Hire the Best OpenWrt Specialists

I am a Embedded linux developer, Linux/ARM BSP/firmware engineer (6+ years). Experience and skills: ● 6 years of experience in Embedded systems and Home automation. ● Employed Full-time as Embedded linux Engineer ●Having experience with programming in C/C++, Java, and basic in Python, as well as many other languages. ● SVN, GIT, GIT Shell, Tortoise SVN, Tortoise GIT, Source Tree, Gerrit Code Revie, Jenkins... ● Working with various SoC's and microcontrollers : (TI: cc2530, cc2531, cc2538; Atmel: AtMega328p, AtMega8, ATtiny85; Arduino: Mini, Nano, Uno...; ESP8266, ESP32; Raspberry pi 2/3/4), Beaglebone, i.MX6 Sabre, Quectel AG35 EVB, NanoPi Air, OrangePi Win, STM32, Microchip SAM9X60-EK. ◉ Have solid knowledge of the standard interface such as I2C, SPI, UART, CAN, OCPP1.6 ,OCPP2.0,RS232, USB Host/Device, Ethernet, SDCard ◉ IoT devices with wireless connectivity such as LTE, BLE, WIFI, GPS. ◉ Solid experience with U-boot porting, BSP, Linux kernel, Device drivers development/optimization for the small Linux SoC boards. ◉ Yocto, OpenWRT, Buildroot ◉ OTA: swupdate, mender, rauc ◉ Chipset: Allwinner A64, Allwinner H3, NXP i.MX6, Quectel AG35, Qualcomm MDM9x07

I'm the founder of Sirin Software, a Florida-based R&D company with a development center in Kyiv, Ukraine. My team and I, comprising more than 40 software developers, work with embedded systems, IoT products, and Web3 applications. We have extensive experience in hardware design and software development. Core values: Solution-Centric Approach: We focus on solving problems and contributing to product concepts—we're more than just coders. Honesty: We never overpromise. Client Satisfaction: Delivering 5-star client experiences is our top priority, as reflected in real client reviews. Our main areas of expertise include: Embedded Linux: Device Drivers, BSPs, Yocto, Buildroot, OpenWRT Wired and Wireless Networking (WiFi, Bluetooth, ZigBee/Z-Wave, LoRaWAN, and more) Bare-metal and RTOS-based firmware for ARM and RISC-V (STM32, ESP32, nRF52, etc.) Cybersecurity: Network monitoring, intrusion detection Web3: Ethereum and Solana blockchain solutions Our hard skills (not limited to) include: C, C++, Python, Rust, Golang, JS/TS, Node.js, React.js, AWS, GCP, and MS Azure.

Senior embedded firmware engineer with 5+ years shipping production networking devices — 10+ product lines, 2000+ units in the field. I take routers, switches, and access points from prototype to production, and I'm now weaving edge AI into the firmware, mesh, and connectivity stacks I've built for years. What I do best: • OpenWRT firmware development (x86, MediaTek, Qualcomm, Broadcom) • 5G/4G bonding routers — inventor on a filed patent for MPTCP scheduling (Indian Patent App. No. 202541092429) • Self-healing mesh networks (BATMAN-adv, 802.11s) with fast roaming • Cloud-managed captive portals (CoovaChilli), Multi-VLAN isolation for hospitality & POS • MQTT telemetry, OTA/FOTA upgrades, remote device management • Edge AI & agentic workflows — AI-enabled domain filtering, custom automation agents Recent wins: • Led the technical turnaround of a US client's stalled product line (CleanRouter, Arizona) as a remote contractor — resolved critical legacy bugs, re-architected mesh communication logic, and took products to shipment-ready • Architected a 5G cellular bonding router with integrated NVR for professional livestreaming • Built enterprise cloud-controlled switches with per-VLAN captive portals and Chromecast isolation for hotels Remote-first, working worldwide. If you need firmware that survives real-world deployments — or AI woven into your network stack — let's talk.

I help businesses secure and optimize Linux infrastructure, firewalls, VPNs and virtualization environments. Specialized in: Network & Security: OPNsense | pfSense | Wazuh SIEM Wireless & Infrastructure: Ubiquiti UniFi Ecosystem Virtualization & Backup: Proxmox VE | Proxmox Backup Server VPN & Connectivity: WireGuard | OpenVPN | Cloudflare Tunnel SysAdmin & DevOps: Linux Servers | Docker | Reverse Proxy Core Services: Network Troubleshooting | Infrastructure Hardening I work mainly with: VPN issues Firewall configuration Secure remote access Reverse proxy problems Linux server deployments Monitoring and log analysis High availability environments I focus on fast troubleshooting, security best practices and stable infrastructure delivery. If you need someone to solve infrastructure and security problems quickly and professionally, let’s talk.

Looking for challenging new projects which can effectively use my talents and creativity, to generate cost effective software solutions. I'm a world class C programmer (primarily on Unix/Linux) and I'm used to making "impossible" tasks "possible". I have a great deal of expertise in: * real time embedded systems * cross compilation/software construction * source control * network programming * system administration * kernel level programming/device drivers * image processing * performance and metrics

Need someone who can manage your Linux infrastructure and actually knows what's happening below the application layer? I'm Shivam, a Linux systems engineer and DevOps specialist with 5+ years of experience, and a contributor to the Linux kernel mainline. I build, secure, and debug Linux servers and cloud infrastructure with the kind of low-level systems knowledge most DevOps engineers don't have. 𝐇𝐎𝐖 𝐈 𝐂𝐀𝐍 𝐇𝐄𝐋𝐏 𝐘𝐎𝐔 🐧 𝐋𝐢𝐧𝐮𝐱 𝐒𝐲𝐬𝐭𝐞𝐦 𝐀𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧 Provision, configure, and harden Linux servers (Ubuntu, Debian, RHEL/CentOS). Comfortable with systemd, networking, user/permission management, backups, and security hardening for production systems. 🧩 𝐋𝐢𝐧𝐮𝐱 𝐊𝐞𝐫𝐧𝐞𝐥 𝐃𝐞𝐛𝐮𝐠𝐠𝐢𝐧𝐠 & 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐓𝐮𝐧𝐢𝐧𝐠 As an actual contributor to the Linux kernel mainline, I can dig into problems most admins can't, kernel-level memory issues, driver conflicts, and performance bottlenecks below the application layer, not just symptom-level fixes. ⚙️ 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 𝐚𝐬 𝐂𝐨𝐝𝐞 CI/CD pipelines, Docker containerization, and Terraform-managed infrastructure. I build fault-tolerant, repeatable systems instead of fragile ones held together with manual SSH sessions. 🌐 𝐂𝐥𝐨𝐮𝐝𝐟𝐥𝐚𝐫𝐞 𝐒𝐞𝐭𝐮𝐩 & 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 DNS configuration, CDN tuning, WAF/security rules, and Cloudflare Workers for edge logic, get your site fast, secure, and resilient. ☁️ 𝐂𝐥𝐨𝐮𝐝 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 (𝐀𝐖𝐒) EC2, Lambda, S3, and CloudWatch setups designed for reliability and cost efficiency, backed by my AWS Certified AI Practitioner credential. 🏆 𝐋𝐈𝐍𝐔𝐗 𝐊𝐄𝐑𝐍𝐄𝐋 𝐌𝐀𝐈𝐍𝐋𝐈𝐍𝐄 𝐂𝐎𝐍𝐓𝐑𝐈𝐁𝐔𝐓𝐎𝐑 This is the part most Linux freelancers can't say: I've had patches merged into the actual Linux kernel. My work has included fixing how `vrealloc()` releases physical memory pages when shrinking allocations (it previously only updated bookkeeping), adding memory-shrinking support to a Rust kernel data structure, and a related optimization in the Rust binder driver, plus hardware-specific display/backlight driver fixes. The work was reviewed and signed off by core Linux maintainers, including Andrew Morton, the longtime maintainer of the kernel's memory-management subsystem. In practical terms: if your issue is below what a typical sysadmin can diagnose, an odd kernel panic, a memory leak invisible to application logs, a misbehaving driver, I can read the kernel source and actually fix it. 🌟 𝐖𝐇𝐀𝐓 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐒𝐀𝐘 🌟 ❝ Working with Shivam was a fantastic experience. His expertise in performance-oriented languages like Rust and C++ was a game-changer for our project. He delivered a highly efficient and meticulously optimized solution, demonstrating a rare talent for deep, logical problem-solving at the systems level. What impressed me most was his ability to connect this low-level expertise with high-level strategic thinking. He doesn't just understand the algorithms; he has the foundation to make them run incredibly fast. Highly recommend for any demanding technical role. ❞ - Client ❝ great to work with ❞ - Adam C. ❝ Shivam was amazing. This was my second time using him for a project and I was extremely happy. I will definitely be going back to him for any new projects. ❞ - Salman L. ➤ 𝐑𝐄𝐀𝐃𝐘 𝐓𝐎 𝐅𝐈𝐗 𝐀𝐍𝐃 𝐇𝐀𝐑𝐃𝐄𝐍 𝐘𝐎𝐔𝐑 𝐈𝐍𝐅𝐑𝐀𝐒𝐓𝐑𝐔𝐂𝐓𝐔𝐑𝐄? Looking for a Linux system administrator, DevOps engineer, or Cloudflare specialist who understands systems from the kernel up? Message me on Upwork today. I typically respond within 6 hours and prioritize delivering production-ready results. 𝐓𝐎𝐎𝐋𝐒 & 𝐓𝐄𝐂𝐇𝐍𝐎𝐋𝐎𝐆𝐘 𝐋𝐢𝐧𝐮𝐱 & 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 - Linux Kernel (mainline contributor) - Ubuntu / Debian / RHEL / CentOS - systemd, Bash scripting - Networking & firewall configuration (iptables/nftables) - Server hardening & security - Performance debugging (strace, perf, ftrace) 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 - Docker - Terraform - CI/CD (GitHub Actions, GitLab CI, Jenkins) - Ansible - Monitoring (Prometheus, Grafana) 𝐂𝐥𝐨𝐮𝐝 & 𝐄𝐝𝐠𝐞 - AWS (EC2, Lambda, S3, CloudWatch, SageMaker) - Cloudflare (Workers, DNS, CDN, WAF, Zero Trust) - AWS Certified AI Practitioner 𝐏𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐢𝐧𝐠 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 - Rust - Python - Node.js / TypeScript - Bash 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬 - PostgreSQL - MongoDB - Redis Linux System Administrator, Linux System Administration, Linux Kernel Developer, Linux Server Management, Linux DevOps, DevOps Engineer, Senior DevOps Engineer, Cloudflare