, Z-Wave, LoRa, Thread, 6LoWPAN, Sub 1GHz, NFC (13,6 MHz), RFID 433 MHZ and 128 kHz - Protocols : MQTT, HTTP, FTP, Modbus TCP/RTU, SNMP, TCP/IP, UDP/IP, DLMS, custom protocols - Security: AES, SSL/TLS, custom algorithms - Libs and frameworks: TouchGFX (GUI lib for MCU), emWin (GUI lib for MCU), LVGL (GUI lib for MCU), WolfSSL (SSL/TLS), Mbed TLS(SSL/TLS), osxMotionFX (Sensors fusion algorithm based on the Kalman theory), FatFS, lwIP (TCP/IP stack), WICED (Wifi stack), aws/amazon-freertos, Paho MQTT, TensorFlow - Embedded OS: FreeRTOS, TI-RTOS, ZephyrOs, Embedded Linux, Yocto, ROS - MCUs: NXP (i.MX RT1064, LPC1100, LPC4000), Nordic (NRF52xx/NRF53xx/NRF91xx), TI (CC3220/CC26xx/CC1100/CC3200, MSP430), Espressif (esp32, esp8266), ST(STM32H7/F7/F4/L4/F0/L0/WB/WL/G0 and STM8), Atmel/Microchip(SAM D20/D21/L21/R21/V70/V71, SAMA5/SAM4/SAMD4), Silicon Labs(EFR32, ZGM130S), Cypress (PSoC 3/PSoC 4), Kinetis (Family MK81FN256VDC15), Holtek (HT68xx) - MPUs: Analog Devices (ADSP-2156x SHARC), Qualcomm (Snapdragon 625/425/610/845), Allwinner (A64, A33, H3, H6 series), NXP (I.MX6/I.MX7/I.M8) , ST(STM32MP1) - SOMs: NVIDIA Jetson nano, NVIDIA Jetson Orin Nano, NVIDIA Jetson AGX Orin, Toradex (Colibri iMX6, IMX7, IMX8), Raspberry pi (CM3, CM4 modules), Inforce (Qualcomm Snapdragon 410, 820, 845 SOM), 8devices (Mango on Qualcomm IPQ6000/IPQ6010 Soc), Sensiedge(SensiBle 1 and 2, SensiLora) Service->Software: - Languages: Java, Kotlin, C#, C/C++, Python, Java Script - Diagrams: Block, UML, Workflow, APIs - Interfaces: USB, Ethernet - Protocols : MQTT, HTTP, FTP, Modbus TCP/RTU, SNMP, TCP/IP, UDP/IP, DLMS, custom protocols - Wireless: BLE, WiFi, UWB - Security: AES, SSL/TLS - Libs and frameworks: GStreamer, Paho MQTT, WolfSSL (SSL/TLS), Mbed TLS(SSL/TLS), QT framework, Xamarin Forms and Maui, ASP .NET Core and web development, React (web UI development), SQLite DB, FireBase DB, Mong DB, InfuxDB DB, Room, TensorFlow, Node.js - OS: Android, IOS, Linux, Windows

Expert Network & Systems Engineering: VPN solutions, OpenWRT firmware customization, containerization with Docker/Kubernetes, thorough network monitoring, and resilience. Experience: Specialized in elevating server and network infrastructures, my VPN works encompass versatile use cases such as remote access, inter-office connectivity, secure client/end-point communication, and Internet access. Core Skills: - Expert in VPN Configuration and Management of various protocols - OpenWRT Firmware Customization - Cultivated expertise in a variety of networking platforms, such as MikroTik, OpenWrt, UniFi, and more - Proficient with Docker Containers and Orchestration, CI/CD pipelines Professional Philosophy: Commitment to delivering user-friendly, reliable, and easy-to-maintain solutions. Striving to demystify network challenges for clients and enable them to concentrate on their core business activities. My vision as a Network and Systems Engineer is to deliver solutions that provide seamless, efficient communication and operations for end-users. Contact me for network engineering expertise that advances your infrastructure in line with contemporary practices and business objectives.

👋 I am a Certified Multicloud DevOps Engineer, Cloud Engineer, SRE, and Platform Engineer with 15+ years of experience designing, deploying, and managing secure, scalable infrastructure for enterprises, startups, and regulated industries like finance, healthcare, and e-commerce 🔥 WHY HIRE ME AS A DEVOPS ENGINEER? - 15+ years of hands-on experience as a Multicloud DevOps Engineer, Cloud Engineer, SRE and Platform Engineer - 300+ projects delivered for 200+ clients across finance, healthcare, e-commerce and startups - 17 completed Upwork contracts, 90% Job Success, 753+ hours, $30K+ earned on this platform alone - Cut deployment times by 82% through custom CI/CD automation across hybrid-cloud environments - 99.99% uptime achieved, cloud spend cut by 37% via optimized Kubernetes autoscaling (EKS/AKS/GKE) - Led a cloud transformation saving $2M+ annually, accelerating delivery 5x - Zero-downtime releases with 10x faster rollouts (Jenkins, GitLab CI, GitHub Actions, Argo CD) - MTTR improved by 42% via centralized observability (Grafana, Prometheus, ELK, Datadog) - 200+ sites migrated with zero downtime, 500+ nodes patched and hardened - Latency reduced by 52% via reverse proxy caching and CDN integration - 10+ professional certifications: AWS DevOps Engineer Professional, GCP Cloud Architect, Azure Solutions Architect Expert, and more 💪💪 SKILLS & ACHIEVEMENTS 👉 Programming Languages Applied across automation, infrastructure workflows, and backend integrations in enterprise CI/CD pipelines: Bash, Python, YAML, PowerShell – scripting and orchestration of distributed systems. Golang, TypeScript, JavaScript – building CLI utilities, microservices, and dashboards. SQL – database scripting and performance optimization for PostgreSQL, MySQL. Key Result: Cut deployment times by 82% through custom automation scripts across hybrid-cloud environments. 👉 Infrastructure as Code (IaC) Delivered multi-cloud infrastructure for Fortune 500 organizations: Terraform, Ansible, Puppet, AWS CloudFormation, AWS SAM, ARM Templates. Key Result: Achieved full disaster recovery readiness and cross-region scalability with Terraform and Ansible. 👉 Containerization and Orchestration Implemented microservices at scale via Kubernetes (EKS, AKS, GKE): Docker, Kubernetes (all providers), OpenShift, Azure Service Fabric. Key Result: Reached 99.99% uptime and reduced cloud spend by 37% through optimized autoscaling strategies. 👉 Cloud Platforms and Services Architected and secured global hybrid-cloud infrastructures: AWS (core focus): enterprise-grade deployments for healthcare, finance, retail. Azure: DevOps pipeline integrations with AD. GCP: Implemented GKE and BigQuery for large-scale data solutions. Key Result: Led a cloud transformation cutting costs by $2M+ annually and accelerating delivery 5x. 👉 DevOps Tools and Practices Engineered CI/CD pipelines, GitOps workflows, and release automation: Jenkins, GitLab CI, GitHub Actions, Bitbucket Pipelines, Argo CD, Octopus Deploy. Key Result: Delivered zero-downtime deployments and enabled 10x faster production rollouts. 👉 Monitoring and Observability Built end-to-end observability stacks: Grafana, Prometheus, ELK, Datadog, Zabbix, CloudWatch. Key Result: Improved MTTR by 42% through central log management, alerting, and tracing. 👉 Databases and Storage Engineered high-availability and cloud-native database solutions: MySQL, PostgreSQL, MongoDB, DynamoDB, Redis, Cassandra. Key Result: Migrated legacy DBs with zero data loss and achieved 62% performance uplift. 👉 Operating Systems & SysAdmin Large-scale administration of Unix/Linux systems: Ubuntu, CentOS, Debian, Cloud Linux, Windows Server. Key Result: Automated patching across 500+ nodes and hardened OS security to CIS standards. 👉 System Administration & Hosting Maintained enterprise-scale hosting platforms: cPanel, WHM, Cyberpanel, Plesk, HAProxy, Email Servers. Key Result: Migrated 200+ sites with no downtime, tripling load-balancer efficiency. 👉 Web Servers & Application Platforms Scaled and optimized business-critical applications: Apache, Nginx, Tomcat, WebSphere, JBoss. Key Result: Reduced latency by 52% via reverse proxy caching and CDN integration. 👉 Frameworks & Libraries Supported DevOps workflows as a Full Stack Developer: React, Angular, Next.js, Spring Boot, GraphQL. Key Result: Delivered CI pipelines for frontends and serverless backend deployments. 👉 DevOps Engineer - Security & Authentication Secured regulated infrastructures (PCI, HIPAA): Keycloak, Azure, Cognito, OKTA, Firewalls, Fail2ban. Key Result: Built centralized SSO and conducted security audits with advanced threat modeling. 📩 Ready to take your cloud infrastructure to the next level? Send me a message — let's turn your vision into reality together.

Linux developer: from kernel drivers till own browsers, firmwares and linux distros! Creating software for people. github: repu1sion